mirror of
https://github.com/spring-projects/spring-framework
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@@ -8,7 +8,7 @@
|
||||
"@build.name": "${buildName}",
|
||||
"@build.number": "${buildNumber}",
|
||||
"path": {
|
||||
"$nmatch": "org/springframework/framework-api/*"
|
||||
"$nmatch": "org/springframework/framework-docs/*"
|
||||
}
|
||||
}
|
||||
]
|
||||
|
||||
@@ -2,7 +2,7 @@ name: Build and Deploy Snapshot
|
||||
on:
|
||||
push:
|
||||
branches:
|
||||
- 6.1.x
|
||||
- 6.0.x
|
||||
concurrency:
|
||||
group: ${{ github.workflow }}-${{ github.ref }}
|
||||
jobs:
|
||||
@@ -26,15 +26,16 @@ jobs:
|
||||
uri: 'https://repo.spring.io'
|
||||
username: ${{ secrets.ARTIFACTORY_USERNAME }}
|
||||
password: ${{ secrets.ARTIFACTORY_PASSWORD }}
|
||||
build-name: 'spring-framework-6.1.x'
|
||||
build-name: 'spring-framework-6.0.x'
|
||||
repository: 'libs-snapshot-local'
|
||||
folder: 'deployment-repository'
|
||||
signing-key: ${{ secrets.GPG_PRIVATE_KEY }}
|
||||
signing-passphrase: ${{ secrets.GPG_PASSPHRASE }}
|
||||
artifact-properties: |
|
||||
/**/framework-api-*.zip::zip.name=spring-framework,zip.deployed=false
|
||||
/**/framework-api-*-docs.zip::zip.type=docs
|
||||
/**/framework-api-*-schema.zip::zip.type=schema
|
||||
/**/framework-docs-*.zip::zip.name=spring-framework,zip.deployed=false
|
||||
/**/framework-docs-*-docs.zip::zip.type=docs
|
||||
/**/framework-docs-*-dist.zip::zip.type=dist
|
||||
/**/framework-docs-*-schema.zip::zip.type=schema
|
||||
- name: Send Notification
|
||||
uses: ./.github/actions/send-notification
|
||||
if: always()
|
||||
|
||||
@@ -2,7 +2,7 @@ name: CI
|
||||
on:
|
||||
push:
|
||||
branches:
|
||||
- 6.1.x
|
||||
- 6.0.x
|
||||
concurrency:
|
||||
group: ${{ github.workflow }}-${{ github.ref }}
|
||||
jobs:
|
||||
@@ -21,11 +21,6 @@ jobs:
|
||||
toolchain: false
|
||||
- version: 21
|
||||
toolchain: true
|
||||
- version: 22
|
||||
toolchain: true
|
||||
- version: 23
|
||||
early-access: true
|
||||
toolchain: true
|
||||
exclude:
|
||||
- os:
|
||||
name: Linux
|
||||
|
||||
@@ -2,7 +2,7 @@ name: Release
|
||||
on:
|
||||
push:
|
||||
tags:
|
||||
- v6.1.[0-9]+
|
||||
- v6.0.[0-9]+
|
||||
concurrency:
|
||||
group: ${{ github.workflow }}-${{ github.ref }}
|
||||
jobs:
|
||||
@@ -31,9 +31,10 @@ jobs:
|
||||
signing-key: ${{ secrets.GPG_PRIVATE_KEY }}
|
||||
signing-passphrase: ${{ secrets.GPG_PASSPHRASE }}
|
||||
artifact-properties: |
|
||||
/**/framework-api-*.zip::zip.name=spring-framework,zip.deployed=false
|
||||
/**/framework-api-*-docs.zip::zip.type=docs
|
||||
/**/framework-api-*-schema.zip::zip.type=schema
|
||||
/**/framework-docs-*.zip::zip.name=spring-framework,zip.deployed=false
|
||||
/**/framework-docs-*-docs.zip::zip.type=docs
|
||||
/**/framework-docs-*-dist.zip::zip.type=dist
|
||||
/**/framework-docs-*-schema.zip::zip.type=schema
|
||||
outputs:
|
||||
version: ${{ steps.build-and-publish.outputs.version }}
|
||||
verify:
|
||||
|
||||
@@ -1,3 +1,3 @@
|
||||
# Enable auto-env through the sdkman_auto_env config
|
||||
# Add key=value pairs of SDKs to use below
|
||||
java=17.0.12-librca
|
||||
java=17.0.11-librca
|
||||
|
||||
@@ -0,0 +1,44 @@
|
||||
= Contributor Code of Conduct
|
||||
|
||||
As contributors and maintainers of this project, and in the interest of fostering an open
|
||||
and welcoming community, we pledge to respect all people who contribute through reporting
|
||||
issues, posting feature requests, updating documentation, submitting pull requests or
|
||||
patches, and other activities.
|
||||
|
||||
We are committed to making participation in this project a harassment-free experience for
|
||||
everyone, regardless of level of experience, gender, gender identity and expression,
|
||||
sexual orientation, disability, personal appearance, body size, race, ethnicity, age,
|
||||
religion, or nationality.
|
||||
|
||||
Examples of unacceptable behavior by participants include:
|
||||
|
||||
* The use of sexualized language or imagery
|
||||
* Personal attacks
|
||||
* Trolling or insulting/derogatory comments
|
||||
* Public or private harassment
|
||||
* Publishing other's private information, such as physical or electronic addresses,
|
||||
without explicit permission
|
||||
* Other unethical or unprofessional conduct
|
||||
|
||||
Project maintainers have the right and responsibility to remove, edit, or reject comments,
|
||||
commits, code, wiki edits, issues, and other contributions that are not aligned to this
|
||||
Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors
|
||||
that they deem inappropriate, threatening, offensive, or harmful.
|
||||
|
||||
By adopting this Code of Conduct, project maintainers commit themselves to fairly and
|
||||
consistently applying these principles to every aspect of managing this project. Project
|
||||
maintainers who do not follow or enforce the Code of Conduct may be permanently removed
|
||||
from the project team.
|
||||
|
||||
This Code of Conduct applies both within project spaces and in public spaces when an
|
||||
individual is representing the project or its community.
|
||||
|
||||
Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by
|
||||
contacting a project maintainer at spring-code-of-conduct@pivotal.io . All complaints will
|
||||
be reviewed and investigated and will result in a response that is deemed necessary and
|
||||
appropriate to the circumstances. Maintainers are obligated to maintain confidentiality
|
||||
with regard to the reporter of an incident.
|
||||
|
||||
This Code of Conduct is adapted from the
|
||||
https://contributor-covenant.org[Contributor Covenant], version 1.3.0, available at
|
||||
https://contributor-covenant.org/version/1/3/0/[contributor-covenant.org/version/1/3/0/]
|
||||
+7
-7
@@ -18,7 +18,7 @@ First off, thank you for taking the time to contribute! :+1: :tada:
|
||||
|
||||
This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc).
|
||||
By participating you are expected to uphold this code.
|
||||
Please report unacceptable behavior to spring-code-of-conduct@spring.io.
|
||||
Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
|
||||
|
||||
### How to Contribute
|
||||
|
||||
@@ -123,13 +123,13 @@ define the source file coding standards we use along with some IDEA editor setti
|
||||
|
||||
### Reference Docs
|
||||
|
||||
The reference documentation is authored in [Asciidoctor](https://asciidoctor.org/) format
|
||||
using [Antora](https://docs.antora.org/antora/latest/). The source files for the documentation
|
||||
reside in the [framework-docs/modules/ROOT](framework-docs/modules/ROOT) directory. For
|
||||
trivial changes, you may be able to browse, edit source files, and submit directly from GitHub.
|
||||
The reference documentation is in the [framework-docs/src/docs/asciidoc](framework-docs/src/docs/asciidoc) directory, in
|
||||
[Asciidoctor](https://asciidoctor.org/) format. For trivial changes, you may be able to browse,
|
||||
edit source files, and submit directly from GitHub.
|
||||
|
||||
When making changes locally, execute `./gradlew antora` and then browse the results under
|
||||
`framework-docs/build/site/index.html`.
|
||||
When making changes locally, execute `./gradlew :framework-docs:asciidoctor` and then browse the result under
|
||||
`framework-docs/build/docs/ref-docs/html5/index.html`.
|
||||
|
||||
Asciidoctor also supports live editing. For more details see
|
||||
[AsciiDoc Tooling](https://docs.asciidoctor.org/asciidoctor/latest/tooling/).
|
||||
|
||||
|
||||
@@ -1,12 +1,12 @@
|
||||
# <img src="framework-docs/src/docs/spring-framework.png" width="80" height="80"> Spring Framework [](https://github.com/spring-projects/spring-framework/actions/workflows/build-and-deploy-snapshot.yml?query=branch%3A6.1.x) [](https://ge.spring.io/scans?search.rootProjectNames=spring)
|
||||
# <img src="framework-docs/src/docs/spring-framework.png" width="80" height="80"> Spring Framework [](https://github.com/spring-projects/spring-framework/actions/workflows/build-and-deploy-snapshot.yml?query=branch%3A6.0.x) [](https://ge.spring.io/scans?search.rootProjectNames=spring)
|
||||
|
||||
This is the home of the Spring Framework: the foundation for all [Spring projects](https://spring.io/projects). Collectively the Spring Framework and the family of Spring projects are often referred to simply as "Spring".
|
||||
|
||||
Spring provides everything required beyond the Java programming language for creating enterprise applications for a wide range of scenarios and architectures. Please read the [Overview](https://docs.spring.io/spring-framework/reference/overview.html) section of the reference documentation for a more complete introduction.
|
||||
Spring provides everything required beyond the Java programming language for creating enterprise applications for a wide range of scenarios and architectures. Please read the [Overview](https://docs.spring.io/spring/docs/current/spring-framework-reference/overview.html#spring-introduction) section as reference for a more complete introduction.
|
||||
|
||||
## Code of Conduct
|
||||
|
||||
This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc). By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@spring.io.
|
||||
This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc). By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
|
||||
|
||||
## Access to Binaries
|
||||
|
||||
@@ -14,7 +14,7 @@ For access to artifacts or a distribution zip, see the [Spring Framework Artifac
|
||||
|
||||
## Documentation
|
||||
|
||||
The Spring Framework maintains reference documentation ([published](https://docs.spring.io/spring-framework/reference/) and [source](framework-docs/modules/ROOT)), GitHub [wiki pages](https://github.com/spring-projects/spring-framework/wiki), and an
|
||||
The Spring Framework maintains reference documentation ([published](https://docs.spring.io/spring-framework/docs/current/spring-framework-reference/) and [source](framework-docs/src/docs/asciidoc)), GitHub [wiki pages](https://github.com/spring-projects/spring-framework/wiki), and an
|
||||
[API reference](https://docs.spring.io/spring-framework/docs/current/javadoc-api/). There are also [guides and tutorials](https://spring.io/guides) across Spring projects.
|
||||
|
||||
## Micro-Benchmarks
|
||||
@@ -31,7 +31,7 @@ Information regarding CI builds can be found in the [Spring Framework Concourse
|
||||
|
||||
## Stay in Touch
|
||||
|
||||
Follow [@SpringCentral](https://twitter.com/springcentral), [@SpringFramework](https://twitter.com/springframework), and its [team members](https://twitter.com/springframework/lists/team/members) on 𝕏. In-depth articles can be found at [The Spring Blog](https://spring.io/blog/), and releases are announced via our [releases feed](https://spring.io/blog/category/releases).
|
||||
Follow [@SpringCentral](https://twitter.com/springcentral), [@SpringFramework](https://twitter.com/springframework), and its [team members](https://twitter.com/springframework/lists/team/members) on Twitter. In-depth articles can be found at [The Spring Blog](https://spring.io/blog/), and releases are announced via our [news feed](https://spring.io/blog/category/news).
|
||||
|
||||
## License
|
||||
|
||||
|
||||
+77
-27
@@ -1,26 +1,22 @@
|
||||
plugins {
|
||||
id 'io.freefair.aspectj' version '8.4' apply false
|
||||
id 'io.spring.nohttp' version '0.0.11'
|
||||
id 'io.freefair.aspectj' version '8.0.1' apply false
|
||||
// kotlinVersion is managed in gradle.properties
|
||||
id 'org.jetbrains.kotlin.plugin.serialization' version "${kotlinVersion}" apply false
|
||||
id 'org.jetbrains.dokka' version '1.8.20'
|
||||
id 'org.unbroken-dome.xjc' version '2.0.0' apply false
|
||||
id 'com.github.ben-manes.versions' version '0.51.0'
|
||||
id 'com.github.bjornvester.xjc' version '1.8.2' apply false
|
||||
id 'com.github.johnrengelman.shadow' version '8.1.1' apply false
|
||||
id 'de.undercouch.download' version '5.4.0'
|
||||
id 'io.github.goooler.shadow' version '8.1.8' apply false
|
||||
id 'me.champeau.jmh' version '0.7.2' apply false
|
||||
id 'me.champeau.mrjar' version '0.1.1'
|
||||
}
|
||||
|
||||
ext {
|
||||
moduleProjects = subprojects.findAll { it.name.startsWith("spring-") }
|
||||
javaProjects = subprojects.findAll { !it.name.startsWith("framework-") }
|
||||
javaProjects = subprojects - project(":framework-bom") - project(":framework-platform")
|
||||
}
|
||||
|
||||
description = "Spring Framework"
|
||||
|
||||
configure(allprojects) { project ->
|
||||
apply plugin: "org.springframework.build.localdev"
|
||||
group = "org.springframework"
|
||||
repositories {
|
||||
mavenCentral()
|
||||
maven {
|
||||
@@ -45,7 +41,16 @@ configure(allprojects) { project ->
|
||||
}
|
||||
}
|
||||
|
||||
configure(allprojects - project(":framework-platform")) {
|
||||
configure([rootProject] + javaProjects) { project ->
|
||||
group = "org.springframework"
|
||||
|
||||
apply plugin: "java"
|
||||
apply plugin: "java-test-fixtures"
|
||||
apply plugin: "checkstyle"
|
||||
apply plugin: 'org.springframework.build.conventions'
|
||||
apply from: "${rootDir}/gradle/toolchains.gradle"
|
||||
apply from: "${rootDir}/gradle/ide.gradle"
|
||||
|
||||
configurations {
|
||||
dependencyManagement {
|
||||
canBeConsumed = false
|
||||
@@ -54,19 +59,36 @@ configure(allprojects - project(":framework-platform")) {
|
||||
}
|
||||
matching { it.name.endsWith("Classpath") }.all { it.extendsFrom(dependencyManagement) }
|
||||
}
|
||||
|
||||
test {
|
||||
useJUnitPlatform()
|
||||
include(["**/*Tests.class", "**/*Test.class"])
|
||||
systemProperty("java.awt.headless", "true")
|
||||
systemProperty("testGroups", project.properties.get("testGroups"))
|
||||
systemProperty("io.netty.leakDetection.level", "paranoid")
|
||||
systemProperty("io.netty5.leakDetectionLevel", "paranoid")
|
||||
systemProperty("io.netty5.leakDetection.targetRecords", "32")
|
||||
systemProperty("io.netty5.buffer.lifecycleTracingEnabled", "true")
|
||||
systemProperty("io.netty5.buffer.leakDetectionEnabled", "true")
|
||||
jvmArgs(["--add-opens=java.base/java.lang=ALL-UNNAMED",
|
||||
"--add-opens=java.base/java.util=ALL-UNNAMED"])
|
||||
}
|
||||
|
||||
checkstyle {
|
||||
toolVersion = "10.12.7"
|
||||
configDirectory.set(rootProject.file("src/checkstyle"))
|
||||
}
|
||||
|
||||
tasks.named("checkstyleMain").configure {
|
||||
maxHeapSize = "1g"
|
||||
}
|
||||
|
||||
tasks.named("checkstyleTest").configure {
|
||||
maxHeapSize = "1g"
|
||||
}
|
||||
|
||||
dependencies {
|
||||
dependencyManagement(enforcedPlatform(dependencies.project(path: ":framework-platform")))
|
||||
}
|
||||
}
|
||||
|
||||
configure([rootProject] + javaProjects) { project ->
|
||||
apply plugin: "java"
|
||||
apply plugin: "java-test-fixtures"
|
||||
apply plugin: 'org.springframework.build.conventions'
|
||||
apply from: "${rootDir}/gradle/toolchains.gradle"
|
||||
apply from: "${rootDir}/gradle/ide.gradle"
|
||||
|
||||
dependencies {
|
||||
testImplementation("org.junit.jupiter:junit-jupiter-api")
|
||||
testImplementation("org.junit.jupiter:junit-jupiter-params")
|
||||
testImplementation("org.junit.platform:junit-platform-suite-api")
|
||||
@@ -84,6 +106,7 @@ configure([rootProject] + javaProjects) { project ->
|
||||
// JSR-305 only used for non-required meta-annotations
|
||||
compileOnly("com.google.code.findbugs:jsr305")
|
||||
testCompileOnly("com.google.code.findbugs:jsr305")
|
||||
checkstyle("io.spring.javaformat:spring-javaformat-checkstyle:0.0.42")
|
||||
}
|
||||
|
||||
ext.javadocLinks = [
|
||||
@@ -92,26 +115,53 @@ configure([rootProject] + javaProjects) { project ->
|
||||
"https://docs.jboss.org/hibernate/orm/5.6/javadocs/",
|
||||
"https://eclipse.dev/aspectj/doc/released/aspectj5rt-api",
|
||||
"https://www.quartz-scheduler.org/api/2.3.0/",
|
||||
"https://fasterxml.github.io/jackson-core/javadoc/2.14/",
|
||||
"https://fasterxml.github.io/jackson-databind/javadoc/2.14/",
|
||||
"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.14/",
|
||||
"https://www.javadoc.io/doc/com.fasterxml.jackson.core/jackson-core/2.14.1/",
|
||||
"https://www.javadoc.io/doc/com.fasterxml.jackson.core/jackson-databind/2.14.1/",
|
||||
"https://www.javadoc.io/doc/com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.14.1/",
|
||||
"https://hc.apache.org/httpcomponents-client-5.2.x/current/httpclient5/apidocs/",
|
||||
"https://projectreactor.io/docs/test/release/api/",
|
||||
"https://junit.org/junit4/javadoc/4.13.2/",
|
||||
// TODO Uncomment link to JUnit 5 docs once we execute Gradle with Java 18+.
|
||||
// See https://github.com/spring-projects/spring-framework/issues/27497
|
||||
//
|
||||
// "https://junit.org/junit5/docs/5.10.2/api/",
|
||||
// "https://junit.org/junit5/docs/5.9.3/api/",
|
||||
"https://www.reactive-streams.org/reactive-streams-1.0.3-javadoc/",
|
||||
//"https://javadoc.io/static/io.rsocket/rsocket-core/1.1.1/",
|
||||
"https://javadoc.io/static/io.rsocket/rsocket-core/1.1.1/",
|
||||
"https://r2dbc.io/spec/1.0.0.RELEASE/api/",
|
||||
// Previously there could be a split-package issue between JSR250 and JSR305 javax.annotation packages,
|
||||
// but since 6.0 JSR 250 annotations such as @Resource and @PostConstruct have been replaced by their
|
||||
// JakartaEE equivalents in the jakarta.annotation package.
|
||||
//"https://www.javadoc.io/doc/com.google.code.findbugs/jsr305/3.0.2/"
|
||||
"https://www.javadoc.io/doc/com.google.code.findbugs/jsr305/3.0.2/"
|
||||
] as String[]
|
||||
}
|
||||
|
||||
configure(moduleProjects) { project ->
|
||||
apply from: "${rootDir}/gradle/spring-module.gradle"
|
||||
}
|
||||
|
||||
configure(rootProject) {
|
||||
description = "Spring Framework"
|
||||
|
||||
apply plugin: "io.spring.nohttp"
|
||||
|
||||
nohttp {
|
||||
source.exclude "**/test-output/**"
|
||||
source.exclude "**/.gradle/**"
|
||||
allowlistFile = project.file("src/nohttp/allowlist.lines")
|
||||
def rootPath = file(rootDir).toPath()
|
||||
def projectDirs = allprojects.collect { it.projectDir } + "${rootDir}/buildSrc"
|
||||
projectDirs.forEach { dir ->
|
||||
[ 'bin', 'build', 'out', '.settings', 'node_modules' ]
|
||||
.collect { rootPath.relativize(new File(dir, it).toPath()) }
|
||||
.forEach { source.exclude "$it/**" }
|
||||
[ '.classpath', '.project' ]
|
||||
.collect { rootPath.relativize(new File(dir, it).toPath()) }
|
||||
.forEach { source.exclude "$it" }
|
||||
}
|
||||
}
|
||||
|
||||
tasks.named("checkstyleNohttp").configure {
|
||||
maxHeapSize = "1g"
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
+2
-10
@@ -1,6 +1,5 @@
|
||||
plugins {
|
||||
id 'java-gradle-plugin'
|
||||
id 'checkstyle'
|
||||
}
|
||||
|
||||
repositories {
|
||||
@@ -18,12 +17,9 @@ ext {
|
||||
}
|
||||
|
||||
dependencies {
|
||||
checkstyle "io.spring.javaformat:spring-javaformat-checkstyle:${javaFormatVersion}"
|
||||
implementation "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}"
|
||||
implementation "org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}"
|
||||
implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
|
||||
implementation("org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}")
|
||||
implementation "org.gradle:test-retry-gradle-plugin:1.5.6"
|
||||
implementation "io.spring.javaformat:spring-javaformat-gradle-plugin:${javaFormatVersion}"
|
||||
implementation "io.spring.nohttp:nohttp-gradle:0.0.11"
|
||||
}
|
||||
|
||||
gradlePlugin {
|
||||
@@ -32,10 +28,6 @@ gradlePlugin {
|
||||
id = "org.springframework.build.conventions"
|
||||
implementationClass = "org.springframework.build.ConventionsPlugin"
|
||||
}
|
||||
localDevPlugin {
|
||||
id = "org.springframework.build.localdev"
|
||||
implementationClass = "org.springframework.build.dev.LocalDevelopmentPlugin"
|
||||
}
|
||||
optionalDependenciesPlugin {
|
||||
id = "org.springframework.build.optional-dependencies"
|
||||
implementationClass = "org.springframework.build.optional.OptionalDependenciesPlugin"
|
||||
|
||||
@@ -1,27 +0,0 @@
|
||||
<?xml version="1.0"?>
|
||||
<!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd">
|
||||
<module name="com.puppycrawl.tools.checkstyle.Checker">
|
||||
|
||||
<!-- Root Checks -->
|
||||
<module name="io.spring.javaformat.checkstyle.check.SpringHeaderCheck">
|
||||
<property name="fileExtensions" value="java"/>
|
||||
<property name="headerType" value="apache2"/>
|
||||
<property name="headerCopyrightPattern" value="20\d\d-20\d\d"/>
|
||||
<property name="packageInfoHeaderType" value="none"/>
|
||||
</module>
|
||||
<module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck"/>
|
||||
|
||||
<!-- TreeWalker Checks -->
|
||||
<module name="com.puppycrawl.tools.checkstyle.TreeWalker">
|
||||
|
||||
<!-- Imports -->
|
||||
<module name="com.puppycrawl.tools.checkstyle.checks.imports.UnusedImportsCheck">
|
||||
<property name="processJavadoc" value="true"/>
|
||||
</module>
|
||||
|
||||
<!-- Modifiers -->
|
||||
<module name="com.puppycrawl.tools.checkstyle.checks.modifier.ModifierOrderCheck"/>
|
||||
|
||||
</module>
|
||||
|
||||
</module>
|
||||
@@ -1,2 +1 @@
|
||||
org.gradle.caching=true
|
||||
javaFormatVersion=0.0.42
|
||||
|
||||
@@ -1,79 +0,0 @@
|
||||
/*
|
||||
* Copyright 2002-2024 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* https://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.build;
|
||||
|
||||
import java.io.File;
|
||||
import java.nio.file.Path;
|
||||
import java.util.List;
|
||||
|
||||
import io.spring.javaformat.gradle.SpringJavaFormatPlugin;
|
||||
import io.spring.nohttp.gradle.NoHttpExtension;
|
||||
import io.spring.nohttp.gradle.NoHttpPlugin;
|
||||
import org.gradle.api.Plugin;
|
||||
import org.gradle.api.Project;
|
||||
import org.gradle.api.artifacts.DependencySet;
|
||||
import org.gradle.api.plugins.JavaBasePlugin;
|
||||
import org.gradle.api.plugins.quality.Checkstyle;
|
||||
import org.gradle.api.plugins.quality.CheckstyleExtension;
|
||||
import org.gradle.api.plugins.quality.CheckstylePlugin;
|
||||
|
||||
/**
|
||||
* {@link Plugin} that applies conventions for checkstyle.
|
||||
*
|
||||
* @author Brian Clozel
|
||||
*/
|
||||
public class CheckstyleConventions {
|
||||
|
||||
/**
|
||||
* Applies the Spring Java Format and Checkstyle plugins with the project conventions.
|
||||
* @param project the current project
|
||||
*/
|
||||
public void apply(Project project) {
|
||||
project.getPlugins().withType(JavaBasePlugin.class, (java) -> {
|
||||
if (project.getRootProject() == project) {
|
||||
configureNoHttpPlugin(project);
|
||||
}
|
||||
project.getPlugins().apply(CheckstylePlugin.class);
|
||||
project.getTasks().withType(Checkstyle.class).forEach(checkstyle -> checkstyle.getMaxHeapSize().set("1g"));
|
||||
CheckstyleExtension checkstyle = project.getExtensions().getByType(CheckstyleExtension.class);
|
||||
checkstyle.setToolVersion("10.17.0");
|
||||
checkstyle.getConfigDirectory().set(project.getRootProject().file("src/checkstyle"));
|
||||
String version = SpringJavaFormatPlugin.class.getPackage().getImplementationVersion();
|
||||
DependencySet checkstyleDependencies = project.getConfigurations().getByName("checkstyle").getDependencies();
|
||||
checkstyleDependencies.add(
|
||||
project.getDependencies().create("io.spring.javaformat:spring-javaformat-checkstyle:" + version));
|
||||
});
|
||||
}
|
||||
|
||||
private static void configureNoHttpPlugin(Project project) {
|
||||
project.getPlugins().apply(NoHttpPlugin.class);
|
||||
NoHttpExtension noHttp = project.getExtensions().getByType(NoHttpExtension.class);
|
||||
noHttp.setAllowlistFile(project.file("src/nohttp/allowlist.lines"));
|
||||
noHttp.getSource().exclude("**/test-output/**", "**/.settings/**",
|
||||
"**/.classpath", "**/.project", "**/.gradle/**", "**/node_modules/**");
|
||||
List<String> buildFolders = List.of("bin", "build", "out");
|
||||
project.allprojects(subproject -> {
|
||||
Path rootPath = project.getRootDir().toPath();
|
||||
Path projectPath = rootPath.relativize(subproject.getProjectDir().toPath());
|
||||
for (String buildFolder : buildFolders) {
|
||||
Path innerBuildDir = projectPath.resolve(buildFolder);
|
||||
noHttp.getSource().exclude(innerBuildDir + File.separator + "**");
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
}
|
||||
@@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
* Copyright 2002-2022 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
@@ -25,8 +25,10 @@ import org.jetbrains.kotlin.gradle.plugin.KotlinBasePlugin;
|
||||
* Plugin to apply conventions to projects that are part of Spring Framework's build.
|
||||
* Conventions are applied in response to various plugins being applied.
|
||||
*
|
||||
* <p>When the {@link JavaBasePlugin} is applied, the conventions in {@link CheckstyleConventions},
|
||||
* {@link TestConventions} and {@link JavaConventions} are applied.
|
||||
* When the {@link JavaBasePlugin} is applied, the conventions in {@link TestConventions}
|
||||
* are applied.
|
||||
* When the {@link JavaBasePlugin} is applied, the conventions in {@link JavaConventions}
|
||||
* are applied.
|
||||
* When the {@link KotlinBasePlugin} is applied, the conventions in {@link KotlinConventions}
|
||||
* are applied.
|
||||
*
|
||||
@@ -36,10 +38,8 @@ public class ConventionsPlugin implements Plugin<Project> {
|
||||
|
||||
@Override
|
||||
public void apply(Project project) {
|
||||
new CheckstyleConventions().apply(project);
|
||||
new JavaConventions().apply(project);
|
||||
new KotlinConventions().apply(project);
|
||||
new TestConventions().apply(project);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
* Copyright 2002-2022 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
@@ -24,10 +24,7 @@ import org.gradle.api.Plugin;
|
||||
import org.gradle.api.Project;
|
||||
import org.gradle.api.plugins.JavaBasePlugin;
|
||||
import org.gradle.api.plugins.JavaPlugin;
|
||||
import org.gradle.api.plugins.JavaPluginExtension;
|
||||
import org.gradle.api.tasks.compile.JavaCompile;
|
||||
import org.gradle.jvm.toolchain.JavaLanguageVersion;
|
||||
import org.gradle.jvm.toolchain.JvmVendorSpec;
|
||||
|
||||
/**
|
||||
* {@link Plugin} that applies conventions for compiling Java sources in Spring Framework.
|
||||
@@ -71,10 +68,6 @@ public class JavaConventions {
|
||||
* @param project the current project
|
||||
*/
|
||||
private void applyJavaCompileConventions(Project project) {
|
||||
project.getExtensions().getByType(JavaPluginExtension.class).toolchain(toolchain -> {
|
||||
toolchain.getVendor().set(JvmVendorSpec.BELLSOFT);
|
||||
toolchain.getLanguageVersion().set(JavaLanguageVersion.of(17));
|
||||
});
|
||||
project.getTasks().withType(JavaCompile.class)
|
||||
.matching(compileTask -> compileTask.getName().equals(JavaPlugin.COMPILE_JAVA_TASK_NAME))
|
||||
.forEach(compileTask -> {
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Copyright 2002-2024 the original author or authors.
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
@@ -16,8 +16,6 @@
|
||||
|
||||
package org.springframework.build;
|
||||
|
||||
import java.util.Map;
|
||||
|
||||
import org.gradle.api.Project;
|
||||
import org.gradle.api.plugins.JavaBasePlugin;
|
||||
import org.gradle.api.tasks.testing.Test;
|
||||
@@ -43,38 +41,11 @@ class TestConventions {
|
||||
|
||||
private void configureTestConventions(Project project) {
|
||||
project.getTasks().withType(Test.class,
|
||||
test -> {
|
||||
configureTests(project, test);
|
||||
configureTestRetryPlugin(project, test);
|
||||
});
|
||||
}
|
||||
|
||||
private void configureTests(Project project, Test test) {
|
||||
test.useJUnitPlatform();
|
||||
test.include("**/*Tests.class", "**/*Test.class");
|
||||
test.setSystemProperties(Map.of(
|
||||
"java.awt.headless", "true",
|
||||
"io.netty.leakDetection.level", "paranoid",
|
||||
"io.netty5.leakDetectionLevel", "paranoid",
|
||||
"io.netty5.leakDetection.targetRecords", "32",
|
||||
"io.netty5.buffer.lifecycleTracingEnabled", "true"
|
||||
));
|
||||
if (project.hasProperty("testGroups")) {
|
||||
test.systemProperty("testGroups", project.getProperties().get("testGroups"));
|
||||
}
|
||||
test.jvmArgs(
|
||||
"--add-opens=java.base/java.lang=ALL-UNNAMED",
|
||||
"--add-opens=java.base/java.util=ALL-UNNAMED",
|
||||
"-Xshare:off"
|
||||
);
|
||||
}
|
||||
|
||||
private void configureTestRetryPlugin(Project project, Test test) {
|
||||
project.getPlugins().withType(TestRetryPlugin.class, testRetryPlugin -> {
|
||||
TestRetryTaskExtension testRetry = test.getExtensions().getByType(TestRetryTaskExtension.class);
|
||||
testRetry.getFailOnPassedAfterRetry().set(true);
|
||||
testRetry.getMaxRetries().set(isCi() ? 3 : 0);
|
||||
});
|
||||
test -> project.getPlugins().withType(TestRetryPlugin.class, testRetryPlugin -> {
|
||||
TestRetryTaskExtension testRetry = test.getExtensions().getByType(TestRetryTaskExtension.class);
|
||||
testRetry.getFailOnPassedAfterRetry().set(true);
|
||||
testRetry.getMaxRetries().set(isCi() ? 3 : 0);
|
||||
}));
|
||||
}
|
||||
|
||||
private boolean isCi() {
|
||||
|
||||
@@ -1,49 +0,0 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* https://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.build.dev;
|
||||
|
||||
import org.gradle.api.Plugin;
|
||||
import org.gradle.api.Project;
|
||||
import org.gradle.api.plugins.JavaBasePlugin;
|
||||
|
||||
/**
|
||||
* {@link Plugin} that skips documentation tasks when the {@code "-PskipDocs"} property is defined.
|
||||
*
|
||||
* @author Brian Clozel
|
||||
*/
|
||||
public class LocalDevelopmentPlugin implements Plugin<Project> {
|
||||
|
||||
private static final String SKIP_DOCS_PROPERTY = "skipDocs";
|
||||
|
||||
@Override
|
||||
public void apply(Project target) {
|
||||
if (target.hasProperty(SKIP_DOCS_PROPERTY)) {
|
||||
skipDocumentationTasks(target);
|
||||
target.subprojects(this::skipDocumentationTasks);
|
||||
}
|
||||
}
|
||||
|
||||
private void skipDocumentationTasks(Project project) {
|
||||
project.afterEvaluate(p -> {
|
||||
p.getTasks().matching(task -> {
|
||||
return JavaBasePlugin.DOCUMENTATION_GROUP.equals(task.getGroup())
|
||||
|| "distribution".equals(task.getGroup());
|
||||
})
|
||||
.forEach(task -> task.setEnabled(false));
|
||||
});
|
||||
}
|
||||
}
|
||||
-48
@@ -1,48 +0,0 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* https://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.build.hint;
|
||||
|
||||
import java.util.Collections;
|
||||
|
||||
import org.gradle.api.file.ConfigurableFileCollection;
|
||||
import org.gradle.api.provider.SetProperty;
|
||||
import org.gradle.api.tasks.Classpath;
|
||||
import org.gradle.api.tasks.Input;
|
||||
import org.gradle.process.CommandLineArgumentProvider;
|
||||
|
||||
/**
|
||||
* Argument provider for registering the runtime hints agent with a Java process.
|
||||
*/
|
||||
public interface RuntimeHintsAgentArgumentProvider extends CommandLineArgumentProvider {
|
||||
|
||||
@Classpath
|
||||
ConfigurableFileCollection getAgentJar();
|
||||
|
||||
@Input
|
||||
SetProperty<String> getIncludedPackages();
|
||||
|
||||
@Input
|
||||
SetProperty<String> getExcludedPackages();
|
||||
|
||||
@Override
|
||||
default Iterable<String> asArguments() {
|
||||
StringBuilder packages = new StringBuilder();
|
||||
getIncludedPackages().get().forEach(packageName -> packages.append('+').append(packageName).append(','));
|
||||
getExcludedPackages().get().forEach(packageName -> packages.append('-').append(packageName).append(','));
|
||||
return Collections.singleton("-javaagent:" + getAgentJar().getSingleFile() + "=" + packages);
|
||||
}
|
||||
}
|
||||
+27
-4
@@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
* Copyright 2002-2022 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
@@ -16,15 +16,38 @@
|
||||
|
||||
package org.springframework.build.hint;
|
||||
|
||||
import java.util.Collections;
|
||||
|
||||
import org.gradle.api.model.ObjectFactory;
|
||||
import org.gradle.api.provider.SetProperty;
|
||||
|
||||
/**
|
||||
* Entry point to the DSL extension for the {@link RuntimeHintsAgentPlugin} Gradle plugin.
|
||||
* @author Brian Clozel
|
||||
*/
|
||||
public interface RuntimeHintsAgentExtension {
|
||||
public class RuntimeHintsAgentExtension {
|
||||
|
||||
SetProperty<String> getIncludedPackages();
|
||||
private final SetProperty<String> includedPackages;
|
||||
|
||||
SetProperty<String> getExcludedPackages();
|
||||
private final SetProperty<String> excludedPackages;
|
||||
|
||||
public RuntimeHintsAgentExtension(ObjectFactory objectFactory) {
|
||||
this.includedPackages = objectFactory.setProperty(String.class).convention(Collections.singleton("org.springframework"));
|
||||
this.excludedPackages = objectFactory.setProperty(String.class).convention(Collections.emptySet());
|
||||
}
|
||||
|
||||
public SetProperty<String> getIncludedPackages() {
|
||||
return this.includedPackages;
|
||||
}
|
||||
|
||||
public SetProperty<String> getExcludedPackages() {
|
||||
return this.excludedPackages;
|
||||
}
|
||||
|
||||
String asJavaAgentArgument() {
|
||||
StringBuilder builder = new StringBuilder();
|
||||
this.includedPackages.get().forEach(packageName -> builder.append('+').append(packageName).append(','));
|
||||
this.excludedPackages.get().forEach(packageName -> builder.append('-').append(packageName).append(','));
|
||||
return builder.toString();
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
* Copyright 2002-2022 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
@@ -16,85 +16,41 @@
|
||||
|
||||
package org.springframework.build.hint;
|
||||
|
||||
import org.gradle.api.JavaVersion;
|
||||
import org.gradle.api.Plugin;
|
||||
import org.gradle.api.Project;
|
||||
import org.gradle.api.artifacts.Configuration;
|
||||
import org.gradle.api.attributes.Bundling;
|
||||
import org.gradle.api.attributes.Category;
|
||||
import org.gradle.api.attributes.LibraryElements;
|
||||
import org.gradle.api.attributes.Usage;
|
||||
import org.gradle.api.attributes.java.TargetJvmVersion;
|
||||
import org.gradle.api.plugins.JavaPlugin;
|
||||
import org.gradle.api.plugins.jvm.JvmTestSuite;
|
||||
import org.gradle.api.tasks.bundling.Jar;
|
||||
import org.gradle.api.tasks.testing.Test;
|
||||
import org.gradle.testing.base.TestingExtension;
|
||||
|
||||
import java.util.Collections;
|
||||
|
||||
/**
|
||||
* {@link Plugin} that configures the {@code RuntimeHints} Java agent to test tasks.
|
||||
*
|
||||
* @author Brian Clozel
|
||||
* @author Sebastien Deleuze
|
||||
*/
|
||||
public class RuntimeHintsAgentPlugin implements Plugin<Project> {
|
||||
|
||||
public static final String RUNTIMEHINTS_TEST_TASK = "runtimeHintsTest";
|
||||
private static final String EXTENSION_NAME = "runtimeHintsAgent";
|
||||
private static final String CONFIGURATION_NAME = "testRuntimeHintsAgentJar";
|
||||
|
||||
|
||||
@Override
|
||||
public void apply(Project project) {
|
||||
|
||||
project.getPlugins().withType(JavaPlugin.class, javaPlugin -> {
|
||||
TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
|
||||
JvmTestSuite jvmTestSuite = (JvmTestSuite) testing.getSuites().getByName("test");
|
||||
RuntimeHintsAgentExtension agentExtension = createRuntimeHintsAgentExtension(project);
|
||||
RuntimeHintsAgentExtension agentExtension = project.getExtensions().create(EXTENSION_NAME,
|
||||
RuntimeHintsAgentExtension.class, project.getObjects());
|
||||
Test agentTest = project.getTasks().create(RUNTIMEHINTS_TEST_TASK, Test.class, test -> {
|
||||
test.useJUnitPlatform(options -> {
|
||||
options.includeTags("RuntimeHintsTests");
|
||||
});
|
||||
test.include("**/*Tests.class", "**/*Test.class");
|
||||
test.systemProperty("java.awt.headless", "true");
|
||||
test.systemProperty("org.graalvm.nativeimage.imagecode", "runtime");
|
||||
test.setTestClassesDirs(jvmTestSuite.getSources().getOutput().getClassesDirs());
|
||||
test.setClasspath(jvmTestSuite.getSources().getRuntimeClasspath());
|
||||
test.getJvmArgumentProviders().add(createRuntimeHintsAgentArgumentProvider(project, agentExtension));
|
||||
});
|
||||
project.afterEvaluate(p -> {
|
||||
Jar jar = project.getRootProject().project("spring-core-test").getTasks().withType(Jar.class).named("jar").get();
|
||||
agentTest.jvmArgs("-javaagent:" + jar.getArchiveFile().get().getAsFile() + "=" + agentExtension.asJavaAgentArgument());
|
||||
});
|
||||
project.getTasks().getByName("check", task -> task.dependsOn(agentTest));
|
||||
project.getDependencies().add(CONFIGURATION_NAME, project.project(":spring-core-test"));
|
||||
});
|
||||
}
|
||||
|
||||
private static RuntimeHintsAgentExtension createRuntimeHintsAgentExtension(Project project) {
|
||||
RuntimeHintsAgentExtension agentExtension = project.getExtensions().create(EXTENSION_NAME, RuntimeHintsAgentExtension.class);
|
||||
agentExtension.getIncludedPackages().convention(Collections.singleton("org.springframework"));
|
||||
agentExtension.getExcludedPackages().convention(Collections.emptySet());
|
||||
return agentExtension;
|
||||
}
|
||||
|
||||
private static RuntimeHintsAgentArgumentProvider createRuntimeHintsAgentArgumentProvider(
|
||||
Project project, RuntimeHintsAgentExtension agentExtension) {
|
||||
RuntimeHintsAgentArgumentProvider agentArgumentProvider = project.getObjects().newInstance(RuntimeHintsAgentArgumentProvider.class);
|
||||
agentArgumentProvider.getAgentJar().from(createRuntimeHintsAgentConfiguration(project));
|
||||
agentArgumentProvider.getIncludedPackages().set(agentExtension.getIncludedPackages());
|
||||
agentArgumentProvider.getExcludedPackages().set(agentExtension.getExcludedPackages());
|
||||
return agentArgumentProvider;
|
||||
}
|
||||
|
||||
private static Configuration createRuntimeHintsAgentConfiguration(Project project) {
|
||||
return project.getConfigurations().create(CONFIGURATION_NAME, configuration -> {
|
||||
configuration.setCanBeConsumed(false);
|
||||
configuration.setTransitive(false); // Only the built artifact is required
|
||||
configuration.attributes(attributes -> {
|
||||
attributes.attribute(Bundling.BUNDLING_ATTRIBUTE, project.getObjects().named(Bundling.class, Bundling.EXTERNAL));
|
||||
attributes.attribute(Category.CATEGORY_ATTRIBUTE, project.getObjects().named(Category.class, Category.LIBRARY));
|
||||
attributes.attribute(LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, project.getObjects().named(LibraryElements.class, LibraryElements.JAR));
|
||||
attributes.attribute(TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, Integer.valueOf(JavaVersion.current().getMajorVersion()));
|
||||
attributes.attribute(Usage.USAGE_ATTRIBUTE, project.getObjects().named(Usage.class, Usage.JAVA_RUNTIME));
|
||||
});
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
+5
-5
@@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
* Copyright 2002-2021 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
@@ -19,7 +19,7 @@ package org.springframework.build.optional;
|
||||
import org.gradle.api.Plugin;
|
||||
import org.gradle.api.Project;
|
||||
import org.gradle.api.artifacts.Configuration;
|
||||
import org.gradle.api.plugins.JavaBasePlugin;
|
||||
import org.gradle.api.plugins.JavaPlugin;
|
||||
import org.gradle.api.plugins.JavaPluginExtension;
|
||||
import org.gradle.api.tasks.SourceSetContainer;
|
||||
|
||||
@@ -40,10 +40,10 @@ public class OptionalDependenciesPlugin implements Plugin<Project> {
|
||||
|
||||
@Override
|
||||
public void apply(Project project) {
|
||||
Configuration optional = project.getConfigurations().create(OPTIONAL_CONFIGURATION_NAME);
|
||||
Configuration optional = project.getConfigurations().create("optional");
|
||||
optional.setCanBeConsumed(false);
|
||||
optional.setCanBeResolved(false);
|
||||
project.getPlugins().withType(JavaBasePlugin.class, (javaBasePlugin) -> {
|
||||
project.getPlugins().withType(JavaPlugin.class, (javaPlugin) -> {
|
||||
SourceSetContainer sourceSets = project.getExtensions().getByType(JavaPluginExtension.class)
|
||||
.getSourceSets();
|
||||
sourceSets.all((sourceSet) -> {
|
||||
@@ -53,4 +53,4 @@ public class OptionalDependenciesPlugin implements Plugin<Project> {
|
||||
});
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
@@ -1,19 +1,3 @@
|
||||
/*
|
||||
* Copyright 2002-2023 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* https://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
package org.springframework.build.shadow;
|
||||
|
||||
import java.io.File;
|
||||
|
||||
@@ -1,119 +0,0 @@
|
||||
plugins {
|
||||
id 'java-platform'
|
||||
id 'io.freefair.aggregate-javadoc' version '8.3'
|
||||
}
|
||||
|
||||
description = "Spring Framework API Docs"
|
||||
|
||||
apply from: "${rootDir}/gradle/publications.gradle"
|
||||
|
||||
repositories {
|
||||
maven {
|
||||
url "https://repo.spring.io/release"
|
||||
}
|
||||
}
|
||||
|
||||
dependencies {
|
||||
moduleProjects.each { moduleProject ->
|
||||
javadoc moduleProject
|
||||
}
|
||||
}
|
||||
|
||||
javadoc {
|
||||
title = "${rootProject.description} ${version} API"
|
||||
options {
|
||||
encoding = "UTF-8"
|
||||
memberLevel = JavadocMemberLevel.PROTECTED
|
||||
author = true
|
||||
header = rootProject.description
|
||||
use = true
|
||||
overview = project.relativePath("$rootProject.rootDir/framework-docs/src/docs/api/overview.html")
|
||||
destinationDir = project.java.docsDir.dir("javadoc-api").get().asFile
|
||||
splitIndex = true
|
||||
links(rootProject.ext.javadocLinks)
|
||||
addBooleanOption('Xdoclint:syntax,reference', true) // only check syntax and reference with doclint
|
||||
addBooleanOption('Werror', true) // fail build on Javadoc warnings
|
||||
}
|
||||
maxMemory = "1024m"
|
||||
doFirst {
|
||||
classpath += files(
|
||||
// ensure the javadoc process can resolve types compiled from .aj sources
|
||||
project(":spring-aspects").sourceSets.main.output
|
||||
)
|
||||
classpath += files(moduleProjects.collect { it.sourceSets.main.compileClasspath })
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Produce KDoc for all Spring Framework modules in "build/docs/kdoc"
|
||||
*/
|
||||
rootProject.tasks.dokkaHtmlMultiModule.configure {
|
||||
dependsOn {
|
||||
tasks.named("javadoc")
|
||||
}
|
||||
moduleName.set("spring-framework")
|
||||
outputDirectory.set(project.java.docsDir.dir("kdoc-api").get().asFile)
|
||||
includes.from("$rootProject.rootDir/framework-docs/src/docs/api/dokka-overview.md")
|
||||
}
|
||||
|
||||
/**
|
||||
* Zip all Java docs (javadoc & kdoc) into a single archive
|
||||
*/
|
||||
tasks.register('docsZip', Zip) {
|
||||
dependsOn = ['javadoc', rootProject.tasks.dokkaHtmlMultiModule]
|
||||
group = "distribution"
|
||||
description = "Builds -${archiveClassifier} archive containing api and reference " +
|
||||
"for deployment at https://docs.spring.io/spring-framework/docs/."
|
||||
|
||||
archiveBaseName.set("spring-framework")
|
||||
archiveClassifier.set("docs")
|
||||
from("src/dist") {
|
||||
include "changelog.txt"
|
||||
}
|
||||
from(javadoc) {
|
||||
into "javadoc-api"
|
||||
}
|
||||
from(rootProject.tasks.dokkaHtmlMultiModule.outputDirectory) {
|
||||
into "kdoc-api"
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Zip all Spring Framework schemas into a single archive
|
||||
*/
|
||||
tasks.register('schemaZip', Zip) {
|
||||
group = "distribution"
|
||||
archiveBaseName.set("spring-framework")
|
||||
archiveClassifier.set("schema")
|
||||
description = "Builds -${archiveClassifier} archive containing all " +
|
||||
"XSDs for deployment at https://springframework.org/schema."
|
||||
duplicatesStrategy DuplicatesStrategy.EXCLUDE
|
||||
moduleProjects.each { module ->
|
||||
def Properties schemas = new Properties();
|
||||
|
||||
module.sourceSets.main.resources.find {
|
||||
(it.path.endsWith("META-INF/spring.schemas") || it.path.endsWith("META-INF\\spring.schemas"))
|
||||
}?.withInputStream { schemas.load(it) }
|
||||
|
||||
for (def key : schemas.keySet()) {
|
||||
def shortName = key.replaceAll(/http.*schema.(.*).spring-.*/, '$1')
|
||||
assert shortName != key
|
||||
File xsdFile = module.sourceSets.main.resources.find {
|
||||
(it.path.endsWith(schemas.get(key)) || it.path.endsWith(schemas.get(key).replaceAll('\\/', '\\\\')))
|
||||
}
|
||||
assert xsdFile != null
|
||||
into(shortName) {
|
||||
from xsdFile.path
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
publishing {
|
||||
publications {
|
||||
mavenJava(MavenPublication) {
|
||||
artifact docsZip
|
||||
artifact schemaZip
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -17,78 +17,16 @@ asciidoc:
|
||||
# FIXME: the copyright is not removed
|
||||
# FIXME: The package is not renamed
|
||||
chomp: 'all'
|
||||
fold: 'all'
|
||||
table-stripes: 'odd'
|
||||
include-java: 'example$docs-src/main/java/org/springframework/docs'
|
||||
include-kotlin: 'example$docs-src/main/kotlin/org/springframework/docs'
|
||||
spring-site: 'https://spring.io'
|
||||
spring-site-blog: '{spring-site}/blog'
|
||||
spring-site-cve: "{spring-site}/security"
|
||||
spring-site-guides: '{spring-site}/guides'
|
||||
spring-site-projects: '{spring-site}/projects'
|
||||
spring-site-tools: "{spring-site}/tools"
|
||||
spring-org: 'spring-projects'
|
||||
spring-github-org: "https://github.com/{spring-org}"
|
||||
spring-framework-github: "https://github.com/{spring-org}/spring-framework"
|
||||
spring-framework-code: '{spring-framework-github}/tree/main'
|
||||
spring-framework-issues: '{spring-framework-github}/issues'
|
||||
spring-framework-wiki: '{spring-framework-github}/wiki'
|
||||
# Docs
|
||||
spring-framework-main-code: 'https://github.com/spring-projects/spring-framework/tree/main'
|
||||
docs-site: 'https://docs.spring.io'
|
||||
spring-framework-docs-root: '{docs-site}/spring-framework/docs'
|
||||
spring-framework-api: '{spring-framework-docs-root}/{spring-version}/javadoc-api/org/springframework'
|
||||
spring-framework-api-kdoc: '{spring-framework-docs-root}/{spring-version}/kdoc-api'
|
||||
spring-framework-reference: '{spring-framework-docs-root}/{spring-version}/reference'
|
||||
#
|
||||
# Other Spring portfolio projects
|
||||
spring-boot-docs: '{docs-site}/spring-boot/docs/current/reference/html'
|
||||
spring-boot-issues: '{spring-github-org}/spring-boot/issues'
|
||||
# TODO add more projects / links or just build up on {docs-site}?
|
||||
# TODO rename the below using new conventions
|
||||
docs-spring: "{docs-site}/spring-framework/docs/{spring-version}"
|
||||
docs-spring-framework: '{docs-site}/spring-framework/docs/{spring-version}'
|
||||
api-spring-framework: '{docs-spring-framework}/javadoc-api/org/springframework'
|
||||
docs-graalvm: 'https://www.graalvm.org/22.3/reference-manual'
|
||||
docs-spring-boot: '{docs-site}/spring-boot/docs/current/reference'
|
||||
docs-spring-gemfire: '{docs-site}/spring-gemfire/docs/current/reference'
|
||||
docs-spring-security: '{docs-site}/spring-security/reference'
|
||||
docs-spring-session: '{docs-site}/spring-session/reference'
|
||||
#
|
||||
# External projects URLs and related attributes
|
||||
aspectj-site: 'https://www.eclipse.org/aspectj'
|
||||
aspectj-docs: "{aspectj-site}/doc/released"
|
||||
aspectj-api: "{aspectj-docs}/runtime-api"
|
||||
aspectj-docs-devguide: "{aspectj-docs}/devguide"
|
||||
aspectj-docs-progguide: "{aspectj-docs}/progguide"
|
||||
assertj-docs: 'https://assertj.github.io/doc'
|
||||
baeldung-blog: 'https://www.baeldung.com'
|
||||
bean-validation-site: 'https://beanvalidation.org'
|
||||
graalvm-docs: 'https://www.graalvm.org/22.3/reference-manual'
|
||||
hibernate-validator-site: 'https://hibernate.org/validator/'
|
||||
jackson-docs: 'https://fasterxml.github.io'
|
||||
jackson-github-org: 'https://github.com/FasterXML'
|
||||
java-api: 'https://docs.oracle.com/en/java/javase/17/docs/api'
|
||||
java-tutorial: 'https://docs.oracle.com/javase/tutorial'
|
||||
JSR: 'https://www.jcp.org/en/jsr/detail?id='
|
||||
kotlin-site: 'https://kotlinlang.org'
|
||||
kotlin-docs: '{kotlin-site}/docs'
|
||||
kotlin-api: '{kotlin-site}/api/latest'
|
||||
kotlin-coroutines-api: '{kotlin-site}/api/kotlinx.coroutines'
|
||||
kotlin-github-org: 'https://github.com/Kotlin'
|
||||
kotlin-issues: 'https://youtrack.jetbrains.com/issue'
|
||||
micrometer-docs: 'https://docs.micrometer.io/micrometer/reference'
|
||||
micrometer-context-propagation-docs: 'https://docs.micrometer.io/context-propagation/reference'
|
||||
reactive-streams-site: 'https://www.reactive-streams.org'
|
||||
reactive-streams-spec: 'https://github.com/reactive-streams/reactive-streams-jvm/blob/master/README.md#specification'
|
||||
reactor-github-org: 'https://github.com/reactor'
|
||||
reactor-site: 'https://projectreactor.io'
|
||||
rsocket-github-org: 'https://github.com/rsocket'
|
||||
rsocket-java: '{rsocket-github-org}/rsocket-java'
|
||||
rsocket-java-code: '{rsocket-java}/tree/master/'
|
||||
rsocket-protocol-extensions: '{rsocket-github-org}/rsocket/tree/master/Extensions'
|
||||
rsocket-site: 'https://rsocket.io'
|
||||
rfc-site: 'https://datatracker.ietf.org/doc/html'
|
||||
sockjs-client: 'https://github.com/sockjs/sockjs-client'
|
||||
sockjs-protocol: 'https://github.com/sockjs/sockjs-protocol'
|
||||
sockjs-protocol-site: "https://sockjs.github.io/sockjs-protocol"
|
||||
stackoverflow-site: 'https://stackoverflow.com'
|
||||
stackoverflow-questions: '{stackoverflow-site}/questions'
|
||||
stackoverflow-spring-tag: "{stackoverflow-questions}/tagged/spring"
|
||||
stackoverflow-spring-kotlin-tags: "{stackoverflow-spring-tag}+kotlin"
|
||||
testcontainers-site: 'https://www.testcontainers.org'
|
||||
vavr-docs: 'https://vavr-io.github.io/vavr-docs'
|
||||
gh-rsocket: 'https://github.com/rsocket'
|
||||
gh-rsocket-extensions: '{gh-rsocket}/rsocket/blob/master/Extensions'
|
||||
gh-rsocket-java: '{gh-rsocket}/rsocket-java{gh-rsocket}/rsocket-java'
|
||||
@@ -6,9 +6,9 @@ plugins {
|
||||
|
||||
description = "Spring Framework Docs"
|
||||
|
||||
apply from: "${rootDir}/gradle/ide.gradle"
|
||||
apply from: "${rootDir}/gradle/publications.gradle"
|
||||
|
||||
|
||||
antora {
|
||||
options = [clean: true, fetch: !project.gradle.startParameter.offline, stacktrace: true]
|
||||
environment = [
|
||||
@@ -17,16 +17,23 @@ antora {
|
||||
]
|
||||
}
|
||||
|
||||
|
||||
tasks.named("generateAntoraYml") {
|
||||
asciidocAttributes = project.provider( {
|
||||
return ["spring-version": project.version ]
|
||||
} )
|
||||
}
|
||||
|
||||
tasks.register("generateAntoraResources") {
|
||||
tasks.create("generateAntoraResources") {
|
||||
dependsOn 'generateAntoraYml'
|
||||
}
|
||||
|
||||
// Commented out for now:
|
||||
// https://github.com/spring-projects/spring-framework/issues/30481
|
||||
// tasks.named("check") {
|
||||
// dependsOn 'antora'
|
||||
// }
|
||||
|
||||
jar {
|
||||
enabled = false
|
||||
}
|
||||
@@ -43,16 +50,166 @@ repositories {
|
||||
|
||||
dependencies {
|
||||
api(project(":spring-context"))
|
||||
api(project(":spring-jdbc"))
|
||||
api(project(":spring-jms"))
|
||||
api(project(":spring-web"))
|
||||
api(project(":spring-webflux"))
|
||||
|
||||
api("com.oracle.database.jdbc:ojdbc11")
|
||||
api("jakarta.jms:jakarta.jms-api")
|
||||
api("jakarta.servlet:jakarta.servlet-api")
|
||||
api("org.jetbrains.kotlin:kotlin-stdlib")
|
||||
|
||||
implementation(project(":spring-core-test"))
|
||||
implementation("org.assertj:assertj-core")
|
||||
}
|
||||
|
||||
/**
|
||||
* Produce Javadoc for all Spring Framework modules in "build/docs/javadoc"
|
||||
*/
|
||||
task api(type: Javadoc) {
|
||||
group = "Documentation"
|
||||
description = "Generates aggregated Javadoc API documentation."
|
||||
title = "${rootProject.description} ${version} API"
|
||||
|
||||
dependsOn {
|
||||
moduleProjects.collect {
|
||||
it.tasks.getByName("jar")
|
||||
}
|
||||
}
|
||||
doFirst {
|
||||
classpath = files(
|
||||
// ensure the javadoc process can resolve types compiled from .aj sources
|
||||
project(":spring-aspects").sourceSets.main.output
|
||||
)
|
||||
classpath += files(moduleProjects.collect { it.sourceSets.main.compileClasspath })
|
||||
}
|
||||
|
||||
options {
|
||||
encoding = "UTF-8"
|
||||
memberLevel = JavadocMemberLevel.PROTECTED
|
||||
author = true
|
||||
header = rootProject.description
|
||||
use = true
|
||||
overview = "framework-docs/src/docs/api/overview.html"
|
||||
splitIndex = true
|
||||
links(project.ext.javadocLinks)
|
||||
addBooleanOption('Xdoclint:syntax,reference', true) // only check syntax and reference with doclint
|
||||
addBooleanOption('Werror', true) // fail build on Javadoc warnings
|
||||
}
|
||||
source moduleProjects.collect { project ->
|
||||
project.sourceSets.main.allJava
|
||||
}
|
||||
maxMemory = "1024m"
|
||||
destinationDir = file("$buildDir/docs/javadoc")
|
||||
}
|
||||
|
||||
/**
|
||||
* Produce KDoc for all Spring Framework modules in "build/docs/kdoc"
|
||||
*/
|
||||
rootProject.tasks.dokkaHtmlMultiModule.configure {
|
||||
dependsOn {
|
||||
tasks.getByName("api")
|
||||
}
|
||||
moduleName.set("spring-framework")
|
||||
outputDirectory.set(project.file("$buildDir/docs/kdoc"))
|
||||
}
|
||||
|
||||
/**
|
||||
* Zip all Java docs (javadoc & kdoc) into a single archive
|
||||
*/
|
||||
task docsZip(type: Zip, dependsOn: ['api', rootProject.tasks.dokkaHtmlMultiModule]) {
|
||||
group = "Distribution"
|
||||
description = "Builds -${archiveClassifier} archive containing api and reference " +
|
||||
"for deployment at https://docs.spring.io/spring-framework/docs/."
|
||||
|
||||
archiveBaseName.set("spring-framework")
|
||||
archiveClassifier.set("docs")
|
||||
from("src/dist") {
|
||||
include "changelog.txt"
|
||||
}
|
||||
from (api) {
|
||||
into "javadoc-api"
|
||||
}
|
||||
from (rootProject.tasks.dokkaHtmlMultiModule.outputDirectory) {
|
||||
into "kdoc-api"
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Zip all Spring Framework schemas into a single archive
|
||||
*/
|
||||
task schemaZip(type: Zip) {
|
||||
group = "Distribution"
|
||||
archiveBaseName.set("spring-framework")
|
||||
archiveClassifier.set("schema")
|
||||
description = "Builds -${archiveClassifier} archive containing all " +
|
||||
"XSDs for deployment at https://springframework.org/schema."
|
||||
duplicatesStrategy DuplicatesStrategy.EXCLUDE
|
||||
moduleProjects.each { module ->
|
||||
def Properties schemas = new Properties();
|
||||
|
||||
module.sourceSets.main.resources.find {
|
||||
(it.path.endsWith("META-INF/spring.schemas") || it.path.endsWith("META-INF\\spring.schemas"))
|
||||
}?.withInputStream { schemas.load(it) }
|
||||
|
||||
for (def key : schemas.keySet()) {
|
||||
def shortName = key.replaceAll(/http.*schema.(.*).spring-.*/, '$1')
|
||||
assert shortName != key
|
||||
File xsdFile = module.sourceSets.main.resources.find {
|
||||
(it.path.endsWith(schemas.get(key)) || it.path.endsWith(schemas.get(key).replaceAll('\\/','\\\\')))
|
||||
}
|
||||
assert xsdFile != null
|
||||
into (shortName) {
|
||||
from xsdFile.path
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a distribution zip with everything:
|
||||
* docs, schemas, jars, source jars, javadoc jars
|
||||
*/
|
||||
task distZip(type: Zip, dependsOn: [docsZip, schemaZip]) {
|
||||
group = "Distribution"
|
||||
archiveBaseName.set("spring-framework")
|
||||
archiveClassifier.set("dist")
|
||||
description = "Builds -${archiveClassifier} archive, containing all jars and docs, " +
|
||||
"suitable for community download page."
|
||||
|
||||
ext.baseDir = "spring-framework-${project.version}";
|
||||
|
||||
from("src/docs/dist") {
|
||||
include "readme.txt"
|
||||
include "license.txt"
|
||||
include "notice.txt"
|
||||
into "${baseDir}"
|
||||
expand(copyright: new Date().format("yyyy"), version: project.version)
|
||||
}
|
||||
|
||||
from(zipTree(docsZip.archiveFile)) {
|
||||
into "${baseDir}/docs"
|
||||
}
|
||||
|
||||
from(zipTree(schemaZip.archiveFile)) {
|
||||
into "${baseDir}/schema"
|
||||
}
|
||||
|
||||
moduleProjects.each { module ->
|
||||
into ("${baseDir}/libs") {
|
||||
from module.jar
|
||||
if (module.tasks.findByPath("sourcesJar")) {
|
||||
from module.sourcesJar
|
||||
}
|
||||
if (module.tasks.findByPath("javadocJar")) {
|
||||
from module.javadocJar
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
distZip.mustRunAfter moduleProjects.check
|
||||
|
||||
publishing {
|
||||
publications {
|
||||
mavenJava(MavenPublication) {
|
||||
artifact docsZip
|
||||
artifact schemaZip
|
||||
artifact distZip
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -122,7 +122,6 @@
|
||||
**** xref:testing/testcontext-framework/ctx-management/groovy.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/javaconfig.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/mixed-config.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/context-customizers.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/initializers.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/inheritance.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/env-profiles.adoc[]
|
||||
@@ -131,7 +130,6 @@
|
||||
**** xref:testing/testcontext-framework/ctx-management/web.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/web-mocks.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/caching.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/failure-threshold.adoc[]
|
||||
**** xref:testing/testcontext-framework/ctx-management/hierarchies.adoc[]
|
||||
*** xref:testing/testcontext-framework/fixture-di.adoc[]
|
||||
*** xref:testing/testcontext-framework/web-scoped-beans.adoc[]
|
||||
@@ -167,7 +165,6 @@
|
||||
***** xref:testing/annotations/integration-spring/annotation-contextconfiguration.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-webappconfiguration.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-contexthierarchy.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-contextcustomizerfactories.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-activeprofiles.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-testpropertysource.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-dynamicpropertysource.adoc[]
|
||||
@@ -182,7 +179,6 @@
|
||||
***** xref:testing/annotations/integration-spring/annotation-sqlconfig.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-sqlmergemode.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-sqlgroup.adoc[]
|
||||
***** xref:testing/annotations/integration-spring/annotation-disabledinaotmode.adoc[]
|
||||
**** xref:testing/annotations/integration-junit4.adoc[]
|
||||
**** xref:testing/annotations/integration-junit-jupiter.adoc[]
|
||||
**** xref:testing/annotations/integration-meta.adoc[]
|
||||
@@ -270,7 +266,6 @@
|
||||
***** xref:web/webmvc/mvc-controller/ann-methods/jackson.adoc[]
|
||||
**** xref:web/webmvc/mvc-controller/ann-modelattrib-methods.adoc[]
|
||||
**** xref:web/webmvc/mvc-controller/ann-initbinder.adoc[]
|
||||
**** xref:web/webmvc/mvc-controller/ann-validation.adoc[]
|
||||
**** xref:web/webmvc/mvc-controller/ann-exceptionhandler.adoc[]
|
||||
**** xref:web/webmvc/mvc-controller/ann-advice.adoc[]
|
||||
*** xref:web/webmvc-functional.adoc[]
|
||||
@@ -365,7 +360,6 @@
|
||||
***** xref:web/webflux/controller/ann-methods/jackson.adoc[]
|
||||
**** xref:web/webflux/controller/ann-modelattrib-methods.adoc[]
|
||||
**** xref:web/webflux/controller/ann-initbinder.adoc[]
|
||||
**** xref:web/webflux/controller/ann-validation.adoc[]
|
||||
**** xref:web/webflux/controller/ann-exceptions.adoc[]
|
||||
**** xref:web/webflux/controller/ann-advice.adoc[]
|
||||
*** xref:web/webflux-functional.adoc[]
|
||||
@@ -420,8 +414,6 @@
|
||||
*** xref:integration/cache/plug.adoc[]
|
||||
*** xref:integration/cache/specific-config.adoc[]
|
||||
** xref:integration/observability.adoc[]
|
||||
** xref:integration/checkpoint-restore.adoc[]
|
||||
** xref:integration/cds.adoc[]
|
||||
** xref:integration/appendix.adoc[]
|
||||
* xref:languages.adoc[]
|
||||
** xref:languages/kotlin.adoc[]
|
||||
@@ -439,5 +431,4 @@
|
||||
** xref:languages/groovy.adoc[]
|
||||
** xref:languages/dynamic.adoc[]
|
||||
* xref:appendix.adoc[]
|
||||
* {spring-framework-wiki}[Wiki]
|
||||
|
||||
* https://github.com/spring-projects/spring-framework/wiki[Wiki]
|
||||
|
||||
@@ -8,7 +8,7 @@ within the core Spring Framework.
|
||||
[[appendix-spring-properties]]
|
||||
== Spring Properties
|
||||
|
||||
{spring-framework-api}/core/SpringProperties.html[`SpringProperties`] is a static holder
|
||||
{api-spring-framework}/core/SpringProperties.html[`SpringProperties`] is a static holder
|
||||
for properties that control certain low-level aspects of the Spring Framework. Users can
|
||||
configure these properties via JVM system properties or programmatically via the
|
||||
`SpringProperties.setProperty(String key, String value)` method. The latter may be
|
||||
@@ -19,53 +19,15 @@ of the classpath -- for example, deployed within the application's JAR file.
|
||||
The following table lists all currently supported Spring properties.
|
||||
|
||||
.Supported Spring Properties
|
||||
[cols="1,1"]
|
||||
|===
|
||||
| Name | Description
|
||||
|
||||
| `spring.aot.enabled`
|
||||
| Indicates the application should run with AOT generated artifacts. See
|
||||
xref:core/aot.adoc[Ahead of Time Optimizations] and
|
||||
{spring-framework-api}++/aot/AotDetector.html#AOT_ENABLED++[`AotDetector`]
|
||||
for details.
|
||||
|
||||
| `spring.beaninfo.ignore`
|
||||
| Instructs Spring to use the `Introspector.IGNORE_ALL_BEANINFO` mode when calling the
|
||||
JavaBeans `Introspector`. See
|
||||
{spring-framework-api}++/beans/StandardBeanInfoFactory.html#IGNORE_BEANINFO_PROPERTY_NAME++[`CachedIntrospectionResults`]
|
||||
{api-spring-framework}++/beans/StandardBeanInfoFactory.html#IGNORE_BEANINFO_PROPERTY_NAME++[`CachedIntrospectionResults`]
|
||||
for details.
|
||||
|
||||
| `spring.cache.reactivestreams.ignore`
|
||||
| Instructs Spring's caching infrastructure to ignore the presence of Reactive Streams,
|
||||
in particular Reactor's `Mono`/`Flux` in `@Cacheable` method return type declarations. See
|
||||
{spring-framework-api}++/cache/interceptor/CacheAspectSupport.html#IGNORE_REACTIVESTREAMS_PROPERTY_NAME++[`CacheAspectSupport`]
|
||||
for details.
|
||||
|
||||
| `spring.classformat.ignore`
|
||||
| Instructs Spring to ignore class format exceptions during classpath scanning, in
|
||||
particular for unsupported class file versions. See
|
||||
{spring-framework-api}++/context/annotation/ClassPathScanningCandidateComponentProvider.html#IGNORE_CLASSFORMAT_PROPERTY_NAME++[`ClassPathScanningCandidateComponentProvider`]
|
||||
for details.
|
||||
|
||||
| `spring.context.checkpoint`
|
||||
| Property that specifies a common context checkpoint. See
|
||||
xref:integration/checkpoint-restore.adoc#_automatic_checkpointrestore_at_startup[Automatic
|
||||
checkpoint/restore at startup] and
|
||||
{spring-framework-api}++/context/support/DefaultLifecycleProcessor.html#CHECKPOINT_PROPERTY_NAME++[`DefaultLifecycleProcessor`]
|
||||
for details.
|
||||
|
||||
| `spring.context.exit`
|
||||
| Property for terminating the JVM when the context reaches a specific phase. See
|
||||
xref:integration/checkpoint-restore.adoc#_automatic_checkpointrestore_at_startup[Automatic
|
||||
checkpoint/restore at startup] and
|
||||
{spring-framework-api}++/context/support/DefaultLifecycleProcessor.html#EXIT_PROPERTY_NAME++[`DefaultLifecycleProcessor`]
|
||||
for details.
|
||||
|
||||
| `spring.context.expression.maxLength`
|
||||
| The maximum length for
|
||||
xref:core/expressions/evaluation.adoc#expressions-parser-configuration[Spring Expression Language]
|
||||
expressions used in XML bean definitions, `@Value`, etc.
|
||||
|
||||
| `spring.expression.compiler.mode`
|
||||
| The mode to use when compiling expressions for the
|
||||
xref:core/expressions/evaluation.adoc#expressions-compiler-configuration[Spring Expression Language].
|
||||
@@ -74,9 +36,14 @@ xref:core/expressions/evaluation.adoc#expressions-compiler-configuration[Spring
|
||||
| Instructs Spring to ignore operating system environment variables if a Spring
|
||||
`Environment` property -- for example, a placeholder in a configuration String -- isn't
|
||||
resolvable otherwise. See
|
||||
{spring-framework-api}++/core/env/AbstractEnvironment.html#IGNORE_GETENV_PROPERTY_NAME++[`AbstractEnvironment`]
|
||||
{api-spring-framework}++/core/env/AbstractEnvironment.html#IGNORE_GETENV_PROPERTY_NAME++[`AbstractEnvironment`]
|
||||
for details.
|
||||
|
||||
| `spring.index.ignore`
|
||||
| Instructs Spring to ignore the components index located in
|
||||
`META-INF/spring.components`. See xref:core/beans/classpath-scanning.adoc#beans-scanning-index[Generating an Index of Candidate Components]
|
||||
.
|
||||
|
||||
| `spring.jdbc.getParameterType.ignore`
|
||||
| Instructs Spring to ignore `java.sql.ParameterMetaData.getParameterType` completely.
|
||||
See the note in xref:data-access/jdbc/advanced.adoc#jdbc-batch-list[Batch Operations with a List of Objects].
|
||||
@@ -85,35 +52,27 @@ See the note in xref:data-access/jdbc/advanced.adoc#jdbc-batch-list[Batch Operat
|
||||
| Instructs Spring to ignore a default JNDI environment, as an optimization for scenarios
|
||||
where nothing is ever to be found for such JNDI fallback searches to begin with, avoiding
|
||||
the repeated JNDI lookup overhead. See
|
||||
{spring-framework-api}++/jndi/JndiLocatorDelegate.html#IGNORE_JNDI_PROPERTY_NAME++[`JndiLocatorDelegate`]
|
||||
{api-spring-framework}++/jndi/JndiLocatorDelegate.html#IGNORE_JNDI_PROPERTY_NAME++[`JndiLocatorDelegate`]
|
||||
for details.
|
||||
|
||||
| `spring.objenesis.ignore`
|
||||
| Instructs Spring to ignore Objenesis, not even attempting to use it. See
|
||||
{spring-framework-api}++/objenesis/SpringObjenesis.html#IGNORE_OBJENESIS_PROPERTY_NAME++[`SpringObjenesis`]
|
||||
{api-spring-framework}++/objenesis/SpringObjenesis.html#IGNORE_OBJENESIS_PROPERTY_NAME++[`SpringObjenesis`]
|
||||
for details.
|
||||
|
||||
| `spring.test.aot.processing.failOnError`
|
||||
| A boolean flag that controls whether errors encountered during AOT processing in the
|
||||
_Spring TestContext Framework_ should result in an exception that fails the overall process.
|
||||
See xref:testing/testcontext-framework/aot.adoc[Ahead of Time Support for Tests].
|
||||
|
||||
| `spring.test.constructor.autowire.mode`
|
||||
| The default _test constructor autowire mode_ to use if `@TestConstructor` is not present
|
||||
on a test class. See xref:testing/annotations/integration-junit-jupiter.adoc#integration-testing-annotations-testconstructor[Changing the default test constructor autowire mode].
|
||||
on a test class. See xref:testing/annotations/integration-junit-jupiter.adoc#integration-testing-annotations-testconstructor[Changing the default test constructor autowire mode]
|
||||
.
|
||||
|
||||
| `spring.test.context.cache.maxSize`
|
||||
| The maximum size of the context cache in the _Spring TestContext Framework_. See
|
||||
xref:testing/testcontext-framework/ctx-management/caching.adoc[Context Caching].
|
||||
|
||||
| `spring.test.context.failure.threshold`
|
||||
| The failure threshold for errors encountered while attempting to load an `ApplicationContext`
|
||||
in the _Spring TestContext Framework_. See
|
||||
xref:testing/testcontext-framework/ctx-management/failure-threshold.adoc[Context Failure Threshold].
|
||||
|
||||
| `spring.test.enclosing.configuration`
|
||||
| The default _enclosing configuration inheritance mode_ to use if
|
||||
`@NestedTestConfiguration` is not present on a test class. See
|
||||
xref:testing/annotations/integration-junit-jupiter.adoc#integration-testing-annotations-nestedtestconfiguration[Changing the default enclosing configuration inheritance mode].
|
||||
xref:testing/annotations/integration-junit-jupiter.adoc#integration-testing-annotations-nestedtestconfiguration[Changing the default enclosing configuration inheritance mode]
|
||||
.
|
||||
|
||||
|===
|
||||
|
||||
@@ -0,0 +1,20 @@
|
||||
// Spring Portfolio
|
||||
:docs-site: https://docs.spring.io
|
||||
:docs-spring-boot: {docs-site}/spring-boot/docs/current/reference
|
||||
:docs-spring-gemfire: {docs-site}/spring-gemfire/docs/current/reference
|
||||
:docs-spring-security: {docs-site}/spring-security/reference
|
||||
// spring-asciidoctor-backends Settings
|
||||
:chomp: default headers packages
|
||||
:fold: all
|
||||
// Spring Framework
|
||||
:docs-spring-framework: {docs-site}/spring-framework/docs/{spring-version}
|
||||
:api-spring-framework: {docs-spring-framework}/javadoc-api/org/springframework
|
||||
:docs-java: {docdir}/../../main/java/org/springframework/docs
|
||||
:docs-kotlin: {docdir}/../../main/kotlin/org/springframework/docs
|
||||
:docs-resources: {docdir}/../../main/resources
|
||||
:spring-framework-main-code: https://github.com/spring-projects/spring-framework/tree/main
|
||||
// Third-party Links
|
||||
:docs-graalvm: https://www.graalvm.org/22.3/reference-manual
|
||||
:gh-rsocket: https://github.com/rsocket
|
||||
:gh-rsocket-extensions: {gh-rsocket}/rsocket/blob/master/Extensions
|
||||
:gh-rsocket-java: {gh-rsocket}/rsocket-java
|
||||
@@ -12,5 +12,5 @@ support for new custom advice types be added without changing the core framework
|
||||
The only constraint on a custom `Advice` type is that it must implement the
|
||||
`org.aopalliance.aop.Advice` marker interface.
|
||||
|
||||
See the {spring-framework-api}/aop/framework/adapter/package-summary.html[`org.springframework.aop.framework.adapter`]
|
||||
See the {api-spring-framework}/aop/framework/adapter/package-summary.html[`org.springframework.aop.framework.adapter`]
|
||||
javadoc for further information.
|
||||
|
||||
@@ -291,8 +291,6 @@ to consider:
|
||||
* `final` classes cannot be proxied, because they cannot be extended.
|
||||
* `final` methods cannot be advised, because they cannot be overridden.
|
||||
* `private` methods cannot be advised, because they cannot be overridden.
|
||||
* Methods that are not visible, typically package private methods in a parent class
|
||||
from a different package, cannot be advised because they are effectively private.
|
||||
|
||||
NOTE: There is no need to add CGLIB to your classpath. CGLIB is repackaged and included
|
||||
in the `spring-core` JAR. In other words, CGLIB-based AOP works "out of the box", as do
|
||||
|
||||
@@ -119,7 +119,7 @@ The following listing shows an example configuration:
|
||||
|
||||
Note that the target object (`businessObjectTarget` in the preceding example) must be a
|
||||
prototype. This lets the `PoolingTargetSource` implementation create new instances
|
||||
of the target to grow the pool as necessary. See the {spring-framework-api}/aop/target/AbstractPoolingTargetSource.html[javadoc of
|
||||
of the target to grow the pool as necessary. See the {api-spring-framework}/aop/target/AbstractPoolingTargetSource.html[javadoc of
|
||||
`AbstractPoolingTargetSource`] and the concrete subclass you wish to use for information
|
||||
about its properties. `maxSize` is the most basic and is always guaranteed to be present.
|
||||
|
||||
@@ -221,8 +221,8 @@ NOTE: `ThreadLocal` instances come with serious issues (potentially resulting in
|
||||
incorrectly using them in multi-threaded and multi-classloader environments. You
|
||||
should always consider wrapping a `ThreadLocal` in some other class and never directly use
|
||||
the `ThreadLocal` itself (except in the wrapper class). Also, you should
|
||||
always remember to correctly set and unset (where the latter involves a call to
|
||||
`ThreadLocal.remove()`) the resource local to the thread. Unsetting should be done in
|
||||
always remember to correctly set and unset (where the latter simply involves a call to
|
||||
`ThreadLocal.set(null)`) the resource local to the thread. Unsetting should be done in
|
||||
any case, since not unsetting it might result in problematic behavior. Spring's
|
||||
`ThreadLocal` support does this for you and should always be considered in favor of using
|
||||
`ThreadLocal` instances without other proper handling code.
|
||||
|
||||
@@ -52,7 +52,7 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
See the {spring-framework-api}/aop/aspectj/annotation/AspectJProxyFactory.html[javadoc] for more information.
|
||||
See the {api-spring-framework}/aop/aspectj/annotation/AspectJProxyFactory.html[javadoc] for more information.
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -4,7 +4,7 @@
|
||||
|
||||
@AspectJ refers to a style of declaring aspects as regular Java classes annotated with
|
||||
annotations. The @AspectJ style was introduced by the
|
||||
{aspectj-site}[AspectJ project] as part of the AspectJ 5 release. Spring
|
||||
https://www.eclipse.org/aspectj[AspectJ project] as part of the AspectJ 5 release. Spring
|
||||
interprets the same annotations as AspectJ 5, using a library supplied by AspectJ
|
||||
for pointcut parsing and matching. The AOP runtime is still pure Spring AOP, though, and
|
||||
there is no dependency on the AspectJ compiler or weaver.
|
||||
|
||||
@@ -482,7 +482,7 @@ The `JoinPoint` interface provides a number of useful methods:
|
||||
* `getSignature()`: Returns a description of the method that is being advised.
|
||||
* `toString()`: Prints a useful description of the method being advised.
|
||||
|
||||
See the {aspectj-api}/org/aspectj/lang/JoinPoint.html[javadoc] for more detail.
|
||||
See the https://www.eclipse.org/aspectj/doc/released/runtime-api/org/aspectj/lang/JoinPoint.html[javadoc] for more detail.
|
||||
|
||||
[[aop-ataspectj-advice-params-passing]]
|
||||
=== Passing Parameters to Advice
|
||||
@@ -728,9 +728,14 @@ of determining parameter names, an exception will be thrown.
|
||||
`StandardReflectionParameterNameDiscoverer` :: Uses the standard `java.lang.reflect.Parameter`
|
||||
API to determine parameter names. Requires that code be compiled with the `-parameters`
|
||||
flag for `javac`. Recommended approach on Java 8+.
|
||||
`LocalVariableTableParameterNameDiscoverer` :: Analyzes the local variable table available
|
||||
in the byte code of the advice class to determine parameter names from debug information.
|
||||
Requires that code be compiled with debug symbols (`-g:vars` at a minimum). Deprecated
|
||||
as of Spring Framework 6.0 for removal in Spring Framework 6.1 in favor of compiling
|
||||
code with `-parameters`. Not supported in a GraalVM native image.
|
||||
`AspectJAdviceParameterNameDiscoverer` :: Deduces parameter names from the pointcut
|
||||
expression, `returning`, and `throwing` clauses. See the
|
||||
{spring-framework-api}/aop/aspectj/AspectJAdviceParameterNameDiscoverer.html[javadoc]
|
||||
{api-spring-framework}/aop/aspectj/AspectJAdviceParameterNameDiscoverer.html[javadoc]
|
||||
for details on the algorithm used.
|
||||
|
||||
[[aop-ataspectj-advice-params-names-explicit]]
|
||||
|
||||
@@ -36,9 +36,9 @@ Kotlin::
|
||||
|
||||
The pointcut expression that forms the value of the `@Pointcut` annotation is a regular
|
||||
AspectJ pointcut expression. For a full discussion of AspectJ's pointcut language, see
|
||||
the {aspectj-docs-progguide}/index.html[AspectJ
|
||||
the https://www.eclipse.org/aspectj/doc/released/progguide/index.html[AspectJ
|
||||
Programming Guide] (and, for extensions, the
|
||||
{aspectj-docs}/adk15notebook/index.html[AspectJ 5
|
||||
https://www.eclipse.org/aspectj/doc/released/adk15notebook/index.html[AspectJ 5
|
||||
Developer's Notebook]) or one of the books on AspectJ (such as _Eclipse AspectJ_, by Colyer
|
||||
et al., or _AspectJ in Action_, by Ramnivas Laddad).
|
||||
|
||||
@@ -392,7 +392,7 @@ method that takes no parameters, whereas `(..)` matches any number (zero or more
|
||||
The `({asterisk})` pattern matches a method that takes one parameter of any type.
|
||||
`(*,String)` matches a method that takes two parameters. The first can be of any type, while the
|
||||
second must be a `String`. Consult the
|
||||
{aspectj-docs-progguide}/semantics-pointcuts.html[Language
|
||||
https://www.eclipse.org/aspectj/doc/released/progguide/semantics-pointcuts.html[Language
|
||||
Semantics] section of the AspectJ Programming Guide for more information.
|
||||
|
||||
The following examples show some common pointcut expressions:
|
||||
|
||||
@@ -31,7 +31,7 @@ However, it would be even more confusing if Spring used its own terminology.
|
||||
the "advised object". Since Spring AOP is implemented by using runtime proxies, this
|
||||
object is always a proxied object.
|
||||
* AOP proxy: An object created by the AOP framework in order to implement the aspect
|
||||
contracts (advice method executions and so on). In the Spring Framework, an AOP proxy
|
||||
contracts (advise method executions and so on). In the Spring Framework, an AOP proxy
|
||||
is a JDK dynamic proxy or a CGLIB proxy.
|
||||
* Weaving: linking aspects with other application types or objects to create an
|
||||
advised object. This can be done at compile time (using the AspectJ compiler, for
|
||||
|
||||
@@ -19,10 +19,6 @@ you can do so. However, you should consider the following issues:
|
||||
since the CGLIB proxy instance is created through Objenesis. Only if your JVM does
|
||||
not allow for constructor bypassing, you might see double invocations and
|
||||
corresponding debug log entries from Spring's AOP support.
|
||||
* Your CGLIB proxy usage may face limitations with the JDK 9+ platform module system.
|
||||
As a typical case, you cannot create a CGLIB proxy for a class from the `java.lang`
|
||||
package when deploying on the module path. Such cases require a JVM bootstrap flag
|
||||
`--add-opens=java.base/java.lang=ALL-UNNAMED` which is not available for modules.
|
||||
|
||||
To force the use of CGLIB proxies, set the value of the `proxy-target-class` attribute
|
||||
of the `<aop:config>` element to true, as follows:
|
||||
|
||||
@@ -2,7 +2,7 @@
|
||||
= Further Resources
|
||||
:page-section-summary-toc: 1
|
||||
|
||||
More information on AspectJ can be found on the {aspectj-site}[AspectJ website].
|
||||
More information on AspectJ can be found on the https://www.eclipse.org/aspectj[AspectJ website].
|
||||
|
||||
_Eclipse AspectJ_ by Adrian Colyer et. al. (Addison-Wesley, 2005) provides a
|
||||
comprehensive introduction and reference for the AspectJ language.
|
||||
|
||||
@@ -136,7 +136,7 @@ using Spring in accordance with the properties of the annotation". In this conte
|
||||
"initialization" refers to newly instantiated objects (for example, objects instantiated
|
||||
with the `new` operator) as well as to `Serializable` objects that are undergoing
|
||||
deserialization (for example, through
|
||||
{java-api}/java.base/java/io/Serializable.html[readResolve()]).
|
||||
https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html[readResolve()]).
|
||||
|
||||
[NOTE]
|
||||
=====
|
||||
@@ -168,13 +168,14 @@ Kotlin::
|
||||
|
||||
You can find more information about the language semantics of the various pointcut
|
||||
types in AspectJ
|
||||
{aspectj-docs-progguide}/semantics-joinPoints.html[in this appendix] of the
|
||||
{aspectj-docs-progguide}/index.html[AspectJ Programming Guide].
|
||||
https://www.eclipse.org/aspectj/doc/next/progguide/semantics-joinPoints.html[in this
|
||||
appendix] of the https://www.eclipse.org/aspectj/doc/next/progguide/index.html[AspectJ
|
||||
Programming Guide].
|
||||
=====
|
||||
|
||||
For this to work, the annotated types must be woven with the AspectJ weaver. You can
|
||||
either use a build-time Ant or Maven task to do this (see, for example, the
|
||||
{aspectj-docs-devguide}/antTasks.html[AspectJ Development
|
||||
https://www.eclipse.org/aspectj/doc/released/devguide/antTasks.html[AspectJ Development
|
||||
Environment Guide]) or load-time weaving (see xref:core/aop/using-aspectj.adoc#aop-aj-ltw[Load-time Weaving with AspectJ in the Spring Framework]). The
|
||||
`AnnotationBeanConfigurerAspect` itself needs to be configured by Spring (in order to obtain
|
||||
a reference to the bean factory that is to be used to configure new objects). If you
|
||||
@@ -398,7 +399,7 @@ The focus of this section is on configuring and using LTW in the specific contex
|
||||
Spring Framework. This section is not a general introduction to LTW. For full details on
|
||||
the specifics of LTW and configuring LTW with only AspectJ (with Spring not being
|
||||
involved at all), see the
|
||||
{aspectj-docs-devguide}/ltw.html[LTW section of the AspectJ
|
||||
https://www.eclipse.org/aspectj/doc/released/devguide/ltw.html[LTW section of the AspectJ
|
||||
Development Environment Guide].
|
||||
|
||||
The value that the Spring Framework brings to AspectJ LTW is in enabling much
|
||||
@@ -420,7 +421,7 @@ who typically are in charge of the deployment configuration, such as the launch
|
||||
Now that the sales pitch is over, let us first walk through a quick example of AspectJ
|
||||
LTW that uses Spring, followed by detailed specifics about elements introduced in the
|
||||
example. For a complete example, see the
|
||||
{spring-github-org}/spring-petclinic[Petclinic sample application].
|
||||
https://github.com/spring-projects/spring-petclinic[Petclinic sample application].
|
||||
|
||||
|
||||
[[aop-aj-ltw-first-example]]
|
||||
@@ -521,8 +522,8 @@ standard AspectJ. The following example shows the `aop.xml` file:
|
||||
<aspectj>
|
||||
|
||||
<weaver>
|
||||
<!-- only weave classes in our application-specific packages and sub-packages -->
|
||||
<include within="com.xyz..*"/>
|
||||
<!-- only weave classes in our application-specific packages -->
|
||||
<include within="com.xyz.*"/>
|
||||
</weaver>
|
||||
|
||||
<aspects>
|
||||
@@ -533,11 +534,6 @@ standard AspectJ. The following example shows the `aop.xml` file:
|
||||
</aspectj>
|
||||
----
|
||||
|
||||
NOTE: It is recommended to only weave specific classes (typically those in the
|
||||
application packages, as shown in the `aop.xml` example above) in order
|
||||
to avoid side effects such as AspectJ dump files and warnings.
|
||||
This is also a best practice from an efficiency perspective.
|
||||
|
||||
Now we can move on to the Spring-specific portion of the configuration. We need
|
||||
to configure a `LoadTimeWeaver` (explained later). This load-time weaver is the
|
||||
essential component responsible for weaving the aspect configuration in one or
|
||||
@@ -625,7 +621,7 @@ java -javaagent:C:/projects/xyz/lib/spring-instrument.jar com.xyz.Main
|
||||
----
|
||||
|
||||
The `-javaagent` is a flag for specifying and enabling
|
||||
{java-api}/java.instrument/java/lang/instrument/package-summary.html[agents
|
||||
https://docs.oracle.com/javase/8/docs/api/java/lang/instrument/package-summary.html[agents
|
||||
to instrument programs that run on the JVM]. The Spring Framework ships with such an
|
||||
agent, the `InstrumentationSavingAgent`, which is packaged in the
|
||||
`spring-instrument.jar` that was supplied as the value of the `-javaagent` argument in
|
||||
@@ -719,32 +715,13 @@ Furthermore, the compiled aspect classes need to be available on the classpath.
|
||||
|
||||
|
||||
[[aop-aj-ltw-aop_dot_xml]]
|
||||
=== `META-INF/aop.xml`
|
||||
=== 'META-INF/aop.xml'
|
||||
|
||||
The AspectJ LTW infrastructure is configured by using one or more `META-INF/aop.xml`
|
||||
files that are on the Java classpath (either directly or, more typically, in jar files).
|
||||
For example:
|
||||
|
||||
[source,xml,indent=0,subs="verbatim"]
|
||||
----
|
||||
<!DOCTYPE aspectj PUBLIC "-//AspectJ//DTD//EN" "https://www.eclipse.org/aspectj/dtd/aspectj.dtd">
|
||||
<aspectj>
|
||||
|
||||
<weaver>
|
||||
<!-- only weave classes in our application-specific packages and sub-packages -->
|
||||
<include within="com.xyz..*"/>
|
||||
</weaver>
|
||||
|
||||
</aspectj>
|
||||
----
|
||||
|
||||
NOTE: It is recommended to only weave specific classes (typically those in the
|
||||
application packages, as shown in the `aop.xml` example above) in order
|
||||
to avoid side effects such as AspectJ dump files and warnings.
|
||||
This is also a best practice from an efficiency perspective.
|
||||
|
||||
The structure and contents of this file is detailed in the LTW part of the
|
||||
{aspectj-docs-devguide}/ltw-configuration.html[AspectJ reference
|
||||
https://www.eclipse.org/aspectj/doc/released/devguide/ltw-configuration.html[AspectJ reference
|
||||
documentation]. Because the `aop.xml` file is 100% AspectJ, we do not describe it further here.
|
||||
|
||||
|
||||
|
||||
@@ -15,13 +15,10 @@ Applying such optimizations early implies the following restrictions:
|
||||
|
||||
* The classpath is fixed and fully defined at build time.
|
||||
* The beans defined in your application cannot change at runtime, meaning:
|
||||
** `@Profile`, in particular profile-specific configuration, needs to be chosen at build time and is automatically enabled at runtime when AOT is enabled.
|
||||
** `@Profile`, in particular profile-specific configuration needs to be chosen at build time.
|
||||
** `Environment` properties that impact the presence of a bean (`@Conditional`) are only considered at build time.
|
||||
* Bean definitions with instance suppliers (lambdas or method references) cannot be transformed ahead-of-time.
|
||||
* Beans registered as singletons (using `registerSingleton`, typically from
|
||||
`ConfigurableListableBeanFactory`) cannot be transformed ahead-of-time either.
|
||||
* As we cannot rely on the instance, make sure that the bean type is as precise as
|
||||
possible.
|
||||
* Bean definitions with instance suppliers (lambdas or method references) cannot be transformed ahead-of-time (see related https://github.com/spring-projects/spring-framework/issues/29555[spring-framework#29555] issue).
|
||||
* Make sure that the bean type is as precise as possible.
|
||||
|
||||
TIP: See also the xref:core/aot.adoc#aot.bestpractices[] section.
|
||||
|
||||
@@ -30,7 +27,7 @@ A Spring AOT processed application typically generates:
|
||||
|
||||
* Java source code
|
||||
* Bytecode (usually for dynamic proxies)
|
||||
* {spring-framework-api}/aot/hint/RuntimeHints.html[`RuntimeHints`] for the use of reflection, resource loading, serialization, and JDK proxies
|
||||
* {api-spring-framework}/aot/hint/RuntimeHints.html[`RuntimeHints`] for the use of reflection, resource loading, serialization, and JDK proxies.
|
||||
|
||||
NOTE: At the moment, AOT is focused on allowing Spring applications to be deployed as native images using GraalVM.
|
||||
We intend to support more JVM-based use cases in future generations.
|
||||
@@ -38,7 +35,7 @@ We intend to support more JVM-based use cases in future generations.
|
||||
[[aot.basics]]
|
||||
== AOT engine overview
|
||||
|
||||
The entry point of the AOT engine for processing an `ApplicationContext` is `ApplicationContextAotGenerator`. It takes care of the following steps, based on a `GenericApplicationContext` that represents the application to optimize and a {spring-framework-api}/aot/generate/GenerationContext.html[`GenerationContext`]:
|
||||
The entry point of the AOT engine for processing an `ApplicationContext` arrangement is `ApplicationContextAotGenerator`. It takes care of the following steps, based on a `GenericApplicationContext` that represents the application to optimize and a {api-spring-framework}/aot/generate/GenerationContext.html[`GenerationContext`]:
|
||||
|
||||
* Refresh an `ApplicationContext` for AOT processing. Contrary to a traditional refresh, this version only creates bean definitions, not bean instances.
|
||||
* Invoke the available `BeanFactoryInitializationAotProcessor` implementations and apply their contributions against the `GenerationContext`.
|
||||
@@ -70,14 +67,7 @@ include-code::./AotProcessingSample[tag=aotcontext]
|
||||
In this mode, xref:core/beans/factory-extension.adoc#beans-factory-extension-factory-postprocessors[`BeanFactoryPostProcessor` implementations] are invoked as usual.
|
||||
This includes configuration class parsing, import selectors, classpath scanning, etc.
|
||||
Such steps make sure that the `BeanRegistry` contains the relevant bean definitions for the application.
|
||||
If bean definitions are guarded by conditions (such as `@Profile`), these are evaluated,
|
||||
and bean definitions that don't match their conditions are discarded at this stage.
|
||||
|
||||
If custom code needs to register extra beans programmatically, make sure that custom
|
||||
registration code uses `BeanDefinitionRegistry` instead of `BeanFactory` as only bean
|
||||
definitions are taken into account. A good pattern is to implement
|
||||
`ImportBeanDefinitionRegistrar` and register it via an `@Import` on one of your
|
||||
configuration classes.
|
||||
If bean definitions are guarded by conditions (such as `@Profile`), these are discarded at this stage.
|
||||
|
||||
Because this mode does not actually create bean instances, `BeanPostProcessor` implementations are not invoked, except for specific variants that are relevant for AOT processing.
|
||||
These are:
|
||||
@@ -91,15 +81,15 @@ Once this part completes, the `BeanFactory` contains the bean definitions that a
|
||||
[[aot.bean-factory-initialization-contributions]]
|
||||
== Bean Factory Initialization AOT Contributions
|
||||
|
||||
Components that want to participate in this step can implement the {spring-framework-api}/beans/factory/aot/BeanFactoryInitializationAotProcessor.html[`BeanFactoryInitializationAotProcessor`] interface.
|
||||
Components that want to participate in this step can implement the {api-spring-framework}/beans/factory/aot/BeanFactoryInitializationAotProcessor.html[`BeanFactoryInitializationAotProcessor`] interface.
|
||||
Each implementation can return an AOT contribution, based on the state of the bean factory.
|
||||
|
||||
An AOT contribution is a component that contributes generated code which reproduces a particular behavior.
|
||||
An AOT contribution is a component that contributes generated code that reproduces a particular behavior.
|
||||
It can also contribute `RuntimeHints` to indicate the need for reflection, resource loading, serialization, or JDK proxies.
|
||||
|
||||
A `BeanFactoryInitializationAotProcessor` implementation can be registered in `META-INF/spring/aot.factories` with a key equal to the fully-qualified name of the interface.
|
||||
A `BeanFactoryInitializationAotProcessor` implementation can be registered in `META-INF/spring/aot.factories` with a key equal to the fully qualified name of the interface.
|
||||
|
||||
The `BeanFactoryInitializationAotProcessor` interface can also be implemented directly by a bean.
|
||||
A `BeanFactoryInitializationAotProcessor` can also be implemented directly by a bean.
|
||||
In this mode, the bean provides an AOT contribution equivalent to the feature it provides with a regular runtime.
|
||||
Consequently, such a bean is automatically excluded from the AOT-optimized context.
|
||||
|
||||
@@ -121,7 +111,7 @@ This interface is used as follows:
|
||||
|
||||
* Implemented by a `BeanPostProcessor` bean, to replace its runtime behavior.
|
||||
For instance xref:core/beans/factory-extension.adoc#beans-factory-extension-bpp-examples-aabpp[`AutowiredAnnotationBeanPostProcessor`] implements this interface to generate code that injects members annotated with `@Autowired`.
|
||||
* Implemented by a type registered in `META-INF/spring/aot.factories` with a key equal to the fully-qualified name of the interface.
|
||||
* Implemented by a type registered in `META-INF/spring/aot.factories` with a key equal to the fully qualified name of the interface.
|
||||
Typically used when the bean definition needs to be tuned for specific features of the core framework.
|
||||
|
||||
[NOTE]
|
||||
@@ -152,23 +142,8 @@ Java::
|
||||
|
||||
}
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
@Configuration(proxyBeanMethods = false)
|
||||
class DataSourceConfiguration {
|
||||
|
||||
@Bean
|
||||
fun dataSource() = SimpleDataSource()
|
||||
|
||||
}
|
||||
----
|
||||
======
|
||||
|
||||
WARNING: Kotlin class names with backticks that use invalid Java identifiers (not starting with a letter, containing spaces, etc.) are not supported.
|
||||
|
||||
Since there isn't any particular condition on this class, `dataSourceConfiguration` and `dataSource` are identified as candidates.
|
||||
The AOT engine will convert the configuration class above to code similar to the following:
|
||||
|
||||
@@ -181,7 +156,6 @@ Java::
|
||||
/**
|
||||
* Bean definitions for {@link DataSourceConfiguration}
|
||||
*/
|
||||
@Generated
|
||||
public class DataSourceConfiguration__BeanDefinitions {
|
||||
/**
|
||||
* Get the bean definition for 'dataSourceConfiguration'
|
||||
@@ -216,25 +190,11 @@ Java::
|
||||
|
||||
NOTE: The exact code generated may differ depending on the exact nature of your bean definitions.
|
||||
|
||||
TIP: Each generated class is annotated with `org.springframework.aot.generate.Generated` to
|
||||
identify them if they need to be excluded, for instance by static analysis tools.
|
||||
|
||||
The generated code above creates bean definitions equivalent to the `@Configuration` class, but in a direct way and without the use of reflection if at all possible.
|
||||
There is a bean definition for `dataSourceConfiguration` and one for `dataSourceBean`.
|
||||
When a `datasource` instance is required, a `BeanInstanceSupplier` is called.
|
||||
This supplier invokes the `dataSource()` method on the `dataSourceConfiguration` bean.
|
||||
|
||||
[[aot.running]]
|
||||
== Running with AOT optimizations
|
||||
|
||||
AOT is a mandatory step to transform a Spring application to a native executable, so it
|
||||
is automatically enabled when running in this mode. It is possible to use those optimizations
|
||||
on the JVM by setting the `spring.aot.enabled` System property to `true`.
|
||||
|
||||
NOTE: When AOT optimizations are included, some decisions that have been taken at build-time
|
||||
are hard-coded in the application setup. For instance, profiles that have been enabled at
|
||||
build-time are automatically enabled at runtime as well.
|
||||
|
||||
[[aot.bestpractices]]
|
||||
== Best Practices
|
||||
|
||||
@@ -243,33 +203,11 @@ However, keep in mind that some optimizations are made at build time based on a
|
||||
|
||||
This section lists the best practices that make sure your application is ready for AOT.
|
||||
|
||||
[[aot.bestpractices.bean-registration]]
|
||||
== Programmatic bean registration
|
||||
|
||||
The AOT engine takes care of the `@Configuration` model and any callback that might be
|
||||
invoked as part of processing your configuration. If you need to register additional
|
||||
beans programmatically, make sure to use a `BeanDefinitionRegistry` to register
|
||||
bean definitions.
|
||||
|
||||
This can typically be done via a `BeanDefinitionRegistryPostProcessor`. Note that, if it
|
||||
is registered itself as a bean, it will be invoked again at runtime unless you make
|
||||
sure to implement `BeanFactoryInitializationAotProcessor` as well. A more idiomatic
|
||||
way is to implement `ImportBeanDefinitionRegistrar` and register it using `@Import` on
|
||||
one of your configuration classes. This invokes your custom code as part of configuration
|
||||
class parsing.
|
||||
|
||||
If you declare additional beans programmatically using a different callback, they are
|
||||
likely not going to be handled by the AOT engine, and therefore no hints are going to be
|
||||
generated for them. Depending on the environment, those beans may not be registered at
|
||||
all. For instance, classpath scanning does not work in a native image as there is no
|
||||
notion of a classpath. For cases like this, it is crucial that the scanning happens at
|
||||
build time.
|
||||
|
||||
[[aot.bestpractices.bean-type]]
|
||||
=== Expose The Most Precise Bean Type
|
||||
|
||||
While your application may interact with an interface that a bean implements, it is still very important to declare the most precise type.
|
||||
The AOT engine performs additional checks on the bean type, such as detecting the presence of `@Autowired` members or lifecycle callback methods.
|
||||
The AOT engine performs additional checks on the bean type, such as detecting the presence of `@Autowired` members, or lifecycle callback methods.
|
||||
|
||||
For `@Configuration` classes, make sure that the return type of the factory `@Bean` method is as precise as possible.
|
||||
Consider the following example:
|
||||
@@ -318,40 +256,6 @@ Java::
|
||||
|
||||
If you are registering bean definitions programmatically, consider using `RootBeanBefinition` as it allows to specify a `ResolvableType` that handles generics.
|
||||
|
||||
[[aot.bestpractices.constructors]]
|
||||
=== Avoid Multiple Constructors
|
||||
|
||||
The container is able to choose the most appropriate constructor to use based on several candidates.
|
||||
However, this is not a best practice and flagging the preferred constructor with `@Autowired` if necessary is preferred.
|
||||
|
||||
In case you are working on a code base that you cannot modify, you can set the {spring-framework-api}/beans/factory/support/AbstractBeanDefinition.html#PREFERRED_CONSTRUCTORS_ATTRIBUTE[`preferredConstructors` attribute] on the related bean definition to indicate which constructor should be used.
|
||||
|
||||
[[aot.bestpractices.comlext-data-structure]]
|
||||
=== Avoid Complex Data Structure for Constructor Parameters and Properties
|
||||
|
||||
When crafting a `RootBeanDefinition` programmatically, you are not constrained in terms of types that you can use.
|
||||
For instance, you may have a custom `record` with several properties that your bean takes as a constructor argument.
|
||||
|
||||
While this works fine with the regular runtime, AOT does not know how to generate the code of your custom data structure.
|
||||
A good rule of thumb is to keep in mind that bean definitions are an abstraction on top of several models.
|
||||
Rather than using such structure, decomposing to simple types or referring to a bean that is built as such is recommended.
|
||||
|
||||
As a last resort, you can implement your own `org.springframework.aot.generate.ValueCodeGenerator$Delegate`.
|
||||
To use it, register its fully qualified name in `META-INF/spring/aot.factories` using the `Delegate` as the key.
|
||||
|
||||
[[aot.bestpractices.custom-arguments]]
|
||||
=== Avoid Creating Bean with Custom Arguments
|
||||
|
||||
Spring AOT detects what needs to be done to create a bean and translates that in generated code using an instance supplier.
|
||||
The container also supports creating a bean with {spring-framework-api}++/beans/factory/BeanFactory.html#getBean(java.lang.String,java.lang.Object...)++[custom arguments] that leads to several issues with AOT:
|
||||
|
||||
. The custom arguments require dynamic introspection of a matching constructor or factory method.
|
||||
Those arguments cannot be detected by AOT, so the necessary reflection hints will have to be provided manually.
|
||||
. By-passing the instance supplier means that all other optimizations after creation are skipped as well.
|
||||
For instance, autowiring on fields and methods will be skipped as they are handled in the instance supplier.
|
||||
|
||||
Rather than having prototype-scoped beans created with custom arguments, we recommend a manual factory pattern where a bean is responsible for the creation of the instance.
|
||||
|
||||
[[aot.bestpractices.factory-bean]]
|
||||
=== FactoryBean
|
||||
|
||||
@@ -368,7 +272,7 @@ Java::
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
public class ClientFactoryBean<T extends AbstractClient> implements FactoryBean<T> {
|
||||
// ...
|
||||
|
||||
}
|
||||
----
|
||||
======
|
||||
@@ -465,10 +369,10 @@ Java::
|
||||
|
||||
Running an application as a native image requires additional information compared to a regular JVM runtime.
|
||||
For instance, GraalVM needs to know ahead of time if a component uses reflection.
|
||||
Similarly, classpath resources are not included in a native image unless specified explicitly.
|
||||
Similarly, classpath resources are not shipped in a native image unless specified explicitly.
|
||||
Consequently, if the application needs to load a resource, it must be referenced from the corresponding GraalVM native image configuration file.
|
||||
|
||||
The {spring-framework-api}/aot/hint/RuntimeHints.html[`RuntimeHints`] API collects the need for reflection, resource loading, serialization, and JDK proxies at runtime.
|
||||
The {api-spring-framework}/aot/hint/RuntimeHints.html[`RuntimeHints`] API collects the need for reflection, resource loading, serialization, and JDK proxies at runtime.
|
||||
The following example makes sure that `config/app.properties` can be loaded from the classpath at runtime within a native image:
|
||||
|
||||
[tabs]
|
||||
@@ -500,16 +404,16 @@ include-code::./SpellCheckService[]
|
||||
If at all possible, `@ImportRuntimeHints` should be used as close as possible to the component that requires the hints.
|
||||
This way, if the component is not contributed to the `BeanFactory`, the hints won't be contributed either.
|
||||
|
||||
It is also possible to register an implementation statically by adding an entry in `META-INF/spring/aot.factories` with a key equal to the fully-qualified name of the `RuntimeHintsRegistrar` interface.
|
||||
It is also possible to register an implementation statically by adding an entry in `META-INF/spring/aot.factories` with a key equal to the fully qualified name of the `RuntimeHintsRegistrar` interface.
|
||||
|
||||
|
||||
[[aot.hints.reflective]]
|
||||
=== `@Reflective`
|
||||
|
||||
{spring-framework-api}/aot/hint/annotation/Reflective.html[`@Reflective`] provides an idiomatic way to flag the need for reflection on an annotated element.
|
||||
{api-spring-framework}/aot/hint/annotation/Reflective.html[`@Reflective`] provides an idiomatic way to flag the need for reflection on an annotated element.
|
||||
For instance, `@EventListener` is meta-annotated with `@Reflective` since the underlying implementation invokes the annotated method using reflection.
|
||||
|
||||
By default, only Spring beans are considered, and an invocation hint is registered for the annotated element.
|
||||
By default, only Spring beans are considered and an invocation hint is registered for the annotated element.
|
||||
This can be tuned by specifying a custom `ReflectiveProcessor` implementation via the
|
||||
`@Reflective` annotation.
|
||||
|
||||
@@ -520,7 +424,7 @@ If components other than Spring beans need to be processed, a `BeanFactoryInitia
|
||||
[[aot.hints.register-reflection-for-binding]]
|
||||
=== `@RegisterReflectionForBinding`
|
||||
|
||||
{spring-framework-api}/aot/hint/annotation/RegisterReflectionForBinding.html[`@RegisterReflectionForBinding`] is a specialization of `@Reflective` that registers the need for serializing arbitrary types.
|
||||
{api-spring-framework}/aot/hint/annotation/RegisterReflectionForBinding.html[`@RegisterReflectionForBinding`] is a specialization of `@Reflective` that registers the need for serializing arbitrary types.
|
||||
A typical use case is the use of DTOs that the container cannot infer, such as using a web client within a method body.
|
||||
|
||||
`@RegisterReflectionForBinding` can be applied to any Spring bean at the class level, but it can also be applied directly to a method, field, or constructor to better indicate where the hints are actually required.
|
||||
@@ -556,7 +460,7 @@ include-code::./SpellCheckServiceTests[tag=hintspredicates]
|
||||
With `RuntimeHintsPredicates`, we can check for reflection, resource, serialization, or proxy generation hints.
|
||||
This approach works well for unit tests but implies that the runtime behavior of a component is well known.
|
||||
|
||||
You can learn more about the global runtime behavior of an application by running its test suite (or the app itself) with the {graalvm-docs}/native-image/metadata/AutomaticMetadataCollection/[GraalVM tracing agent].
|
||||
You can learn more about the global runtime behavior of an application by running its test suite (or the app itself) with the {docs-graalvm}/native-image/metadata/AutomaticMetadataCollection/[GraalVM tracing agent].
|
||||
This agent will record all relevant calls requiring GraalVM hints at runtime and write them out as JSON configuration files.
|
||||
|
||||
For more targeted discovery and testing, Spring Framework ships a dedicated module with core AOT testing utilities, `"org.springframework:spring-core-test"`.
|
||||
@@ -588,4 +492,4 @@ io.spring.runtimehintstesting.SampleReflectionRuntimeHintsTests#lambda$shouldReg
|
||||
|
||||
There are various ways to configure this Java agent in your build, so please refer to the documentation of your build tool and test execution plugin.
|
||||
The agent itself can be configured to instrument specific packages (by default, only `org.springframework` is instrumented).
|
||||
You'll find more details in the {spring-framework-code}/buildSrc/README.md[Spring Framework `buildSrc` README] file.
|
||||
You'll find more details in the {spring-framework-main-code}/buildSrc/README.md[Spring Framework `buildSrc` README] file.
|
||||
|
||||
@@ -765,7 +765,7 @@ want to add an additional attribute to the existing bean definition element.
|
||||
|
||||
By way of another example, suppose that you define a bean definition for a
|
||||
service object that (unknown to it) accesses a clustered
|
||||
{JSR}107[JCache], and you want to ensure that the
|
||||
https://jcp.org/en/jsr/detail?id=107[JCache], and you want to ensure that the
|
||||
named JCache instance is eagerly started within the surrounding cluster.
|
||||
The following listing shows such a definition:
|
||||
|
||||
|
||||
@@ -66,13 +66,13 @@ developer's intent ("`inject this constant value`"), and it reads better:
|
||||
[[xsd-schemas-util-frfb]]
|
||||
==== Setting a Bean Property or Constructor Argument from a Field Value
|
||||
|
||||
{spring-framework-api}/beans/factory/config/FieldRetrievingFactoryBean.html[`FieldRetrievingFactoryBean`]
|
||||
{api-spring-framework}/beans/factory/config/FieldRetrievingFactoryBean.html[`FieldRetrievingFactoryBean`]
|
||||
is a `FactoryBean` that retrieves a `static` or non-static field value. It is typically
|
||||
used for retrieving `public` `static` `final` constants, which may then be used to set a
|
||||
property value or constructor argument for another bean.
|
||||
|
||||
The following example shows how a `static` field is exposed, by using the
|
||||
{spring-framework-api}/beans/factory/config/FieldRetrievingFactoryBean.html#setStaticField(java.lang.String)[`staticField`]
|
||||
{api-spring-framework}/beans/factory/config/FieldRetrievingFactoryBean.html#setStaticField(java.lang.String)[`staticField`]
|
||||
property:
|
||||
|
||||
[source,xml,indent=0,subs="verbatim,quotes"]
|
||||
@@ -109,7 +109,7 @@ to be specified for the bean reference, as the following example shows:
|
||||
|
||||
You can also access a non-static (instance) field of another bean, as
|
||||
described in the API documentation for the
|
||||
{spring-framework-api}/beans/factory/config/FieldRetrievingFactoryBean.html[`FieldRetrievingFactoryBean`]
|
||||
{api-spring-framework}/beans/factory/config/FieldRetrievingFactoryBean.html[`FieldRetrievingFactoryBean`]
|
||||
class.
|
||||
|
||||
Injecting enumeration values into beans as either property or constructor arguments is
|
||||
|
||||
@@ -1,16 +1,33 @@
|
||||
[[beans-annotation-config]]
|
||||
= Annotation-based Container Configuration
|
||||
|
||||
Spring provides comprehensive support for annotation-based configuration, operating on
|
||||
metadata in the component class itself by using annotations on the relevant class,
|
||||
method, or field declaration. As mentioned in
|
||||
xref:core/beans/factory-extension.adoc#beans-factory-extension-bpp-examples-aabpp[Example: The `AutowiredAnnotationBeanPostProcessor`],
|
||||
Spring uses `BeanPostProcessors` in conjunction with annotations to make the core IOC
|
||||
container aware of specific annotations.
|
||||
.Are annotations better than XML for configuring Spring?
|
||||
****
|
||||
The introduction of annotation-based configuration raised the question of whether this
|
||||
approach is "`better`" than XML. The short answer is "`it depends.`" The long answer is
|
||||
that each approach has its pros and cons, and, usually, it is up to the developer to
|
||||
decide which strategy suits them better. Due to the way they are defined, annotations
|
||||
provide a lot of context in their declaration, leading to shorter and more concise
|
||||
configuration. However, XML excels at wiring up components without touching their source
|
||||
code or recompiling them. Some developers prefer having the wiring close to the source
|
||||
while others argue that annotated classes are no longer POJOs and, furthermore, that the
|
||||
configuration becomes decentralized and harder to control.
|
||||
|
||||
For example, the xref:core/beans/annotation-config/autowired.adoc[`@Autowired`]
|
||||
annotation provides the same capabilities as described in
|
||||
xref:core/beans/dependencies/factory-autowire.adoc[Autowiring Collaborators] but
|
||||
No matter the choice, Spring can accommodate both styles and even mix them together.
|
||||
It is worth pointing out that through its xref:core/beans/java.adoc[JavaConfig] option, Spring lets
|
||||
annotations be used in a non-invasive way, without touching the target components'
|
||||
source code and that, in terms of tooling, all configuration styles are supported by
|
||||
https://spring.io/tools[Spring Tools] for Eclipse, Visual Studio Code, and Theia.
|
||||
****
|
||||
|
||||
An alternative to XML setup is provided by annotation-based configuration, which relies
|
||||
on bytecode metadata for wiring up components instead of XML declarations. Instead of
|
||||
using XML to describe a bean wiring, the developer moves the configuration into the
|
||||
component class itself by using annotations on the relevant class, method, or field
|
||||
declaration. As mentioned in xref:core/beans/factory-extension.adoc#beans-factory-extension-bpp-examples-aabpp[Example: The `AutowiredAnnotationBeanPostProcessor`], using a
|
||||
`BeanPostProcessor` in conjunction with annotations is a common means of extending the
|
||||
Spring IoC container. For example, the xref:core/beans/annotation-config/autowired.adoc[`@Autowired`]
|
||||
annotation provides the same capabilities as described in xref:core/beans/dependencies/factory-autowire.adoc[Autowiring Collaborators] but
|
||||
with more fine-grained control and wider applicability. In addition, Spring provides
|
||||
support for JSR-250 annotations, such as `@PostConstruct` and `@PreDestroy`, as well as
|
||||
support for JSR-330 (Dependency Injection for Java) annotations contained in the
|
||||
@@ -19,16 +36,13 @@ can be found in the xref:core/beans/standard-annotations.adoc[relevant section].
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
Annotation injection is performed before external property injection. Thus, external
|
||||
configuration (e.g. XML-specified bean properties) effectively overrides the annotations
|
||||
for properties when wired through mixed approaches.
|
||||
Annotation injection is performed before XML injection. Thus, the XML configuration
|
||||
overrides the annotations for properties wired through both approaches.
|
||||
====
|
||||
|
||||
Technically, you can register the post-processors as individual bean definitions, but they
|
||||
are implicitly registered in an `AnnotationConfigApplicationContext` already.
|
||||
|
||||
In an XML-based Spring setup, you may include the following configuration tag to enable
|
||||
mixing and matching with annotation-based configuration:
|
||||
As always, you can register the post-processors as individual bean definitions, but they
|
||||
can also be implicitly registered by including the following tag in an XML-based Spring
|
||||
configuration (notice the inclusion of the `context` namespace):
|
||||
|
||||
[source,xml,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
@@ -48,11 +62,11 @@ mixing and matching with annotation-based configuration:
|
||||
|
||||
The `<context:annotation-config/>` element implicitly registers the following post-processors:
|
||||
|
||||
* {spring-framework-api}/context/annotation/ConfigurationClassPostProcessor.html[`ConfigurationClassPostProcessor`]
|
||||
* {spring-framework-api}/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.html[`AutowiredAnnotationBeanPostProcessor`]
|
||||
* {spring-framework-api}/context/annotation/CommonAnnotationBeanPostProcessor.html[`CommonAnnotationBeanPostProcessor`]
|
||||
* {spring-framework-api}/orm/jpa/support/PersistenceAnnotationBeanPostProcessor.html[`PersistenceAnnotationBeanPostProcessor`]
|
||||
* {spring-framework-api}/context/event/EventListenerMethodProcessor.html[`EventListenerMethodProcessor`]
|
||||
* {api-spring-framework}/context/annotation/ConfigurationClassPostProcessor.html[`ConfigurationClassPostProcessor`]
|
||||
* {api-spring-framework}/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.html[`AutowiredAnnotationBeanPostProcessor`]
|
||||
* {api-spring-framework}/context/annotation/CommonAnnotationBeanPostProcessor.html[`CommonAnnotationBeanPostProcessor`]
|
||||
* {api-spring-framework}/orm/jpa/support/PersistenceAnnotationBeanPostProcessor.html[`PersistenceAnnotationBeanPostProcessor`]
|
||||
* {api-spring-framework}/context/event/EventListenerMethodProcessor.html[`EventListenerMethodProcessor`]
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
|
||||
+2
-1
@@ -156,7 +156,8 @@ for a non-unique dependency situation, Spring matches the injection point name
|
||||
(that is, the field name or parameter name) against the target bean names and chooses
|
||||
the same-named candidate, if any (either by bean name or by associated alias).
|
||||
|
||||
Since version 6.1, this requires the `-parameters` Java compiler flag to be present.
|
||||
This requires the `-parameters` Java compiler flag to be present. As a fallback,
|
||||
version 6.0 still supports parameter names from debug symbols via `-debug` as well.
|
||||
====
|
||||
|
||||
As an alternative for injection by name, consider the JSR-250 `@Resource` annotation
|
||||
|
||||
@@ -186,15 +186,6 @@ implementation type, consider declaring the most specific return type on your fa
|
||||
method (at least as specific as required by the injection points referring to your bean).
|
||||
====
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
As of 4.3, `@Autowired` also considers self references for injection (that is, references
|
||||
back to the bean that is currently injected). Note that self injection is a fallback.
|
||||
In practice, you should use self references as a last resort only (for example, for
|
||||
calling other methods on the same instance through the bean's transactional proxy).
|
||||
Consider factoring out the affected methods to a separate delegate bean in such a scenario.
|
||||
====
|
||||
|
||||
You can also instruct Spring to provide all beans of a particular type from the
|
||||
`ApplicationContext` by adding the `@Autowired` annotation to a field or method that
|
||||
expects an array of that type, as the following example shows:
|
||||
@@ -277,12 +268,6 @@ use the same bean class). `@Order` values may influence priorities at injection
|
||||
but be aware that they do not influence singleton startup order, which is an
|
||||
orthogonal concern determined by dependency relationships and `@DependsOn` declarations.
|
||||
|
||||
Note that `@Order` annotations on configuration classes just influence the evaluation
|
||||
order within the overall set of configuration classes on startup. Such configuration-level
|
||||
order values do not affect the contained `@Bean` methods at all. For bean-level ordering,
|
||||
each `@Bean` method needs to have its own `@Order` annotation which applies within a
|
||||
set of multiple matches for the specific bean type (as returned by the factory method).
|
||||
|
||||
Note that the standard `jakarta.annotation.Priority` annotation is not available at the
|
||||
`@Bean` level, since it cannot be declared on methods. Its semantics can be modeled
|
||||
through `@Order` values in combination with `@Primary` on a single bean for each type.
|
||||
|
||||
+1
-1
@@ -1,7 +1,7 @@
|
||||
[[beans-custom-autowire-configurer]]
|
||||
= Using `CustomAutowireConfigurer`
|
||||
|
||||
{spring-framework-api}/beans/factory/annotation/CustomAutowireConfigurer.html[`CustomAutowireConfigurer`]
|
||||
{api-spring-framework}/beans/factory/annotation/CustomAutowireConfigurer.html[`CustomAutowireConfigurer`]
|
||||
is a `BeanFactoryPostProcessor` that lets you register your own custom qualifier
|
||||
annotation types, even if they are not annotated with Spring's `@Qualifier` annotation.
|
||||
The following example shows how to use `CustomAutowireConfigurer`:
|
||||
|
||||
@@ -84,7 +84,7 @@ Kotlin::
|
||||
NOTE: The name provided with the annotation is resolved as a bean name by the
|
||||
`ApplicationContext` of which the `CommonAnnotationBeanPostProcessor` is aware.
|
||||
The names can be resolved through JNDI if you configure Spring's
|
||||
{spring-framework-api}/jndi/support/SimpleJndiBeanFactory.html[`SimpleJndiBeanFactory`]
|
||||
{api-spring-framework}/jndi/support/SimpleJndiBeanFactory.html[`SimpleJndiBeanFactory`]
|
||||
explicitly. However, we recommend that you rely on the default behavior and
|
||||
use Spring's JNDI lookup capabilities to preserve the level of indirection.
|
||||
|
||||
|
||||
@@ -2,28 +2,36 @@
|
||||
= Container Overview
|
||||
|
||||
The `org.springframework.context.ApplicationContext` interface represents the Spring IoC
|
||||
container and is responsible for instantiating, configuring, and assembling the beans.
|
||||
The container gets its instructions on the components to instantiate, configure, and
|
||||
assemble by reading configuration metadata. The configuration metadata can be represented
|
||||
as annotated component classes, configuration classes with factory methods, or external
|
||||
XML files or Groovy scripts. With either format, you may compose your application and the
|
||||
rich interdependencies between those components.
|
||||
container and is responsible for instantiating, configuring, and assembling the
|
||||
beans. The container gets its instructions on what objects to
|
||||
instantiate, configure, and assemble by reading configuration metadata. The
|
||||
configuration metadata is represented in XML, Java annotations, or Java code. It lets
|
||||
you express the objects that compose your application and the rich interdependencies
|
||||
between those objects.
|
||||
|
||||
Several implementations of the `ApplicationContext` interface are part of core Spring.
|
||||
In stand-alone applications, it is common to create an instance of
|
||||
{spring-framework-api}/context/annotation/AnnotationConfigApplicationContext.html[`AnnotationConfigApplicationContext`]
|
||||
or {spring-framework-api}/context/support/ClassPathXmlApplicationContext.html[`ClassPathXmlApplicationContext`].
|
||||
Several implementations of the `ApplicationContext` interface are supplied
|
||||
with Spring. In stand-alone applications, it is common to create an
|
||||
instance of
|
||||
{api-spring-framework}/context/support/ClassPathXmlApplicationContext.html[`ClassPathXmlApplicationContext`]
|
||||
or {api-spring-framework}/context/support/FileSystemXmlApplicationContext.html[`FileSystemXmlApplicationContext`].
|
||||
While XML has been the traditional format for defining configuration metadata, you can
|
||||
instruct the container to use Java annotations or code as the metadata format by
|
||||
providing a small amount of XML configuration to declaratively enable support for these
|
||||
additional metadata formats.
|
||||
|
||||
In most application scenarios, explicit user code is not required to instantiate one or
|
||||
more instances of a Spring IoC container. For example, in a plain web application scenario,
|
||||
a simple boilerplate web descriptor XML in the `web.xml` file of the application suffices (see
|
||||
more instances of a Spring IoC container. For example, in a web application scenario, a
|
||||
simple eight (or so) lines of boilerplate web descriptor XML in the `web.xml` file
|
||||
of the application typically suffices (see
|
||||
xref:core/beans/context-introduction.adoc#context-create[Convenient ApplicationContext Instantiation for Web Applications]).
|
||||
In a Spring Boot scenario, the application context is implicitly bootstrapped for you
|
||||
based on common setup conventions.
|
||||
If you use the https://spring.io/tools[Spring Tools for Eclipse] (an Eclipse-powered
|
||||
development environment), you can easily create this boilerplate configuration with a
|
||||
few mouse clicks or keystrokes.
|
||||
|
||||
The following diagram shows a high-level view of how Spring works. Your application classes
|
||||
are combined with configuration metadata so that, after the `ApplicationContext` is
|
||||
created and initialized, you have a fully configured and executable system or application.
|
||||
created and initialized, you have a fully configured and executable system or
|
||||
application.
|
||||
|
||||
.The Spring IoC container
|
||||
image::container-magic.png[]
|
||||
@@ -35,25 +43,33 @@ image::container-magic.png[]
|
||||
|
||||
As the preceding diagram shows, the Spring IoC container consumes a form of
|
||||
configuration metadata. This configuration metadata represents how you, as an
|
||||
application developer, tell the Spring container to instantiate, configure,
|
||||
and assemble the components in your application.
|
||||
application developer, tell the Spring container to instantiate, configure, and assemble
|
||||
the objects in your application.
|
||||
|
||||
Configuration metadata is traditionally supplied in a simple and intuitive XML format,
|
||||
which is what most of this chapter uses to convey key concepts and features of the
|
||||
Spring IoC container.
|
||||
|
||||
NOTE: XML-based metadata is not the only allowed form of configuration metadata.
|
||||
The Spring IoC container itself is totally decoupled from the format in which this
|
||||
configuration metadata is actually written. These days, many developers choose
|
||||
xref:core/beans/java.adoc[Java-based configuration] for their Spring applications:
|
||||
xref:core/beans/java.adoc[Java-based configuration] for their Spring applications.
|
||||
|
||||
For information about using other forms of metadata with the Spring container, see:
|
||||
|
||||
* xref:core/beans/annotation-config.adoc[Annotation-based configuration]: define beans using
|
||||
annotation-based configuration metadata on your application's component classes.
|
||||
annotation-based configuration metadata.
|
||||
* xref:core/beans/java.adoc[Java-based configuration]: define beans external to your application
|
||||
classes by using Java-based configuration classes. To use these features, see the
|
||||
{spring-framework-api}/context/annotation/Configuration.html[`@Configuration`],
|
||||
{spring-framework-api}/context/annotation/Bean.html[`@Bean`],
|
||||
{spring-framework-api}/context/annotation/Import.html[`@Import`],
|
||||
and {spring-framework-api}/context/annotation/DependsOn.html[`@DependsOn`] annotations.
|
||||
classes by using Java rather than XML files. To use these features, see the
|
||||
{api-spring-framework}/context/annotation/Configuration.html[`@Configuration`],
|
||||
{api-spring-framework}/context/annotation/Bean.html[`@Bean`],
|
||||
{api-spring-framework}/context/annotation/Import.html[`@Import`],
|
||||
and {api-spring-framework}/context/annotation/DependsOn.html[`@DependsOn`] annotations.
|
||||
|
||||
Spring configuration consists of at least one and typically more than one bean definition
|
||||
that the container must manage. Java configuration typically uses `@Bean`-annotated
|
||||
methods within a `@Configuration` class, each corresponding to one bean definition.
|
||||
Spring configuration consists of at least one and typically more than one bean
|
||||
definition that the container must manage. XML-based configuration metadata configures these
|
||||
beans as `<bean/>` elements inside a top-level `<beans/>` element. Java
|
||||
configuration typically uses `@Bean`-annotated methods within a `@Configuration` class.
|
||||
|
||||
These bean definitions correspond to the actual objects that make up your application.
|
||||
Typically, you define service layer objects, persistence layer objects such as
|
||||
@@ -63,14 +79,7 @@ Typically, one does not configure fine-grained domain objects in the container,
|
||||
it is usually the responsibility of repositories and business logic to create and load
|
||||
domain objects.
|
||||
|
||||
|
||||
|
||||
[[beans-factory-xml]]
|
||||
=== XML as an External Configuration DSL
|
||||
|
||||
XML-based configuration metadata configures these beans as `<bean/>` elements inside
|
||||
a top-level `<beans/>` element. The following example shows the basic structure of
|
||||
XML-based configuration metadata:
|
||||
The following example shows the basic structure of XML-based configuration metadata:
|
||||
|
||||
[source,xml,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
@@ -101,9 +110,14 @@ The value of the `id` attribute can be used to refer to collaborating objects. T
|
||||
for referring to collaborating objects is not shown in this example. See
|
||||
xref:core/beans/dependencies.adoc[Dependencies] for more information.
|
||||
|
||||
For instantiating a container, the location path or paths to the XML resource files
|
||||
need to be supplied to a `ClassPathXmlApplicationContext` constructor that let the
|
||||
container load configuration metadata from a variety of external resources, such
|
||||
|
||||
|
||||
[[beans-factory-instantiation]]
|
||||
== Instantiating a Container
|
||||
|
||||
The location path or paths
|
||||
supplied to an `ApplicationContext` constructor are resource strings that let
|
||||
the container load configuration metadata from a variety of external resources, such
|
||||
as the local file system, the Java `CLASSPATH`, and so on.
|
||||
|
||||
[tabs]
|
||||
@@ -195,9 +209,9 @@ xref:core/beans/dependencies.adoc[Dependencies].
|
||||
It can be useful to have bean definitions span multiple XML files. Often, each individual
|
||||
XML configuration file represents a logical layer or module in your architecture.
|
||||
|
||||
You can use the `ClassPathXmlApplicationContext` constructor to load bean definitions from
|
||||
You can use the application context constructor to load bean definitions from all these
|
||||
XML fragments. This constructor takes multiple `Resource` locations, as was shown in the
|
||||
xref:core/beans/basics.adoc#beans-factory-xml[previous section]. Alternatively,
|
||||
xref:core/beans/basics.adoc#beans-factory-instantiation[previous section]. Alternatively,
|
||||
use one or more occurrences of the `<import/>` element to load bean definitions from
|
||||
another file or files. The following example shows how to do so:
|
||||
|
||||
@@ -245,7 +259,7 @@ configuration features beyond plain bean definitions are available in a selectio
|
||||
of XML namespaces provided by Spring -- for example, the `context` and `util` namespaces.
|
||||
|
||||
|
||||
[[beans-factory-groovy]]
|
||||
[[groovy-bean-definition-dsl]]
|
||||
=== The Groovy Bean Definition DSL
|
||||
|
||||
As a further example for externalized configuration metadata, bean definitions can also
|
||||
@@ -406,3 +420,4 @@ a dependency on a specific bean through metadata (such as an autowiring annotati
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -27,7 +27,7 @@ use these features.
|
||||
== `@Component` and Further Stereotype Annotations
|
||||
|
||||
The `@Repository` annotation is a marker for any class that fulfills the role or
|
||||
_stereotype_ of a repository (also known as Data Access Object or DAO). Among the uses
|
||||
stereotype of a repository (also known as Data Access Object or DAO). Among the uses
|
||||
of this marker is the automatic translation of exceptions, as described in
|
||||
xref:data-access/orm/general.adoc#orm-exception-translation[Exception Translation].
|
||||
|
||||
@@ -39,7 +39,7 @@ layers, respectively). Therefore, you can annotate your component classes with
|
||||
`@Component`, but, by annotating them with `@Repository`, `@Service`, or `@Controller`
|
||||
instead, your classes are more properly suited for processing by tools or associating
|
||||
with aspects. For example, these stereotype annotations make ideal targets for
|
||||
pointcuts. `@Repository`, `@Service`, and `@Controller` may also
|
||||
pointcuts. `@Repository`, `@Service`, and `@Controller` can also
|
||||
carry additional semantics in future releases of the Spring Framework. Thus, if you are
|
||||
choosing between using `@Component` or `@Service` for your service layer, `@Service` is
|
||||
clearly the better choice. Similarly, as stated earlier, `@Repository` is already
|
||||
@@ -191,7 +191,7 @@ Kotlin::
|
||||
======
|
||||
|
||||
For further details, see the
|
||||
{spring-framework-wiki}/Spring-Annotation-Programming-Model[Spring Annotation Programming Model]
|
||||
https://github.com/spring-projects/spring-framework/wiki/Spring-Annotation-Programming-Model[Spring Annotation Programming Model]
|
||||
wiki page.
|
||||
|
||||
|
||||
@@ -315,7 +315,7 @@ entries in the classpath. When you build JARs with Ant, make sure that you do no
|
||||
activate the files-only switch of the JAR task. Also, classpath directories may not be
|
||||
exposed based on security policies in some environments -- for example, standalone apps on
|
||||
JDK 1.7.0_45 and higher (which requires 'Trusted-Library' setup in your manifests -- see
|
||||
{stackoverflow-questions}/19394570/java-jre-7u45-breaks-classloader-getresources).
|
||||
https://stackoverflow.com/questions/19394570/java-jre-7u45-breaks-classloader-getresources).
|
||||
|
||||
On JDK 9's module path (Jigsaw), Spring's classpath scanning generally works as expected.
|
||||
However, make sure that your component classes are exported in your `module-info`
|
||||
@@ -664,36 +664,15 @@ analogous to how the container selects between multiple `@Autowired` constructor
|
||||
== Naming Autodetected Components
|
||||
|
||||
When a component is autodetected as part of the scanning process, its bean name is
|
||||
generated by the `BeanNameGenerator` strategy known to that scanner.
|
||||
generated by the `BeanNameGenerator` strategy known to that scanner. By default, any
|
||||
Spring stereotype annotation (`@Component`, `@Repository`, `@Service`, and
|
||||
`@Controller`) that contains a name `value` thereby provides that name to the
|
||||
corresponding bean definition.
|
||||
|
||||
By default, the `AnnotationBeanNameGenerator` is used. For Spring
|
||||
xref:core/beans/classpath-scanning.adoc#beans-stereotype-annotations[stereotype annotations],
|
||||
if you supply a name via the annotation's `value` attribute that name will be used as
|
||||
the name in the corresponding bean definition. This convention also applies when the
|
||||
following JSR-250 and JSR-330 annotations are used instead of Spring stereotype
|
||||
annotations: `@jakarta.annotation.ManagedBean`, `@javax.annotation.ManagedBean`,
|
||||
`@jakarta.inject.Named`, and `@javax.inject.Named`.
|
||||
|
||||
As of Spring Framework 6.1, the name of the annotation attribute that is used to specify
|
||||
the bean name is no longer required to be `value`. Custom stereotype annotations can
|
||||
declare an attribute with a different name (such as `name`) and annotate that attribute
|
||||
with `@AliasFor(annotation = Component.class, attribute = "value")`. See the source code
|
||||
declaration of `ControllerAdvice#name()` for a concrete example.
|
||||
|
||||
[WARNING]
|
||||
====
|
||||
As of Spring Framework 6.1, support for convention-based stereotype names is deprecated
|
||||
and will be removed in a future version of the framework. Consequently, custom stereotype
|
||||
annotations must use `@AliasFor` to declare an explicit alias for the `value` attribute
|
||||
in `@Component`. See the source code declaration of `Repository#value()` and
|
||||
`ControllerAdvice#name()` for concrete examples.
|
||||
====
|
||||
|
||||
If an explicit bean name cannot be derived from such an annotation or for any other
|
||||
detected component (such as those discovered by custom filters), the default bean name
|
||||
generator returns the uncapitalized non-qualified class name. For example, if the
|
||||
following component classes were detected, the names would be `myMovieLister` and
|
||||
`movieFinderImpl`.
|
||||
If such an annotation contains no name `value` or for any other detected component
|
||||
(such as those discovered by custom filters), the default bean name generator returns
|
||||
the uncapitalized non-qualified class name. For example, if the following component
|
||||
classes were detected, the names would be `myMovieLister` and `movieFinderImpl`:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -743,7 +722,7 @@ Kotlin::
|
||||
|
||||
If you do not want to rely on the default bean-naming strategy, you can provide a custom
|
||||
bean-naming strategy. First, implement the
|
||||
{spring-framework-api}/beans/factory/support/BeanNameGenerator.html[`BeanNameGenerator`]
|
||||
{api-spring-framework}/beans/factory/support/BeanNameGenerator.html[`BeanNameGenerator`]
|
||||
interface, and be sure to include a default no-arg constructor. Then, provide the fully
|
||||
qualified class name when configuring the scanner, as the following example annotation
|
||||
and bean definition show.
|
||||
@@ -840,7 +819,7 @@ possibly also declaring a custom scoped-proxy mode.
|
||||
|
||||
NOTE: To provide a custom strategy for scope resolution rather than relying on the
|
||||
annotation-based approach, you can implement the
|
||||
{spring-framework-api}/context/annotation/ScopeMetadataResolver.html[`ScopeMetadataResolver`]
|
||||
{api-spring-framework}/context/annotation/ScopeMetadataResolver.html[`ScopeMetadataResolver`]
|
||||
interface. Be sure to include a default no-arg constructor. Then you can provide the
|
||||
fully qualified class name when configuring the scanner, as the following example of both
|
||||
an annotation and a bean definition shows:
|
||||
@@ -1010,4 +989,68 @@ metadata is provided per-instance rather than per-class.
|
||||
|
||||
|
||||
|
||||
[[beans-scanning-index]]
|
||||
== Generating an Index of Candidate Components
|
||||
|
||||
While classpath scanning is very fast, it is possible to improve the startup performance
|
||||
of large applications by creating a static list of candidates at compilation time. In this
|
||||
mode, all modules that are targets of component scanning must use this mechanism.
|
||||
|
||||
NOTE: Your existing `@ComponentScan` or `<context:component-scan/>` directives must remain
|
||||
unchanged to request the context to scan candidates in certain packages. When the
|
||||
`ApplicationContext` detects such an index, it automatically uses it rather than scanning
|
||||
the classpath.
|
||||
|
||||
To generate the index, add an additional dependency to each module that contains
|
||||
components that are targets for component scan directives. The following example shows
|
||||
how to do so with Maven:
|
||||
|
||||
[source,xml,indent=0,subs="verbatim,quotes,attributes"]
|
||||
----
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework</groupId>
|
||||
<artifactId>spring-context-indexer</artifactId>
|
||||
<version>{spring-version}</version>
|
||||
<optional>true</optional>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
----
|
||||
|
||||
With Gradle 4.5 and earlier, the dependency should be declared in the `compileOnly`
|
||||
configuration, as shown in the following example:
|
||||
|
||||
[source,groovy,indent=0,subs="verbatim,quotes,attributes"]
|
||||
----
|
||||
dependencies {
|
||||
compileOnly "org.springframework:spring-context-indexer:{spring-version}"
|
||||
}
|
||||
----
|
||||
|
||||
With Gradle 4.6 and later, the dependency should be declared in the `annotationProcessor`
|
||||
configuration, as shown in the following example:
|
||||
|
||||
[source,groovy,indent=0,subs="verbatim,quotes,attributes"]
|
||||
----
|
||||
dependencies {
|
||||
annotationProcessor "org.springframework:spring-context-indexer:{spring-version}"
|
||||
}
|
||||
----
|
||||
|
||||
The `spring-context-indexer` artifact generates a `META-INF/spring.components` file that
|
||||
is included in the jar file.
|
||||
|
||||
NOTE: When working with this mode in your IDE, the `spring-context-indexer` must be
|
||||
registered as an annotation processor to make sure the index is up-to-date when
|
||||
candidate components are updated.
|
||||
|
||||
TIP: The index is enabled automatically when a `META-INF/spring.components` file is found
|
||||
on the classpath. If an index is partially available for some libraries (or use cases)
|
||||
but could not be built for the whole application, you can fall back to a regular classpath
|
||||
arrangement (as though no index were present at all) by setting `spring.index.ignore` to
|
||||
`true`, either as a JVM system property or via the
|
||||
xref:appendix.adoc#appendix-spring-properties[`SpringProperties`] mechanism.
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -4,7 +4,7 @@
|
||||
As discussed in the xref:web/webmvc-view/mvc-xslt.adoc#mvc-view-xslt-beandefs[chapter introduction], the `org.springframework.beans.factory`
|
||||
package provides basic functionality for managing and manipulating beans, including in a
|
||||
programmatic way. The `org.springframework.context` package adds the
|
||||
{spring-framework-api}/context/ApplicationContext.html[`ApplicationContext`]
|
||||
{api-spring-framework}/context/ApplicationContext.html[`ApplicationContext`]
|
||||
interface, which extends the `BeanFactory` interface, in addition to extending other
|
||||
interfaces to provide additional functionality in a more application
|
||||
framework-oriented style. Many people use the `ApplicationContext` in a completely
|
||||
@@ -269,7 +269,7 @@ file format but is more flexible than the standard JDK based
|
||||
`ResourceBundleMessageSource` implementation. In particular, it allows for reading
|
||||
files from any Spring resource location (not only from the classpath) and supports hot
|
||||
reloading of bundle property files (while efficiently caching them in between).
|
||||
See the {spring-framework-api}/context/support/ReloadableResourceBundleMessageSource.html[`ReloadableResourceBundleMessageSource`]
|
||||
See the {api-spring-framework}/context/support/ReloadableResourceBundleMessageSource.html[`ReloadableResourceBundleMessageSource`]
|
||||
javadoc for details.
|
||||
|
||||
|
||||
@@ -478,21 +478,20 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
Notice that `ApplicationListener` is generically parameterized with the type of your custom event (`BlockedListEvent` in the preceding example).
|
||||
This means that the `onApplicationEvent()` method can remain type-safe, avoiding any need for downcasting.
|
||||
You can register as many event listeners as you wish, but note that, by default, event listeners receive events synchronously.
|
||||
This means that the `publishEvent()` method blocks until all listeners have finished processing the event.
|
||||
One advantage of this synchronous and single-threaded approach is that, when a listener receives an event,
|
||||
it operates inside the transaction context of the publisher if a transaction context is available.
|
||||
If another strategy for event publication becomes necessary, e.g. asynchronous event processing by default,
|
||||
see the javadoc for Spring's {spring-framework-api}/context/event/ApplicationEventMulticaster.html[`ApplicationEventMulticaster`] interface
|
||||
and {spring-framework-api}/context/event/SimpleApplicationEventMulticaster.html[`SimpleApplicationEventMulticaster`] implementation
|
||||
for configuration options which can be applied to a custom "applicationEventMulticaster" bean definition.
|
||||
In these cases, ThreadLocals and logging context are not propagated for the event processing.
|
||||
See xref:integration/observability.adoc#observability.application-events[the `@EventListener` Observability section]
|
||||
for more information on Observability concerns.
|
||||
|
||||
|
||||
Notice that `ApplicationListener` is generically parameterized with the type of your
|
||||
custom event (`BlockedListEvent` in the preceding example). This means that the
|
||||
`onApplicationEvent()` method can remain type-safe, avoiding any need for downcasting.
|
||||
You can register as many event listeners as you wish, but note that, by default, event
|
||||
listeners receive events synchronously. This means that the `publishEvent()` method
|
||||
blocks until all listeners have finished processing the event. One advantage of this
|
||||
synchronous and single-threaded approach is that, when a listener receives an event,
|
||||
it operates inside the transaction context of the publisher if a transaction context
|
||||
is available. If another strategy for event publication becomes necessary, e.g.
|
||||
asynchronous event processing by default, see the javadoc for Spring's
|
||||
{api-spring-framework}/context/event/ApplicationEventMulticaster.html[`ApplicationEventMulticaster`] interface
|
||||
and {api-spring-framework}/context/event/SimpleApplicationEventMulticaster.html[`SimpleApplicationEventMulticaster`]
|
||||
implementation for configuration options which can be applied to a custom
|
||||
"applicationEventMulticaster" bean definition.
|
||||
|
||||
The following example shows the bean definitions used to register and configure each of
|
||||
the classes above:
|
||||
@@ -529,7 +528,7 @@ notify appropriate parties.
|
||||
NOTE: Spring's eventing mechanism is designed for simple communication between Spring beans
|
||||
within the same application context. However, for more sophisticated enterprise
|
||||
integration needs, the separately maintained
|
||||
{spring-site-projects}/spring-integration/[Spring Integration] project provides
|
||||
https://projects.spring.io/spring-integration/[Spring Integration] project provides
|
||||
complete support for building lightweight,
|
||||
https://www.enterpriseintegrationpatterns.com[pattern-oriented], event-driven
|
||||
architectures that build upon the well-known Spring programming model.
|
||||
@@ -742,15 +741,12 @@ Be aware of the following limitations when using asynchronous events:
|
||||
|
||||
* If an asynchronous event listener throws an `Exception`, it is not propagated to the
|
||||
caller. See
|
||||
{spring-framework-api}/aop/interceptor/AsyncUncaughtExceptionHandler.html[`AsyncUncaughtExceptionHandler`]
|
||||
{api-spring-framework}/aop/interceptor/AsyncUncaughtExceptionHandler.html[`AsyncUncaughtExceptionHandler`]
|
||||
for more details.
|
||||
* Asynchronous event listener methods cannot publish a subsequent event by returning a
|
||||
value. If you need to publish another event as the result of the processing, inject an
|
||||
{spring-framework-api}/context/ApplicationEventPublisher.html[`ApplicationEventPublisher`]
|
||||
{api-spring-framework}/context/ApplicationEventPublisher.html[`ApplicationEventPublisher`]
|
||||
to publish the event manually.
|
||||
* ThreadLocals and logging context are not propagated by default for the event processing.
|
||||
See xref:integration/observability.adoc#observability.application-events[the `@EventListener` Observability section]
|
||||
for more information on Observability concerns.
|
||||
|
||||
|
||||
[[context-functionality-events-order]]
|
||||
@@ -1040,7 +1036,7 @@ and JMX support facilities. Application components can also interact with the ap
|
||||
server's JCA `WorkManager` through Spring's `TaskExecutor` abstraction.
|
||||
|
||||
See the javadoc of the
|
||||
{spring-framework-api}/jca/context/SpringContextResourceAdapter.html[`SpringContextResourceAdapter`]
|
||||
{api-spring-framework}/jca/context/SpringContextResourceAdapter.html[`SpringContextResourceAdapter`]
|
||||
class for the configuration details involved in RAR deployment.
|
||||
|
||||
For a simple deployment of a Spring ApplicationContext as a Jakarta EE RAR file:
|
||||
@@ -1050,7 +1046,7 @@ all application classes into a RAR file (which is a standard JAR file with a dif
|
||||
file extension).
|
||||
. Add all required library JARs into the root of the RAR archive.
|
||||
. Add a
|
||||
`META-INF/ra.xml` deployment descriptor (as shown in the {spring-framework-api}/jca/context/SpringContextResourceAdapter.html[javadoc for `SpringContextResourceAdapter`])
|
||||
`META-INF/ra.xml` deployment descriptor (as shown in the {api-spring-framework}/jca/context/SpringContextResourceAdapter.html[javadoc for `SpringContextResourceAdapter`])
|
||||
and the corresponding Spring XML bean definition file(s) (typically
|
||||
`META-INF/applicationContext.xml`).
|
||||
. Drop the resulting RAR file into your
|
||||
|
||||
@@ -44,7 +44,7 @@ weaver instance. This is particularly useful in combination with
|
||||
xref:data-access/orm/jpa.adoc[Spring's JPA support] where load-time weaving may be
|
||||
necessary for JPA class transformation.
|
||||
Consult the
|
||||
{spring-framework-api}/orm/jpa/LocalContainerEntityManagerFactoryBean.html[`LocalContainerEntityManagerFactoryBean`]
|
||||
{api-spring-framework}/orm/jpa/LocalContainerEntityManagerFactoryBean.html[`LocalContainerEntityManagerFactoryBean`]
|
||||
javadoc for more detail. For more on AspectJ load-time weaving, see xref:core/aop/using-aspectj.adoc#aop-aj-ltw[Load-time Weaving with AspectJ in the Spring Framework].
|
||||
|
||||
|
||||
|
||||
@@ -75,31 +75,6 @@ lead to concurrent access exceptions, inconsistent state in the bean container,
|
||||
|
||||
|
||||
|
||||
[[beans-definition-overriding]]
|
||||
== Overriding Beans
|
||||
|
||||
Bean overriding is happening when a bean is registered using an identifier that is
|
||||
already allocated. While bean overriding is possible, it makes the configuration harder
|
||||
to read and this feature will be deprecated in a future release.
|
||||
|
||||
To disable bean overriding altogether, you can set the `allowBeanDefinitionOverriding`
|
||||
flag to `false` on the `ApplicationContext` before it is refreshed. In such setup, an
|
||||
exception is thrown if bean overriding is used.
|
||||
|
||||
By default, the container logs every bean overriding at `INFO` level so that you can
|
||||
adapt your configuration accordingly. While not recommended, you can silence those logs
|
||||
by setting the `allowBeanDefinitionOverriding` flag to `true`.
|
||||
|
||||
.Java-configuration
|
||||
****
|
||||
If you use Java Configuration, a corresponding `@Bean` method always silently overrides
|
||||
a scanned bean class with the same component name as long as the return type of the
|
||||
`@Bean` method matches that bean class. This simply means that the container will call
|
||||
the `@Bean` factory method in favor of any pre-declared constructor on the bean class.
|
||||
****
|
||||
|
||||
|
||||
|
||||
[[beans-beanname]]
|
||||
== Naming Beans
|
||||
|
||||
@@ -259,10 +234,6 @@ For details about the mechanism for supplying arguments to the constructor (if r
|
||||
and setting object instance properties after the object is constructed, see
|
||||
xref:core/beans/dependencies/factory-collaborators.adoc[Injecting Dependencies].
|
||||
|
||||
NOTE: In the case of constructor arguments, the container can select a corresponding
|
||||
constructor among several overloaded constructors. That said, to avoid ambiguities,
|
||||
it is recommended to keep your constructor signatures as straightforward as possible.
|
||||
|
||||
|
||||
[[beans-factory-class-static-factory-method]]
|
||||
=== Instantiation with a Static Factory Method
|
||||
@@ -323,24 +294,6 @@ For details about the mechanism for supplying (optional) arguments to the factor
|
||||
and setting object instance properties after the object is returned from the factory,
|
||||
see xref:core/beans/dependencies/factory-properties-detailed.adoc[Dependencies and Configuration in Detail].
|
||||
|
||||
NOTE: In the case of factory method arguments, the container can select a corresponding
|
||||
method among several overloaded methods of the same name. That said, to avoid ambiguities,
|
||||
it is recommended to keep your factory method signatures as straightforward as possible.
|
||||
|
||||
[TIP]
|
||||
====
|
||||
A typical problematic case with factory method overloading is Mockito with its many
|
||||
overloads of the `mock` method. Choose the most specific variant of `mock` possible:
|
||||
|
||||
[source,xml,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
<bean id="clientService" class="org.mockito.Mockito" factory-method="mock">
|
||||
<constructor-arg type="java.lang.Class" value="examples.ClientService"/>
|
||||
<constructor-arg type="java.lang.String" value="clientService"/>
|
||||
</bean>
|
||||
----
|
||||
====
|
||||
|
||||
|
||||
[[beans-factory-class-instance-factory-method]]
|
||||
=== Instantiation by Using an Instance Factory Method
|
||||
|
||||
@@ -2,14 +2,13 @@
|
||||
= Using `depends-on`
|
||||
|
||||
If a bean is a dependency of another bean, that usually means that one bean is set as a
|
||||
property of another. Typically you accomplish this with the
|
||||
xref:core/beans/dependencies/factory-properties-detailed.adoc#beans-ref-element[`<ref/>` element>]
|
||||
in XML-based configuration metadata. However, sometimes dependencies between beans are
|
||||
less direct. An example is when a static initializer in a class needs to be triggered,
|
||||
such as for database driver registration. The `depends-on` attribute can explicitly force
|
||||
one or more beans to be initialized before the bean using this element is initialized.
|
||||
The following example uses the `depends-on` attribute to express a dependency on a single
|
||||
bean:
|
||||
property of another. Typically you accomplish this with the <<beans-ref-element, `<ref/>`
|
||||
element>> in XML-based configuration metadata. However, sometimes dependencies between
|
||||
beans are less direct. An example is when a static initializer in a class needs to be
|
||||
triggered, such as for database driver registration. The `depends-on` attribute can
|
||||
explicitly force one or more beans to be initialized before the bean using this element
|
||||
is initialized. The following example uses the `depends-on` attribute to express a
|
||||
dependency on a single bean:
|
||||
|
||||
[source,xml,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
|
||||
+2
-2
@@ -99,7 +99,7 @@ container, lets you handle this use case cleanly.
|
||||
|
||||
****
|
||||
You can read more about the motivation for Method Injection in
|
||||
{spring-site-blog}/2004/08/06/method-injection/[this blog entry].
|
||||
https://spring.io/blog/2004/08/06/method-injection/[this blog entry].
|
||||
****
|
||||
|
||||
|
||||
@@ -201,7 +201,7 @@ the original class. Consider the following example:
|
||||
<!-- inject dependencies here as required -->
|
||||
</bean>
|
||||
|
||||
<!-- commandManager uses myCommand prototype bean -->
|
||||
<!-- commandProcessor uses statefulCommandHelper -->
|
||||
<bean id="commandManager" class="fiona.apple.CommandManager">
|
||||
<lookup-method name="createCommand" bean="myCommand"/>
|
||||
</bean>
|
||||
|
||||
+1
-1
@@ -51,7 +51,7 @@ XML configuration:
|
||||
|
||||
The preceding XML is more succinct. However, typos are discovered at runtime rather than
|
||||
design time, unless you use an IDE (such as https://www.jetbrains.com/idea/[IntelliJ
|
||||
IDEA] or the {spring-site-tools}[Spring Tools for Eclipse])
|
||||
IDEA] or the https://spring.io/tools[Spring Tools for Eclipse])
|
||||
that supports automatic property completion when you create bean definitions. Such IDE
|
||||
assistance is highly recommended.
|
||||
|
||||
|
||||
@@ -1,7 +1,7 @@
|
||||
[[beans-environment]]
|
||||
= Environment Abstraction
|
||||
|
||||
The {spring-framework-api}/core/env/Environment.html[`Environment`] interface
|
||||
The {api-spring-framework}/core/env/Environment.html[`Environment`] interface
|
||||
is an abstraction integrated in the container that models two key
|
||||
aspects of the application environment: xref:core/beans/environment.adoc#beans-definition-profiles[profiles]
|
||||
and xref:core/beans/environment.adoc#beans-property-source-abstraction[properties].
|
||||
@@ -118,7 +118,7 @@ situation B. We start by updating our configuration to reflect this need.
|
||||
[[beans-definition-profiles-java]]
|
||||
=== Using `@Profile`
|
||||
|
||||
The {spring-framework-api}/context/annotation/Profile.html[`@Profile`]
|
||||
The {api-spring-framework}/context/annotation/Profile.html[`@Profile`]
|
||||
annotation lets you indicate that a component is eligible for registration
|
||||
when one or more specified profiles are active. Using our preceding example, we
|
||||
can rewrite the `dataSource` configuration as follows:
|
||||
@@ -516,8 +516,8 @@ as the following example shows:
|
||||
[[beans-definition-profiles-default]]
|
||||
=== Default Profile
|
||||
|
||||
The default profile represents the profile that is enabled if no profile is active. Consider
|
||||
the following example:
|
||||
The default profile represents the profile that is enabled by default. Consider the
|
||||
following example:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -558,9 +558,9 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
If xref:#beans-definition-profiles-enable[no profile is active], the `dataSource` is
|
||||
created. You can see this as a way to provide a default definition for one or more
|
||||
beans. If any profile is enabled, the default profile does not apply.
|
||||
If no profile is active, the `dataSource` is created. You can see this
|
||||
as a way to provide a default definition for one or more beans. If any
|
||||
profile is enabled, the default profile does not apply.
|
||||
|
||||
The name of the default profile is `default`. You can change the name of
|
||||
the default profile by using `setDefaultProfiles()` on the `Environment` or,
|
||||
@@ -599,17 +599,17 @@ Kotlin::
|
||||
|
||||
In the preceding snippet, we see a high-level way of asking Spring whether the `my-property` property is
|
||||
defined for the current environment. To answer this question, the `Environment` object performs
|
||||
a search over a set of {spring-framework-api}/core/env/PropertySource.html[`PropertySource`]
|
||||
a search over a set of {api-spring-framework}/core/env/PropertySource.html[`PropertySource`]
|
||||
objects. A `PropertySource` is a simple abstraction over any source of key-value pairs, and
|
||||
Spring's {spring-framework-api}/core/env/StandardEnvironment.html[`StandardEnvironment`]
|
||||
Spring's {api-spring-framework}/core/env/StandardEnvironment.html[`StandardEnvironment`]
|
||||
is configured with two PropertySource objects -- one representing the set of JVM system properties
|
||||
(`System.getProperties()`) and one representing the set of system environment variables
|
||||
(`System.getenv()`).
|
||||
|
||||
NOTE: These default property sources are present for `StandardEnvironment`, for use in standalone
|
||||
applications. {spring-framework-api}/web/context/support/StandardServletEnvironment.html[`StandardServletEnvironment`]
|
||||
applications. {api-spring-framework}/web/context/support/StandardServletEnvironment.html[`StandardServletEnvironment`]
|
||||
is populated with additional default property sources including servlet config, servlet
|
||||
context parameters, and a {spring-framework-api}/jndi/JndiPropertySource.html[`JndiPropertySource`]
|
||||
context parameters, and a {api-spring-framework}/jndi/JndiPropertySource.html[`JndiPropertySource`]
|
||||
if JNDI is available.
|
||||
|
||||
Concretely, when you use the `StandardEnvironment`, the call to `env.containsProperty("my-property")`
|
||||
@@ -663,7 +663,7 @@ Kotlin::
|
||||
In the preceding code, `MyPropertySource` has been added with highest precedence in the
|
||||
search. If it contains a `my-property` property, the property is detected and returned, in favor of
|
||||
any `my-property` property in any other `PropertySource`. The
|
||||
{spring-framework-api}/core/env/MutablePropertySources.html[`MutablePropertySources`]
|
||||
{api-spring-framework}/core/env/MutablePropertySources.html[`MutablePropertySources`]
|
||||
API exposes a number of methods that allow for precise manipulation of the set of
|
||||
property sources.
|
||||
|
||||
@@ -672,7 +672,7 @@ property sources.
|
||||
[[beans-using-propertysource]]
|
||||
== Using `@PropertySource`
|
||||
|
||||
The {spring-framework-api}/context/annotation/PropertySource.html[`@PropertySource`]
|
||||
The {api-spring-framework}/context/annotation/PropertySource.html[`@PropertySource`]
|
||||
annotation provides a convenient and declarative mechanism for adding a `PropertySource`
|
||||
to Spring's `Environment`.
|
||||
|
||||
@@ -772,9 +772,11 @@ resolved to the corresponding value. If not, then `default/path` is used
|
||||
as a default. If no default is specified and a property cannot be resolved, an
|
||||
`IllegalArgumentException` is thrown.
|
||||
|
||||
NOTE: `@PropertySource` can be used as a repeatable annotation. `@PropertySource`
|
||||
may also be used as a meta-annotation to create custom composed annotations with
|
||||
attribute overrides.
|
||||
NOTE: The `@PropertySource` annotation is repeatable, according to Java 8 conventions.
|
||||
However, all such `@PropertySource` annotations need to be declared at the same
|
||||
level, either directly on the configuration class or as meta-annotations within the
|
||||
same custom annotation. Mixing direct annotations and meta-annotations is not
|
||||
recommended, since direct annotations effectively override meta-annotations.
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -22,8 +22,8 @@ in which these `BeanPostProcessor` instances run by setting the `order` property
|
||||
You can set this property only if the `BeanPostProcessor` implements the `Ordered`
|
||||
interface. If you write your own `BeanPostProcessor`, you should consider implementing
|
||||
the `Ordered` interface, too. For further details, see the javadoc of the
|
||||
{spring-framework-api}/beans/factory/config/BeanPostProcessor.html[`BeanPostProcessor`]
|
||||
and {spring-framework-api}/core/Ordered.html[`Ordered`] interfaces. See also the note on
|
||||
{api-spring-framework}/beans/factory/config/BeanPostProcessor.html[`BeanPostProcessor`]
|
||||
and {api-spring-framework}/core/Ordered.html[`Ordered`] interfaces. See also the note on
|
||||
xref:core/beans/factory-extension.adoc#beans-factory-programmatically-registering-beanpostprocessors[programmatic registration of `BeanPostProcessor` instances].
|
||||
|
||||
[NOTE]
|
||||
@@ -272,8 +272,8 @@ which these `BeanFactoryPostProcessor` instances run by setting the `order` prop
|
||||
However, you can only set this property if the `BeanFactoryPostProcessor` implements the
|
||||
`Ordered` interface. If you write your own `BeanFactoryPostProcessor`, you should
|
||||
consider implementing the `Ordered` interface, too. See the javadoc of the
|
||||
{spring-framework-api}/beans/factory/config/BeanFactoryPostProcessor.html[`BeanFactoryPostProcessor`]
|
||||
and {spring-framework-api}/core/Ordered.html[`Ordered`] interfaces for more details.
|
||||
{api-spring-framework}/beans/factory/config/BeanFactoryPostProcessor.html[`BeanFactoryPostProcessor`]
|
||||
and {api-spring-framework}/core/Ordered.html[`Ordered`] interfaces for more details.
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
|
||||
@@ -592,40 +592,6 @@ Kotlin::
|
||||
|
||||
|
||||
|
||||
[[beans-factory-thread-safety]]
|
||||
=== Thread Safety and Visibility
|
||||
|
||||
The Spring core container publishes created singleton instances in a thread-safe manner,
|
||||
guarding access through a singleton lock and guaranteeing visibility in other threads.
|
||||
|
||||
As a consequence, application-provided bean classes do not have to be concerned about the
|
||||
visibility of their initialization state. Regular configuration fields do not have to be
|
||||
marked as `volatile` as long as they are only mutated during the initialization phase,
|
||||
providing visibility guarantees similar to `final` even for setter-based configuration
|
||||
state that is mutable during that initial phase. If such fields get changed after the
|
||||
bean creation phase and its subsequent initial publication, they need to be declared as
|
||||
`volatile` or guarded by a common lock whenever accessed.
|
||||
|
||||
Note that concurrent access to such configuration state in singleton bean instances,
|
||||
e.g. for controller instances or repository instances, is perfectly thread-safe after
|
||||
such safe initial publication from the container side. This includes common singleton
|
||||
`FactoryBean` instances which are processed within the general singleton lock as well.
|
||||
|
||||
For destruction callbacks, the configuration state remains thread-safe but any runtime
|
||||
state accumulated between initialization and destruction should be kept in thread-safe
|
||||
structures (or in `volatile` fields for simple cases) as per common Java guidelines.
|
||||
|
||||
Deeper `Lifecycle` integration as shown above involves runtime-mutable state such as
|
||||
a `runnable` field which will have to be declared as `volatile`. While the common
|
||||
lifecycle callbacks follow a certain order, e.g. a start callback is guaranteed to
|
||||
only happen after full initialization and a stop callback only after an initial start,
|
||||
there is a special case with the common stop before destroy arrangement: It is strongly
|
||||
recommended that the internal state in any such bean also allows for an immediate
|
||||
destroy callback without a preceding stop since this may happen during an extraordinary
|
||||
shutdown after a cancelled bootstrap or in case of a stop timeout caused by another bean.
|
||||
|
||||
|
||||
|
||||
[[beans-factory-aware]]
|
||||
== `ApplicationContextAware` and `BeanNameAware`
|
||||
|
||||
|
||||
@@ -51,7 +51,7 @@ The following table describes the supported scopes:
|
||||
|
||||
NOTE: A thread scope is available but is not registered by default. For more information,
|
||||
see the documentation for
|
||||
{spring-framework-api}/context/support/SimpleThreadScope.html[`SimpleThreadScope`].
|
||||
{api-spring-framework}/context/support/SimpleThreadScope.html[`SimpleThreadScope`].
|
||||
For instructions on how to register this or any other custom scope, see
|
||||
xref:core/beans/factory-scopes.adoc#beans-factory-scopes-custom-using[Using a Custom Scope].
|
||||
|
||||
@@ -541,19 +541,6 @@ see xref:core/aop/proxying.adoc[Proxying Mechanisms].
|
||||
|
||||
|
||||
|
||||
[[beans-factory-scopes-injection]]
|
||||
=== Injecting Request/Session References Directly
|
||||
|
||||
As an alternative to factory scopes, a Spring `WebApplicationContext` also supports
|
||||
the injection of `HttpServletRequest`, `HttpServletResponse`, `HttpSession`,
|
||||
`WebRequest` and (if JSF is present) `FacesContext` and `ExternalContext` into
|
||||
Spring-managed beans, simply through type-based autowiring next to regular injection
|
||||
points for other beans. Spring generally injects proxies for such request and session
|
||||
objects which has the advantage of working in singleton beans and serializable beans
|
||||
as well, similar to scoped proxies for factory-scoped beans.
|
||||
|
||||
|
||||
|
||||
[[beans-factory-scopes-custom]]
|
||||
== Custom Scopes
|
||||
|
||||
@@ -569,7 +556,7 @@ To integrate your custom scopes into the Spring container, you need to implement
|
||||
`org.springframework.beans.factory.config.Scope` interface, which is described in this
|
||||
section. For an idea of how to implement your own scopes, see the `Scope`
|
||||
implementations that are supplied with the Spring Framework itself and the
|
||||
{spring-framework-api}/beans/factory/config/Scope.html[`Scope`] javadoc,
|
||||
{api-spring-framework}/beans/factory/config/Scope.html[`Scope`] javadoc,
|
||||
which explains the methods you need to implement in more detail.
|
||||
|
||||
The `Scope` interface has four methods to get objects from the scope, remove them from
|
||||
@@ -639,7 +626,7 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
See the {spring-framework-api}/beans/factory/config/Scope.html#registerDestructionCallback[javadoc]
|
||||
See the {api-spring-framework}/beans/factory/config/Scope.html#registerDestructionCallback[javadoc]
|
||||
or a Spring scope implementation for more information on destruction callbacks.
|
||||
|
||||
The following method obtains the conversation identifier for the underlying scope:
|
||||
|
||||
@@ -1,22 +1,22 @@
|
||||
[[beans-introduction]]
|
||||
= Introduction to the Spring IoC Container and Beans
|
||||
|
||||
This chapter covers the Spring Framework implementation of the Inversion of Control (IoC)
|
||||
principle. Dependency injection (DI) is a specialized form of IoC, whereby objects define
|
||||
their dependencies (that is, the other objects they work with) only through constructor
|
||||
arguments, arguments to a factory method, or properties that are set on the object
|
||||
instance after it is constructed or returned from a factory method. The IoC container
|
||||
This chapter covers the Spring Framework implementation of the Inversion of Control
|
||||
(IoC) principle. IoC is also known as dependency injection (DI). It is a process whereby
|
||||
objects define their dependencies (that is, the other objects they work with) only through
|
||||
constructor arguments, arguments to a factory method, or properties that are set on the
|
||||
object instance after it is constructed or returned from a factory method. The container
|
||||
then injects those dependencies when it creates the bean. This process is fundamentally
|
||||
the inverse (hence the name, Inversion of Control) of the bean itself controlling the
|
||||
instantiation or location of its dependencies by using direct construction of classes or
|
||||
a mechanism such as the Service Locator pattern.
|
||||
the inverse (hence the name, Inversion of Control) of the bean itself
|
||||
controlling the instantiation or location of its dependencies by using direct
|
||||
construction of classes or a mechanism such as the Service Locator pattern.
|
||||
|
||||
The `org.springframework.beans` and `org.springframework.context` packages are the basis
|
||||
for Spring Framework's IoC container. The
|
||||
{spring-framework-api}/beans/factory/BeanFactory.html[`BeanFactory`]
|
||||
{api-spring-framework}/beans/factory/BeanFactory.html[`BeanFactory`]
|
||||
interface provides an advanced configuration mechanism capable of managing any type of
|
||||
object.
|
||||
{spring-framework-api}/context/ApplicationContext.html[`ApplicationContext`]
|
||||
{api-spring-framework}/context/ApplicationContext.html[`ApplicationContext`]
|
||||
is a sub-interface of `BeanFactory`. It adds:
|
||||
|
||||
* Easier integration with Spring's AOP features
|
||||
|
||||
@@ -3,5 +3,17 @@
|
||||
:page-section-summary-toc: 1
|
||||
|
||||
This section covers how to use annotations in your Java code to configure the Spring
|
||||
container.
|
||||
container. It includes the following topics:
|
||||
|
||||
* xref:core/beans/java/basic-concepts.adoc[Basic Concepts: `@Bean` and `@Configuration`]
|
||||
* xref:core/beans/java/instantiating-container.adoc[Instantiating the Spring Container by Using `AnnotationConfigApplicationContext`]
|
||||
* xref:core/beans/java/bean-annotation.adoc[Using the `@Bean` Annotation]
|
||||
* xref:core/beans/java/configuration-annotation.adoc[Using the `@Configuration` annotation]
|
||||
* xref:core/beans/java/composing-configuration-classes.adoc[Composing Java-based Configurations]
|
||||
* xref:core/beans/environment.adoc#beans-definition-profiles[Bean Definition Profiles]
|
||||
* xref:core/beans/environment.adoc#beans-property-source-abstraction[`PropertySource` Abstraction]
|
||||
* xref:core/beans/environment.adoc#beans-using-propertysource[Using `@PropertySource`]
|
||||
* xref:core/beans/environment.adoc#beans-placeholder-resolution-in-statements[Placeholder Resolution in Statements]
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -55,34 +55,33 @@ The preceding `AppConfig` class is equivalent to the following Spring `<beans/>`
|
||||
</beans>
|
||||
----
|
||||
|
||||
.@Configuration classes with or without local calls between @Bean methods?
|
||||
.Full @Configuration vs "`lite`" @Bean mode?
|
||||
****
|
||||
In common scenarios, `@Bean` methods are to be declared within `@Configuration` classes,
|
||||
ensuring that full configuration class processing applies and that cross-method
|
||||
references therefore get redirected to the container's lifecycle management.
|
||||
This prevents the same `@Bean` method from accidentally being invoked through a regular
|
||||
Java method call, which helps to reduce subtle bugs that can be hard to track down.
|
||||
|
||||
When `@Bean` methods are declared within classes that are not annotated with
|
||||
`@Configuration` - or when `@Configuration(proxyBeanMethods=false)` is declared -,
|
||||
they are referred to as being processed in a "lite" mode. In such scenarios,
|
||||
`@Bean` methods are effectively a general-purpose factory method mechanism without
|
||||
special runtime processing (that is, without generating a CGLIB subclass for it).
|
||||
A custom Java call to such a method will not get intercepted by the container and
|
||||
therefore behaves just like a regular method call, creating a new instance every time
|
||||
rather than reusing an existing singleton (or scoped) instance for the given bean.
|
||||
`@Configuration`, they are referred to as being processed in a "`lite`" mode. Bean methods
|
||||
declared in a `@Component` or even in a plain old class are considered to be "`lite`",
|
||||
with a different primary purpose of the containing class and a `@Bean` method
|
||||
being a sort of bonus there. For example, service components may expose management views
|
||||
to the container through an additional `@Bean` method on each applicable component class.
|
||||
In such scenarios, `@Bean` methods are a general-purpose factory method mechanism.
|
||||
|
||||
As a consequence, `@Bean` methods on classes without runtime proxying are not meant to
|
||||
declare inter-bean dependencies at all. Instead, they are expected to operate on their
|
||||
containing component's fields and, optionally, on arguments that a factory method may
|
||||
declare in order to receive autowired collaborators. Such a `@Bean` method therefore
|
||||
never needs to invoke other `@Bean` methods; every such call can be expressed through
|
||||
a factory method argument instead. The positive side-effect here is that no CGLIB
|
||||
subclassing has to be applied at runtime, reducing the overhead and the footprint.
|
||||
Unlike full `@Configuration`, lite `@Bean` methods cannot declare inter-bean dependencies.
|
||||
Instead, they operate on their containing component's internal state and, optionally, on
|
||||
arguments that they may declare. Such a `@Bean` method should therefore not invoke other
|
||||
`@Bean` methods. Each such method is literally only a factory method for a particular
|
||||
bean reference, without any special runtime semantics. The positive side-effect here is
|
||||
that no CGLIB subclassing has to be applied at runtime, so there are no limitations in
|
||||
terms of class design (that is, the containing class may be `final` and so forth).
|
||||
|
||||
In common scenarios, `@Bean` methods are to be declared within `@Configuration` classes,
|
||||
ensuring that "`full`" mode is always used and that cross-method references therefore
|
||||
get redirected to the container's lifecycle management. This prevents the same
|
||||
`@Bean` method from accidentally being invoked through a regular Java call, which helps
|
||||
to reduce subtle bugs that can be hard to track down when operating in "`lite`" mode.
|
||||
****
|
||||
|
||||
The `@Bean` and `@Configuration` annotations are discussed in depth in the following sections.
|
||||
First, however, we cover the various ways of creating a Spring container by using
|
||||
First, however, we cover the various ways of creating a spring container by using
|
||||
Java-based configuration.
|
||||
|
||||
|
||||
|
||||
@@ -552,7 +552,7 @@ Sometimes, it is helpful to provide a more detailed textual description of a bea
|
||||
be particularly useful when beans are exposed (perhaps through JMX) for monitoring purposes.
|
||||
|
||||
To add a description to a `@Bean`, you can use the
|
||||
{spring-framework-api}/context/annotation/Description.html[`@Description`]
|
||||
{api-spring-framework}/context/annotation/Description.html[`@Description`]
|
||||
annotation, as the following example shows:
|
||||
|
||||
[tabs]
|
||||
|
||||
+4
-4
@@ -225,7 +225,7 @@ Also, be particularly careful with `BeanPostProcessor` and `BeanFactoryPostProce
|
||||
through `@Bean`. Those should usually be declared as `static @Bean` methods, not triggering the
|
||||
instantiation of their containing configuration class. Otherwise, `@Autowired` and `@Value` may not
|
||||
work on the configuration class itself, since it is possible to create it as a bean instance earlier than
|
||||
{spring-framework-api}/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.html[`AutowiredAnnotationBeanPostProcessor`].
|
||||
{api-spring-framework}/beans/factory/annotation/AutowiredAnnotationBeanPostProcessor.html[`AutowiredAnnotationBeanPostProcessor`].
|
||||
====
|
||||
|
||||
The following example shows how one bean can be autowired to another bean:
|
||||
@@ -338,7 +338,7 @@ modularity, but determining exactly where the autowired bean definitions are dec
|
||||
still somewhat ambiguous. For example, as a developer looking at `ServiceConfig`, how do
|
||||
you know exactly where the `@Autowired AccountRepository` bean is declared? It is not
|
||||
explicit in the code, and this may be just fine. Remember that the
|
||||
{spring-site-tools}[Spring Tools for Eclipse] provides tooling that
|
||||
https://spring.io/tools[Spring Tools for Eclipse] provides tooling that
|
||||
can render graphs showing how everything is wired, which may be all you need. Also,
|
||||
your Java IDE can easily find all declarations and uses of the `AccountRepository` type
|
||||
and quickly show you the location of `@Bean` methods that return that type.
|
||||
@@ -519,7 +519,7 @@ profile has been enabled in the Spring `Environment` (see xref:core/beans/enviro
|
||||
for details).
|
||||
|
||||
The `@Profile` annotation is actually implemented by using a much more flexible annotation
|
||||
called {spring-framework-api}/context/annotation/Conditional.html[`@Conditional`].
|
||||
called {api-spring-framework}/context/annotation/Conditional.html[`@Conditional`].
|
||||
The `@Conditional` annotation indicates specific
|
||||
`org.springframework.context.annotation.Condition` implementations that should be
|
||||
consulted before a `@Bean` is registered.
|
||||
@@ -570,7 +570,7 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
See the {spring-framework-api}/context/annotation/Conditional.html[`@Conditional`]
|
||||
See the {api-spring-framework}/context/annotation/Conditional.html[`@Conditional`]
|
||||
javadoc for more detail.
|
||||
|
||||
|
||||
|
||||
@@ -278,7 +278,7 @@ init-param):
|
||||
|
||||
NOTE: For programmatic use cases, a `GenericWebApplicationContext` can be used as an
|
||||
alternative to `AnnotationConfigWebApplicationContext`. See the
|
||||
{spring-framework-api}/web/context/support/GenericWebApplicationContext.html[`GenericWebApplicationContext`]
|
||||
{api-spring-framework}/web/context/support/GenericWebApplicationContext.html[`GenericWebApplicationContext`]
|
||||
javadoc for details.
|
||||
|
||||
|
||||
|
||||
@@ -56,7 +56,7 @@ alternate between read and write.
|
||||
== `PooledDataBuffer`
|
||||
|
||||
As explained in the Javadoc for
|
||||
{java-api}/java.base/java/nio/ByteBuffer.html[ByteBuffer],
|
||||
https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html[ByteBuffer],
|
||||
byte buffers can be direct or non-direct. Direct buffers may reside outside the Java heap
|
||||
which eliminates the need for copying for native I/O operations. That makes direct buffers
|
||||
particularly useful for receiving and sending data over a socket, but they're also more
|
||||
|
||||
@@ -1,18 +1,17 @@
|
||||
[[expressions]]
|
||||
= Spring Expression Language (SpEL)
|
||||
|
||||
The Spring Expression Language ("SpEL" for short) is a powerful expression language that
|
||||
The Spring Expression Language ("`SpEL`" for short) is a powerful expression language that
|
||||
supports querying and manipulating an object graph at runtime. The language syntax is
|
||||
similar to the https://jakarta.ee/specifications/expression-language/[Jakarta Expression
|
||||
Language] but offers additional features, most notably method invocation and basic string
|
||||
templating functionality.
|
||||
similar to Unified EL but offers additional features, most notably method invocation and
|
||||
basic string templating functionality.
|
||||
|
||||
While there are several other Java expression languages available -- OGNL, MVEL, and JBoss
|
||||
EL, to name a few -- the Spring Expression Language was created to provide the Spring
|
||||
community with a single well supported expression language that can be used across all
|
||||
the products in the Spring portfolio. Its language features are driven by the
|
||||
requirements of the projects in the Spring portfolio, including tooling requirements
|
||||
for code completion support within the {spring-site-tools}[Spring Tools for Eclipse].
|
||||
for code completion support within the https://spring.io/tools[Spring Tools for Eclipse].
|
||||
That said, SpEL is based on a technology-agnostic API that lets other expression language
|
||||
implementations be integrated, should the need arise.
|
||||
|
||||
@@ -34,24 +33,24 @@ populate them are listed at the end of the chapter.
|
||||
The expression language supports the following functionality:
|
||||
|
||||
* Literal expressions
|
||||
* Boolean and relational operators
|
||||
* Regular expressions
|
||||
* Class expressions
|
||||
* Accessing properties, arrays, lists, and maps
|
||||
* Method invocation
|
||||
* Assignment
|
||||
* Calling constructors
|
||||
* Bean references
|
||||
* Array construction
|
||||
* Inline lists
|
||||
* Inline maps
|
||||
* Array construction
|
||||
* Relational operators
|
||||
* Regular expressions
|
||||
* Logical operators
|
||||
* String operators
|
||||
* Mathematical operators
|
||||
* Assignment
|
||||
* Type expressions
|
||||
* Method invocation
|
||||
* Constructor invocation
|
||||
* Ternary operator
|
||||
* Variables
|
||||
* User-defined functions
|
||||
* Bean references
|
||||
* Ternary, Elvis, and safe-navigation operators
|
||||
* Collection projection
|
||||
* Collection selection
|
||||
* Templated expressions
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -1,12 +1,12 @@
|
||||
[[expressions-evaluation]]
|
||||
= Evaluation
|
||||
|
||||
This section introduces programmatic use of SpEL's interfaces and its expression language.
|
||||
The complete language reference can be found in the
|
||||
This section introduces the simple use of SpEL interfaces and its expression language.
|
||||
The complete language reference can be found in
|
||||
xref:core/expressions/language-ref.adoc[Language Reference].
|
||||
|
||||
The following code demonstrates how to use the SpEL API to evaluate the literal string
|
||||
expression, `Hello World`.
|
||||
The following code introduces the SpEL API to evaluate the literal string expression,
|
||||
`Hello World`.
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -18,7 +18,7 @@ Java::
|
||||
Expression exp = parser.parseExpression("'Hello World'"); // <1>
|
||||
String message = (String) exp.getValue();
|
||||
----
|
||||
<1> The value of the message variable is `"Hello World"`.
|
||||
<1> The value of the message variable is `'Hello World'`.
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
@@ -28,24 +28,24 @@ Kotlin::
|
||||
val exp = parser.parseExpression("'Hello World'") // <1>
|
||||
val message = exp.value as String
|
||||
----
|
||||
<1> The value of the message variable is `"Hello World"`.
|
||||
<1> The value of the message variable is `'Hello World'`.
|
||||
======
|
||||
|
||||
|
||||
The SpEL classes and interfaces you are most likely to use are located in the
|
||||
`org.springframework.expression` package and its sub-packages, such as `spel.support`.
|
||||
|
||||
The `ExpressionParser` interface is responsible for parsing an expression string. In the
|
||||
preceding example, the expression string is a string literal denoted by the surrounding
|
||||
single quotation marks. The `Expression` interface is responsible for evaluating the
|
||||
defined expression string. The two types of exceptions that can be thrown when calling
|
||||
`parser.parseExpression(...)` and `exp.getValue(...)` are `ParseException` and
|
||||
`EvaluationException`, respectively.
|
||||
The `ExpressionParser` interface is responsible for parsing an expression string. In
|
||||
the preceding example, the expression string is a string literal denoted by the surrounding single
|
||||
quotation marks. The `Expression` interface is responsible for evaluating the previously defined
|
||||
expression string. Two exceptions that can be thrown, `ParseException` and
|
||||
`EvaluationException`, when calling `parser.parseExpression` and `exp.getValue`,
|
||||
respectively.
|
||||
|
||||
SpEL supports a wide range of features such as calling methods, accessing properties,
|
||||
SpEL supports a wide range of features, such as calling methods, accessing properties,
|
||||
and calling constructors.
|
||||
|
||||
In the following method invocation example, we call the `concat` method on the string
|
||||
literal, `Hello World`.
|
||||
In the following example of method invocation, we call the `concat` method on the string literal:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -57,7 +57,7 @@ Java::
|
||||
Expression exp = parser.parseExpression("'Hello World'.concat('!')"); // <1>
|
||||
String message = (String) exp.getValue();
|
||||
----
|
||||
<1> The value of `message` is now `"Hello World!"`.
|
||||
<1> The value of `message` is now 'Hello World!'.
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
@@ -67,11 +67,10 @@ Kotlin::
|
||||
val exp = parser.parseExpression("'Hello World'.concat('!')") // <1>
|
||||
val message = exp.value as String
|
||||
----
|
||||
<1> The value of `message` is now `"Hello World!"`.
|
||||
<1> The value of `message` is now 'Hello World!'.
|
||||
======
|
||||
|
||||
The following example demonstrates how to access the `Bytes` JavaBean property of the
|
||||
string literal, `Hello World`.
|
||||
The following example of calling a JavaBean property calls the `String` property `Bytes`:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -101,10 +100,10 @@ Kotlin::
|
||||
======
|
||||
|
||||
SpEL also supports nested properties by using the standard dot notation (such as
|
||||
`prop1.prop2.prop3`) as well as the corresponding setting of property values.
|
||||
`prop1.prop2.prop3`) and also the corresponding setting of property values.
|
||||
Public fields may also be accessed.
|
||||
|
||||
The following example shows how to use dot notation to get the length of a string literal.
|
||||
The following example shows how to use dot notation to get the length of a literal:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -134,7 +133,7 @@ Kotlin::
|
||||
======
|
||||
|
||||
The String's constructor can be called instead of using a string literal, as the following
|
||||
example shows.
|
||||
example shows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -146,7 +145,7 @@ Java::
|
||||
Expression exp = parser.parseExpression("new String('hello world').toUpperCase()"); // <1>
|
||||
String message = exp.getValue(String.class);
|
||||
----
|
||||
<1> Construct a new `String` from the literal and convert it to upper case.
|
||||
<1> Construct a new `String` from the literal and make it be upper case.
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
@@ -156,9 +155,10 @@ Kotlin::
|
||||
val exp = parser.parseExpression("new String('hello world').toUpperCase()") // <1>
|
||||
val message = exp.getValue(String::class.java)
|
||||
----
|
||||
<1> Construct a new `String` from the literal and convert it to upper case.
|
||||
<1> Construct a new `String` from the literal and make it be upper case.
|
||||
======
|
||||
|
||||
|
||||
Note the use of the generic method: `public <T> T getValue(Class<T> desiredResultType)`.
|
||||
Using this method removes the need to cast the value of the expression to the desired
|
||||
result type. An `EvaluationException` is thrown if the value cannot be cast to the
|
||||
@@ -166,8 +166,8 @@ type `T` or converted by using the registered type converter.
|
||||
|
||||
The more common usage of SpEL is to provide an expression string that is evaluated
|
||||
against a specific object instance (called the root object). The following example shows
|
||||
how to retrieve the `name` property from an instance of the `Inventor` class and how to
|
||||
reference the `name` property in a boolean expression.
|
||||
how to retrieve the `name` property from an instance of the `Inventor` class or
|
||||
create a boolean condition:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -240,7 +240,7 @@ It excludes Java type references, constructors, and bean references. It also req
|
||||
you to explicitly choose the level of support for properties and methods in expressions.
|
||||
By default, the `create()` static factory method enables only read access to properties.
|
||||
You can also obtain a builder to configure the exact level of support needed, targeting
|
||||
one or some combination of the following.
|
||||
one or some combination of the following:
|
||||
|
||||
* Custom `PropertyAccessor` only (no reflection)
|
||||
* Data binding properties for read-only access
|
||||
@@ -252,15 +252,16 @@ one or some combination of the following.
|
||||
|
||||
By default, SpEL uses the conversion service available in Spring core
|
||||
(`org.springframework.core.convert.ConversionService`). This conversion service comes
|
||||
with many built-in converters for common conversions, but is also fully extensible so
|
||||
that you can add custom conversions between types. Additionally, it is generics-aware.
|
||||
This means that, when you work with generic types in expressions, SpEL attempts
|
||||
conversions to maintain type correctness for any objects it encounters.
|
||||
with many built-in converters for common conversions but is also fully extensible so that
|
||||
you can add custom conversions between types. Additionally, it is
|
||||
generics-aware. This means that, when you work with generic types in
|
||||
expressions, SpEL attempts conversions to maintain type correctness for any objects
|
||||
it encounters.
|
||||
|
||||
What does this mean in practice? Suppose assignment, using `setValue()`, is being used
|
||||
to set a `List` property. The type of the property is actually `List<Boolean>`. SpEL
|
||||
recognizes that the elements of the list need to be converted to `Boolean` before
|
||||
being placed in it. The following example shows how to do so.
|
||||
being placed in it. The following example shows how to do so:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -324,7 +325,7 @@ constructor before setting the specified value. If the element type does not hav
|
||||
default constructor, `null` will be added to the array or list. If there is no built-in
|
||||
or custom converter that knows how to set the value, `null` will remain in the array or
|
||||
list at the specified index. The following example demonstrates how to automatically grow
|
||||
the list.
|
||||
the list:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -379,25 +380,16 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
By default, a SpEL expression cannot contain more than 10,000 characters; however, the
|
||||
`maxExpressionLength` is configurable. If you create a `SpelExpressionParser`
|
||||
programmatically, you can specify a custom `maxExpressionLength` when creating the
|
||||
`SpelParserConfiguration` that you provide to the `SpelExpressionParser`. If you wish to
|
||||
set the `maxExpressionLength` used for parsing SpEL expressions within an
|
||||
`ApplicationContext` -- for example, in XML bean definitions, `@Value`, etc. -- you can
|
||||
set a JVM system property or Spring property named `spring.context.expression.maxLength`
|
||||
to the maximum expression length needed by your application (see
|
||||
xref:appendix.adoc#appendix-spring-properties[Supported Spring Properties]).
|
||||
|
||||
|
||||
[[expressions-spel-compilation]]
|
||||
== SpEL Compilation
|
||||
|
||||
Spring provides a basic compiler for SpEL expressions. Expressions are usually
|
||||
interpreted, which provides a lot of dynamic flexibility during evaluation but does not
|
||||
provide optimum performance. For occasional expression usage, this is fine, but, when
|
||||
used by other components such as Spring Integration, performance can be very important,
|
||||
and there is no real need for the dynamism.
|
||||
Spring Framework 4.1 includes a basic expression compiler. Expressions are usually
|
||||
interpreted, which provides a lot of dynamic flexibility during evaluation but
|
||||
does not provide optimum performance. For occasional expression usage,
|
||||
this is fine, but, when used by other components such as Spring Integration,
|
||||
performance can be very important, and there is no real need for the dynamism.
|
||||
|
||||
The SpEL compiler is intended to address this need. During evaluation, the compiler
|
||||
generates a Java class that embodies the expression behavior at runtime and uses that
|
||||
@@ -410,17 +402,16 @@ information can cause trouble later if the types of the various expression eleme
|
||||
change over time. For this reason, compilation is best suited to expressions whose
|
||||
type information is not going to change on repeated evaluations.
|
||||
|
||||
Consider the following basic expression.
|
||||
Consider the following basic expression:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
someArray[0].someProperty.someOtherProperty < 0.1
|
||||
someArray[0].someProperty.someOtherProperty < 0.1
|
||||
----
|
||||
|
||||
Because the preceding expression involves array access, some property de-referencing, and
|
||||
numeric operations, the performance gain can be very noticeable. In an example micro
|
||||
benchmark run of 50,000 iterations, it took 75ms to evaluate by using the interpreter and
|
||||
only 3ms using the compiled version of the expression.
|
||||
Because the preceding expression involves array access, some property de-referencing,
|
||||
and numeric operations, the performance gain can be very noticeable. In an example
|
||||
micro benchmark run of 50000 iterations, it took 75ms to evaluate by using the
|
||||
interpreter and only 3ms using the compiled version of the expression.
|
||||
|
||||
|
||||
[[expressions-compiler-configuration]]
|
||||
@@ -428,34 +419,33 @@ only 3ms using the compiled version of the expression.
|
||||
|
||||
The compiler is not turned on by default, but you can turn it on in either of two
|
||||
different ways. You can turn it on by using the parser configuration process
|
||||
(xref:core/expressions/evaluation.adoc#expressions-parser-configuration[discussed
|
||||
earlier]) or by using a Spring property when SpEL usage is embedded inside another
|
||||
component. This section discusses both of these options.
|
||||
(xref:core/expressions/evaluation.adoc#expressions-parser-configuration[discussed earlier]) or by using a Spring property
|
||||
when SpEL usage is embedded inside another component. This section discusses both of
|
||||
these options.
|
||||
|
||||
The compiler can operate in one of three modes, which are captured in the
|
||||
`org.springframework.expression.spel.SpelCompilerMode` enum. The modes are as follows.
|
||||
`org.springframework.expression.spel.SpelCompilerMode` enum. The modes are as follows:
|
||||
|
||||
* `OFF` (default): The compiler is switched off.
|
||||
* `IMMEDIATE`: In immediate mode, the expressions are compiled as soon as possible. This
|
||||
is typically after the first interpreted evaluation. If the compiled expression fails
|
||||
(typically due to a type changing, as described earlier), the caller of the expression
|
||||
evaluation receives an exception.
|
||||
* `MIXED`: In mixed mode, the expressions silently switch between interpreted and
|
||||
compiled mode over time. After some number of interpreted runs, they switch to compiled
|
||||
form and, if something goes wrong with the compiled form (such as a type changing, as
|
||||
described earlier), the expression automatically switches back to interpreted form
|
||||
again. Sometime later, it may generate another compiled form and switch to it.
|
||||
Basically, the exception that the user gets in `IMMEDIATE` mode is instead handled
|
||||
internally.
|
||||
is typically after the first interpreted evaluation. If the compiled expression fails
|
||||
(typically due to a type changing, as described earlier), the caller of the expression
|
||||
evaluation receives an exception.
|
||||
* `MIXED`: In mixed mode, the expressions silently switch between interpreted and compiled
|
||||
mode over time. After some number of interpreted runs, they switch to compiled
|
||||
form and, if something goes wrong with the compiled form (such as a type changing, as
|
||||
described earlier), the expression automatically switches back to interpreted form
|
||||
again. Sometime later, it may generate another compiled form and switch to it. Basically,
|
||||
the exception that the user gets in `IMMEDIATE` mode is instead handled internally.
|
||||
|
||||
`IMMEDIATE` mode exists because `MIXED` mode could cause issues for expressions that
|
||||
have side effects. If a compiled expression blows up after partially succeeding, it
|
||||
may have already done something that has affected the state of the system. If this
|
||||
has happened, the caller may not want it to silently re-run in interpreted mode,
|
||||
since part of the expression may be run twice.
|
||||
since part of the expression may be running twice.
|
||||
|
||||
After selecting a mode, use the `SpelParserConfiguration` to configure the parser. The
|
||||
following example shows how to do so.
|
||||
following example shows how to do so:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -492,16 +482,15 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
When you specify the compiler mode, you can also specify a `ClassLoader` (passing `null`
|
||||
is allowed). Compiled expressions are defined in a child `ClassLoader` created under any
|
||||
that is supplied. It is important to ensure that, if a `ClassLoader` is specified, it can
|
||||
see all the types involved in the expression evaluation process. If you do not specify a
|
||||
`ClassLoader`, a default `ClassLoader` is used (typically the context `ClassLoader` for
|
||||
the thread that is running during expression evaluation).
|
||||
When you specify the compiler mode, you can also specify a classloader (passing null is allowed).
|
||||
Compiled expressions are defined in a child classloader created under any that is supplied.
|
||||
It is important to ensure that, if a classloader is specified, it can see all the types involved in
|
||||
the expression evaluation process. If you do not specify a classloader, a default classloader is used
|
||||
(typically the context classloader for the thread that is running during expression evaluation).
|
||||
|
||||
The second way to configure the compiler is for use when SpEL is embedded inside some
|
||||
other component and it may not be possible to configure it through a configuration
|
||||
object. In such cases, it is possible to set the `spring.expression.compiler.mode`
|
||||
object. In these cases, it is possible to set the `spring.expression.compiler.mode`
|
||||
property via a JVM system property (or via the
|
||||
xref:appendix.adoc#appendix-spring-properties[`SpringProperties`] mechanism) to one of the
|
||||
`SpelCompilerMode` enum values (`off`, `immediate`, or `mixed`).
|
||||
@@ -510,16 +499,18 @@ xref:appendix.adoc#appendix-spring-properties[`SpringProperties`] mechanism) to
|
||||
[[expressions-compiler-limitations]]
|
||||
=== Compiler Limitations
|
||||
|
||||
Spring does not support compiling every kind of expression. The primary focus is on
|
||||
common expressions that are likely to be used in performance-critical contexts. The
|
||||
following kinds of expressions cannot be compiled.
|
||||
Since Spring Framework 4.1, the basic compilation framework is in place. However, the framework
|
||||
does not yet support compiling every kind of expression. The initial focus has been on the
|
||||
common expressions that are likely to be used in performance-critical contexts. The following
|
||||
kinds of expression cannot be compiled at the moment:
|
||||
|
||||
* Expressions involving assignment
|
||||
* Expressions relying on the conversion service
|
||||
* Expressions using custom resolvers or accessors
|
||||
* Expressions using overloaded operators
|
||||
* Expressions using array construction syntax
|
||||
* Expressions using selection or projection
|
||||
|
||||
Compilation of additional kinds of expressions may be supported in the future.
|
||||
More types of expressions will be compilable in the future.
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -3,11 +3,9 @@
|
||||
|
||||
This section lists the classes used in the examples throughout this chapter.
|
||||
|
||||
== `Inventor`
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
Inventor.Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
|
||||
----
|
||||
@@ -82,7 +80,7 @@ Java::
|
||||
}
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
Inventor.kt::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
|
||||
----
|
||||
@@ -97,11 +95,9 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
== `PlaceOfBirth`
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
PlaceOfBirth.java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
|
||||
----
|
||||
@@ -139,7 +135,7 @@ Java::
|
||||
}
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
PlaceOfBirth.kt::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
|
||||
----
|
||||
@@ -149,11 +145,9 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
== `Society`
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
Society.java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
|
||||
----
|
||||
@@ -198,7 +192,7 @@ Java::
|
||||
}
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
Society.kt::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
|
||||
----
|
||||
|
||||
@@ -2,4 +2,24 @@
|
||||
= Language Reference
|
||||
:page-section-summary-toc: 1
|
||||
|
||||
This section describes how the Spring Expression Language works.
|
||||
This section describes how the Spring Expression Language works. It covers the following
|
||||
topics:
|
||||
|
||||
* xref:core/expressions/language-ref/literal.adoc[Literal Expressions]
|
||||
* xref:core/expressions/language-ref/properties-arrays.adoc[Properties, Arrays, Lists, Maps, and Indexers]
|
||||
* xref:core/expressions/language-ref/inline-lists.adoc[Inline Lists]
|
||||
* xref:core/expressions/language-ref/inline-maps.adoc[Inline Maps]
|
||||
* xref:core/expressions/language-ref/array-construction.adoc[Array Construction]
|
||||
* xref:core/expressions/language-ref/methods.adoc[Methods]
|
||||
* xref:core/expressions/language-ref/operators.adoc[Operators]
|
||||
* xref:core/expressions/language-ref/types.adoc[Types]
|
||||
* xref:core/expressions/language-ref/constructors.adoc[Constructors]
|
||||
* xref:core/expressions/language-ref/variables.adoc[Variables]
|
||||
* xref:core/expressions/language-ref/functions.adoc[Functions]
|
||||
* xref:core/expressions/language-ref/bean-references.adoc[Bean References]
|
||||
* xref:core/expressions/language-ref/operator-ternary.adoc[Ternary Operator (If-Then-Else)]
|
||||
* xref:core/expressions/language-ref/operator-elvis.adoc[The Elvis Operator]
|
||||
* xref:core/expressions/language-ref/operator-safe-navigation.adoc[Safe Navigation Operator]
|
||||
|
||||
|
||||
|
||||
|
||||
+4
-12
@@ -13,7 +13,7 @@ Java::
|
||||
int[] numbers1 = (int[]) parser.parseExpression("new int[4]").getValue(context);
|
||||
|
||||
// Array with initializer
|
||||
int[] numbers2 = (int[]) parser.parseExpression("new int[] {1, 2, 3}").getValue(context);
|
||||
int[] numbers2 = (int[]) parser.parseExpression("new int[]{1,2,3}").getValue(context);
|
||||
|
||||
// Multi dimensional array
|
||||
int[][] numbers3 = (int[][]) parser.parseExpression("new int[4][5]").getValue(context);
|
||||
@@ -26,22 +26,14 @@ Kotlin::
|
||||
val numbers1 = parser.parseExpression("new int[4]").getValue(context) as IntArray
|
||||
|
||||
// Array with initializer
|
||||
val numbers2 = parser.parseExpression("new int[] {1, 2, 3}").getValue(context) as IntArray
|
||||
val numbers2 = parser.parseExpression("new int[]{1,2,3}").getValue(context) as IntArray
|
||||
|
||||
// Multi dimensional array
|
||||
val numbers3 = parser.parseExpression("new int[4][5]").getValue(context) as Array<IntArray>
|
||||
----
|
||||
======
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
You cannot currently supply an initializer when you construct a multi-dimensional array.
|
||||
====
|
||||
|
||||
[CAUTION]
|
||||
====
|
||||
Any expression that constructs an array – for example, via `new int[4]` or
|
||||
`new int[] {1, 2, 3}` – cannot be compiled. See
|
||||
xref:core/expressions/evaluation.adoc#expressions-compiler-limitations[Compiler Limitations]
|
||||
for details.
|
||||
====
|
||||
|
||||
|
||||
|
||||
+2
-9
@@ -13,7 +13,7 @@ Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
// evaluates to ["Smiljan", "Idvor"]
|
||||
// evaluates to ["SmilJan", "Idvor"]
|
||||
List placesOfBirth = parser.parseExpression("members.![placeOfBirth.city]")
|
||||
.getValue(societyContext, List.class);
|
||||
----
|
||||
@@ -22,7 +22,7 @@ Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
// evaluates to ["Smiljan", "Idvor"]
|
||||
// evaluates to ["SmilJan", "Idvor"]
|
||||
val placesOfBirth = parser.parseExpression("members.![placeOfBirth.city]")
|
||||
.getValue(societyContext) as List<*>
|
||||
----
|
||||
@@ -34,12 +34,5 @@ evaluated against each entry in the map (represented as a Java `Map.Entry`). The
|
||||
of a projection across a map is a list that consists of the evaluation of the projection
|
||||
expression against each map entry.
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
The Spring Expression Language also supports safe navigation for collection projection.
|
||||
|
||||
See
|
||||
xref:core/expressions/language-ref/operator-safe-navigation.adoc#expressions-operator-safe-navigation-selection-and-projection[Safe Collection Selection and Projection]
|
||||
for details.
|
||||
====
|
||||
|
||||
|
||||
-7
@@ -59,12 +59,5 @@ the last element. To obtain the first element matching the selection expression,
|
||||
syntax is `.^[selectionExpression]`. To obtain the last element matching the selection
|
||||
expression, the syntax is `.$[selectionExpression]`.
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
The Spring Expression Language also supports safe navigation for collection selection.
|
||||
|
||||
See
|
||||
xref:core/expressions/language-ref/operator-safe-navigation.adoc#expressions-operator-safe-navigation-selection-and-projection[Safe Collection Selection and Projection]
|
||||
for details.
|
||||
====
|
||||
|
||||
|
||||
@@ -1,26 +1,9 @@
|
||||
[[expressions-ref-functions]]
|
||||
= Functions
|
||||
|
||||
You can extend SpEL by registering user-defined functions that can be called within
|
||||
expressions by using the `#functionName(...)` syntax. Functions can be registered as
|
||||
variables in `EvaluationContext` implementations via the `setVariable()` method.
|
||||
|
||||
[TIP]
|
||||
====
|
||||
`StandardEvaluationContext` also defines `registerFunction(...)` methods that provide a
|
||||
convenient way to register a function as a `java.lang.reflect.Method` or a
|
||||
`java.lang.invoke.MethodHandle`.
|
||||
====
|
||||
|
||||
[WARNING]
|
||||
====
|
||||
Since functions share a common namespace with
|
||||
xref:core/expressions/language-ref/variables.adoc[variables] in the evaluation context,
|
||||
care must be taken to ensure that function names and variable names do not overlap.
|
||||
====
|
||||
|
||||
The following example shows how to register a user-defined function to be invoked via
|
||||
reflection using a `java.lang.reflect.Method`:
|
||||
You can extend SpEL by registering user-defined functions that can be called within the
|
||||
expression string. The function is registered through the `EvaluationContext`. The
|
||||
following example shows how to register a user-defined function:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -56,7 +39,11 @@ Java::
|
||||
public abstract class StringUtils {
|
||||
|
||||
public static String reverseString(String input) {
|
||||
return new StringBuilder(input).reverse().toString();
|
||||
StringBuilder backwards = new StringBuilder(input.length());
|
||||
for (int i = 0; i < input.length(); i++) {
|
||||
backwards.append(input.charAt(input.length() - 1 - i));
|
||||
}
|
||||
return backwards.toString();
|
||||
}
|
||||
}
|
||||
----
|
||||
@@ -66,12 +53,16 @@ Kotlin::
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
fun reverseString(input: String): String {
|
||||
return StringBuilder(input).reverse().toString()
|
||||
val backwards = StringBuilder(input.length)
|
||||
for (i in 0 until input.length) {
|
||||
backwards.append(input[input.length - 1 - i])
|
||||
}
|
||||
return backwards.toString()
|
||||
}
|
||||
----
|
||||
======
|
||||
|
||||
You can register and use the preceding method, as the following example shows:
|
||||
You can then register and use the preceding method, as the following example shows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -83,9 +74,8 @@ Java::
|
||||
|
||||
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataBinding().build();
|
||||
context.setVariable("reverseString",
|
||||
StringUtils.class.getMethod("reverseString", String.class));
|
||||
StringUtils.class.getDeclaredMethod("reverseString", String.class));
|
||||
|
||||
// evaluates to "olleh"
|
||||
String helloWorldReversed = parser.parseExpression(
|
||||
"#reverseString('hello')").getValue(context, String.class);
|
||||
----
|
||||
@@ -97,108 +87,12 @@ Kotlin::
|
||||
val parser = SpelExpressionParser()
|
||||
|
||||
val context = SimpleEvaluationContext.forReadOnlyDataBinding().build()
|
||||
context.setVariable("reverseString", ::reverseString.javaMethod)
|
||||
context.setVariable("reverseString", ::reverseString::javaMethod)
|
||||
|
||||
// evaluates to "olleh"
|
||||
val helloWorldReversed = parser.parseExpression(
|
||||
"#reverseString('hello')").getValue(context, String::class.java)
|
||||
----
|
||||
======
|
||||
|
||||
A function can also be registered as a `java.lang.invoke.MethodHandle`. This enables
|
||||
potentially more efficient use cases if the `MethodHandle` target and parameters have
|
||||
been fully bound prior to registration; however, partially bound handles are also
|
||||
supported.
|
||||
|
||||
Consider the `String#formatted(String, Object...)` instance method, which produces a
|
||||
message according to a template and a variable number of arguments.
|
||||
|
||||
You can register and use the `formatted` method as a `MethodHandle`, as the following
|
||||
example shows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataBinding().build();
|
||||
|
||||
MethodHandle mh = MethodHandles.lookup().findVirtual(String.class, "formatted",
|
||||
MethodType.methodType(String.class, Object[].class));
|
||||
context.setVariable("message", mh);
|
||||
|
||||
// evaluates to "Simple message: <Hello World>"
|
||||
String message = parser.parseExpression("#message('Simple message: <%s>', 'Hello World', 'ignored')")
|
||||
.getValue(context, String.class);
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val parser = SpelExpressionParser()
|
||||
val context = SimpleEvaluationContext.forReadOnlyDataBinding().build()
|
||||
|
||||
val mh = MethodHandles.lookup().findVirtual(String::class.java, "formatted",
|
||||
MethodType.methodType(String::class.java, Array<Any>::class.java))
|
||||
context.setVariable("message", mh)
|
||||
|
||||
// evaluates to "Simple message: <Hello World>"
|
||||
val message = parser.parseExpression("#message('Simple message: <%s>', 'Hello World', 'ignored')")
|
||||
.getValue(context, String::class.java)
|
||||
----
|
||||
======
|
||||
|
||||
As hinted above, binding a `MethodHandle` and registering the bound `MethodHandle` is also
|
||||
supported. This is likely to be more performant if both the target and all the arguments
|
||||
are bound. In that case no arguments are necessary in the SpEL expression, as the
|
||||
following example shows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataBinding().build();
|
||||
|
||||
String template = "This is a %s message with %s words: <%s>";
|
||||
Object varargs = new Object[] { "prerecorded", 3, "Oh Hello World!", "ignored" };
|
||||
MethodHandle mh = MethodHandles.lookup().findVirtual(String.class, "formatted",
|
||||
MethodType.methodType(String.class, Object[].class))
|
||||
.bindTo(template)
|
||||
.bindTo(varargs); //here we have to provide arguments in a single array binding
|
||||
context.setVariable("message", mh);
|
||||
|
||||
// evaluates to "This is a prerecorded message with 3 words: <Oh Hello World!>"
|
||||
String message = parser.parseExpression("#message()")
|
||||
.getValue(context, String.class);
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val parser = SpelExpressionParser()
|
||||
val context = SimpleEvaluationContext.forReadOnlyDataBinding().build()
|
||||
|
||||
val template = "This is a %s message with %s words: <%s>"
|
||||
val varargs = arrayOf("prerecorded", 3, "Oh Hello World!", "ignored")
|
||||
|
||||
val mh = MethodHandles.lookup().findVirtual(String::class.java, "formatted",
|
||||
MethodType.methodType(String::class.java, Array<Any>::class.java))
|
||||
.bindTo(template)
|
||||
.bindTo(varargs) //here we have to provide arguments in a single array binding
|
||||
context.setVariable("message", mh)
|
||||
|
||||
// evaluates to "This is a prerecorded message with 3 words: <Oh Hello World!>"
|
||||
val message = parser.parseExpression("#message()")
|
||||
.getValue(context, String::class.java)
|
||||
----
|
||||
======
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -3,46 +3,20 @@
|
||||
|
||||
SpEL supports the following types of literal expressions.
|
||||
|
||||
String ::
|
||||
Strings can be delimited by single quotation marks (`'`) or double quotation marks
|
||||
(`"`). To include a single quotation mark within a string literal enclosed in single
|
||||
quotation marks, use two adjacent single quotation mark characters. Similarly, to
|
||||
include a double quotation mark within a string literal enclosed in double quotation
|
||||
marks, use two adjacent double quotation mark characters.
|
||||
Number ::
|
||||
Numbers support the use of the negative sign, exponential notation, and decimal points.
|
||||
* Integer: `int` or `long`
|
||||
* Hexadecimal: `int` or `long`
|
||||
* Real: `float` or `double`
|
||||
** By default, real numbers are parsed using `Double.parseDouble()`.
|
||||
Boolean ::
|
||||
`true` or `false`
|
||||
Null ::
|
||||
`null`
|
||||
- strings
|
||||
- numeric values: integer (`int` or `long`), hexadecimal (`int` or `long`), real (`float`
|
||||
or `double`)
|
||||
- boolean values: `true` or `false`
|
||||
- null
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
Due to the design and implementation of the Spring Expression Language, literal numbers
|
||||
are always stored internally as positive numbers.
|
||||
Strings can delimited by single quotation marks (`'`) or double quotation marks (`"`). To
|
||||
include a single quotation mark within a string literal enclosed in single quotation
|
||||
marks, use two adjacent single quotation mark characters. Similarly, to include a double
|
||||
quotation mark within a string literal enclosed in double quotation marks, use two
|
||||
adjacent double quotation mark characters.
|
||||
|
||||
For example, `-2` is stored internally as a positive `2` which is then negated while
|
||||
evaluating the expression (by calculating the value of `0 - 2`).
|
||||
|
||||
This means that it is not possible to represent a negative literal number equal to the
|
||||
minimum value of that type of number in Java. For example, the minimum supported value
|
||||
for an `int` in Java is `Integer.MIN_VALUE` which has a value of `-2147483648`. However,
|
||||
if you include `-2147483648` in a SpEL expression, an exception will be thrown informing
|
||||
you that the value `2147483648` cannot be parsed as an `int` (because it exceeds the
|
||||
value of `Integer.MAX_VALUE` which is `2147483647`).
|
||||
|
||||
If you need to use the minimum value for a particular type of number within a SpEL
|
||||
expression, you can either reference the `MIN_VALUE` constant for the respective wrapper
|
||||
type (such as `Integer.MIN_VALUE`, `Long.MIN_VALUE`, etc.) or calculate the minimum
|
||||
value. For example, to use the minimum integer value:
|
||||
|
||||
- `T(Integer).MIN_VALUE` -- requires a `StandardEvaluationContext`
|
||||
- `-2^31` -- can be used with any type of `EvaluationContext`
|
||||
====
|
||||
Numbers support the use of the negative sign, exponential notation, and decimal points.
|
||||
By default, real numbers are parsed by using `Double.parseDouble()`.
|
||||
|
||||
The following listing shows simple usage of literals. Typically, they are not used in
|
||||
isolation like this but, rather, as part of a more complex expression -- for example,
|
||||
|
||||
@@ -38,10 +38,6 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
NOTE: The SpEL Elvis operator also checks for _empty_ Strings in addition to `null` objects.
|
||||
The original snippet is thus only close to emulating the semantics of the operator (it would need an
|
||||
additional `!name.isEmpty()` check).
|
||||
|
||||
The following listing shows a more complex example:
|
||||
|
||||
[tabs]
|
||||
@@ -57,7 +53,7 @@ Java::
|
||||
String name = parser.parseExpression("name?:'Elvis Presley'").getValue(context, tesla, String.class);
|
||||
System.out.println(name); // Nikola Tesla
|
||||
|
||||
tesla.setName("");
|
||||
tesla.setName(null);
|
||||
name = parser.parseExpression("name?:'Elvis Presley'").getValue(context, tesla, String.class);
|
||||
System.out.println(name); // Elvis Presley
|
||||
----
|
||||
@@ -73,7 +69,7 @@ Kotlin::
|
||||
var name = parser.parseExpression("name?:'Elvis Presley'").getValue(context, tesla, String::class.java)
|
||||
println(name) // Nikola Tesla
|
||||
|
||||
tesla.setName("")
|
||||
tesla.setName(null)
|
||||
name = parser.parseExpression("name?:'Elvis Presley'").getValue(context, tesla, String::class.java)
|
||||
println(name) // Elvis Presley
|
||||
----
|
||||
|
||||
+14
-326
@@ -1,27 +1,12 @@
|
||||
[[expressions-operator-safe-navigation]]
|
||||
= Safe Navigation Operator
|
||||
|
||||
The safe navigation operator (`?`) is used to avoid a `NullPointerException` and comes
|
||||
from the https://www.groovy-lang.org/operators.html#_safe_navigation_operator[Groovy]
|
||||
language. Typically, when you have a reference to an object, you might need to verify
|
||||
that it is not `null` before accessing methods or properties of the object. To avoid
|
||||
this, the safe navigation operator returns `null` for the particular null-safe operation
|
||||
instead of throwing an exception.
|
||||
|
||||
[WARNING]
|
||||
====
|
||||
When the safe navigation operator evaluates to `null` for a particular null-safe
|
||||
operation within a compound expression, the remainder of the compound expression will
|
||||
still be evaluated.
|
||||
|
||||
See <<expressions-operator-safe-navigation-compound-expressions>> for details.
|
||||
====
|
||||
|
||||
[[expressions-operator-safe-navigation-property-access]]
|
||||
== Safe Property and Method Access
|
||||
|
||||
The following example shows how to use the safe navigation operator for property access
|
||||
(`?.`).
|
||||
The safe navigation operator is used to avoid a `NullPointerException` and comes from
|
||||
the https://www.groovy-lang.org/operators.html#_safe_navigation_operator[Groovy]
|
||||
language. Typically, when you have a reference to an object, you might need to verify that
|
||||
it is not null before accessing methods or properties of the object. To avoid this, the
|
||||
safe navigation operator returns null instead of throwing an exception. The following
|
||||
example shows how to use the safe navigation operator:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -35,18 +20,13 @@ Java::
|
||||
Inventor tesla = new Inventor("Nikola Tesla", "Serbian");
|
||||
tesla.setPlaceOfBirth(new PlaceOfBirth("Smiljan"));
|
||||
|
||||
// evaluates to "Smiljan"
|
||||
String city = parser.parseExpression("placeOfBirth?.city") // <1>
|
||||
.getValue(context, tesla, String.class);
|
||||
String city = parser.parseExpression("placeOfBirth?.city").getValue(context, tesla, String.class);
|
||||
System.out.println(city); // Smiljan
|
||||
|
||||
tesla.setPlaceOfBirth(null);
|
||||
|
||||
// evaluates to null - does not throw NullPointerException
|
||||
city = parser.parseExpression("placeOfBirth?.city") // <2>
|
||||
.getValue(context, tesla, String.class);
|
||||
city = parser.parseExpression("placeOfBirth?.city").getValue(context, tesla, String.class);
|
||||
System.out.println(city); // null - does not throw NullPointerException!!!
|
||||
----
|
||||
<1> Use safe navigation operator on non-null `placeOfBirth` property
|
||||
<2> Use safe navigation operator on null `placeOfBirth` property
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
@@ -58,306 +38,14 @@ Kotlin::
|
||||
val tesla = Inventor("Nikola Tesla", "Serbian")
|
||||
tesla.setPlaceOfBirth(PlaceOfBirth("Smiljan"))
|
||||
|
||||
// evaluates to "Smiljan"
|
||||
var city = parser.parseExpression("placeOfBirth?.city") // <1>
|
||||
.getValue(context, tesla, String::class.java)
|
||||
var city = parser.parseExpression("placeOfBirth?.city").getValue(context, tesla, String::class.java)
|
||||
println(city) // Smiljan
|
||||
|
||||
tesla.setPlaceOfBirth(null)
|
||||
|
||||
// evaluates to null - does not throw NullPointerException
|
||||
city = parser.parseExpression("placeOfBirth?.city") // <2>
|
||||
.getValue(context, tesla, String::class.java)
|
||||
city = parser.parseExpression("placeOfBirth?.city").getValue(context, tesla, String::class.java)
|
||||
println(city) // null - does not throw NullPointerException!!!
|
||||
----
|
||||
<1> Use safe navigation operator on non-null `placeOfBirth` property
|
||||
<2> Use safe navigation operator on null `placeOfBirth` property
|
||||
======
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
The safe navigation operator also applies to method invocations on an object.
|
||||
|
||||
For example, the expression `#calculator?.max(4, 2)` evaluates to `null` if the
|
||||
`#calculator` variable has not been configured in the context. Otherwise, the
|
||||
`max(int, int)` method will be invoked on the `#calculator`.
|
||||
====
|
||||
|
||||
|
||||
[[expressions-operator-safe-navigation-selection-and-projection]]
|
||||
== Safe Collection Selection and Projection
|
||||
|
||||
The Spring Expression Language supports safe navigation for
|
||||
xref:core/expressions/language-ref/collection-selection.adoc[collection selection] and
|
||||
xref:core/expressions/language-ref/collection-projection.adoc[collection projection] via
|
||||
the following operators.
|
||||
|
||||
* null-safe selection: `?.?`
|
||||
* null-safe select first: `?.^`
|
||||
* null-safe select last: `?.$`
|
||||
* null-safe projection: `?.!`
|
||||
|
||||
The following example shows how to use the safe navigation operator for collection
|
||||
selection (`?.?`).
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
IEEE society = new IEEE();
|
||||
StandardEvaluationContext context = new StandardEvaluationContext(society);
|
||||
String expression = "members?.?[nationality == 'Serbian']"; // <1>
|
||||
|
||||
// evaluates to [Inventor("Nikola Tesla")]
|
||||
List<Inventor> list = (List<Inventor>) parser.parseExpression(expression)
|
||||
.getValue(context);
|
||||
|
||||
society.members = null;
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
list = (List<Inventor>) parser.parseExpression(expression)
|
||||
.getValue(context);
|
||||
----
|
||||
<1> Use null-safe selection operator on potentially null `members` list
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val parser = SpelExpressionParser()
|
||||
val society = IEEE()
|
||||
val context = StandardEvaluationContext(society)
|
||||
val expression = "members?.?[nationality == 'Serbian']" // <1>
|
||||
|
||||
// evaluates to [Inventor("Nikola Tesla")]
|
||||
var list = parser.parseExpression(expression)
|
||||
.getValue(context) as List<Inventor>
|
||||
|
||||
society.members = null
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
list = parser.parseExpression(expression)
|
||||
.getValue(context) as List<Inventor>
|
||||
----
|
||||
<1> Use null-safe selection operator on potentially null `members` list
|
||||
======
|
||||
|
||||
The following example shows how to use the "null-safe select first" operator for
|
||||
collections (`?.^`).
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
IEEE society = new IEEE();
|
||||
StandardEvaluationContext context = new StandardEvaluationContext(society);
|
||||
String expression =
|
||||
"members?.^[nationality == 'Serbian' || nationality == 'Idvor']"; // <1>
|
||||
|
||||
// evaluates to Inventor("Nikola Tesla")
|
||||
Inventor inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor.class);
|
||||
|
||||
society.members = null;
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor.class);
|
||||
----
|
||||
<1> Use "null-safe select first" operator on potentially null `members` list
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val parser = SpelExpressionParser()
|
||||
val society = IEEE()
|
||||
val context = StandardEvaluationContext(society)
|
||||
val expression =
|
||||
"members?.^[nationality == 'Serbian' || nationality == 'Idvor']" // <1>
|
||||
|
||||
// evaluates to Inventor("Nikola Tesla")
|
||||
var inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor::class.java)
|
||||
|
||||
society.members = null
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor::class.java)
|
||||
----
|
||||
<1> Use "null-safe select first" operator on potentially null `members` list
|
||||
======
|
||||
|
||||
|
||||
The following example shows how to use the "null-safe select last" operator for
|
||||
collections (`?.$`).
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
IEEE society = new IEEE();
|
||||
StandardEvaluationContext context = new StandardEvaluationContext(society);
|
||||
String expression =
|
||||
"members?.$[nationality == 'Serbian' || nationality == 'Idvor']"; // <1>
|
||||
|
||||
// evaluates to Inventor("Pupin")
|
||||
Inventor inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor.class);
|
||||
|
||||
society.members = null;
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor.class);
|
||||
----
|
||||
<1> Use "null-safe select last" operator on potentially null `members` list
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val parser = SpelExpressionParser()
|
||||
val society = IEEE()
|
||||
val context = StandardEvaluationContext(society)
|
||||
val expression =
|
||||
"members?.$[nationality == 'Serbian' || nationality == 'Idvor']" // <1>
|
||||
|
||||
// evaluates to Inventor("Pupin")
|
||||
var inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor::class.java)
|
||||
|
||||
society.members = null
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
inventor = parser.parseExpression(expression)
|
||||
.getValue(context, Inventor::class.java)
|
||||
----
|
||||
<1> Use "null-safe select last" operator on potentially null `members` list
|
||||
======
|
||||
|
||||
The following example shows how to use the safe navigation operator for collection
|
||||
projection (`?.!`).
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
IEEE society = new IEEE();
|
||||
StandardEvaluationContext context = new StandardEvaluationContext(society);
|
||||
|
||||
// evaluates to ["Smiljan", "Idvor"]
|
||||
List placesOfBirth = parser.parseExpression("members?.![placeOfBirth.city]") // <1>
|
||||
.getValue(context, List.class);
|
||||
|
||||
society.members = null;
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
placesOfBirth = parser.parseExpression("members?.![placeOfBirth.city]") // <2>
|
||||
.getValue(context, List.class);
|
||||
----
|
||||
<1> Use null-safe projection operator on non-null `members` list
|
||||
<2> Use null-safe projection operator on null `members` list
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val parser = SpelExpressionParser()
|
||||
val society = IEEE()
|
||||
val context = StandardEvaluationContext(society)
|
||||
|
||||
// evaluates to ["Smiljan", "Idvor"]
|
||||
var placesOfBirth = parser.parseExpression("members?.![placeOfBirth.city]") // <1>
|
||||
.getValue(context, List::class.java)
|
||||
|
||||
society.members = null
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
placesOfBirth = parser.parseExpression("members?.![placeOfBirth.city]") // <2>
|
||||
.getValue(context, List::class.java)
|
||||
----
|
||||
<1> Use null-safe projection operator on non-null `members` list
|
||||
<2> Use null-safe projection operator on null `members` list
|
||||
======
|
||||
|
||||
|
||||
[[expressions-operator-safe-navigation-compound-expressions]]
|
||||
== Null-safe Operations in Compound Expressions
|
||||
|
||||
As mentioned at the beginning of this section, when the safe navigation operator
|
||||
evaluates to `null` for a particular null-safe operation within a compound expression,
|
||||
the remainder of the compound expression will still be evaluated. This means that the
|
||||
safe navigation operator must be applied throughout a compound expression in order to
|
||||
avoid any unwanted `NullPointerException`.
|
||||
|
||||
Given the expression `#person?.address.city`, if `#person` is `null` the safe navigation
|
||||
operator (`?.`) ensures that no exception will be thrown when attempting to access the
|
||||
`address` property of `#person`. However, since `#person?.address` evaluates to `null`, a
|
||||
`NullPointerException` will be thrown when attempting to access the `city` property of
|
||||
`null`. To address that, you can apply null-safe navigation throughout the compound
|
||||
expression as in `#person?.address?.city`. That expression will safely evaluate to `null`
|
||||
if either `#person` or `#person?.address` evaluates to `null`.
|
||||
|
||||
The following example demonstrates how to use the "null-safe select first" operator
|
||||
(`?.^`) on a collection combined with null-safe property access (`?.`) within a compound
|
||||
expression. If `members` is `null`, the result of the "null-safe select first" operator
|
||||
(`members?.^[nationality == 'Serbian']`) evaluates to `null`, and the additional use of
|
||||
the safe navigation operator (`?.name`) ensures that the entire compound expression
|
||||
evaluates to `null` instead of throwing an exception.
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
IEEE society = new IEEE();
|
||||
StandardEvaluationContext context = new StandardEvaluationContext(society);
|
||||
String expression = "members?.^[nationality == 'Serbian']?.name"; // <1>
|
||||
|
||||
// evaluates to "Nikola Tesla"
|
||||
String name = parser.parseExpression(expression)
|
||||
.getValue(context, String.class);
|
||||
|
||||
society.members = null;
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
name = parser.parseExpression(expression)
|
||||
.getValue(context, String.class);
|
||||
----
|
||||
<1> Use "null-safe select first" and null-safe property access operators within compound expression.
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val parser = SpelExpressionParser()
|
||||
val society = IEEE()
|
||||
val context = StandardEvaluationContext(society)
|
||||
val expression = "members?.^[nationality == 'Serbian']?.name" // <1>
|
||||
|
||||
// evaluates to "Nikola Tesla"
|
||||
String name = parser.parseExpression(expression)
|
||||
.getValue(context, String::class.java)
|
||||
|
||||
society.members = null
|
||||
|
||||
// evaluates to null - does not throw a NullPointerException
|
||||
name = parser.parseExpression(expression)
|
||||
.getValue(context, String::class.java)
|
||||
----
|
||||
<1> Use "null-safe select first" and null-safe property access operators within compound expression.
|
||||
======
|
||||
|
||||
@@ -5,11 +5,8 @@ The Spring Expression Language supports the following kinds of operators:
|
||||
|
||||
* xref:core/expressions/language-ref/operators.adoc#expressions-operators-relational[Relational Operators]
|
||||
* xref:core/expressions/language-ref/operators.adoc#expressions-operators-logical[Logical Operators]
|
||||
* xref:core/expressions/language-ref/operators.adoc#expressions-operators-string[String Operators]
|
||||
* xref:core/expressions/language-ref/operators.adoc#expressions-operators-mathematical[Mathematical Operators]
|
||||
* xref:core/expressions/language-ref/operators.adoc#expressions-assignment[The Assignment Operator]
|
||||
* xref:core/expressions/language-ref/operators.adoc#expressions-operators-overloaded[Overloaded Operators]
|
||||
|
||||
|
||||
|
||||
[[expressions-operators-relational]]
|
||||
@@ -18,7 +15,7 @@ The Spring Expression Language supports the following kinds of operators:
|
||||
The relational operators (equal, not equal, less than, less than or equal, greater than,
|
||||
and greater than or equal) are supported by using standard operator notation.
|
||||
These operators work on `Number` types as well as types implementing `Comparable`.
|
||||
The following listing shows a few examples of relational operators:
|
||||
The following listing shows a few examples of operators:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -68,22 +65,8 @@ If you prefer numeric comparisons instead, avoid number-based `null` comparisons
|
||||
in favor of comparisons against zero (for example, `X > 0` or `X < 0`).
|
||||
====
|
||||
|
||||
Each symbolic operator can also be specified as a purely textual equivalent. This avoids
|
||||
problems where the symbols used have special meaning for the document type in which the
|
||||
expression is embedded (such as in an XML document). The textual equivalents are:
|
||||
|
||||
* `lt` (`<`)
|
||||
* `gt` (`>`)
|
||||
* `le` (`\<=`)
|
||||
* `ge` (`>=`)
|
||||
* `eq` (`==`)
|
||||
* `ne` (`!=`)
|
||||
|
||||
All of the textual operators are case-insensitive.
|
||||
|
||||
In addition to the standard relational operators, SpEL supports the `between`,
|
||||
`instanceof`, and regular expression-based `matches` operators. The following listing
|
||||
shows examples of all three:
|
||||
In addition to the standard relational operators, SpEL supports the `instanceof` and regular
|
||||
expression-based `matches` operator. The following listing shows examples of both:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -91,38 +74,16 @@ Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
boolean result;
|
||||
|
||||
// evaluates to true
|
||||
result = parser.parseExpression(
|
||||
"1 between {1, 5}").getValue(Boolean.class);
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
"1 between {10, 15}").getValue(Boolean.class);
|
||||
|
||||
// evaluates to true
|
||||
result = parser.parseExpression(
|
||||
"'elephant' between {'aardvark', 'zebra'}").getValue(Boolean.class);
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
"'elephant' between {'aardvark', 'cobra'}").getValue(Boolean.class);
|
||||
|
||||
// evaluates to true
|
||||
result = parser.parseExpression(
|
||||
"123 instanceof T(Integer)").getValue(Boolean.class);
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
boolean falseValue = parser.parseExpression(
|
||||
"'xyz' instanceof T(Integer)").getValue(Boolean.class);
|
||||
|
||||
// evaluates to true
|
||||
result = parser.parseExpression(
|
||||
boolean trueValue = parser.parseExpression(
|
||||
"'5.00' matches '^-?\\d+(\\.\\d{2})?$'").getValue(Boolean.class);
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
boolean falseValue = parser.parseExpression(
|
||||
"'5.0067' matches '^-?\\d+(\\.\\d{2})?$'").getValue(Boolean.class);
|
||||
----
|
||||
|
||||
@@ -130,65 +91,50 @@ Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
// evaluates to true
|
||||
var result = parser.parseExpression(
|
||||
"1 between {1, 5}").getValue(Boolean::class.java)
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
"1 between {10, 15}").getValue(Boolean::class.java)
|
||||
|
||||
// evaluates to true
|
||||
result = parser.parseExpression(
|
||||
"'elephant' between {'aardvark', 'zebra'}").getValue(Boolean::class.java)
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
"'elephant' between {'aardvark', 'cobra'}").getValue(Boolean::class.java)
|
||||
|
||||
// evaluates to true
|
||||
result = parser.parseExpression(
|
||||
"123 instanceof T(Integer)").getValue(Boolean::class.java)
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
val falseValue = parser.parseExpression(
|
||||
"'xyz' instanceof T(Integer)").getValue(Boolean::class.java)
|
||||
|
||||
// evaluates to true
|
||||
result = parser.parseExpression(
|
||||
val trueValue = parser.parseExpression(
|
||||
"'5.00' matches '^-?\\d+(\\.\\d{2})?$'").getValue(Boolean::class.java)
|
||||
|
||||
// evaluates to false
|
||||
result = parser.parseExpression(
|
||||
val falseValue = parser.parseExpression(
|
||||
"'5.0067' matches '^-?\\d+(\\.\\d{2})?$'").getValue(Boolean::class.java)
|
||||
----
|
||||
======
|
||||
|
||||
[CAUTION]
|
||||
====
|
||||
The syntax for the `between` operator is `<input> between {<range_begin>, <range_end>}`,
|
||||
which is effectively a shortcut for `<input> >= <range_begin> && <input> \<= <range_end>}`.
|
||||
|
||||
Consequently, `1 between {1, 5}` evaluates to `true`, while `1 between {5, 1}` evaluates
|
||||
to `false`.
|
||||
====
|
||||
|
||||
CAUTION: Be careful with primitive types, as they are immediately boxed up to their
|
||||
wrapper types. For example, `1 instanceof T(int)` evaluates to `false`, while
|
||||
`1 instanceof T(Integer)` evaluates to `true`.
|
||||
`1 instanceof T(Integer)` evaluates to `true`, as expected.
|
||||
|
||||
Each symbolic operator can also be specified as a purely alphabetic equivalent. This
|
||||
avoids problems where the symbols used have special meaning for the document type in
|
||||
which the expression is embedded (such as in an XML document). The textual equivalents are:
|
||||
|
||||
* `lt` (`<`)
|
||||
* `gt` (`>`)
|
||||
* `le` (`\<=`)
|
||||
* `ge` (`>=`)
|
||||
* `eq` (`==`)
|
||||
* `ne` (`!=`)
|
||||
* `div` (`/`)
|
||||
* `mod` (`%`)
|
||||
* `not` (`!`).
|
||||
|
||||
All of the textual operators are case-insensitive.
|
||||
|
||||
|
||||
[[expressions-operators-logical]]
|
||||
== Logical Operators
|
||||
|
||||
SpEL supports the following logical (`boolean`) operators:
|
||||
SpEL supports the following logical operators:
|
||||
|
||||
* `and` (`&&`)
|
||||
* `or` (`||`)
|
||||
* `not` (`!`)
|
||||
|
||||
All of the textual operators are case-insensitive.
|
||||
|
||||
The following example shows how to use the logical operators:
|
||||
|
||||
[tabs]
|
||||
@@ -221,7 +167,6 @@ Java::
|
||||
boolean falseValue = parser.parseExpression("!true").getValue(Boolean.class);
|
||||
|
||||
// -- AND and NOT --
|
||||
|
||||
String expression = "isMember('Nikola Tesla') and !isMember('Mihajlo Pupin')";
|
||||
boolean falseValue = parser.parseExpression(expression).getValue(societyContext, Boolean.class);
|
||||
----
|
||||
@@ -254,105 +199,20 @@ Kotlin::
|
||||
val falseValue = parser.parseExpression("!true").getValue(Boolean::class.java)
|
||||
|
||||
// -- AND and NOT --
|
||||
|
||||
val expression = "isMember('Nikola Tesla') and !isMember('Mihajlo Pupin')"
|
||||
val falseValue = parser.parseExpression(expression).getValue(societyContext, Boolean::class.java)
|
||||
----
|
||||
======
|
||||
|
||||
|
||||
[[expressions-operators-string]]
|
||||
== String Operators
|
||||
|
||||
You can use the following operators on strings.
|
||||
|
||||
* concatenation (`+`)
|
||||
* subtraction (`-`)
|
||||
- for use with a string containing a single character
|
||||
* repeat (`*`)
|
||||
|
||||
The following example shows the `String` operators in use:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
// -- Concatenation --
|
||||
|
||||
// evaluates to "hello world"
|
||||
String helloWorld = parser.parseExpression("'hello' + ' ' + 'world'")
|
||||
.getValue(String.class);
|
||||
|
||||
// -- Character Subtraction --
|
||||
|
||||
// evaluates to 'a'
|
||||
char ch = parser.parseExpression("'d' - 3")
|
||||
.getValue(char.class);
|
||||
|
||||
// -- Repeat --
|
||||
|
||||
// evaluates to "abcabc"
|
||||
String repeated = parser.parseExpression("'abc' * 2")
|
||||
.getValue(String.class);
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
// -- Concatenation --
|
||||
|
||||
// evaluates to "hello world"
|
||||
val helloWorld = parser.parseExpression("'hello' + ' ' + 'world'")
|
||||
.getValue(String::class.java)
|
||||
|
||||
// -- Character Subtraction --
|
||||
|
||||
// evaluates to 'a'
|
||||
val ch = parser.parseExpression("'d' - 3")
|
||||
.getValue(Character::class.java);
|
||||
|
||||
// -- Repeat --
|
||||
|
||||
// evaluates to "abcabc"
|
||||
val repeated = parser.parseExpression("'abc' * 2")
|
||||
.getValue(String::class.java);
|
||||
----
|
||||
======
|
||||
|
||||
[[expressions-operators-mathematical]]
|
||||
== Mathematical Operators
|
||||
|
||||
You can use the following operators on numbers, and standard operator precedence is enforced.
|
||||
|
||||
* addition (`+`)
|
||||
* subtraction (`-`)
|
||||
* increment (`{pp}`)
|
||||
* decrement (`--`)
|
||||
* multiplication (`*`)
|
||||
* division (`/`)
|
||||
* modulus (`%`)
|
||||
* exponential power (`^`)
|
||||
|
||||
The division and modulus operators can also be specified as a purely textual equivalent.
|
||||
This avoids problems where the symbols used have special meaning for the document type in
|
||||
which the expression is embedded (such as in an XML document). The textual equivalents
|
||||
are:
|
||||
|
||||
* `div` (`/`)
|
||||
* `mod` (`%`)
|
||||
|
||||
All of the textual operators are case-insensitive.
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
The increment and decrement operators can be used with either prefix (`{pp}A`, `--A`) or
|
||||
postfix (`A{pp}`, `A--`) notation with variables or properties that can be written to.
|
||||
====
|
||||
|
||||
The following example shows the mathematical operators in use:
|
||||
You can use the addition operator (`+`) on both numbers and strings. You can use the
|
||||
subtraction (`-`), multiplication (`*`), and division (`/`) operators only on numbers.
|
||||
You can also use the modulus (`%`) and exponential power (`^`) operators on numbers.
|
||||
Standard operator precedence is enforced. The following example shows the mathematical
|
||||
operators in use:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -360,131 +220,67 @@ Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
Inventor inventor = new Inventor();
|
||||
EvaluationContext context = SimpleEvaluationContext.forReadWriteDataBinding().build();
|
||||
// Addition
|
||||
int two = parser.parseExpression("1 + 1").getValue(Integer.class); // 2
|
||||
|
||||
// -- Addition --
|
||||
String testString = parser.parseExpression(
|
||||
"'test' + ' ' + 'string'").getValue(String.class); // 'test string'
|
||||
|
||||
int two = parser.parseExpression("1 + 1").getValue(int.class); // 2
|
||||
// Subtraction
|
||||
int four = parser.parseExpression("1 - -3").getValue(Integer.class); // 4
|
||||
|
||||
// -- Subtraction --
|
||||
double d = parser.parseExpression("1000.00 - 1e4").getValue(Double.class); // -9000
|
||||
|
||||
int four = parser.parseExpression("1 - -3").getValue(int.class); // 4
|
||||
// Multiplication
|
||||
int six = parser.parseExpression("-2 * -3").getValue(Integer.class); // 6
|
||||
|
||||
double d = parser.parseExpression("1000.00 - 1e4").getValue(double.class); // -9000
|
||||
double twentyFour = parser.parseExpression("2.0 * 3e0 * 4").getValue(Double.class); // 24.0
|
||||
|
||||
// -- Increment --
|
||||
// Division
|
||||
int minusTwo = parser.parseExpression("6 / -3").getValue(Integer.class); // -2
|
||||
|
||||
// The counter property in Inventor has an initial value of 0.
|
||||
double one = parser.parseExpression("8.0 / 4e0 / 2").getValue(Double.class); // 1.0
|
||||
|
||||
// evaluates to 2; counter is now 1
|
||||
two = parser.parseExpression("counter++ + 2").getValue(context, inventor, int.class);
|
||||
// Modulus
|
||||
int three = parser.parseExpression("7 % 4").getValue(Integer.class); // 3
|
||||
|
||||
// evaluates to 5; counter is now 2
|
||||
int five = parser.parseExpression("3 + ++counter").getValue(context, inventor, int.class);
|
||||
int one = parser.parseExpression("8 / 5 % 2").getValue(Integer.class); // 1
|
||||
|
||||
// -- Decrement --
|
||||
|
||||
// The counter property in Inventor has a value of 2.
|
||||
|
||||
// evaluates to 6; counter is now 1
|
||||
int six = parser.parseExpression("counter-- + 4").getValue(context, inventor, int.class);
|
||||
|
||||
// evaluates to 5; counter is now 0
|
||||
five = parser.parseExpression("5 + --counter").getValue(context, inventor, int.class);
|
||||
|
||||
// -- Multiplication --
|
||||
|
||||
six = parser.parseExpression("-2 * -3").getValue(int.class); // 6
|
||||
|
||||
double twentyFour = parser.parseExpression("2.0 * 3e0 * 4").getValue(double.class); // 24.0
|
||||
|
||||
// -- Division --
|
||||
|
||||
int minusTwo = parser.parseExpression("6 / -3").getValue(int.class); // -2
|
||||
|
||||
double one = parser.parseExpression("8.0 / 4e0 / 2").getValue(double.class); // 1.0
|
||||
|
||||
// -- Modulus --
|
||||
|
||||
int three = parser.parseExpression("7 % 4").getValue(int.class); // 3
|
||||
|
||||
int oneInt = parser.parseExpression("8 / 5 % 2").getValue(int.class); // 1
|
||||
|
||||
// -- Exponential power --
|
||||
|
||||
int maxInt = parser.parseExpression("(2^31) - 1").getValue(int.class); // Integer.MAX_VALUE
|
||||
|
||||
int minInt = parser.parseExpression("-2^31").getValue(int.class); // Integer.MIN_VALUE
|
||||
|
||||
// -- Operator precedence --
|
||||
|
||||
int minusTwentyOne = parser.parseExpression("1+2-3*8").getValue(int.class); // -21
|
||||
// Operator precedence
|
||||
int minusTwentyOne = parser.parseExpression("1+2-3*8").getValue(Integer.class); // -21
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val inventor = Inventor()
|
||||
val context = SimpleEvaluationContext.forReadWriteDataBinding().build()
|
||||
// Addition
|
||||
val two = parser.parseExpression("1 + 1").getValue(Int::class.java) // 2
|
||||
|
||||
// -- Addition --
|
||||
|
||||
var two = parser.parseExpression("1 + 1").getValue(Int::class.java) // 2
|
||||
|
||||
// -- Subtraction --
|
||||
val testString = parser.parseExpression(
|
||||
"'test' + ' ' + 'string'").getValue(String::class.java) // 'test string'
|
||||
|
||||
// Subtraction
|
||||
val four = parser.parseExpression("1 - -3").getValue(Int::class.java) // 4
|
||||
|
||||
val d = parser.parseExpression("1000.00 - 1e4").getValue(Double::class.java) // -9000
|
||||
|
||||
// -- Increment --
|
||||
|
||||
// The counter property in Inventor has an initial value of 0.
|
||||
|
||||
// evaluates to 2; counter is now 1
|
||||
two = parser.parseExpression("counter++ + 2").getValue(context, inventor, Int::class.java)
|
||||
|
||||
// evaluates to 5; counter is now 2
|
||||
var five = parser.parseExpression("3 + ++counter").getValue(context, inventor, Int::class.java)
|
||||
|
||||
// -- Decrement --
|
||||
|
||||
// The counter property in Inventor has a value of 2.
|
||||
|
||||
// evaluates to 6; counter is now 1
|
||||
var six = parser.parseExpression("counter-- + 4").getValue(context, inventor, Int::class.java)
|
||||
|
||||
// evaluates to 5; counter is now 0
|
||||
five = parser.parseExpression("5 + --counter").getValue(context, inventor, Int::class.java)
|
||||
|
||||
// -- Multiplication --
|
||||
|
||||
six = parser.parseExpression("-2 * -3").getValue(Int::class.java) // 6
|
||||
// Multiplication
|
||||
val six = parser.parseExpression("-2 * -3").getValue(Int::class.java) // 6
|
||||
|
||||
val twentyFour = parser.parseExpression("2.0 * 3e0 * 4").getValue(Double::class.java) // 24.0
|
||||
|
||||
// -- Division --
|
||||
|
||||
// Division
|
||||
val minusTwo = parser.parseExpression("6 / -3").getValue(Int::class.java) // -2
|
||||
|
||||
val one = parser.parseExpression("8.0 / 4e0 / 2").getValue(Double::class.java) // 1.0
|
||||
|
||||
// -- Modulus --
|
||||
|
||||
// Modulus
|
||||
val three = parser.parseExpression("7 % 4").getValue(Int::class.java) // 3
|
||||
|
||||
val oneInt = parser.parseExpression("8 / 5 % 2").getValue(Int::class.java) // 1
|
||||
|
||||
// -- Exponential power --
|
||||
|
||||
val maxInt = parser.parseExpression("(2^31) - 1").getValue(Int::class.java) // Integer.MAX_VALUE
|
||||
|
||||
val minInt = parser.parseExpression("-2^31").getValue(Int::class.java) // Integer.MIN_VALUE
|
||||
|
||||
// -- Operator precedence --
|
||||
val one = parser.parseExpression("8 / 5 % 2").getValue(Int::class.java) // 1
|
||||
|
||||
// Operator precedence
|
||||
val minusTwentyOne = parser.parseExpression("1+2-3*8").getValue(Int::class.java) // -21
|
||||
----
|
||||
======
|
||||
@@ -529,83 +325,3 @@ Kotlin::
|
||||
======
|
||||
|
||||
|
||||
[[expressions-operators-overloaded]]
|
||||
== Overloaded Operators
|
||||
|
||||
By default, the mathematical operations defined in SpEL's `Operation` enum (`ADD`,
|
||||
`SUBTRACT`, `DIVIDE`, `MULTIPLY`, `MODULUS`, and `POWER`) support simple types like
|
||||
numbers. By providing an implementation of `OperatorOverloader`, the expression language
|
||||
can support these operations on other types.
|
||||
|
||||
For example, if we want to overload the `ADD` operator to allow two lists to be
|
||||
concatenated using the `+` sign, we can implement a custom `OperatorOverloader` as
|
||||
follows.
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
pubic class ListConcatenation implements OperatorOverloader {
|
||||
|
||||
@Override
|
||||
public boolean overridesOperation(Operation operation, Object left, Object right) {
|
||||
return (operation == Operation.ADD &&
|
||||
left instanceof List && right instanceof List);
|
||||
}
|
||||
|
||||
@Override
|
||||
@SuppressWarnings("unchecked")
|
||||
public Object operate(Operation operation, Object left, Object right) {
|
||||
if (operation == Operation.ADD &&
|
||||
left instanceof List list1 && right instanceof List list2) {
|
||||
|
||||
List result = new ArrayList(list1);
|
||||
result.addAll(list2);
|
||||
return result;
|
||||
}
|
||||
throw new UnsupportedOperationException(
|
||||
"No overload for operation %s and operands [%s] and [%s]"
|
||||
.formatted(operation, left, right));
|
||||
}
|
||||
}
|
||||
----
|
||||
|
||||
If we register `ListConcatenation` as the `OperatorOverloader` in a
|
||||
`StandardEvaluationContext`, we can then evaluate expressions like `{1, 2, 3} + {4, 5}`
|
||||
as demonstrated in the following example.
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
StandardEvaluationContext context = new StandardEvaluationContext();
|
||||
context.setOperatorOverloader(new ListConcatenation());
|
||||
|
||||
// evaluates to a new list: [1, 2, 3, 4, 5]
|
||||
parser.parseExpression("{1, 2, 3} + {2 + 2, 5}").getValue(context, List.class);
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
StandardEvaluationContext context = StandardEvaluationContext()
|
||||
context.setOperatorOverloader(ListConcatenation())
|
||||
|
||||
// evaluates to a new list: [1, 2, 3, 4, 5]
|
||||
parser.parseExpression("{1, 2, 3} + {2 + 2, 5}").getValue(context, List::class.java)
|
||||
----
|
||||
======
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
An `OperatorOverloader` does not change the default semantics for an operator. For
|
||||
example, `2 + 2` in the above example still evaluates to `4`.
|
||||
====
|
||||
|
||||
[CAUTION]
|
||||
====
|
||||
Any expression that uses an overloaded operator cannot be compiled. See
|
||||
xref:core/expressions/evaluation.adoc#expressions-compiler-limitations[Compiler Limitations]
|
||||
for details.
|
||||
====
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
[[expressions-templating]]
|
||||
= Expression Templating
|
||||
= Expression templating
|
||||
|
||||
Expression templates allow mixing literal text with one or more evaluation blocks.
|
||||
Each evaluation block is delimited with prefix and suffix characters that you can
|
||||
@@ -32,13 +32,53 @@ Kotlin::
|
||||
======
|
||||
|
||||
The string is evaluated by concatenating the literal text `'random number is '` with the
|
||||
result of evaluating the expression inside the `#{ }` delimiters (in this case, the
|
||||
result of calling that `random()` method). The second argument to the `parseExpression()`
|
||||
method is of the type `ParserContext`. The `ParserContext` interface is used to influence
|
||||
how the expression is parsed in order to support the expression templating functionality.
|
||||
The `TemplateParserContext` used in the previous example resides in the
|
||||
`org.springframework.expression.common` package and is an implementation of the
|
||||
`ParserContext` which by default configures the prefix and suffix to `#{` and `}`,
|
||||
respectively.
|
||||
result of evaluating the expression inside the `#{ }` delimiter (in this case, the result
|
||||
of calling that `random()` method). The second argument to the `parseExpression()` method
|
||||
is of the type `ParserContext`. The `ParserContext` interface is used to influence how
|
||||
the expression is parsed in order to support the expression templating functionality.
|
||||
The definition of `TemplateParserContext` follows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
public class TemplateParserContext implements ParserContext {
|
||||
|
||||
public String getExpressionPrefix() {
|
||||
return "#{";
|
||||
}
|
||||
|
||||
public String getExpressionSuffix() {
|
||||
return "}";
|
||||
}
|
||||
|
||||
public boolean isTemplate() {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
class TemplateParserContext : ParserContext {
|
||||
|
||||
override fun getExpressionPrefix(): String {
|
||||
return "#{"
|
||||
}
|
||||
|
||||
override fun getExpressionSuffix(): String {
|
||||
return "}"
|
||||
}
|
||||
|
||||
override fun isTemplate(): Boolean {
|
||||
return true
|
||||
}
|
||||
}
|
||||
----
|
||||
======
|
||||
|
||||
|
||||
|
||||
@@ -1,41 +1,20 @@
|
||||
[[expressions-ref-variables]]
|
||||
= Variables
|
||||
|
||||
You can reference variables in an expression by using the `#variableName` syntax. Variables
|
||||
are set by using the `setVariable()` method in `EvaluationContext` implementations.
|
||||
You can reference variables in the expression by using the `#variableName` syntax. Variables
|
||||
are set by using the `setVariable` method on `EvaluationContext` implementations.
|
||||
|
||||
[NOTE]
|
||||
====
|
||||
Variable names must be begin with a letter (as defined below), an underscore, or a dollar
|
||||
sign.
|
||||
|
||||
Variable names must be composed of one or more of the following supported types of
|
||||
Valid variable names must be composed of one or more of the following supported
|
||||
characters.
|
||||
|
||||
* letter: any character for which `java.lang.Character.isLetter(char)` returns `true`
|
||||
- This includes letters such as `A` to `Z`, `a` to `z`, `ü`, `ñ`, and `é` as well as
|
||||
letters from other character sets such as Chinese, Japanese, Cyrillic, etc.
|
||||
* digit: `0` to `9`
|
||||
* letters: `A` to `Z` and `a` to `z`
|
||||
* digits: `0` to `9`
|
||||
* underscore: `_`
|
||||
* dollar sign: `$`
|
||||
====
|
||||
|
||||
[TIP]
|
||||
====
|
||||
When setting a variable or root context object in the `EvaluationContext`, it is advised
|
||||
that the type of the variable or root context object be `public`.
|
||||
|
||||
Otherwise, certain types of SpEL expressions involving a variable or root context object
|
||||
with a non-public type may fail to evaluate or compile.
|
||||
====
|
||||
|
||||
[WARNING]
|
||||
====
|
||||
Since variables share a common namespace with
|
||||
xref:core/expressions/language-ref/functions.adoc[functions] in the evaluation context,
|
||||
care must be taken to ensure that variable names and functions names do not overlap.
|
||||
====
|
||||
|
||||
The following example shows how to use variables.
|
||||
|
||||
[tabs]
|
||||
@@ -50,7 +29,7 @@ Java::
|
||||
context.setVariable("newName", "Mike Tesla");
|
||||
|
||||
parser.parseExpression("name = #newName").getValue(context, tesla);
|
||||
System.out.println(tesla.getName()); // "Mike Tesla"
|
||||
System.out.println(tesla.getName()) // "Mike Tesla"
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
@@ -74,10 +53,8 @@ Kotlin::
|
||||
The `#this` variable is always defined and refers to the current evaluation object
|
||||
(against which unqualified references are resolved). The `#root` variable is always
|
||||
defined and refers to the root context object. Although `#this` may vary as components of
|
||||
an expression are evaluated, `#root` always refers to the root.
|
||||
|
||||
The following example shows how to use the `#this` variable in conjunction with
|
||||
xref:core/expressions/language-ref/collection-selection.adoc[collection selection].
|
||||
an expression are evaluated, `#root` always refers to the root. The following examples
|
||||
show how to use the `#this` and `#root` variables:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -85,95 +62,40 @@ Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
// Create a list of prime integers.
|
||||
List<Integer> primes = List.of(2, 3, 5, 7, 11, 13, 17);
|
||||
// create an array of integers
|
||||
List<Integer> primes = new ArrayList<>();
|
||||
primes.addAll(Arrays.asList(2,3,5,7,11,13,17));
|
||||
|
||||
// Create parser and set variable 'primes' as the list of integers.
|
||||
// create parser and set variable 'primes' as the array of integers
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
EvaluationContext context = SimpleEvaluationContext.forReadWriteDataBinding().build();
|
||||
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataAccess();
|
||||
context.setVariable("primes", primes);
|
||||
|
||||
// Select all prime numbers > 10 from the list (using selection ?{...}).
|
||||
String expression = "#primes.?[#this > 10]";
|
||||
|
||||
// Evaluates to a list containing [11, 13, 17].
|
||||
List<Integer> primesGreaterThanTen =
|
||||
parser.parseExpression(expression).getValue(context, List.class);
|
||||
// all prime numbers > 10 from the list (using selection ?{...})
|
||||
// evaluates to [11, 13, 17]
|
||||
List<Integer> primesGreaterThanTen = (List<Integer>) parser.parseExpression(
|
||||
"#primes.?[#this>10]").getValue(context);
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
// Create a list of prime integers.
|
||||
val primes = listOf(2, 3, 5, 7, 11, 13, 17)
|
||||
// create an array of integers
|
||||
val primes = ArrayList<Int>()
|
||||
primes.addAll(listOf(2, 3, 5, 7, 11, 13, 17))
|
||||
|
||||
// Create parser and set variable 'primes' as the list of integers.
|
||||
// create parser and set variable 'primes' as the array of integers
|
||||
val parser = SpelExpressionParser()
|
||||
val context = SimpleEvaluationContext.forReadWriteDataBinding().build()
|
||||
val context = SimpleEvaluationContext.forReadOnlyDataAccess()
|
||||
context.setVariable("primes", primes)
|
||||
|
||||
// Select all prime numbers > 10 from the list (using selection ?{...}).
|
||||
val expression = "#primes.?[#this > 10]"
|
||||
|
||||
// Evaluates to a list containing [11, 13, 17].
|
||||
val primesGreaterThanTen = parser.parseExpression(expression)
|
||||
.getValue(context) as List<Int>
|
||||
// all prime numbers > 10 from the list (using selection ?{...})
|
||||
// evaluates to [11, 13, 17]
|
||||
val primesGreaterThanTen = parser.parseExpression(
|
||||
"#primes.?[#this>10]").getValue(context) as List<Int>
|
||||
----
|
||||
======
|
||||
|
||||
The following example shows how to use the `#this` and `#root` variables together in
|
||||
conjunction with
|
||||
xref:core/expressions/language-ref/collection-projection.adoc[collection projection].
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
// Create parser and evaluation context.
|
||||
ExpressionParser parser = new SpelExpressionParser();
|
||||
EvaluationContext context = SimpleEvaluationContext.forReadWriteDataBinding().build();
|
||||
|
||||
// Create an inventor to use as the root context object.
|
||||
Inventor tesla = new Inventor("Nikola Tesla");
|
||||
tesla.setInventions("Telephone repeater", "Tesla coil transformer");
|
||||
|
||||
// Iterate over all inventions of the Inventor referenced as the #root
|
||||
// object, and generate a list of strings whose contents take the form
|
||||
// "<inventor's name> invented the <invention>." (using projection !{...}).
|
||||
String expression = "#root.inventions.![#root.name + ' invented the ' + #this + '.']";
|
||||
|
||||
// Evaluates to a list containing:
|
||||
// "Nikola Tesla invented the Telephone repeater."
|
||||
// "Nikola Tesla invented the Tesla coil transformer."
|
||||
List<String> results = parser.parseExpression(expression)
|
||||
.getValue(context, tesla, List.class);
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
// Create parser and evaluation context.
|
||||
val parser = SpelExpressionParser()
|
||||
val context = SimpleEvaluationContext.forReadWriteDataBinding().build()
|
||||
|
||||
// Create an inventor to use as the root context object.
|
||||
val tesla = Inventor("Nikola Tesla")
|
||||
tesla.setInventions("Telephone repeater", "Tesla coil transformer")
|
||||
|
||||
// Iterate over all inventions of the Inventor referenced as the #root
|
||||
// object, and generate a list of strings whose contents take the form
|
||||
// "<inventor's name> invented the <invention>." (using projection !{...}).
|
||||
val expression = "#root.inventions.![#root.name + ' invented the ' + #this + '.']"
|
||||
|
||||
// Evaluates to a list containing:
|
||||
// "Nikola Tesla invented the Telephone repeater."
|
||||
// "Nikola Tesla invented the Tesla coil transformer."
|
||||
val results = parser.parseExpression(expression)
|
||||
.getValue(context, tesla, List::class.java)
|
||||
----
|
||||
======
|
||||
|
||||
|
||||
@@ -5,14 +5,14 @@ Although Java does not let you express null-safety with its type system, the Spr
|
||||
provides the following annotations in the `org.springframework.lang` package to let you
|
||||
declare nullability of APIs and fields:
|
||||
|
||||
* {spring-framework-api}/lang/Nullable.html[`@Nullable`]: Annotation to indicate that a
|
||||
* {api-spring-framework}/lang/Nullable.html[`@Nullable`]: Annotation to indicate that a
|
||||
specific parameter, return value, or field can be `null`.
|
||||
* {spring-framework-api}/lang/NonNull.html[`@NonNull`]: Annotation to indicate that a specific
|
||||
* {api-spring-framework}/lang/NonNull.html[`@NonNull`]: Annotation to indicate that a specific
|
||||
parameter, return value, or field cannot be `null` (not needed on parameters, return values,
|
||||
and fields where `@NonNullApi` and `@NonNullFields` apply, respectively).
|
||||
* {spring-framework-api}/lang/NonNullApi.html[`@NonNullApi`]: Annotation at the package level
|
||||
* {api-spring-framework}/lang/NonNullApi.html[`@NonNullApi`]: Annotation at the package level
|
||||
that declares non-null as the default semantics for parameters and return values.
|
||||
* {spring-framework-api}/lang/NonNullFields.html[`@NonNullFields`]: Annotation at the package
|
||||
* {api-spring-framework}/lang/NonNullFields.html[`@NonNullFields`]: Annotation at the package
|
||||
level that declares non-null as the default semantics for fields.
|
||||
|
||||
The Spring Framework itself leverages these annotations, but they can also be used in any
|
||||
@@ -37,7 +37,7 @@ these annotations can be used by an IDE (such as IDEA or Eclipse) to provide use
|
||||
warnings related to null-safety in order to avoid `NullPointerException` at runtime.
|
||||
|
||||
They are also used to make Spring APIs null-safe in Kotlin projects, since Kotlin natively
|
||||
supports {kotlin-docs}/null-safety.html[null-safety]. More details
|
||||
supports https://kotlinlang.org/docs/null-safety.html[null-safety]. More details
|
||||
are available in the xref:languages/kotlin/null-safety.adoc[Kotlin support documentation].
|
||||
|
||||
|
||||
@@ -46,7 +46,7 @@ are available in the xref:languages/kotlin/null-safety.adoc[Kotlin support docum
|
||||
[[jsr-305-meta-annotations]]
|
||||
== JSR-305 meta-annotations
|
||||
|
||||
Spring annotations are meta-annotated with {JSR}305[JSR 305]
|
||||
Spring annotations are meta-annotated with https://jcp.org/en/jsr/detail?id=305[JSR 305]
|
||||
annotations (a dormant but widespread JSR). JSR-305 meta-annotations let tooling vendors
|
||||
like IDEA or Kotlin provide null-safety support in a generic way, without having to
|
||||
hard-code support for Spring annotations.
|
||||
|
||||
@@ -37,7 +37,7 @@ such as a method to check for the existence of the resource being pointed to.
|
||||
Spring's `Resource` interface located in the `org.springframework.core.io.` package is
|
||||
meant to be a more capable interface for abstracting access to low-level resources. The
|
||||
following listing provides an overview of the `Resource` interface. See the
|
||||
{spring-framework-api}/core/io/Resource.html[`Resource`] javadoc for further details.
|
||||
{api-spring-framework}/core/io/Resource.html[`Resource`] javadoc for further details.
|
||||
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
@@ -104,7 +104,7 @@ resource (if the underlying implementation is compatible and supports that
|
||||
functionality).
|
||||
|
||||
Some implementations of the `Resource` interface also implement the extended
|
||||
{spring-framework-api}/core/io/WritableResource.html[`WritableResource`] interface
|
||||
{api-spring-framework}/core/io/WritableResource.html[`WritableResource`] interface
|
||||
for a resource that supports writing to it.
|
||||
|
||||
Spring itself uses the `Resource` abstraction extensively, as an argument type in
|
||||
@@ -143,7 +143,7 @@ Spring includes several built-in `Resource` implementations:
|
||||
|
||||
For a complete list of `Resource` implementations available in Spring, consult the
|
||||
"All Known Implementing Classes" section of the
|
||||
{spring-framework-api}/core/io/Resource.html[`Resource`] javadoc.
|
||||
{api-spring-framework}/core/io/Resource.html[`Resource`] javadoc.
|
||||
|
||||
|
||||
|
||||
@@ -763,7 +763,7 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
See the {spring-framework-api}/context/support/ClassPathXmlApplicationContext.html[`ClassPathXmlApplicationContext`]
|
||||
See the {api-spring-framework}/context/support/ClassPathXmlApplicationContext.html[`ClassPathXmlApplicationContext`]
|
||||
javadoc for details on the various constructors.
|
||||
|
||||
|
||||
@@ -903,7 +903,7 @@ entries in the classpath. When you build JARs with Ant, do not activate the `fil
|
||||
switch of the JAR task. Also, classpath directories may not get exposed based on security
|
||||
policies in some environments -- for example, stand-alone applications on JDK 1.7.0_45
|
||||
and higher (which requires 'Trusted-Library' to be set up in your manifests. See
|
||||
{stackoverflow-questions}/19394570/java-jre-7u45-breaks-classloader-getresources).
|
||||
https://stackoverflow.com/questions/19394570/java-jre-7u45-breaks-classloader-getresources).
|
||||
|
||||
On JDK 9's module path (Jigsaw), Spring's classpath scanning generally works as expected.
|
||||
Putting resources into a dedicated directory is highly recommendable here as well,
|
||||
|
||||
@@ -9,7 +9,7 @@ known as _JUL_ or `java.util.logging`) if neither Log4j 2.x nor SLF4J is availab
|
||||
|
||||
Put Log4j 2.x or Logback (or another SLF4J provider) in your classpath, without any extra
|
||||
bridges, and let the framework auto-adapt to your choice. For further information see the
|
||||
{spring-boot-docs}/features.html#features.logging[Spring
|
||||
https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-logging[Spring
|
||||
Boot Logging Reference Documentation].
|
||||
|
||||
[NOTE]
|
||||
|
||||
@@ -1,57 +1,12 @@
|
||||
[[beans-binding]]
|
||||
= Data Binding
|
||||
|
||||
Data binding is useful for binding user input to a target object where user input is a map
|
||||
with property paths as keys, following xref:beans-beans-conventions[JavaBeans conventions].
|
||||
`DataBinder` is the main class that supports this, and it provides two ways to bind user
|
||||
input:
|
||||
|
||||
- xref:beans-constructor-binding[Constructor binding] - bind user input to a public data
|
||||
constructor, looking up constructor argument values in the user input.
|
||||
- xref:beans-beans[Property binding] - bind user input to setters, matching keys from the
|
||||
user input to properties of the target object structure.
|
||||
|
||||
You can apply both constructor and property binding or only one.
|
||||
|
||||
|
||||
[[beans-constructor-binding]]
|
||||
== Constructor Binding
|
||||
|
||||
To use constructor binding:
|
||||
|
||||
1. Create a `DataBinder` with `null` as the target object.
|
||||
2. Set `targetType` to the target class.
|
||||
3. Call `construct`.
|
||||
|
||||
The target class should have a single public constructor or a single non-public constructor
|
||||
with arguments. If there are multiple constructors, then a default constructor if present
|
||||
is used.
|
||||
|
||||
By default, constructor parameter names are used to look up argument values, but you can
|
||||
configure a `NameResolver`. Spring MVC and WebFlux both rely to allow customizing the name
|
||||
of the value to bind through an `@BindParam` annotation on constructor parameters.
|
||||
|
||||
xref:beans-beans-conventions[Type conversion] is applied as needed to convert user input.
|
||||
If the constructor parameter is an object, it is constructed recursively in the same
|
||||
manner, but through a nested property path. That means constructor binding creates both
|
||||
the target object and any objects it contains.
|
||||
|
||||
Binding and conversion errors are reflected in the `BindingResult` of the `DataBinder`.
|
||||
If the target is created successfully, then `target` is set to the created instance
|
||||
after the call to `construct`.
|
||||
|
||||
|
||||
|
||||
|
||||
[[beans-beans]]
|
||||
== Property Binding with `BeanWrapper`
|
||||
= Bean Manipulation and the `BeanWrapper`
|
||||
|
||||
The `org.springframework.beans` package adheres to the JavaBeans standard.
|
||||
A JavaBean is a class with a default no-argument constructor and that follows
|
||||
a naming convention where (for example) a property named `bingoMadness` would
|
||||
have a setter method `setBingoMadness(..)` and a getter method `getBingoMadness()`. For
|
||||
more information about JavaBeans and the specification, see
|
||||
{java-api}/java.desktop/java/beans/package-summary.html[javabeans].
|
||||
https://docs.oracle.com/javase/8/docs/api/java/beans/package-summary.html[javabeans].
|
||||
|
||||
One quite important class in the beans package is the `BeanWrapper` interface and its
|
||||
corresponding implementation (`BeanWrapperImpl`). As quoted from the javadoc, the
|
||||
@@ -71,7 +26,7 @@ perform actions on that bean, such as setting and retrieving properties.
|
||||
|
||||
|
||||
[[beans-beans-conventions]]
|
||||
=== Setting and Getting Basic and Nested Properties
|
||||
== Setting and Getting Basic and Nested Properties
|
||||
|
||||
Setting and getting properties is done through the `setPropertyValue` and
|
||||
`getPropertyValue` overloaded method variants of `BeanWrapper`. See their Javadoc for
|
||||
@@ -237,7 +192,7 @@ Kotlin::
|
||||
|
||||
|
||||
[[beans-beans-conversion]]
|
||||
== ``PropertyEditor``'s
|
||||
== Built-in `PropertyEditor` Implementations
|
||||
|
||||
Spring uses the concept of a `PropertyEditor` to effect the conversion between an
|
||||
`Object` and a `String`. It can be handy
|
||||
@@ -249,7 +204,7 @@ behavior can be achieved by registering custom editors of type
|
||||
`java.beans.PropertyEditor`. Registering custom editors on a `BeanWrapper` or,
|
||||
alternatively, in a specific IoC container (as mentioned in the previous chapter), gives it
|
||||
the knowledge of how to convert properties to the desired type. For more about
|
||||
`PropertyEditor`, see {java-api}/java.desktop/java/beans/package-summary.html[the javadoc of the `java.beans` package from Oracle].
|
||||
`PropertyEditor`, see https://docs.oracle.com/javase/8/docs/api/java/beans/package-summary.html[the javadoc of the `java.beans` package from Oracle].
|
||||
|
||||
A couple of examples where property editing is used in Spring:
|
||||
|
||||
@@ -355,7 +310,7 @@ com
|
||||
|
||||
Note that you can also use the standard `BeanInfo` JavaBeans mechanism here as well
|
||||
(described to some extent
|
||||
{java-tutorial}/javabeans/advanced/customization.html[here]). The
|
||||
https://docs.oracle.com/javase/tutorial/javabeans/advanced/customization.html[here]). The
|
||||
following example uses the `BeanInfo` mechanism to explicitly register one or more
|
||||
`PropertyEditor` instances with the properties of an associated class:
|
||||
|
||||
@@ -423,7 +378,7 @@ Kotlin::
|
||||
|
||||
|
||||
[[beans-beans-conversion-customeditor-registration]]
|
||||
=== Custom ``PropertyEditor``'s
|
||||
=== Registering Additional Custom `PropertyEditor` Implementations
|
||||
|
||||
When setting bean properties as string values, a Spring IoC container ultimately uses
|
||||
standard JavaBeans `PropertyEditor` implementations to convert these strings to the complex type of the
|
||||
@@ -566,7 +521,7 @@ Finally, the following example shows how to use `CustomEditorConfigurer` to regi
|
||||
----
|
||||
|
||||
[[beans-beans-conversion-customeditor-registration-per]]
|
||||
=== `PropertyEditorRegistrar`
|
||||
==== Using `PropertyEditorRegistrar`
|
||||
|
||||
Another mechanism for registering property editors with the Spring container is to
|
||||
create and use a `PropertyEditorRegistrar`. This interface is particularly useful when
|
||||
|
||||
@@ -2,7 +2,7 @@
|
||||
= Java Bean Validation
|
||||
|
||||
The Spring Framework provides support for the
|
||||
{bean-validation-site}[Java Bean Validation] API.
|
||||
https://beanvalidation.org/[Java Bean Validation] API.
|
||||
|
||||
|
||||
|
||||
@@ -72,7 +72,7 @@ Kotlin::
|
||||
======
|
||||
|
||||
A Bean Validation validator then validates instances of this class based on the declared
|
||||
constraints. See {bean-validation-site}[Bean Validation] for general information about
|
||||
constraints. See https://beanvalidation.org/[Bean Validation] for general information about
|
||||
the API. See the https://hibernate.org/validator/[Hibernate Validator] documentation for
|
||||
specific constraints. To learn how to set up a bean validation provider as a Spring
|
||||
bean, keep reading.
|
||||
@@ -123,12 +123,15 @@ Validator, is expected to be present in the classpath and is automatically detec
|
||||
|
||||
|
||||
[[validation-beanvalidation-spring-inject]]
|
||||
=== Inject Jakarta Validator
|
||||
=== Injecting a Validator
|
||||
|
||||
`LocalValidatorFactoryBean` implements both `jakarta.validation.ValidatorFactory` and
|
||||
`jakarta.validation.Validator`, so you can inject a reference to the latter to
|
||||
apply validation logic if you prefer to work with the Bean Validation API directly,
|
||||
as the following example shows:
|
||||
`jakarta.validation.Validator`, as well as Spring's `org.springframework.validation.Validator`.
|
||||
You can inject a reference to either of these interfaces into beans that need to invoke
|
||||
validation logic.
|
||||
|
||||
You can inject a reference to `jakarta.validation.Validator` if you prefer to work with the Bean
|
||||
Validation API directly, as the following example shows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -157,15 +160,8 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
|
||||
[[validation-beanvalidation-spring-inject-adapter]]
|
||||
=== Inject Spring Validator
|
||||
|
||||
In addition to implementing `jakarta.validation.Validator`, `LocalValidatorFactoryBean`
|
||||
also adapts to `org.springframework.validation.Validator`, so you can inject a reference
|
||||
to the latter if your bean requires the Spring Validation API.
|
||||
|
||||
For example:
|
||||
You can inject a reference to `org.springframework.validation.Validator` if your bean
|
||||
requires the Spring Validation API, as the following example shows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -194,15 +190,9 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
When used as `org.springframework.validation.Validator`, `LocalValidatorFactoryBean`
|
||||
invokes the underlying `jakarta.validation.Validator`, and then adapts
|
||||
``ContraintViolation``s to ``FieldError``s, and registers them with the `Errors` object
|
||||
passed into the `validate` method.
|
||||
|
||||
|
||||
|
||||
[[validation-beanvalidation-spring-constraints]]
|
||||
=== Configure Custom Constraints
|
||||
=== Configuring Custom Constraints
|
||||
|
||||
Each bean validation constraint consists of two parts:
|
||||
|
||||
@@ -282,10 +272,11 @@ As the preceding example shows, a `ConstraintValidator` implementation can have
|
||||
|
||||
|
||||
[[validation-beanvalidation-spring-method]]
|
||||
== Spring-driven Method Validation
|
||||
=== Spring-driven Method Validation
|
||||
|
||||
You can integrate the method validation feature of Bean Validation into a
|
||||
Spring context through a `MethodValidationPostProcessor` bean definition:
|
||||
You can integrate the method validation feature supported by Bean Validation 1.1 (and, as
|
||||
a custom extension, also by Hibernate Validator 4.3) into a Spring context through a
|
||||
`MethodValidationPostProcessor` bean definition:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
@@ -299,7 +290,7 @@ Java::
|
||||
public class AppConfig {
|
||||
|
||||
@Bean
|
||||
public static MethodValidationPostProcessor validationPostProcessor() {
|
||||
public MethodValidationPostProcessor validationPostProcessor() {
|
||||
return new MethodValidationPostProcessor();
|
||||
}
|
||||
}
|
||||
@@ -314,11 +305,11 @@ XML::
|
||||
----
|
||||
======
|
||||
|
||||
To be eligible for Spring-driven method validation, target classes need to be annotated
|
||||
To be eligible for Spring-driven method validation, all target classes need to be annotated
|
||||
with Spring's `@Validated` annotation, which can optionally also declare the validation
|
||||
groups to use. See
|
||||
{spring-framework-api}/validation/beanvalidation/MethodValidationPostProcessor.html[`MethodValidationPostProcessor`]
|
||||
for setup details with the Hibernate Validator and Bean Validation providers.
|
||||
{api-spring-framework}/validation/beanvalidation/MethodValidationPostProcessor.html[`MethodValidationPostProcessor`]
|
||||
for setup details with the Hibernate Validator and Bean Validation 1.1 providers.
|
||||
|
||||
[TIP]
|
||||
====
|
||||
@@ -329,142 +320,8 @@ xref:core/aop/proxying.adoc#aop-understanding-aop-proxies[Understanding AOP Prox
|
||||
to always use methods and accessors on proxied classes; direct field access will not work.
|
||||
====
|
||||
|
||||
Spring MVC and WebFlux have built-in support for the same underlying method validation but without
|
||||
the need for AOP. Therefore, do check the rest of this section, and also see the Spring MVC
|
||||
xref:web/webmvc/mvc-controller/ann-validation.adoc[Validation] and
|
||||
xref:web/webmvc/mvc-ann-rest-exceptions.adoc[Error Responses] sections, and the WebFlux
|
||||
xref:web/webflux/controller/ann-validation.adoc[Validation] and
|
||||
xref:web/webflux/ann-rest-exceptions.adoc[Error Responses] sections.
|
||||
|
||||
|
||||
[[validation-beanvalidation-spring-method-exceptions]]
|
||||
=== Method Validation Exceptions
|
||||
|
||||
By default, `jakarta.validation.ConstraintViolationException` is raised with the set of
|
||||
``ConstraintViolation``s returned by `jakarta.validation.Validator`. As an alternative,
|
||||
you can have `MethodValidationException` raised instead with ``ConstraintViolation``s
|
||||
adapted to `MessageSourceResolvable` errors. To enable set the following flag:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;
|
||||
|
||||
@Configuration
|
||||
public class AppConfig {
|
||||
|
||||
@Bean
|
||||
public static MethodValidationPostProcessor validationPostProcessor() {
|
||||
MethodValidationPostProcessor processor = new MethodValidationPostProcessor();
|
||||
processor.setAdaptConstraintViolations(true);
|
||||
return processor;
|
||||
}
|
||||
}
|
||||
|
||||
----
|
||||
|
||||
XML::
|
||||
+
|
||||
[source,xml,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
<bean class="org.springframework.validation.beanvalidation.MethodValidationPostProcessor">
|
||||
<property name="adaptConstraintViolations" value="true"/>
|
||||
</bean>
|
||||
----
|
||||
======
|
||||
|
||||
`MethodValidationException` contains a list of ``ParameterValidationResult``s which
|
||||
group errors by method parameter, and each exposes a `MethodParameter`, the argument
|
||||
value, and a list of `MessageSourceResolvable` errors adapted from
|
||||
``ConstraintViolation``s. For `@Valid` method parameters with cascaded violations on
|
||||
fields and properties, the `ParameterValidationResult` is `ParameterErrors` which
|
||||
implements `org.springframework.validation.Errors` and exposes validation errors as
|
||||
``FieldError``s.
|
||||
|
||||
|
||||
[[validation-beanvalidation-spring-method-i18n]]
|
||||
=== Customizing Validation Errors
|
||||
|
||||
The adapted `MessageSourceResolvable` errors can be turned into error messages to
|
||||
display to users through the configured `MessageSource` with locale and language specific
|
||||
resource bundles. This section provides an example for illustration.
|
||||
|
||||
Given the following class declarations:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
record Person(@Size(min = 1, max = 10) String name) {
|
||||
}
|
||||
|
||||
@Validated
|
||||
public class MyService {
|
||||
|
||||
void addStudent(@Valid Person person, @Max(2) int degrees) {
|
||||
// ...
|
||||
}
|
||||
}
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
@JvmRecord
|
||||
internal data class Person(@Size(min = 1, max = 10) val name: String)
|
||||
|
||||
@Validated
|
||||
class MyService {
|
||||
|
||||
fun addStudent(person: @Valid Person?, degrees: @Max(2) Int) {
|
||||
// ...
|
||||
}
|
||||
}
|
||||
----
|
||||
======
|
||||
|
||||
A `ConstraintViolation` on `Person.name()` is adapted to a `FieldError` with the following:
|
||||
|
||||
- Error codes `"Size.person.name"`, `"Size.name"`, `"Size.java.lang.String"`, and `"Size"`
|
||||
- Message arguments `"name"`, `10`, and `1` (the field name and the constraint attributes)
|
||||
- Default message "size must be between 1 and 10"
|
||||
|
||||
To customize the default message, you can add properties to
|
||||
xref:core/beans/context-introduction.adoc#context-functionality-messagesource[MessageSource]
|
||||
resource bundles using any of the above errors codes and message arguments. Note also that the
|
||||
message argument `"name"` is itself a `MessagreSourceResolvable` with error codes
|
||||
`"person.name"` and `"name"` and can customized too. For example:
|
||||
|
||||
Properties::
|
||||
+
|
||||
[source,properties,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
Size.person.name=Please, provide a {0} that is between {2} and {1} characters long
|
||||
person.name=username
|
||||
----
|
||||
|
||||
A `ConstraintViolation` on the `degrees` method parameter is adapted to a
|
||||
`MessageSourceResolvable` with the following:
|
||||
|
||||
- Error codes `"Max.myService#addStudent.degrees"`, `"Max.degrees"`, `"Max.int"`, `"Max"`
|
||||
- Message arguments "degrees2 and 2 (the field name and the constraint attribute)
|
||||
- Default message "must be less than or equal to 2"
|
||||
|
||||
To customize the above default message, you can add a property such as:
|
||||
|
||||
Properties::
|
||||
+
|
||||
[source,properties,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
Max.degrees=You cannot provide more than {1} {0}
|
||||
----
|
||||
|
||||
|
||||
[[validation-beanvalidation-spring-other]]
|
||||
=== Additional Configuration Options
|
||||
@@ -472,7 +329,7 @@ Max.degrees=You cannot provide more than {1} {0}
|
||||
The default `LocalValidatorFactoryBean` configuration suffices for most
|
||||
cases. There are a number of configuration options for various Bean Validation
|
||||
constructs, from message interpolation to traversal resolution. See the
|
||||
{spring-framework-api}/validation/beanvalidation/LocalValidatorFactoryBean.html[`LocalValidatorFactoryBean`]
|
||||
{api-spring-framework}/validation/beanvalidation/LocalValidatorFactoryBean.html[`LocalValidatorFactoryBean`]
|
||||
javadoc for more information on these options.
|
||||
|
||||
|
||||
|
||||
@@ -19,8 +19,8 @@ of the field). This is done as a convenience to aid developers when targeting er
|
||||
|
||||
More information on the `MessageCodesResolver` and the default strategy can be found
|
||||
in the javadoc of
|
||||
{spring-framework-api}/validation/MessageCodesResolver.html[`MessageCodesResolver`] and
|
||||
{spring-framework-api}/validation/DefaultMessageCodesResolver.html[`DefaultMessageCodesResolver`],
|
||||
{api-spring-framework}/validation/MessageCodesResolver.html[`MessageCodesResolver`] and
|
||||
{api-spring-framework}/validation/DefaultMessageCodesResolver.html[`DefaultMessageCodesResolver`],
|
||||
respectively.
|
||||
|
||||
|
||||
|
||||
@@ -139,7 +139,7 @@ Kotlin::
|
||||
======
|
||||
|
||||
The Spring team welcomes community-driven `Formatter` contributions. See
|
||||
{spring-framework-issues}[GitHub Issues] to contribute.
|
||||
https://github.com/spring-projects/spring-framework/issues[GitHub Issues] to contribute.
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -96,7 +96,7 @@ Kotlin::
|
||||
|
||||
The `static` `rejectIfEmpty(..)` method on the `ValidationUtils` class is used to
|
||||
reject the `name` property if it is `null` or the empty string. Have a look at the
|
||||
{spring-framework-api}/validation/ValidationUtils.html[`ValidationUtils`] javadoc
|
||||
{api-spring-framework}/validation/ValidationUtils.html[`ValidationUtils`] javadoc
|
||||
to see what functionality it provides besides the example shown previously.
|
||||
|
||||
While it is certainly possible to implement a single `Validator` class to validate each
|
||||
@@ -193,14 +193,8 @@ Kotlin::
|
||||
Validation errors are reported to the `Errors` object passed to the validator. In the case
|
||||
of Spring Web MVC, you can use the `<spring:bind/>` tag to inspect the error messages, but
|
||||
you can also inspect the `Errors` object yourself. More information about the
|
||||
methods it offers can be found in the {spring-framework-api}/validation/Errors.html[javadoc].
|
||||
|
||||
Validators may also get locally invoked for the immediate validation of a given object,
|
||||
not involving a binding process. As of 6.1, this has been simplified through a new
|
||||
`Validator.validateObject(Object)` method which is available by default now, returning
|
||||
a simple ´Errors` representation which can be inspected: typically calling `hasErrors()`
|
||||
or the new `failOnError` method for turning the error summary message into an exception
|
||||
(e.g. `validator.validateObject(myObject).failOnError(IllegalArgumentException::new)`).
|
||||
methods it offers can be found in the {api-spring-framework}/validation/Errors.html[javadoc].
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -219,14 +219,6 @@ version and consider setting the `spring.jdbc.getParameterType.ignore` property
|
||||
xref:appendix.adoc#appendix-spring-properties[`SpringProperties`] mechanism)
|
||||
if you encounter a specific performance issue for your application.
|
||||
|
||||
As of 6.1.2, Spring bypasses the default `getParameterType` resolution on PostgreSQL and
|
||||
MS SQL Server. This is a common optimization to avoid further roundtrips to the DBMS just
|
||||
for parameter type resolution which is known to make a very significant difference on
|
||||
PostgreSQL and MS SQL Server specifically, in particular for batch operations. If you
|
||||
happen to see a side effect e.g. when setting a byte array to null without specific type
|
||||
indication, you may explicitly set the `spring.jdbc.getParameterType.ignore=false` flag
|
||||
as a system property (see above) to restore full `getParameterType` resolution.
|
||||
|
||||
Alternatively, you could consider specifying the corresponding JDBC types explicitly,
|
||||
either through a `BatchPreparedStatementSetter` (as shown earlier), through an explicit
|
||||
type array given to a `List<Object[]>` based call, through `registerSqlType` calls on a
|
||||
|
||||
@@ -2,26 +2,30 @@
|
||||
= Choosing an Approach for JDBC Database Access
|
||||
|
||||
You can choose among several approaches to form the basis for your JDBC database access.
|
||||
In addition to three flavors of `JdbcTemplate`, a `SimpleJdbcInsert` and `SimpleJdbcCall`
|
||||
approach optimizes database metadata, and the RDBMS Object style results in a more
|
||||
object-oriented approach. Once you start using one of these approaches, you can still mix
|
||||
and match to include a feature from a different approach.
|
||||
In addition to three flavors of `JdbcTemplate`, a new `SimpleJdbcInsert` and
|
||||
`SimpleJdbcCall` approach optimizes database metadata, and the RDBMS Object style takes a
|
||||
more object-oriented approach similar to that of JDO Query design. Once you start using
|
||||
one of these approaches, you can still mix and match to include a feature from a
|
||||
different approach. All approaches require a JDBC 2.0-compliant driver, and some
|
||||
advanced features require a JDBC 3.0 driver.
|
||||
|
||||
* `JdbcTemplate` is the classic and most popular Spring JDBC approach. This
|
||||
"`lowest-level`" approach and all others use a `JdbcTemplate` under the covers.
|
||||
"`lowest-level`" approach and all others use a JdbcTemplate under the covers.
|
||||
* `NamedParameterJdbcTemplate` wraps a `JdbcTemplate` to provide named parameters
|
||||
instead of the traditional JDBC `?` placeholders. This approach provides better
|
||||
documentation and ease of use when you have multiple parameters for an SQL statement.
|
||||
* `SimpleJdbcInsert` and `SimpleJdbcCall` optimize database metadata to limit the amount
|
||||
of necessary configuration. This approach simplifies coding so that you only need to
|
||||
provide the name of the table or procedure and a map of parameters matching the column
|
||||
names. This works only if the database provides adequate metadata. If the database does
|
||||
not provide this metadata, you have to provide explicit configuration of the parameters.
|
||||
of necessary configuration. This approach simplifies coding so that you need to
|
||||
provide only the name of the table or procedure and provide a map of parameters matching
|
||||
the column names. This works only if the database provides adequate metadata. If the
|
||||
database does not provide this metadata, you have to provide explicit
|
||||
configuration of the parameters.
|
||||
* RDBMS objects — including `MappingSqlQuery`, `SqlUpdate`, and `StoredProcedure` —
|
||||
require you to create reusable and thread-safe objects during initialization of your
|
||||
data-access layer. This approach allows you to define your query string, declare
|
||||
parameters, and compile the query. Once you do that, `execute(...)`, `update(...)`, and
|
||||
`findObject(...)` methods can be called multiple times with various parameter values.
|
||||
data-access layer. This approach is modeled after JDO Query, wherein you define your
|
||||
query string, declare parameters, and compile the query. Once you do that,
|
||||
`execute(...)`, `update(...)`, and `findObject(...)` methods can be called multiple
|
||||
times with various parameter values.
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -199,7 +199,7 @@ participating in Spring managed transactions. It is generally preferable to writ
|
||||
own new code by using the higher level abstractions for resource management, such as
|
||||
`JdbcTemplate` or `DataSourceUtils`.
|
||||
|
||||
See the {spring-framework-api}/jdbc/datasource/TransactionAwareDataSourceProxy.html[`TransactionAwareDataSourceProxy`]
|
||||
See the {api-spring-framework}/jdbc/datasource/TransactionAwareDataSourceProxy.html[`TransactionAwareDataSourceProxy`]
|
||||
javadoc for more details.
|
||||
|
||||
|
||||
@@ -230,19 +230,6 @@ provided you stick to the required connection lookup pattern. Note that JTA does
|
||||
savepoints or custom isolation levels and has a different timeout mechanism but otherwise
|
||||
exposes similar behavior in terms of JDBC resources and JDBC commit/rollback management.
|
||||
|
||||
For JTA-style lazy retrieval of actual resource connections, Spring provides a
|
||||
corresponding `DataSource` proxy class for the target connection pool: see
|
||||
{spring-framework-api}/jdbc/datasource/LazyConnectionDataSourceProxy.html[`LazyConnectionDataSourceProxy`].
|
||||
This is particularly useful for potentially empty transactions without actual statement
|
||||
execution (never fetching an actual resource in such a scenario), and also in front of
|
||||
a routing `DataSource` which means to take the transaction-synchronized read-only flag
|
||||
and/or isolation level into account (e.g. `IsolationLevelDataSourceRouter`).
|
||||
|
||||
`LazyConnectionDataSourceProxy` also provides special support for a read-only connection
|
||||
pool to use during a read-only transaction, avoiding the overhead of switching the JDBC
|
||||
Connection's read-only flag at the beginning and end of every transaction when fetching
|
||||
it from the primary connection pool (which may be costly depending on the JDBC driver).
|
||||
|
||||
NOTE: As of 5.3, Spring provides an extended `JdbcTransactionManager` variant which adds
|
||||
exception translation capabilities on commit/rollback (aligned with `JdbcTemplate`).
|
||||
Where `DataSourceTransactionManager` will only ever throw `TransactionSystemException`
|
||||
|
||||
@@ -6,7 +6,6 @@ including error handling. It includes the following topics:
|
||||
|
||||
* xref:data-access/jdbc/core.adoc#jdbc-JdbcTemplate[Using `JdbcTemplate`]
|
||||
* xref:data-access/jdbc/core.adoc#jdbc-NamedParameterJdbcTemplate[Using `NamedParameterJdbcTemplate`]
|
||||
* xref:data-access/jdbc/core.adoc#jdbc-JdbcClient[Unified JDBC Query/Update Operations: `JdbcClient`]
|
||||
* xref:data-access/jdbc/core.adoc#jdbc-SQLExceptionTranslator[Using `SQLExceptionTranslator`]
|
||||
* xref:data-access/jdbc/core.adoc#jdbc-statements-executing[Running Statements]
|
||||
* xref:data-access/jdbc/core.adoc#jdbc-statements-querying[Running Queries]
|
||||
@@ -51,7 +50,7 @@ corresponding to the fully qualified class name of the template instance (typica
|
||||
|
||||
The following sections provide some examples of `JdbcTemplate` usage. These examples
|
||||
are not an exhaustive list of all of the functionality exposed by the `JdbcTemplate`.
|
||||
See the attendant {spring-framework-api}/jdbc/core/JdbcTemplate.html[javadoc] for that.
|
||||
See the attendant {api-spring-framework}/jdbc/core/JdbcTemplate.html[javadoc] for that.
|
||||
|
||||
[[jdbc-JdbcTemplate-examples-query]]
|
||||
=== Querying (`SELECT`)
|
||||
@@ -702,120 +701,6 @@ See also xref:data-access/jdbc/core.adoc#jdbc-JdbcTemplate-idioms[`JdbcTemplate`
|
||||
for guidelines on using the `NamedParameterJdbcTemplate` class in the context of an application.
|
||||
|
||||
|
||||
[[jdbc-JdbcClient]]
|
||||
== Unified JDBC Query/Update Operations: `JdbcClient`
|
||||
|
||||
As of 6.1, the named parameter statements of `NamedParameterJdbcTemplate` and the positional
|
||||
parameter statements of a regular `JdbcTemplate` are available through a unified client API
|
||||
with a fluent interaction model.
|
||||
|
||||
For example, with positional parameters:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
private JdbcClient jdbcClient = JdbcClient.create(dataSource);
|
||||
|
||||
public int countOfActorsByFirstName(String firstName) {
|
||||
return this.jdbcClient.sql("select count(*) from t_actor where first_name = ?")
|
||||
.param(firstName)
|
||||
.query(Integer.class).single();
|
||||
}
|
||||
----
|
||||
|
||||
For example, with named parameters:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
private JdbcClient jdbcClient = JdbcClient.create(dataSource);
|
||||
|
||||
public int countOfActorsByFirstName(String firstName) {
|
||||
return this.jdbcClient.sql("select count(*) from t_actor where first_name = :firstName")
|
||||
.param("firstName", firstName)
|
||||
.query(Integer.class).single();
|
||||
}
|
||||
----
|
||||
|
||||
`RowMapper` capabilities are available as well, with flexible result resolution:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
List<Actor> actors = this.jdbcClient.sql("select first_name, last_name from t_actor")
|
||||
.query((rs, rowNum) -> new Actor(rs.getString("first_name"), rs.getString("last_name")))
|
||||
.list();
|
||||
----
|
||||
|
||||
Instead of a custom `RowMapper`, you may also specify a class to map to.
|
||||
For example, assuming that `Actor` has `firstName` and `lastName` properties
|
||||
as a record class, a custom constructor, bean properties, or plain fields:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
List<Actor> actors = this.jdbcClient.sql("select first_name, last_name from t_actor")
|
||||
.query(Actor.class)
|
||||
.list();
|
||||
----
|
||||
|
||||
With a required single object result:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
Actor actor = this.jdbcClient.sql("select first_name, last_name from t_actor where id = ?")
|
||||
.param(1212L)
|
||||
.query(Actor.class)
|
||||
.single();
|
||||
----
|
||||
|
||||
With a `java.util.Optional` result:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
Optional<Actor> actor = this.jdbcClient.sql("select first_name, last_name from t_actor where id = ?")
|
||||
.param(1212L)
|
||||
.query(Actor.class)
|
||||
.optional();
|
||||
----
|
||||
|
||||
And for an update statement:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
this.jdbcClient.sql("insert into t_actor (first_name, last_name) values (?, ?)")
|
||||
.param("Leonor").param("Watling")
|
||||
.update();
|
||||
----
|
||||
|
||||
Or an update statement with named parameters:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
this.jdbcClient.sql("insert into t_actor (first_name, last_name) values (:firstName, :lastName)")
|
||||
.param("firstName", "Leonor").param("lastName", "Watling")
|
||||
.update();
|
||||
----
|
||||
|
||||
Instead of individual named parameters, you may also specify a parameter source object –
|
||||
for example, a record class, a class with bean properties, or a plain field holder which
|
||||
provides `firstName` and `lastName` properties, such as the `Actor` class from above:
|
||||
|
||||
[source,java,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
this.jdbcClient.sql("insert into t_actor (first_name, last_name) values (:firstName, :lastName)")
|
||||
.paramSource(new Actor("Leonor", "Watling")
|
||||
.update();
|
||||
----
|
||||
|
||||
The automatic `Actor` class mapping for parameters as well as the query results above is
|
||||
provided through implicit `SimplePropertySqlParameterSource` and `SimplePropertyRowMapper`
|
||||
strategies which are also available for direct use. They can serve as a common replacement
|
||||
for `BeanPropertySqlParameterSource` and `BeanPropertyRowMapper`/`DataClassRowMapper`,
|
||||
also with `JdbcTemplate` and `NamedParameterJdbcTemplate` themselves.
|
||||
|
||||
NOTE: `JdbcClient` is a flexible but simplified facade for JDBC query/update statements.
|
||||
Advanced capabilities such as batch inserts and stored procedure calls typically require
|
||||
extra customization: consider Spring's `SimpleJdbcInsert` and `SimpleJdbcCall` classes or
|
||||
plain direct `JdbcTemplate` usage for any such capabilities not available in `JdbcClient`.
|
||||
|
||||
|
||||
[[jdbc-SQLExceptionTranslator]]
|
||||
== Using `SQLExceptionTranslator`
|
||||
|
||||
@@ -824,7 +709,7 @@ between ``SQLException``s and Spring's own `org.springframework.dao.DataAccessEx
|
||||
which is agnostic in regard to data access strategy. Implementations can be generic (for
|
||||
example, using SQLState codes for JDBC) or proprietary (for example, using Oracle error
|
||||
codes) for greater precision. This exception translation mechanism is used behind the
|
||||
common `JdbcTemplate` and `JdbcTransactionManager` entry points which do not
|
||||
the common `JdbcTemplate` and `JdbcTransactionManager` entry points which do not
|
||||
propagate `SQLException` but rather `DataAccessException`.
|
||||
|
||||
NOTE: As of 6.0, the default exception translator is `SQLExceptionSubclassTranslator`,
|
||||
|
||||
@@ -83,7 +83,7 @@ Kotlin::
|
||||
----
|
||||
======
|
||||
|
||||
See the {spring-framework-api}/jdbc/datasource/embedded/EmbeddedDatabaseBuilder.html[javadoc for `EmbeddedDatabaseBuilder`]
|
||||
See the {api-spring-framework}/jdbc/datasource/embedded/EmbeddedDatabaseBuilder.html[javadoc for `EmbeddedDatabaseBuilder`]
|
||||
for further details on all supported options.
|
||||
|
||||
You can also use the `EmbeddedDatabaseBuilder` to create an embedded database by using Java
|
||||
@@ -288,7 +288,7 @@ You can extend Spring JDBC embedded database support in two ways:
|
||||
connection pool to manage embedded database connections.
|
||||
|
||||
We encourage you to contribute extensions to the Spring community at
|
||||
{spring-framework-issues}[GitHub Issues].
|
||||
https://github.com/spring-projects/spring-framework/issues[GitHub Issues].
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -112,7 +112,7 @@ Java::
|
||||
this.actorMappingQuery = new ActorMappingQuery(dataSource);
|
||||
}
|
||||
|
||||
public Actor getActor(Long id) {
|
||||
public Customer getCustomer(Long id) {
|
||||
return actorMappingQuery.findObject(id);
|
||||
}
|
||||
----
|
||||
@@ -123,11 +123,11 @@ Kotlin::
|
||||
----
|
||||
private val actorMappingQuery = ActorMappingQuery(dataSource)
|
||||
|
||||
fun getActor(id: Long) = actorMappingQuery.findObject(id)
|
||||
fun getCustomer(id: Long) = actorMappingQuery.findObject(id)
|
||||
----
|
||||
======
|
||||
|
||||
The method in the preceding example retrieves the actor with the `id` that is passed in as the
|
||||
The method in the preceding example retrieves the customer with the `id` that is passed in as the
|
||||
only parameter. Since we want only one object to be returned, we call the `findObject` convenience
|
||||
method with the `id` as the parameter. If we had instead a query that returned a
|
||||
list of objects and took additional parameters, we would use one of the `execute`
|
||||
|
||||
@@ -20,10 +20,9 @@ xref:data-access/jdbc/connections.adoc[Controlling Database Connections] and xre
|
||||
|
||||
* `object`: The `org.springframework.jdbc.object` package contains classes that represent
|
||||
RDBMS queries, updates, and stored procedures as thread-safe, reusable objects. See
|
||||
xref:data-access/jdbc/object.adoc[Modeling JDBC Operations as Java Objects]. This style
|
||||
results in a more object-oriented approach, although objects returned by queries are
|
||||
naturally disconnected from the database. This higher-level of JDBC abstraction depends
|
||||
on the lower-level abstraction in the `org.springframework.jdbc.core` package.
|
||||
xref:data-access/jdbc/object.adoc[Modeling JDBC Operations as Java Objects]. This approach is modeled by JDO, although objects returned by queries
|
||||
are naturally disconnected from the database. This higher-level of JDBC abstraction
|
||||
depends on the lower-level abstraction in the `org.springframework.jdbc.core` package.
|
||||
|
||||
* `support`: The `org.springframework.jdbc.support` package provides `SQLException`
|
||||
translation functionality and some utility classes. Exceptions thrown during JDBC processing
|
||||
|
||||
@@ -209,26 +209,141 @@ are passed in as a parameter to the stored procedure.
|
||||
|
||||
The `SqlReturnType` interface has a single method (named `getTypeValue`) that must be
|
||||
implemented. This interface is used as part of the declaration of an `SqlOutParameter`.
|
||||
The following example shows returning the value of a `java.sql.Struct` object of the user
|
||||
The following example shows returning the value of an Oracle `STRUCT` object of the user
|
||||
declared type `ITEM_TYPE`:
|
||||
|
||||
include-code::./TestItemStoredProcedure[]
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
public class TestItemStoredProcedure extends StoredProcedure {
|
||||
|
||||
public TestItemStoredProcedure(DataSource dataSource) {
|
||||
// ...
|
||||
declareParameter(new SqlOutParameter("item", OracleTypes.STRUCT, "ITEM_TYPE",
|
||||
(CallableStatement cs, int colIndx, int sqlType, String typeName) -> {
|
||||
STRUCT struct = (STRUCT) cs.getObject(colIndx);
|
||||
Object[] attr = struct.getAttributes();
|
||||
TestItem item = new TestItem();
|
||||
item.setId(((Number) attr[0]).longValue());
|
||||
item.setDescription((String) attr[1]);
|
||||
item.setExpirationDate((java.util.Date) attr[2]);
|
||||
return item;
|
||||
}));
|
||||
// ...
|
||||
}
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
class TestItemStoredProcedure(dataSource: DataSource) : StoredProcedure() {
|
||||
|
||||
init {
|
||||
// ...
|
||||
declareParameter(SqlOutParameter("item", OracleTypes.STRUCT, "ITEM_TYPE") { cs, colIndx, sqlType, typeName ->
|
||||
val struct = cs.getObject(colIndx) as STRUCT
|
||||
val attr = struct.getAttributes()
|
||||
TestItem((attr[0] as Long, attr[1] as String, attr[2] as Date)
|
||||
})
|
||||
// ...
|
||||
}
|
||||
}
|
||||
----
|
||||
======
|
||||
|
||||
You can use `SqlTypeValue` to pass the value of a Java object (such as `TestItem`) to a
|
||||
stored procedure. The `SqlTypeValue` interface has a single method (named
|
||||
`createTypeValue`) that you must implement. The active connection is passed in, and you
|
||||
can use it to create database-specific objects, such as `java.sql.Struct` instances
|
||||
or `java.sql.Array` instances. The following example creates a `java.sql.Struct` instance:
|
||||
can use it to create database-specific objects, such as `StructDescriptor` instances
|
||||
or `ArrayDescriptor` instances. The following example creates a `StructDescriptor` instance:
|
||||
|
||||
include-code::./SqlTypeValueFactory[tag=struct,indent=0]
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
final TestItem testItem = new TestItem(123L, "A test item",
|
||||
new SimpleDateFormat("yyyy-M-d").parse("2010-12-31"));
|
||||
|
||||
SqlTypeValue value = new AbstractSqlTypeValue() {
|
||||
protected Object createTypeValue(Connection conn, int sqlType, String typeName) throws SQLException {
|
||||
StructDescriptor itemDescriptor = new StructDescriptor(typeName, conn);
|
||||
Struct item = new STRUCT(itemDescriptor, conn,
|
||||
new Object[] {
|
||||
testItem.getId(),
|
||||
testItem.getDescription(),
|
||||
new java.sql.Date(testItem.getExpirationDate().getTime())
|
||||
});
|
||||
return item;
|
||||
}
|
||||
};
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
val (id, description, expirationDate) = TestItem(123L, "A test item",
|
||||
SimpleDateFormat("yyyy-M-d").parse("2010-12-31"))
|
||||
|
||||
val value = object : AbstractSqlTypeValue() {
|
||||
override fun createTypeValue(conn: Connection, sqlType: Int, typeName: String?): Any {
|
||||
val itemDescriptor = StructDescriptor(typeName, conn)
|
||||
return STRUCT(itemDescriptor, conn,
|
||||
arrayOf(id, description, java.sql.Date(expirationDate.time)))
|
||||
}
|
||||
}
|
||||
----
|
||||
======
|
||||
|
||||
You can now add this `SqlTypeValue` to the `Map` that contains the input parameters for the
|
||||
`execute` call of the stored procedure.
|
||||
|
||||
Another use for the `SqlTypeValue` is passing in an array of values to an Oracle stored
|
||||
procedure. Oracle has an `createOracleArray` method on `OracleConnection` that you can
|
||||
access by unwrapping it. You can use the `SqlTypeValue` to create an array and populate
|
||||
it with values from the Java `java.sql.Array`, as the following example shows:
|
||||
procedure. Oracle has its own internal `ARRAY` class that must be used in this case, and
|
||||
you can use the `SqlTypeValue` to create an instance of the Oracle `ARRAY` and populate
|
||||
it with values from the Java `ARRAY`, as the following example shows:
|
||||
|
||||
[tabs]
|
||||
======
|
||||
Java::
|
||||
+
|
||||
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
|
||||
----
|
||||
final Long[] ids = new Long[] {1L, 2L};
|
||||
|
||||
SqlTypeValue value = new AbstractSqlTypeValue() {
|
||||
protected Object createTypeValue(Connection conn, int sqlType, String typeName) throws SQLException {
|
||||
ArrayDescriptor arrayDescriptor = new ArrayDescriptor(typeName, conn);
|
||||
ARRAY idArray = new ARRAY(arrayDescriptor, conn, ids);
|
||||
return idArray;
|
||||
}
|
||||
};
|
||||
----
|
||||
|
||||
Kotlin::
|
||||
+
|
||||
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
|
||||
----
|
||||
class TestItemStoredProcedure(dataSource: DataSource) : StoredProcedure() {
|
||||
|
||||
init {
|
||||
val ids = arrayOf(1L, 2L)
|
||||
val value = object : AbstractSqlTypeValue() {
|
||||
override fun createTypeValue(conn: Connection, sqlType: Int, typeName: String?): Any {
|
||||
val arrayDescriptor = ArrayDescriptor(typeName, conn)
|
||||
return ARRAY(arrayDescriptor, conn, ids)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
----
|
||||
======
|
||||
|
||||
|
||||
include-code::./SqlTypeValueFactory[tag=oracle-array,indent=0]
|
||||
|
||||
|
||||
@@ -323,12 +323,12 @@ use these alternative input classes.
|
||||
|
||||
The `SimpleJdbcCall` class uses metadata in the database to look up names of `in`
|
||||
and `out` parameters so that you do not have to explicitly declare them. You can
|
||||
declare parameters if you prefer to do that or if you have parameters that do not
|
||||
have an automatic mapping to a Java class. The first example shows a simple procedure
|
||||
that returns only scalar values in `VARCHAR` and `DATE` format from a MySQL database.
|
||||
The example procedure reads a specified actor entry and returns `first_name`,
|
||||
`last_name`, and `birth_date` columns in the form of `out` parameters. The following
|
||||
listing shows the first example:
|
||||
declare parameters if you prefer to do that or if you have parameters (such as `ARRAY`
|
||||
or `STRUCT`) that do not have an automatic mapping to a Java class. The first example
|
||||
shows a simple procedure that returns only scalar values in `VARCHAR` and `DATE` format
|
||||
from a MySQL database. The example procedure reads a specified actor entry and returns
|
||||
`first_name`, `last_name`, and `birth_date` columns in the form of `out` parameters.
|
||||
The following listing shows the first example:
|
||||
|
||||
[source,sql,indent=0,subs="verbatim,quotes"]
|
||||
----
|
||||
|
||||
@@ -407,12 +407,6 @@ exposes the Hibernate transaction as a JDBC transaction if you have set up the p
|
||||
`DataSource` for which the transactions are supposed to be exposed through the
|
||||
`dataSource` property of the `HibernateTransactionManager` class.
|
||||
|
||||
For JTA-style lazy retrieval of actual resource connections, Spring provides a
|
||||
corresponding `DataSource` proxy class for the target connection pool: see
|
||||
{spring-framework-api}/jdbc/datasource/LazyConnectionDataSourceProxy.html[`LazyConnectionDataSourceProxy`].
|
||||
This is particularly useful for Hibernate read-only transactions which can often
|
||||
be processed from a local cache rather than hitting the database.
|
||||
|
||||
|
||||
[[orm-hibernate-resources]]
|
||||
== Comparing Container-managed and Locally Defined Resources
|
||||
|
||||
@@ -58,8 +58,8 @@ The benefits of using the Spring Framework to create your ORM DAOs include:
|
||||
|
||||
TIP: For more comprehensive ORM support, including support for alternative database
|
||||
technologies such as MongoDB, you might want to check out the
|
||||
{spring-site-projects}/spring-data/[Spring Data] suite of projects. If you are
|
||||
a JPA user, the {spring-site-guides}/gs/accessing-data-jpa/[Getting Started Accessing
|
||||
https://projects.spring.io/spring-data/[Spring Data] suite of projects. If you are
|
||||
a JPA user, the https://spring.io/guides/gs/accessing-data-jpa/[Getting Started Accessing
|
||||
Data with JPA] guide from https://spring.io provides a great introduction.
|
||||
|
||||
|
||||
|
||||
@@ -157,7 +157,7 @@ The `LoadTimeWeaver` interface is a Spring-provided class that lets JPA
|
||||
`ClassTransformer` instances be plugged in a specific manner, depending on whether the
|
||||
environment is a web container or application server. Hooking `ClassTransformers`
|
||||
through an
|
||||
{java-api}/java.instrument/java/lang/instrument/package-summary.html[agent]
|
||||
https://docs.oracle.com/javase/6/docs/api/java/lang/instrument/package-summary.html[agent]
|
||||
is typically not efficient. The agents work against the entire virtual machine and
|
||||
inspect every class that is loaded, which is usually undesirable in a production
|
||||
server environment.
|
||||
@@ -506,20 +506,13 @@ if you have not already done so, to get more detailed coverage of Spring's decla
|
||||
The recommended strategy for JPA is local transactions through JPA's native transaction
|
||||
support. Spring's `JpaTransactionManager` provides many capabilities known from local
|
||||
JDBC transactions (such as transaction-specific isolation levels and resource-level
|
||||
read-only optimizations) against any regular JDBC connection pool, without requiring
|
||||
a JTA transaction coordinator and XA-capable resources.
|
||||
read-only optimizations) against any regular JDBC connection pool (no XA requirement).
|
||||
|
||||
Spring JPA also lets a configured `JpaTransactionManager` expose a JPA transaction
|
||||
to JDBC access code that accesses the same `DataSource`, provided that the registered
|
||||
`JpaDialect` supports retrieval of the underlying JDBC `Connection`. Spring provides
|
||||
dialects for the EclipseLink and Hibernate JPA implementations. See the
|
||||
xref:data-access/orm/jpa.adoc#orm-jpa-dialect[next section] for details on `JpaDialect`.
|
||||
|
||||
For JTA-style lazy retrieval of actual resource connections, Spring provides a
|
||||
corresponding `DataSource` proxy class for the target connection pool: see
|
||||
{spring-framework-api}/jdbc/datasource/LazyConnectionDataSourceProxy.html[`LazyConnectionDataSourceProxy`].
|
||||
This is particularly useful for JPA read-only transactions which can often
|
||||
be processed from a local cache rather than hitting the database.
|
||||
`JpaDialect` supports retrieval of the underlying JDBC `Connection`.
|
||||
Spring provides dialects for the EclipseLink and Hibernate JPA implementations.
|
||||
See the xref:data-access/orm/jpa.adoc#orm-jpa-dialect[next section] for details on the `JpaDialect` mechanism.
|
||||
|
||||
|
||||
[[orm-jpa-dialect]]
|
||||
@@ -548,8 +541,8 @@ way of auto-configuring an `EntityManagerFactory` setup for Hibernate or Eclipse
|
||||
respectively. Note that those provider adapters are primarily designed for use with
|
||||
Spring-driven transaction management (that is, for use with `JpaTransactionManager`).
|
||||
|
||||
See the {spring-framework-api}/orm/jpa/JpaDialect.html[`JpaDialect`] and
|
||||
{spring-framework-api}/orm/jpa/JpaVendorAdapter.html[`JpaVendorAdapter`] javadoc for
|
||||
See the {api-spring-framework}/orm/jpa/JpaDialect.html[`JpaDialect`] and
|
||||
{api-spring-framework}/orm/jpa/JpaVendorAdapter.html[`JpaVendorAdapter`] javadoc for
|
||||
more details of its operations and how they are used within Spring's JPA support.
|
||||
|
||||
|
||||
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user