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Author SHA1 Message Date
Stéphane Nicoll 9ac4b71647 Release v6.2.0-M7 2024-08-14 14:30:18 +02:00
2214 changed files with 19257 additions and 47376 deletions
+17
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@@ -0,0 +1,17 @@
<!--
!!! For Security Vulnerabilities, please go to https://spring.io/security-policy !!!
-->
**Affects:** \<Spring Framework version>
---
<!--
Thanks for taking the time to create an issue. Please read the following:
- Questions should be asked on Stack Overflow.
- For bugs, specify affected versions and explain what you are trying to do.
- For enhancements, provide context and describe the problem.
Issue or Pull Request? Create only one, not both. GitHub treats them as the same.
If unsure, start with an issue, and if you submit a pull request later, the
issue will be closed as superseded.
-->
-6
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@@ -1,6 +0,0 @@
blank_issues_enabled: false
contact_links:
- name: Community Support
url: https://stackoverflow.com/tags/spring
about: Please ask and answer questions on StackOverflow with the tag `spring`.
-23
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@@ -1,23 +0,0 @@
---
name: General
about: Bugs, enhancements, documentation, tasks.
title: ''
labels: ''
assignees: ''
---
<!--
Have you considered asking for help on stackoverflow.com?
** Bug Reports **
Please submit issues against OSS supported versions, see https://spring.io/projects/spring-framework#support
Please provide a minimal sample application that reproduces the problem for faster issue triage.
** Enhancements requests **
Before explaining how you would like things to work,
please describe a concrete use case for this feature and how you have tried to solve this so far.
-->
@@ -1,8 +1,8 @@
name: Await HTTP Resource
description: 'Waits for an HTTP resource to be available (a HEAD request succeeds)'
description: Waits for an HTTP resource to be available (a HEAD request succeeds)
inputs:
url:
description: 'URL of the resource to await'
description: 'The URL of the resource to await'
required: true
runs:
using: composite
+17 -22
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@@ -1,35 +1,31 @@
name: 'Build'
description: 'Builds the project, optionally publishing it to a local deployment repository'
inputs:
develocity-access-key:
description: 'Access key for authentication with ge.spring.io'
required: false
java-distribution:
description: 'Java distribution to use'
required: false
default: 'liberica'
java-early-access:
description: 'Whether the Java version is in early access'
required: false
default: 'false'
java-toolchain:
description: 'Whether a Java toolchain should be used'
required: false
default: 'false'
java-version:
description: 'Java version to compile and test with'
required: false
default: '17'
publish:
description: 'Whether to publish artifacts ready for deployment to Artifactory'
description: 'The Java version to compile and test with'
java-early-access:
required: false
default: 'false'
description: 'Whether the Java version is in early access'
java-toolchain:
required: false
default: 'false'
description: 'Whether a Java toolchain should be used'
publish:
required: false
default: 'false'
description: 'Whether to publish artifacts ready for deployment to Artifactory'
develocity-access-key:
required: false
description: 'The access key for authentication with ge.spring.io'
outputs:
build-scan-url:
description: 'URL, if any, of the build scan produced by the build'
description: 'The URL, if any, of the build scan produced by the build'
value: ${{ (inputs.publish == 'true' && steps.publish.outputs.build-scan-url) || steps.build.outputs.build-scan-url }}
version:
description: 'Version that was built'
description: 'The version that was built'
value: ${{ steps.read-version.outputs.version }}
runs:
using: composite
@@ -38,10 +34,9 @@ runs:
uses: ./.github/actions/prepare-gradle-build
with:
develocity-access-key: ${{ inputs.develocity-access-key }}
java-distribution: ${{ inputs.java-distribution }}
java-version: ${{ inputs.java-version }}
java-early-access: ${{ inputs.java-early-access }}
java-toolchain: ${{ inputs.java-toolchain }}
java-version: ${{ inputs.java-version }}
- name: Build
id: build
if: ${{ inputs.publish == 'false' }}
@@ -1,27 +1,27 @@
name: Create GitHub Release
description: 'Create the release on GitHub with a changelog'
description: Create the release on GitHub with a changelog
inputs:
milestone:
description: 'Name of the GitHub milestone for which a release will be created'
description: Name of the GitHub milestone for which a release will be created
required: true
token:
description: Token to use for authentication with GitHub
required: true
pre-release:
description: 'Whether the release is a pre-release (a milestone or release candidate)'
description: Whether the release is a pre-release (a milestone or release candidate)
required: false
default: 'false'
token:
description: 'Token to use for authentication with GitHub'
required: true
runs:
using: composite
steps:
- name: Generate Changelog
uses: spring-io/github-changelog-generator@86958813a62af8fb223b3fd3b5152035504bcb83 #v0.0.12
uses: spring-io/github-changelog-generator@185319ad7eaa75b0e8e72e4b6db19c8b2cb8c4c1 #v0.0.11
with:
config-file: .github/actions/create-github-release/changelog-generator.yml
milestone: ${{ inputs.milestone }}
token: ${{ inputs.token }}
config-file: .github/actions/create-github-release/changelog-generator.yml
- name: Create GitHub Release
shell: bash
env:
GITHUB_TOKEN: ${{ inputs.token }}
shell: bash
run: gh release create ${{ format('v{0}', inputs.milestone) }} --notes-file changelog.md ${{ inputs.pre-release == 'true' && '--prerelease' || '' }}
+15 -20
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@@ -1,41 +1,36 @@
name: Prepare Gradle Build
name: 'Prepare Gradle Build'
description: 'Prepares a Gradle build. Sets up Java and Gradle and configures Gradle properties'
inputs:
develocity-access-key:
description: 'Access key for authentication with ge.spring.io'
required: false
java-distribution:
description: 'Java distribution to use'
required: false
default: 'liberica'
java-early-access:
description: 'Whether the Java version is in early access. When true, forces java-distribution to temurin'
required: false
default: 'false'
java-toolchain:
description: 'Whether a Java toolchain should be used'
required: false
default: 'false'
java-version:
description: 'Java version to use for the build'
required: false
default: '17'
description: 'The Java version to use for the build'
java-early-access:
required: false
default: 'false'
description: 'Whether the Java version is in early access'
java-toolchain:
required: false
default: 'false'
description: 'Whether a Java toolchain should be used'
develocity-access-key:
required: false
description: 'The access key for authentication with ge.spring.io'
runs:
using: composite
steps:
- name: Set Up Java
uses: actions/setup-java@v4
with:
distribution: ${{ inputs.java-early-access == 'true' && 'temurin' || (inputs.java-distribution || 'liberica') }}
distribution: ${{ inputs.java-early-access == 'true' && 'temurin' || 'liberica' }}
java-version: |
${{ inputs.java-early-access == 'true' && format('{0}-ea', inputs.java-version) || inputs.java-version }}
${{ inputs.java-toolchain == 'true' && '17' || '' }}
- name: Set Up Gradle
uses: gradle/actions/setup-gradle@0bdd871935719febd78681f197cd39af5b6e16a6 # v4.2.2
uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3.5.0
with:
cache-read-only: false
develocity-access-key: ${{ inputs.develocity-access-key }}
develocity-token-expiry: 4
- name: Configure Gradle Properties
shell: bash
run: |
@@ -1,5 +1,5 @@
name: Print JVM thread dumps
description: 'Prints a thread dump for all running JVMs'
description: Prints a thread dump for all running JVMs
runs:
using: composite
steps:
+13 -19
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@@ -1,39 +1,33 @@
name: Send Notification
description: 'Sends a Google Chat message as a notification of the job''s outcome'
description: Sends a Google Chat message as a notification of the job's outcome
inputs:
build-scan-url:
description: 'URL of the build scan to include in the notification'
required: false
run-name:
description: 'Name of the run to include in the notification'
required: false
default: ${{ format('{0} {1}', github.ref_name, github.job) }}
status:
description: 'Status of the job'
required: true
webhook-url:
description: 'Google Chat Webhook URL'
required: true
status:
description: 'Status of the job'
required: true
build-scan-url:
description: 'URL of the build scan to include in the notification'
run-name:
description: 'Name of the run to include in the notification'
default: ${{ format('{0} {1}', github.ref_name, github.job) }}
runs:
using: composite
steps:
- name: Prepare Variables
shell: bash
- shell: bash
run: |
echo "BUILD_SCAN=${{ inputs.build-scan-url == '' && ' [build scan unavailable]' || format(' [<{0}|Build Scan>]', inputs.build-scan-url) }}" >> "$GITHUB_ENV"
echo "RUN_URL=${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}" >> "$GITHUB_ENV"
- name: Success Notification
- shell: bash
if: ${{ inputs.status == 'success' }}
shell: bash
run: |
curl -X POST '${{ inputs.webhook-url }}' -H 'Content-Type: application/json' -d '{ text: "<${{ env.RUN_URL }}|${{ inputs.run-name }}> was successful ${{ env.BUILD_SCAN }}"}' || true
- name: Failure Notification
- shell: bash
if: ${{ inputs.status == 'failure' }}
shell: bash
run: |
curl -X POST '${{ inputs.webhook-url }}' -H 'Content-Type: application/json' -d '{ text: "<users/all> *<${{ env.RUN_URL }}|${{ inputs.run-name }}> failed* ${{ env.BUILD_SCAN }}"}' || true
- name: Cancel Notification
- shell: bash
if: ${{ inputs.status == 'cancelled' }}
shell: bash
run: |
curl -X POST '${{ inputs.webhook-url }}' -H 'Content-Type: application/json' -d '{ text: "<${{ env.RUN_URL }}|${{ inputs.run-name }}> was cancelled"}' || true
@@ -1,26 +1,26 @@
name: Sync to Maven Central
description: 'Syncs a release to Maven Central and waits for it to be available for use'
description: Syncs a release to Maven Central and waits for it to be available for use
inputs:
jfrog-cli-config-token:
description: 'Config token for the JFrog CLI'
required: true
ossrh-s01-staging-profile:
description: 'Staging profile to use when syncing to Central'
required: true
ossrh-s01-token-password:
description: 'Password for authentication with s01.oss.sonatype.org'
spring-framework-version:
description: 'The version of Spring Framework that is being synced to Central'
required: true
ossrh-s01-token-username:
description: 'Username for authentication with s01.oss.sonatype.org'
required: true
spring-framework-version:
description: 'Version of Spring Framework that is being synced to Central'
ossrh-s01-token-password:
description: 'Password for authentication with s01.oss.sonatype.org'
required: true
ossrh-s01-staging-profile:
description: 'Staging profile to use when syncing to Central'
required: true
runs:
using: composite
steps:
- name: Set Up JFrog CLI
uses: jfrog/setup-jfrog-cli@f748a0599171a192a2668afee8d0497f7c1069df # v4.5.6
uses: jfrog/setup-jfrog-cli@105617d23456a69a92485207c4f28ae12297581d # v4.2.1
env:
JF_ENV_SPRING: ${{ inputs.jfrog-cli-config-token }}
- name: Download Release Artifacts
@@ -29,14 +29,14 @@ runs:
- name: Sync
uses: spring-io/nexus-sync-action@42477a2230a2f694f9eaa4643fa9e76b99b7ab84 # v0.0.1
with:
close: true
create: true
generate-checksums: true
password: ${{ inputs.ossrh-s01-token-password }}
release: true
staging-profile-name: ${{ inputs.ossrh-s01-staging-profile }}
upload: true
username: ${{ inputs.ossrh-s01-token-username }}
password: ${{ inputs.ossrh-s01-token-password }}
staging-profile-name: ${{ inputs.ossrh-s01-staging-profile }}
create: true
upload: true
close: true
release: true
generate-checksums: true
- name: Await
uses: ./.github/actions/await-http-resource
with:
+2 -1
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@@ -1,4 +1,5 @@
name: Backport Bot
on:
issues:
types: [labeled]
@@ -28,6 +29,6 @@ jobs:
run: wget https://github.com/spring-io/backport-bot/releases/download/latest/backport-bot-0.0.1-SNAPSHOT.jar
- name: Backport
env:
GITHUB_EVENT: ${{ toJSON(github.event) }}
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
GITHUB_EVENT: ${{ toJSON(github.event) }}
run: java -jar backport-bot-0.0.1-SNAPSHOT.jar --github.accessToken="$GITHUB_TOKEN" --github.event_name "$GITHUB_EVENT_NAME" --github.event "$GITHUB_EVENT"
+15 -15
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@@ -2,15 +2,15 @@ name: Build and Deploy Snapshot
on:
push:
branches:
- 6.2.x
- main
concurrency:
group: ${{ github.workflow }}-${{ github.ref }}
jobs:
build-and-deploy-snapshot:
name: Build and Deploy Snapshot
if: ${{ github.repository == 'spring-projects/spring-framework' }}
runs-on: ubuntu-latest
timeout-minutes: 60
if: ${{ github.repository == 'spring-projects/spring-framework' }}
steps:
- name: Check Out Code
uses: actions/checkout@v4
@@ -18,31 +18,31 @@ jobs:
id: build-and-publish
uses: ./.github/actions/build
with:
develocity-access-key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
develocity-access-key: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
publish: true
- name: Deploy
uses: spring-io/artifactory-deploy-action@dc1913008c0599f0c4b1fdafb6ff3c502b3565ea # v0.0.2
uses: spring-io/artifactory-deploy-action@26bbe925a75f4f863e1e529e85be2d0093cac116 # v0.0.1
with:
uri: 'https://repo.spring.io'
username: ${{ secrets.ARTIFACTORY_USERNAME }}
password: ${{ secrets.ARTIFACTORY_PASSWORD }}
build-name: 'spring-framework-6.2.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
build-name: 'spring-framework-6.2.x'
folder: 'deployment-repository'
password: ${{ secrets.ARTIFACTORY_PASSWORD }}
repository: 'libs-snapshot-local'
signing-key: ${{ secrets.GPG_PRIVATE_KEY }}
signing-passphrase: ${{ secrets.GPG_PASSPHRASE }}
uri: 'https://repo.spring.io'
username: ${{ secrets.ARTIFACTORY_USERNAME }}
- name: Send Notification
if: always()
uses: ./.github/actions/send-notification
if: always()
with:
webhook-url: ${{ secrets.GOOGLE_CHAT_WEBHOOK_URL }}
status: ${{ job.status }}
build-scan-url: ${{ steps.build-and-publish.outputs.build-scan-url }}
run-name: ${{ format('{0} | Linux | Java 17', github.ref_name) }}
status: ${{ job.status }}
webhook-url: ${{ secrets.GOOGLE_CHAT_WEBHOOK_URL }}
outputs:
version: ${{ steps.build-and-publish.outputs.version }}
verify:
+19 -6
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@@ -1,25 +1,38 @@
name: Build Pull Request
on: pull_request
permissions:
contents: read
jobs:
build:
name: Build Pull Request
if: ${{ github.repository == 'spring-projects/spring-framework' }}
runs-on: ubuntu-latest
timeout-minutes: 60
if: ${{ github.repository == 'spring-projects/spring-framework' }}
steps:
- name: Check Out Code
- name: Set up JDK 17
uses: actions/setup-java@v4
with:
java-version: '17'
distribution: 'liberica'
- name: Check Out
uses: actions/checkout@v4
- name: Validate Gradle Wrapper
uses: gradle/actions/wrapper-validation@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3.5.0
- name: Set Up Gradle
uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3.5.0
- name: Build
id: build
uses: ./.github/actions/build
env:
CI: 'true'
GRADLE_ENTERPRISE_URL: 'https://ge.spring.io'
run: ./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --no-parallel --continue build
- name: Print JVM Thread Dumps When Cancelled
if: cancelled()
uses: ./.github/actions/print-jvm-thread-dumps
if: cancelled()
- name: Upload Build Reports
if: failure()
uses: actions/upload-artifact@v4
if: failure()
with:
name: build-reports
path: '**/build/reports/'
+12 -11
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@@ -1,16 +1,15 @@
name: CI
on:
push:
branches:
- 6.2.x
schedule:
- cron: '30 9 * * *'
concurrency:
group: ${{ github.workflow }}-${{ github.ref }}
jobs:
ci:
name: '${{ matrix.os.name}} | Java ${{ matrix.java.version}}'
if: ${{ github.repository == 'spring-projects/spring-framework' }}
runs-on: ${{ matrix.os.id }}
timeout-minutes: 60
if: ${{ github.repository == 'spring-projects/spring-framework' }}
strategy:
matrix:
os:
@@ -21,7 +20,10 @@ jobs:
toolchain: false
- version: 21
toolchain: true
- version: 22
toolchain: true
- version: 23
early-access: true
toolchain: true
exclude:
- os:
@@ -41,16 +43,15 @@ jobs:
id: build
uses: ./.github/actions/build
with:
develocity-access-key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
java-early-access: ${{ matrix.java.early-access || 'false' }}
java-distribution: ${{ matrix.java.distribution }}
java-toolchain: ${{ matrix.java.toolchain }}
java-version: ${{ matrix.java.version }}
java-early-access: ${{ matrix.java.early-access || 'false' }}
java-toolchain: ${{ matrix.java.toolchain }}
develocity-access-key: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
- name: Send Notification
if: always()
uses: ./.github/actions/send-notification
if: always()
with:
webhook-url: ${{ secrets.GOOGLE_CHAT_WEBHOOK_URL }}
status: ${{ job.status }}
build-scan-url: ${{ steps.build.outputs.build-scan-url }}
run-name: ${{ format('{0} | {1} | Java {2}', github.ref_name, matrix.os.name, matrix.java.version) }}
status: ${{ job.status }}
webhook-url: ${{ secrets.GOOGLE_CHAT_WEBHOOK_URL }}
+2 -3
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@@ -14,15 +14,14 @@ permissions:
actions: write
jobs:
build:
name: Dispatch docs deployment
if: github.repository_owner == 'spring-projects'
runs-on: ubuntu-latest
if: github.repository_owner == 'spring-projects'
steps:
- name: Check out code
uses: actions/checkout@v4
with:
fetch-depth: 1
ref: docs-build
fetch-depth: 1
- name: Dispatch (partial build)
if: github.ref_type == 'branch'
env:
+79
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@@ -0,0 +1,79 @@
name: Release Milestone
on:
push:
tags:
- v6.2.0-M[1-9]
- v6.2.0-RC[1-9]
concurrency:
group: ${{ github.workflow }}-${{ github.ref }}
jobs:
build-and-stage-release:
if: ${{ github.repository == 'spring-projects/spring-framework' }}
name: Build and Stage Release
runs-on: ubuntu-latest
steps:
- name: Check Out Code
uses: actions/checkout@v4
- name: Build and Publish
id: build-and-publish
uses: ./.github/actions/build
with:
develocity-access-key: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
publish: true
- name: Stage Release
uses: spring-io/artifactory-deploy-action@26bbe925a75f4f863e1e529e85be2d0093cac116 # v0.0.1
with:
uri: 'https://repo.spring.io'
username: ${{ secrets.ARTIFACTORY_USERNAME }}
password: ${{ secrets.ARTIFACTORY_PASSWORD }}
build-name: ${{ format('spring-framework-{0}', steps.build-and-publish.outputs.version)}}
repository: 'libs-staging-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
outputs:
version: ${{ steps.build-and-publish.outputs.version }}
verify:
name: Verify
needs: build-and-stage-release
uses: ./.github/workflows/verify.yml
with:
staging: true
version: ${{ needs.build-and-stage-release.outputs.version }}
secrets:
google-chat-webhook-url: ${{ secrets.GOOGLE_CHAT_WEBHOOK_URL }}
repository-password: ${{ secrets.ARTIFACTORY_PASSWORD }}
repository-username: ${{ secrets.ARTIFACTORY_USERNAME }}
token: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
promote-release:
name: Promote Release
needs:
- build-and-stage-release
- verify
runs-on: ubuntu-latest
steps:
- name: Set up JFrog CLI
uses: jfrog/setup-jfrog-cli@105617d23456a69a92485207c4f28ae12297581d # v4.2.1
env:
JF_ENV_SPRING: ${{ secrets.JF_ARTIFACTORY_SPRING }}
- name: Promote build
run: jfrog rt build-promote ${{ format('spring-framework-{0}', needs.build-and-stage-release.outputs.version)}} ${{ github.run_number }} libs-milestone-local
create-github-release:
name: Create GitHub Release
needs:
- build-and-stage-release
- promote-release
runs-on: ubuntu-latest
steps:
- name: Check Out Code
uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
- name: Create GitHub Release
uses: ./.github/actions/create-github-release
with:
milestone: ${{ needs.build-and-stage-release.outputs.version }}
token: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
pre-release: true
+15 -15
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@@ -7,8 +7,8 @@ concurrency:
group: ${{ github.workflow }}-${{ github.ref }}
jobs:
build-and-stage-release:
name: Build and Stage Release
if: ${{ github.repository == 'spring-projects/spring-framework' }}
name: Build and Stage Release
runs-on: ubuntu-latest
steps:
- name: Check Out Code
@@ -17,37 +17,37 @@ jobs:
id: build-and-publish
uses: ./.github/actions/build
with:
develocity-access-key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
develocity-access-key: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
publish: true
- name: Stage Release
uses: spring-io/artifactory-deploy-action@dc1913008c0599f0c4b1fdafb6ff3c502b3565ea # v0.0.2
uses: spring-io/artifactory-deploy-action@26bbe925a75f4f863e1e529e85be2d0093cac116 # v0.0.1
with:
uri: 'https://repo.spring.io'
username: ${{ secrets.ARTIFACTORY_USERNAME }}
password: ${{ secrets.ARTIFACTORY_PASSWORD }}
build-name: ${{ format('spring-framework-{0}', steps.build-and-publish.outputs.version)}}
repository: 'libs-staging-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
build-name: ${{ format('spring-framework-{0}', steps.build-and-publish.outputs.version)}}
folder: 'deployment-repository'
password: ${{ secrets.ARTIFACTORY_PASSWORD }}
repository: 'libs-staging-local'
signing-key: ${{ secrets.GPG_PRIVATE_KEY }}
signing-passphrase: ${{ secrets.GPG_PASSPHRASE }}
uri: 'https://repo.spring.io'
username: ${{ secrets.ARTIFACTORY_USERNAME }}
outputs:
version: ${{ steps.build-and-publish.outputs.version }}
verify:
name: Verify
needs: build-and-stage-release
uses: ./.github/workflows/verify.yml
with:
staging: true
version: ${{ needs.build-and-stage-release.outputs.version }}
secrets:
google-chat-webhook-url: ${{ secrets.GOOGLE_CHAT_WEBHOOK_URL }}
repository-password: ${{ secrets.ARTIFACTORY_PASSWORD }}
repository-username: ${{ secrets.ARTIFACTORY_USERNAME }}
token: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
with:
staging: true
version: ${{ needs.build-and-stage-release.outputs.version }}
sync-to-maven-central:
name: Sync to Maven Central
needs:
@@ -73,7 +73,7 @@ jobs:
runs-on: ubuntu-latest
steps:
- name: Set up JFrog CLI
uses: jfrog/setup-jfrog-cli@dff217c085c17666e8849ebdbf29c8fe5e3995e6 # v4.5.2
uses: jfrog/setup-jfrog-cli@105617d23456a69a92485207c4f28ae12297581d # v4.2.1
env:
JF_ENV_SPRING: ${{ secrets.JF_ARTIFACTORY_SPRING }}
- name: Promote build
@@ -12,12 +12,11 @@ permissions:
jobs:
update-antora-ui-spring:
name: Update on Supported Branches
if: ${{ github.repository == 'spring-projects/spring-framework' }}
runs-on: ubuntu-latest
name: Update on Supported Branches
strategy:
matrix:
branch: [ '6.1.x' ]
branch: [ '6.0.x', '6.1.x', 'main' ]
steps:
- uses: spring-io/spring-doc-actions/update-antora-spring-ui@5a57bcc6a0da2a1474136cf29571b277850432bc
name: Update
@@ -26,9 +25,8 @@ jobs:
token: ${{ secrets.GITHUB_TOKEN }}
antora-file-path: 'framework-docs/antora-playbook.yml'
update-antora-ui-spring-docs-build:
name: Update on docs-build
if: ${{ github.repository == 'spring-projects/spring-framework' }}
runs-on: ubuntu-latest
name: Update on docs-build
steps:
- uses: spring-io/spring-doc-actions/update-antora-spring-ui@5a57bcc6a0da2a1474136cf29571b277850432bc
name: Update
@@ -0,0 +1,11 @@
name: "Validate Gradle Wrapper"
on: [push, pull_request]
permissions:
contents: read
jobs:
validation:
name: "Validate Gradle Wrapper"
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: gradle/actions/wrapper-validation@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3.5.0
+17 -23
View File
@@ -2,27 +2,21 @@ name: Verify
on:
workflow_call:
inputs:
version:
required: true
type: string
staging:
description: 'Whether the release to verify is in the staging repository'
required: false
default: false
type: boolean
version:
description: 'Version to verify'
required: true
type: string
secrets:
google-chat-webhook-url:
description: 'Google Chat Webhook URL'
required: true
repository-password:
description: 'Password for authentication with the repository'
required: false
repository-username:
description: 'Username for authentication with the repository'
required: false
repository-password:
required: false
google-chat-webhook-url:
required: true
token:
description: 'Token to use for authentication with GitHub'
required: true
jobs:
verify:
@@ -32,13 +26,13 @@ jobs:
- name: Check Out Release Verification Tests
uses: actions/checkout@v4
with:
ref: 'v0.0.2'
repository: spring-projects/spring-framework-release-verification
ref: 'v0.0.2'
token: ${{ secrets.token }}
- name: Check Out Send Notification Action
uses: actions/checkout@v4
with:
path: send-notification
path: spring-framework
sparse-checkout: .github/actions/send-notification
- name: Set Up Java
uses: actions/setup-java@v4
@@ -46,7 +40,7 @@ jobs:
distribution: 'liberica'
java-version: 17
- name: Set Up Gradle
uses: gradle/actions/setup-gradle@0bdd871935719febd78681f197cd39af5b6e16a6 # v4.2.2
uses: gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70 # v3.5.0
with:
cache-read-only: false
- name: Configure Gradle Properties
@@ -56,22 +50,22 @@ jobs:
echo 'org.gradle.daemon=false' >> $HOME/.gradle/gradle.properties
- name: Run Release Verification Tests
env:
RVT_OSS_REPOSITORY_PASSWORD: ${{ secrets.repository-password }}
RVT_OSS_REPOSITORY_USERNAME: ${{ secrets.repository-username }}
RVT_VERSION: ${{ inputs.version }}
RVT_RELEASE_TYPE: oss
RVT_STAGING: ${{ inputs.staging }}
RVT_VERSION: ${{ inputs.version }}
RVT_OSS_REPOSITORY_USERNAME: ${{ secrets.repository-username }}
RVT_OSS_REPOSITORY_PASSWORD: ${{ secrets.repository-password }}
run: ./gradlew spring-framework-release-verification-tests:test
- name: Upload Build Reports on Failure
if: failure()
uses: actions/upload-artifact@v4
if: failure()
with:
name: build-reports
path: '**/build/reports/'
- name: Send Notification
uses: ./spring-framework/.github/actions/send-notification
if: failure()
uses: ./send-notification/.github/actions/send-notification
with:
run-name: ${{ format('{0} | Verification | {1}', github.ref_name, inputs.version) }}
status: ${{ job.status }}
webhook-url: ${{ secrets.google-chat-webhook-url }}
status: ${{ job.status }}
run-name: ${{ format('{0} | Verification | {1}', github.ref_name, inputs.version) }}
+1 -2
View File
@@ -42,8 +42,7 @@ spring-*/src/main/java/META-INF/MANIFEST.MF
*.iml
*.ipr
*.iws
.idea/*
!.idea/icon.svg
.idea
out
test-output
atlassian-ide-plugin.xml
-52
View File
@@ -1,52 +0,0 @@
<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 24.0.3, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
viewBox="0 0 510 510" style="enable-background:new 0 0 510 510;" xml:space="preserve">
<style type="text/css">
.st0{fill:#6DB33F;}
</style>
<title>icon-framework</title>
<g id="Layer_2_1_">
<g id="Layer_1-2">
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c5.5,33.5,19.9,63.8,43.7,87.5c23.3,23.3,53.3,38.2,87.7,43.8C190,498.8,221.5,510,255,510s65-11.2,92.6-30.9
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Before

Width:  |  Height:  |  Size: 4.8 KiB

+1 -1
View File
@@ -1,3 +1,3 @@
# Enable auto-env through the sdkman_auto_env config
# Add key=value pairs of SDKs to use below
java=17.0.13-librca
java=17.0.12-librca
+6 -7
View File
@@ -16,7 +16,7 @@ First off, thank you for taking the time to contribute! :+1: :tada:
### Code of Conduct
This project is governed by the [Spring Code of Conduct](https://github.com/spring-projects/spring-framework#coc-ov-file).
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.
@@ -65,6 +65,10 @@ follow-up reports will need to be created as new issues with a fresh description
#### Submit a Pull Request
1. If you have not previously done so, please sign the
[Contributor License Agreement](https://cla.spring.io/sign/spring). You will be reminded
automatically when you submit the PR.
1. Should you create an issue first? No, just create the pull request and use the
description to provide context and motivation, as you would for an issue. If you want
to start a discussion first or have already created an issue, once a pull request is
@@ -81,13 +85,8 @@ multiple edits or corrections of the same logical change. See
[Rewriting History section of Pro Git](https://git-scm.com/book/en/Git-Tools-Rewriting-History)
for an overview of streamlining the commit history.
1. All commits must include a _Signed-off-by_ trailer at the end of each commit message
to indicate that the contributor agrees to the Developer Certificate of Origin.
For additional details, please refer to the blog post
[Hello DCO, Goodbye CLA: Simplifying Contributions to Spring](https://spring.io/blog/2025/01/06/hello-dco-goodbye-cla-simplifying-contributions-to-spring).
1. Format commit messages using 55 characters for the subject line, 72 characters per line
for the description, followed by the issue fixed, for example, `Closes gh-22276`. See the
for the description, followed by the issue fixed, e.g. `Closes gh-22276`. See the
[Commit Guidelines section of Pro Git](https://git-scm.com/book/en/Distributed-Git-Contributing-to-a-Project#Commit-Guidelines)
for best practices around commit messages, and use `git log` to see some examples.
+1 -1
View File
@@ -6,7 +6,7 @@ Spring provides everything required beyond the Java programming language for cre
## Code of Conduct
This project is governed by the [Spring Code of Conduct](https://github.com/spring-projects/spring-framework/?tab=coc-ov-file#contributor-code-of-conduct). 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@spring.io.
## Access to Binaries
+11 -5
View File
@@ -1,10 +1,16 @@
# Reporting a Vulnerability
Please, [open a draft security advisory](https://github.com/spring-projects/security-advisories/security/advisories/new) if you need to disclose and discuss a security issue in private with the Spring Framework team. Note that we only accept reports against [supported versions](https://spring.io/projects/spring-framework#support).
For more details, check out our [security policy](https://spring.io/security-policy).
# Security Policy
## JAR signing
Spring Framework JARs released on Maven Central are signed.
You'll find more information about the key here: https://spring.io/GPG-KEY-spring.txt
## Supported Versions
Please see the
[Spring Framework Versions](https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-Versions)
wiki page.
## Reporting a Vulnerability
Please see https://spring.io/security-policy.
+7 -7
View File
@@ -9,7 +9,7 @@ plugins {
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'
id "net.ltgt.errorprone" version "4.1.0" apply false
id "net.ltgt.errorprone" version "3.1.0" apply false
}
ext {
@@ -25,17 +25,17 @@ configure(allprojects) { project ->
repositories {
mavenCentral()
maven {
url = "https://repo.spring.io/milestone"
url "https://repo.spring.io/milestone"
content {
// Netty 5 optional support
includeGroup 'io.projectreactor.netty'
}
}
if (version.contains('-')) {
maven { url = "https://repo.spring.io/milestone" }
maven { url "https://repo.spring.io/milestone" }
}
if (version.endsWith('-SNAPSHOT')) {
maven { url = "https://repo.spring.io/snapshot" }
maven { url "https://repo.spring.io/snapshot" }
}
}
configurations.all {
@@ -91,18 +91,18 @@ configure([rootProject] + javaProjects) { project ->
"https://docs.oracle.com/en/java/javase/17/docs/api/",
"https://jakarta.ee/specifications/platform/9/apidocs/",
"https://docs.jboss.org/hibernate/orm/5.6/javadocs/",
"https://eclipse.dev/aspectj/doc/latest/runtime-api/",
"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://hc.apache.org/httpcomponents-client-5.4.x/current/httpclient5/apidocs/",
"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/5.12.2/api/",
// "https://junit.org/junit5/docs/5.10.2/api/",
"https://www.reactive-streams.org/reactive-streams-1.0.3-javadoc/",
//"https://javadoc.io/static/io.rsocket/rsocket-core/1.1.1/",
"https://r2dbc.io/spec/1.0.0.RELEASE/api/",
@@ -1,5 +1,5 @@
/*
* Copyright 2002-2025 the original author or authors.
* 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.
@@ -50,7 +50,7 @@ public class CheckstyleConventions {
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("10.23.0");
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();
@@ -64,7 +64,7 @@ public class CheckstyleConventions {
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/**", "buildSrc/build/**");
"**/.classpath", "**/.project", "**/.gradle/**", "**/node_modules/**");
List<String> buildFolders = List.of("bin", "build", "out");
project.allprojects(subproject -> {
Path rootPath = project.getRootDir().toPath();
@@ -27,7 +27,6 @@ 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.TaskProvider;
import org.gradle.api.tasks.testing.Test;
import org.gradle.testing.base.TestingExtension;
@@ -53,7 +52,7 @@ public class RuntimeHintsAgentPlugin implements Plugin<Project> {
TestingExtension testing = project.getExtensions().getByType(TestingExtension.class);
JvmTestSuite jvmTestSuite = (JvmTestSuite) testing.getSuites().getByName("test");
RuntimeHintsAgentExtension agentExtension = createRuntimeHintsAgentExtension(project);
TaskProvider<Test> agentTest = project.getTasks().register(RUNTIMEHINTS_TEST_TASK, Test.class, test -> {
Test agentTest = project.getTasks().create(RUNTIMEHINTS_TEST_TASK, Test.class, test -> {
test.useJUnitPlatform(options -> {
options.includeTags("RuntimeHintsTests");
});
@@ -64,7 +63,7 @@ public class RuntimeHintsAgentPlugin implements Plugin<Project> {
test.setClasspath(jvmTestSuite.getSources().getRuntimeClasspath());
test.getJvmArgumentProviders().add(createRuntimeHintsAgentArgumentProvider(project, agentExtension));
});
project.getTasks().named("check", task -> task.dependsOn(agentTest));
project.getTasks().getByName("check", task -> task.dependsOn(agentTest));
project.getDependencies().add(CONFIGURATION_NAME, project.project(":spring-core-test"));
});
}
+4 -5
View File
@@ -9,7 +9,7 @@ apply from: "${rootDir}/gradle/publications.gradle"
repositories {
maven {
url = "https://repo.spring.io/release"
url "https://repo.spring.io/release"
}
}
@@ -31,9 +31,8 @@ javadoc {
destinationDir = project.java.docsDir.dir("javadoc-api").get().asFile
splitIndex = true
links(rootProject.ext.javadocLinks)
// Check for 'syntax' and 'reference' during linting.
addBooleanOption('Xdoclint:syntax,reference', true)
addBooleanOption('Werror', true) // fail build on Javadoc warnings
addBooleanOption('Xdoclint:syntax,reference', true) // only check syntax and reference with doclint
addBooleanOption('Werror', true) // fail build on Javadoc warnings
}
maxMemory = "1024m"
doFirst {
@@ -88,7 +87,7 @@ tasks.register('schemaZip', Zip) {
archiveClassifier.set("schema")
description = "Builds -${archiveClassifier} archive containing all " +
"XSDs for deployment at https://springframework.org/schema."
duplicatesStrategy = DuplicatesStrategy.EXCLUDE
duplicatesStrategy DuplicatesStrategy.EXCLUDE
moduleProjects.each { module ->
def Properties schemas = new Properties();
+2 -2
View File
@@ -13,7 +13,7 @@ content:
- url: https://github.com/spring-projects/spring-framework
# Refname matching:
# https://docs.antora.org/antora/latest/playbook/content-refname-matching/
branches: ['main', '{6..9}.+({1..9}).x']
branches: ['main', '{6..9}.+({0..9}).x']
tags: ['v{6..9}.+({0..9}).+({0..9})?(-{RC,M}*)', '!(v6.0.{0..8})', '!(v6.0.0-{RC,M}{0..9})']
start_path: framework-docs
asciidoc:
@@ -36,4 +36,4 @@ runtime:
failure_level: warn
ui:
bundle:
url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.18/ui-bundle.zip
url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.16/ui-bundle.zip
+1 -3
View File
@@ -42,8 +42,7 @@ asciidoc:
spring-framework-reference: '{spring-framework-docs-root}/{spring-version}/reference'
#
# Other Spring portfolio projects
spring-boot-docs: '{docs-site}/spring-boot'
spring-boot-docs-ref: '{spring-boot-docs}/reference'
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
@@ -75,7 +74,6 @@ asciidoc:
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'
petclinic-github-org: 'https://github.com/spring-petclinic'
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'
+28 -29
View File
@@ -37,39 +37,38 @@ javadoc {
repositories {
maven {
url = "https://repo.spring.io/release"
url "https://repo.spring.io/release"
}
}
dependencies {
implementation(project(":spring-aspects"))
implementation(project(":spring-context"))
implementation(project(":spring-context-support"))
implementation(project(":spring-core-test"))
implementation(project(":spring-jdbc"))
implementation(project(":spring-jms"))
implementation(project(":spring-test"))
implementation(project(":spring-web"))
implementation(project(":spring-webflux"))
implementation(project(":spring-webmvc"))
implementation(project(":spring-websocket"))
api(project(":spring-aspects"))
api(project(":spring-context"))
api(project(":spring-context-support"))
api(project(":spring-jdbc"))
api(project(":spring-jms"))
api(project(":spring-test"))
api(project(":spring-web"))
api(project(":spring-webflux"))
api(project(":spring-webmvc"))
api(project(":spring-websocket"))
implementation("com.fasterxml.jackson.core:jackson-databind")
implementation("com.fasterxml.jackson.module:jackson-module-parameter-names")
implementation("com.mchange:c3p0:0.9.5.5")
implementation("com.oracle.database.jdbc:ojdbc11")
implementation("io.projectreactor.netty:reactor-netty-http")
implementation("jakarta.jms:jakarta.jms-api")
implementation("jakarta.servlet:jakarta.servlet-api")
implementation("jakarta.resource:jakarta.resource-api")
implementation("jakarta.validation:jakarta.validation-api")
implementation("jakarta.websocket:jakarta.websocket-client-api")
implementation("javax.cache:cache-api")
implementation("org.apache.activemq:activemq-ra:6.1.2")
implementation("org.apache.commons:commons-dbcp2:2.11.0")
implementation("org.aspectj:aspectjweaver")
api("com.fasterxml.jackson.core:jackson-databind")
api("com.fasterxml.jackson.module:jackson-module-parameter-names")
api("com.mchange:c3p0:0.9.5.5")
api("com.oracle.database.jdbc:ojdbc11")
api("io.projectreactor.netty:reactor-netty-http")
api("jakarta.jms:jakarta.jms-api")
api("jakarta.servlet:jakarta.servlet-api")
api("jakarta.resource:jakarta.resource-api")
api("jakarta.validation:jakarta.validation-api")
api("javax.cache:cache-api")
api("org.apache.activemq:activemq-ra:6.1.2")
api("org.apache.commons:commons-dbcp2:2.11.0")
api("org.aspectj:aspectjweaver")
api("org.eclipse.jetty.websocket:jetty-websocket-jetty-api")
api("org.jetbrains.kotlin:kotlin-stdlib")
implementation(project(":spring-core-test"))
implementation("org.assertj:assertj-core")
implementation("org.eclipse.jetty.websocket:jetty-websocket-jetty-api")
implementation("org.jetbrains.kotlin:kotlin-stdlib")
implementation("org.junit.jupiter:junit-jupiter-api")
}
+2 -4
View File
@@ -60,7 +60,6 @@
**** xref:core/expressions/language-ref/constructors.adoc[]
**** xref:core/expressions/language-ref/variables.adoc[]
**** xref:core/expressions/language-ref/functions.adoc[]
**** xref:core/expressions/language-ref/varargs.adoc[]
**** xref:core/expressions/language-ref/bean-references.adoc[]
**** xref:core/expressions/language-ref/operator-ternary.adoc[]
**** xref:core/expressions/language-ref/operator-elvis.adoc[]
@@ -452,6 +451,5 @@
** xref:languages/groovy.adoc[]
** xref:languages/dynamic.adoc[]
* xref:appendix.adoc[]
* {spring-framework-docs-root}/{spring-version}/javadoc-api/[Java API,window=_blank, role=link-external]
* {spring-framework-api-kdoc}/[Kotlin API,window=_blank, role=link-external]
* {spring-framework-wiki}[Wiki, window=_blank, role=link-external]
* {spring-framework-wiki}[Wiki]
@@ -23,12 +23,6 @@ The following table lists all currently supported Spring properties.
|===
| Name | Description
| `spring.aop.ajc.ignore`
| Instructs Spring to ignore ajc-compiled aspects for Spring AOP proxying, restoring traditional
Spring behavior for scenarios where both weaving and AspectJ auto-proxying are enabled. See
{spring-framework-api}++/aop/aspectj/annotation/AbstractAspectJAdvisorFactory.html#IGNORE_AJC_PROPERTY_NAME++[`AbstractAspectJAdvisorFactory`]
for details.
| `spring.aot.enabled`
| Indicates the application should run with AOT generated artifacts. See
xref:core/aot.adoc[Ahead of Time Optimizations] and
@@ -38,7 +32,7 @@ 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++[`StandardBeanInfoFactory`]
{spring-framework-api}++/beans/StandardBeanInfoFactory.html#IGNORE_BEANINFO_PROPERTY_NAME++[`CachedIntrospectionResults`]
for details.
| `spring.cache.reactivestreams.ignore`
@@ -55,13 +49,15 @@ 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
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
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.
@@ -92,12 +88,6 @@ the repeated JNDI lookup overhead. See
{spring-framework-api}++/jndi/JndiLocatorDelegate.html#IGNORE_JNDI_PROPERTY_NAME++[`JndiLocatorDelegate`]
for details.
| `spring.locking.strict`
| Instructs Spring to enforce strict locking during bean creation, rather than the mix of
strict and lenient locking that 6.2 applies by default. See
{spring-framework-api}++/beans/factory/support/DefaultListableBeanFactory.html#STRICT_LOCKING_PROPERTY_NAME++[`DefaultListableBeanFactory`]
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`]
@@ -33,11 +33,11 @@ arbitrary advice types. This section describes the basic concepts and standard a
[[aop-api-advice-around]]
=== Interception Around Advice
The most fundamental advice type in Spring is _interception around advice_.
The most fundamental advice type in Spring is interception around advice.
Spring is compliant with the AOP Alliance interface for around advice that uses method
interception. Classes that implement around advice should therefore implement the
following `MethodInterceptor` interface from the `org.aopalliance.intercept` package:
Spring is compliant with the AOP `Alliance` interface for around advice that uses method
interception. Classes that implement `MethodInterceptor` and that implement around advice should also implement the
following interface:
[source,java,indent=0,subs="verbatim,quotes"]
----
@@ -49,8 +49,8 @@ following `MethodInterceptor` interface from the `org.aopalliance.intercept` pac
The `MethodInvocation` argument to the `invoke()` method exposes the method being
invoked, the target join point, the AOP proxy, and the arguments to the method. The
`invoke()` method should return the invocation's result: typically the return value of
the join point.
`invoke()` method should return the invocation's result: the return value of the join
point.
The following example shows a simple `MethodInterceptor` implementation:
@@ -58,30 +58,30 @@ The following example shows a simple `MethodInterceptor` implementation:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class DebugInterceptor implements MethodInterceptor {
public Object invoke(MethodInvocation invocation) throws Throwable {
System.out.println("Before: invocation=[" + invocation + "]");
Object result = invocation.proceed();
Object rval = invocation.proceed();
System.out.println("Invocation returned");
return result;
return rval;
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class DebugInterceptor : MethodInterceptor {
override fun invoke(invocation: MethodInvocation): Any {
println("Before: invocation=[$invocation]")
val result = invocation.proceed()
val rval = invocation.proceed()
println("Invocation returned")
return result
return rval
}
}
----
@@ -105,7 +105,7 @@ currently define pointcut interfaces.
[[aop-api-advice-before]]
=== Before Advice
A simpler advice type is a _before advice_. This does not need a `MethodInvocation`
A simpler advice type is a before advice. This does not need a `MethodInvocation`
object, since it is called only before entering the method.
The main advantage of a before advice is that there is no need to invoke the `proceed()`
@@ -122,6 +122,10 @@ The following listing shows the `MethodBeforeAdvice` interface:
}
----
(Spring's API design would allow for
field before advice, although the usual objects apply to field interception and it is
unlikely for Spring to ever implement it.)
Note that the return type is `void`. Before advice can insert custom behavior before the join
point runs but cannot change the return value. If a before advice throws an
exception, it stops further execution of the interceptor chain. The exception
@@ -135,7 +139,7 @@ The following example shows a before advice in Spring, which counts all method i
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class CountingBeforeAdvice implements MethodBeforeAdvice {
@@ -153,7 +157,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class CountingBeforeAdvice : MethodBeforeAdvice {
@@ -172,10 +176,10 @@ TIP: Before advice can be used with any pointcut.
[[aop-api-advice-throws]]
=== Throws Advice
_Throws advice_ is invoked after the return of the join point if the join point threw
Throws advice is invoked after the return of the join point if the join point threw
an exception. Spring offers typed throws advice. Note that this means that the
`org.springframework.aop.ThrowsAdvice` interface does not contain any methods. It is a
marker interface identifying that the given object implements one or more typed throws
tag interface identifying that the given object implements one or more typed throws
advice methods. These should be in the following form:
[source,java,indent=0,subs="verbatim,quotes"]
@@ -185,16 +189,15 @@ advice methods. These should be in the following form:
Only the last argument is required. The method signatures may have either one or four
arguments, depending on whether the advice method is interested in the method and
arguments. The next two listings show classes that are examples of throws advice.
arguments. The next two listing show classes that are examples of throws advice.
The following advice is invoked if a `RemoteException` is thrown (including subclasses of
`RemoteException`):
The following advice is invoked if a `RemoteException` is thrown (including from subclasses):
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class RemoteThrowsAdvice implements ThrowsAdvice {
@@ -206,7 +209,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class RemoteThrowsAdvice : ThrowsAdvice {
@@ -217,15 +220,15 @@ Kotlin::
----
======
Unlike the preceding advice, the next example declares four arguments, so that it has
access to the invoked method, method arguments, and target object. The following advice
is invoked if a `ServletException` is thrown:
Unlike the preceding
advice, the next example declares four arguments, so that it has access to the invoked method, method
arguments, and target object. The following advice is invoked if a `ServletException` is thrown:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ServletThrowsAdviceWithArguments implements ThrowsAdvice {
@@ -237,7 +240,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ServletThrowsAdviceWithArguments : ThrowsAdvice {
@@ -256,7 +259,7 @@ methods can be combined in a single class. The following listing shows the final
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static class CombinedThrowsAdvice implements ThrowsAdvice {
@@ -272,7 +275,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class CombinedThrowsAdvice : ThrowsAdvice {
@@ -301,7 +304,7 @@ TIP: Throws advice can be used with any pointcut.
[[aop-api-advice-after-returning]]
=== After Returning Advice
An _after returning advice_ in Spring must implement the
An after returning advice in Spring must implement the
`org.springframework.aop.AfterReturningAdvice` interface, which the following listing shows:
[source,java,indent=0,subs="verbatim,quotes"]
@@ -323,7 +326,7 @@ not thrown exceptions:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class CountingAfterReturningAdvice implements AfterReturningAdvice {
@@ -342,7 +345,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class CountingAfterReturningAdvice : AfterReturningAdvice {
@@ -365,7 +368,7 @@ TIP: After returning advice can be used with any pointcut.
[[aop-api-advice-introduction]]
=== Introduction Advice
Spring treats _introduction advice_ as a special kind of interception advice.
Spring treats introduction advice as a special kind of interception advice.
Introduction requires an `IntroductionAdvisor` and an `IntroductionInterceptor` that
implement the following interface:
@@ -417,7 +420,7 @@ introduce the following interface to one or more objects:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public interface Lockable {
void lock();
@@ -428,7 +431,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
interface Lockable {
fun lock()
@@ -477,7 +480,7 @@ The following example shows the example `LockMixin` class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class LockMixin extends DelegatingIntroductionInterceptor implements Lockable {
@@ -507,7 +510,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class LockMixin : DelegatingIntroductionInterceptor(), Lockable {
@@ -553,7 +556,7 @@ The following example shows our `LockMixinAdvisor` class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class LockMixinAdvisor extends DefaultIntroductionAdvisor {
@@ -565,7 +568,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class LockMixinAdvisor : DefaultIntroductionAdvisor(LockMixin(), Lockable::class.java)
----
@@ -10,7 +10,7 @@ following methods:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Advisor[] getAdvisors();
@@ -35,7 +35,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun getAdvisors(): Array<Advisor>
@@ -90,7 +90,7 @@ manipulating its advice:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Advised advised = (Advised) myObject;
Advisor[] advisors = advised.getAdvisors();
@@ -110,7 +110,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val advised = myObject as Advised
val advisors = advised.advisors
@@ -196,14 +196,14 @@ follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Person person = (Person) factory.getBean("person");
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val person = factory.getBean("person") as Person
----
@@ -187,7 +187,7 @@ following example shows how to subclass `StaticMethodMatcherPointcut`:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
class TestStaticPointcut extends StaticMethodMatcherPointcut {
@@ -199,7 +199,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class TestStaticPointcut : StaticMethodMatcherPointcut() {
@@ -12,7 +12,7 @@ interceptor and one advisor:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ProxyFactory factory = new ProxyFactory(myBusinessInterfaceImpl);
factory.addAdvice(myMethodInterceptor);
@@ -22,7 +22,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val factory = ProxyFactory(myBusinessInterfaceImpl)
factory.addAdvice(myMethodInterceptor)
@@ -38,7 +38,7 @@ You can change the target by using the `swap()` method on HotSwappableTargetSour
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
HotSwappableTargetSource swapper = (HotSwappableTargetSource) beanFactory.getBean("swapper");
Object oldTarget = swapper.swap(newTarget);
@@ -46,7 +46,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val swapper = beanFactory.getBean("swapper") as HotSwappableTargetSource
val oldTarget = swapper.swap(newTarget)
@@ -152,7 +152,7 @@ The cast is defined as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
PoolingConfig conf = (PoolingConfig) beanFactory.getBean("businessObject");
System.out.println("Max pool size is " + conf.getMaxSize());
@@ -160,7 +160,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val conf = beanFactory.getBean("businessObject") as PoolingConfig
println("Max pool size is " + conf.maxSize)
@@ -15,7 +15,7 @@ The basic usage for this class is very simple, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
// create a factory that can generate a proxy for the given target object
AspectJProxyFactory factory = new AspectJProxyFactory(targetObject);
@@ -34,7 +34,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
// create a factory that can generate a proxy for the given target object
val factory = AspectJProxyFactory(targetObject)
@@ -17,7 +17,7 @@ The following example uses an inline pointcut expression.
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@@ -34,7 +34,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.Before
@@ -57,7 +57,7 @@ as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@@ -74,7 +74,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.Before
@@ -101,7 +101,7 @@ You can declare it by using the `@AfterReturning` annotation.
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.AfterReturning;
@@ -118,7 +118,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.AfterReturning
@@ -146,7 +146,7 @@ access, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.AfterReturning;
@@ -165,7 +165,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.AfterReturning
@@ -204,7 +204,7 @@ following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.AfterThrowing;
@@ -221,7 +221,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.AfterThrowing
@@ -247,7 +247,7 @@ The following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.AfterThrowing;
@@ -266,7 +266,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.AfterThrowing
@@ -311,7 +311,7 @@ purposes. The following example shows how to use after finally advice:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.After;
@@ -328,7 +328,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.After
@@ -417,7 +417,7 @@ The following example shows how to use around advice:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Around;
@@ -438,7 +438,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.Around
@@ -500,7 +500,7 @@ You could write the following:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Before("execution(* com.xyz.dao.*.*(..)) && args(account,..)")
public void validateAccount(Account account) {
@@ -510,7 +510,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Before("execution(* com.xyz.dao.*.*(..)) && args(account,..)")
fun validateAccount(account: Account) {
@@ -533,7 +533,7 @@ from the advice. This would look as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Pointcut("execution(* com.xyz.dao.*.*(..)) && args(account,..)")
private void accountDataAccessOperation(Account account) {}
@@ -546,7 +546,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Pointcut("execution(* com.xyz.dao.*.*(..)) && args(account,..)")
private fun accountDataAccessOperation(account: Account) {
@@ -572,7 +572,7 @@ The following shows the definition of the `@Auditable` annotation:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@@ -583,7 +583,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Retention(AnnotationRetention.RUNTIME)
@Target(AnnotationTarget.FUNCTION)
@@ -597,7 +597,7 @@ The following shows the advice that matches the execution of `@Auditable` method
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Before("com.xyz.Pointcuts.publicMethod() && @annotation(auditable)") // <1>
public void audit(Auditable auditable) {
@@ -609,7 +609,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Before("com.xyz.Pointcuts.publicMethod() && @annotation(auditable)") // <1>
fun audit(auditable: Auditable) {
@@ -630,7 +630,7 @@ you have a generic type like the following:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public interface Sample<T> {
void sampleGenericMethod(T param);
@@ -640,7 +640,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
interface Sample<T> {
fun sampleGenericMethod(param: T)
@@ -656,7 +656,7 @@ tying the advice parameter to the parameter type for which you want to intercept
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Before("execution(* ..Sample+.sampleGenericMethod(*)) && args(param)")
public void beforeSampleMethod(MyType param) {
@@ -666,7 +666,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Before("execution(* ..Sample+.sampleGenericMethod(*)) && args(param)")
fun beforeSampleMethod(param: MyType) {
@@ -682,7 +682,7 @@ pointcut as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Before("execution(* ..Sample+.sampleGenericCollectionMethod(*)) && args(param)")
public void beforeSampleMethod(Collection<MyType> param) {
@@ -692,7 +692,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Before("execution(* ..Sample+.sampleGenericCollectionMethod(*)) && args(param)")
fun beforeSampleMethod(param: Collection<MyType>) {
@@ -756,7 +756,7 @@ The following example shows how to use the `argNames` attribute:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Before(
value = "com.xyz.Pointcuts.publicMethod() && target(bean) && @annotation(auditable)", // <1>
@@ -771,7 +771,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Before(
value = "com.xyz.Pointcuts.publicMethod() && target(bean) && @annotation(auditable)", // <1>
@@ -794,7 +794,7 @@ point object, the `argNames` attribute does not need to include it:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Before(
value = "com.xyz.Pointcuts.publicMethod() && target(bean) && @annotation(auditable)", // <1>
@@ -809,7 +809,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Before(
value = "com.xyz.Pointcuts.publicMethod() && target(bean) && @annotation(auditable)", // <1>
@@ -833,7 +833,7 @@ the `argNames` attribute:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Before("com.xyz.Pointcuts.publicMethod()") // <1>
public void audit(JoinPoint jp) {
@@ -844,7 +844,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Before("com.xyz.Pointcuts.publicMethod()") // <1>
fun audit(jp: JoinPoint) {
@@ -867,7 +867,7 @@ The following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Around("execution(List<Account> find*(..)) && " +
"com.xyz.CommonPointcuts.inDataAccessLayer() && " +
@@ -882,7 +882,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Around("execution(List<Account> find*(..)) && " +
"com.xyz.CommonPointcuts.inDataAccessLayer() && " +
@@ -17,7 +17,7 @@ annotation. Consider the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Aspect("perthis(execution(* com.xyz..service.*.*(..)))")
public class MyAspect {
@@ -33,7 +33,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Aspect("perthis(execution(* com.xyz..service.*.*(..)))")
class MyAspect {
@@ -9,13 +9,13 @@ You can make an introduction by using the `@DeclareParents` annotation. This ann
is used to declare that matching types have a new parent (hence the name). For example,
given an interface named `UsageTracked` and an implementation of that interface named
`DefaultUsageTracked`, the following aspect declares that all implementors of service
interfaces also implement the `UsageTracked` interface (for example, for statistics via JMX):
interfaces also implement the `UsageTracked` interface (e.g. for statistics via JMX):
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Aspect
public class UsageTracking {
@@ -33,7 +33,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Aspect
class UsageTracking {
@@ -63,14 +63,14 @@ you would write the following:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
UsageTracked usageTracked = context.getBean("myService", UsageTracked.class);
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
val usageTracked = context.getBean<UsageTracked>("myService")
----
@@ -19,7 +19,7 @@ matches the execution of any method named `transfer`:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Pointcut("execution(* transfer(..))") // the pointcut expression
private void anyOldTransfer() {} // the pointcut signature
@@ -27,7 +27,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Pointcut("execution(* transfer(..))") // the pointcut expression
private fun anyOldTransfer() {} // the pointcut signature
@@ -150,7 +150,7 @@ pointcut expressions by name. The following example shows three pointcut express
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz;
@@ -174,7 +174,7 @@ trading module.
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
@@ -217,7 +217,7 @@ expressions for this purpose. Such a class typically resembles the following
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages",fold="none"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages",fold="none"]
----
package com.xyz;
@@ -279,7 +279,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages",fold="none"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages",fold="none"]
----
package com.xyz
@@ -59,7 +59,7 @@ For example, in the @AspectJ style you can write something like the following:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Pointcut("execution(* get*())")
public void propertyAccess() {}
@@ -73,7 +73,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Pointcut("execution(* get*())")
fun propertyAccess() {}
@@ -65,7 +65,7 @@ with less potential for errors. For example, you do not need to invoke the `proc
method on the `JoinPoint` used for around advice, and, hence, you cannot fail to invoke it.
All advice parameters are statically typed so that you work with advice parameters of
the appropriate type (for example, the type of the return value from a method execution) rather
the appropriate type (e.g. the type of the return value from a method execution) rather
than `Object` arrays.
The concept of join points matched by pointcuts is the key to AOP, which distinguishes
@@ -6,26 +6,22 @@ target object. JDK dynamic proxies are built into the JDK, whereas CGLIB is a co
open-source class definition library (repackaged into `spring-core`).
If the target object to be proxied implements at least one interface, a JDK dynamic
proxy is used, and all of the interfaces implemented by the target type are proxied.
If the target object does not implement any interfaces, a CGLIB proxy is created which
is a runtime-generated subclass of the target type.
proxy is used. All of the interfaces implemented by the target type are proxied.
If the target object does not implement any interfaces, a CGLIB proxy is created.
If you want to force the use of CGLIB proxying (for example, to proxy every method
defined for the target object, not only those implemented by its interfaces),
you can do so. However, you should consider the following issues:
* `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 for example, package-private methods in a parent class
from a different package cannot be advised because they are effectively private.
* The constructor of your proxied object will not be called twice, since the CGLIB proxy
instance is created through Objenesis. However, 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 Java 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
* With CGLIB, `final` methods cannot be advised, as they cannot be overridden in
runtime-generated subclasses.
* As of Spring 4.0, the constructor of your proxied object is NOT called twice anymore,
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
@@ -69,14 +65,15 @@ Spring AOP is proxy-based. It is vitally important that you grasp the semantics
what that last statement actually means before you write your own aspects or use any of
the Spring AOP-based aspects supplied with the Spring Framework.
Consider first the scenario where you have a plain-vanilla, un-proxied object reference,
as the following code snippet shows:
Consider first the scenario where you have a plain-vanilla, un-proxied,
nothing-special-about-it, straight object reference, as the following
code snippet shows:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public class SimplePojo implements Pojo {
@@ -93,7 +90,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
class SimplePojo : Pojo {
@@ -118,7 +115,7 @@ image::aop-proxy-plain-pojo-call.png[]
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public class Main {
@@ -132,7 +129,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun main() {
val pojo = SimplePojo()
@@ -151,7 +148,7 @@ image::aop-proxy-call.png[]
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public class Main {
@@ -169,7 +166,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun main() {
val factory = ProxyFactory(SimplePojo())
@@ -190,35 +187,26 @@ the interceptors (advice) that are relevant to that particular method call. Howe
once the call has finally reached the target object (the `SimplePojo` reference in
this case), any method calls that it may make on itself, such as `this.bar()` or
`this.foo()`, are going to be invoked against the `this` reference, and not the proxy.
This has important implications. It means that self invocation is not going to result
in the advice associated with a method invocation getting a chance to run. In other words,
self invocation via an explicit or implicit `this` reference will bypass the advice.
This has important implications. It means that self-invocation is not going to result
in the advice associated with a method invocation getting a chance to run.
To address that, you have the following options.
Avoid self invocation ::
The best approach (the term "best" is used loosely here) is to refactor your code such
that the self invocation does not happen. This does entail some work on your part, but
it is the best, least-invasive approach.
Inject a self reference ::
An alternative approach is to make use of
xref:core/beans/annotation-config/autowired.adoc#beans-autowired-annotation-self-injection[self injection],
and invoke methods on the proxy via the self reference instead of via `this`.
Use `AopContext.currentProxy()` ::
This last approach is highly discouraged, and we hesitate to point it out, in favor of
the previous options. However, as a last resort you can choose to tie the logic within
your class to Spring AOP, as the following example shows.
Okay, so what is to be done about this? The best approach (the term "best" is used
loosely here) is to refactor your code such that the self-invocation does not happen.
This does entail some work on your part, but it is the best, least-invasive approach.
The next approach is absolutely horrendous, and we hesitate to point it out, precisely
because it is so horrendous. You can (painful as it is to us) totally tie the logic
within your class to Spring AOP, as the following example shows:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public class SimplePojo implements Pojo {
public void foo() {
// This works, but it should be avoided if possible.
// this works, but... gah!
((Pojo) AopContext.currentProxy()).bar();
}
@@ -230,12 +218,12 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
class SimplePojo : Pojo {
fun foo() {
// This works, but it should be avoided if possible.
// this works, but... gah!
(AopContext.currentProxy() as Pojo).bar()
}
@@ -246,16 +234,16 @@ Kotlin::
----
======
The use of `AopContext.currentProxy()` totally couples your code to Spring AOP, and it
makes the class itself aware of the fact that it is being used in an AOP context, which
reduces some of the benefits of AOP. It also requires that the `ProxyFactory` is
configured to expose the proxy, as the following example shows:
This totally couples your code to Spring AOP, and it makes the class itself aware of
the fact that it is being used in an AOP context, which flies in the face of AOP. It
also requires some additional configuration when the proxy is being created, as the
following example shows:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public class Main {
@@ -274,7 +262,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun main() {
val factory = ProxyFactory(SimplePojo())
@@ -289,6 +277,9 @@ Kotlin::
----
======
NOTE: AspectJ compile-time weaving and load-time weaving do not have this self-invocation
issue because they apply advice within the bytecode instead of via a proxy.
Finally, it must be noted that AspectJ does not have this self-invocation issue because
it is not a proxy-based AOP framework.
@@ -136,7 +136,7 @@ parameters of the matching names, as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public void monitor(Object service) {
// ...
@@ -145,7 +145,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun monitor(service: Any) {
// ...
@@ -282,14 +282,14 @@ example, you can declare the method signature as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public void doAccessCheck(Object retVal) {...
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun doAccessCheck(retVal: Any) {...
----
@@ -340,14 +340,14 @@ The type of this parameter constrains matching in the same way as described for
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public void doRecoveryActions(DataAccessException dataAccessEx) {...
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun doRecoveryActions(dataAccessEx: DataAccessException) {...
----
@@ -421,7 +421,7 @@ The implementation of the `doBasicProfiling` advice can be exactly the same as i
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable {
// start stopwatch
@@ -433,7 +433,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun doBasicProfiling(pjp: ProceedingJoinPoint): Any? {
// start stopwatch
@@ -475,7 +475,7 @@ some around advice used in conjunction with a number of strongly typed parameter
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz.service;
@@ -494,7 +494,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz.service
@@ -521,7 +521,7 @@ proceed with the method call. The presence of this parameter is an indication th
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz;
@@ -545,7 +545,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
@@ -610,7 +610,7 @@ Consider the following driver script:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public class Boot {
@@ -624,7 +624,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun main() {
val ctx = ClassPathXmlApplicationContext("beans.xml")
@@ -714,7 +714,7 @@ The class that backs the `usageTracking` bean would then contain the following m
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public void recordUsage(UsageTracked usageTracked) {
usageTracked.incrementUseCount();
@@ -723,7 +723,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun recordUsage(usageTracked: UsageTracked) {
usageTracked.incrementUseCount()
@@ -742,14 +742,14 @@ following:
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
UsageTracked usageTracked = context.getBean("myService", UsageTracked.class);
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
val usageTracked = context.getBean("myService", UsageTracked.class)
----
@@ -829,7 +829,7 @@ call `proceed` multiple times. The following listing shows the basic aspect impl
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
public class ConcurrentOperationExecutor implements Ordered {
@@ -869,7 +869,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
class ConcurrentOperationExecutor : Ordered {
@@ -953,7 +953,7 @@ to annotate the implementation of service operations, as the following example s
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Retention(RetentionPolicy.RUNTIME)
// marker annotation
@@ -963,7 +963,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Retention(AnnotationRetention.RUNTIME)
// marker annotation
@@ -36,7 +36,7 @@ following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz.domain;
@@ -50,7 +50,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz.domain
@@ -84,7 +84,7 @@ can do so directly in the annotation, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz.domain;
@@ -98,7 +98,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz.domain
@@ -153,14 +153,14 @@ available for use in the body of the constructors, you need to define this on th
======
Java::
+
[source,java,indent=0,subs="verbatim"]
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Configurable(preConstruction = true)
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Configurable(preConstruction = true)
----
@@ -389,7 +389,7 @@ 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
{petclinic-github-org}/spring-framework-petclinic[Petclinic sample application based on Spring Framework].
{spring-github-org}/spring-petclinic[Petclinic sample application].
[[aop-aj-ltw-first-example]]
@@ -413,7 +413,7 @@ It is a time-based profiler that uses the @AspectJ-style of aspect declaration:
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz;
@@ -446,7 +446,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
@@ -544,7 +544,7 @@ driver class with a `main(..)` method to demonstrate the LTW in action:
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz;
@@ -566,7 +566,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
@@ -625,7 +625,7 @@ result:
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz;
@@ -647,7 +647,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
+23 -134
View File
@@ -36,7 +36,7 @@ NOTE: At the moment, AOT is focused on allowing Spring applications to be deploy
We intend to support more JVM-based use cases in future generations.
[[aot.basics]]
== AOT Engine Overview
== 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`]:
@@ -140,7 +140,7 @@ Taking our previous example, let's assume that `DataSourceConfiguration` is as f
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration(proxyBeanMethods = false)
public class DataSourceConfiguration {
@@ -155,7 +155,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration(proxyBeanMethods = false)
class DataSourceConfiguration {
@@ -176,7 +176,7 @@ The AOT engine will convert the configuration class above to code similar to the
======
Java::
+
[source,java,indent=0]
[source,java,indent=0,role="primary"]
----
/**
* Bean definitions for {@link DataSourceConfiguration}
@@ -225,7 +225,7 @@ 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
== 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
@@ -244,7 +244,7 @@ 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
== 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
@@ -266,7 +266,7 @@ notion of a classpath. For cases like this, it is crucial that the scanning happ
build time.
[[aot.bestpractices.bean-type]]
=== Expose the Most Precise 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.
@@ -278,7 +278,7 @@ Consider the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration(proxyBeanMethods = false)
public class UserConfiguration {
@@ -290,19 +290,6 @@ Java::
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
@Configuration(proxyBeanMethods = false)
class UserConfiguration {
@Bean
fun myInterface(): MyInterface = MyImplementation()
}
----
======
In the example above, the declared type for the `myInterface` bean is `MyInterface`.
@@ -315,7 +302,7 @@ The example above should be rewritten as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration(proxyBeanMethods = false)
public class UserConfiguration {
@@ -327,19 +314,6 @@ Java::
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
@Configuration(proxyBeanMethods = false)
class UserConfiguration {
@Bean
fun myInterface() = MyImplementation()
}
----
======
If you are registering bean definitions programmatically, consider using `RootBeanBefinition` as it allows to specify a `ResolvableType` that handles generics.
@@ -352,21 +326,21 @@ However, this is not a best practice and flagging the preferred constructor with
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.complex-data-structures]]
=== Avoid Complex Data Structures for Constructor Parameters and Properties
[[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 structures, decomposing to simple types or referring to a bean that is built as such is recommended.
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 Beans with 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:
@@ -378,20 +352,6 @@ For instance, autowiring on fields and methods will be skipped as they are handl
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.circular-dependencies]]
=== Avoid Circular Dependencies
Certain use cases can result in circular dependencies between one or more beans. With the
regular runtime, it may be possible to wire those circular dependencies via `@Autowired`
on setter methods or fields. However, an AOT-optimized context will fail to start with
explicit circular dependencies.
In an AOT-optimized application, you should therefore strive to avoid circular
dependencies. If that is not possible, you can use `@Lazy` injection points or
`ObjectProvider` to lazily access or retrieve the necessary collaborating beans. See
xref:core/beans/classpath-scanning.adoc#beans-factorybeans-annotations-lazy-injection-points[this tip]
for further information.
[[aot.bestpractices.factory-bean]]
=== FactoryBean
@@ -405,21 +365,12 @@ Consider the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ClientFactoryBean<T extends AbstractClient> implements FactoryBean<T> {
// ...
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
class ClientFactoryBean<T : AbstractClient> : FactoryBean<T> {
// ...
}
----
======
A concrete client declaration should provide a resolved generic for the client, as shown in the following example:
@@ -428,7 +379,7 @@ A concrete client declaration should provide a resolved generic for the client,
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration(proxyBeanMethods = false)
public class UserConfiguration {
@@ -440,19 +391,6 @@ Java::
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
@Configuration(proxyBeanMethods = false)
class UserConfiguration {
@Bean
fun myClient() = ClientFactoryBean<MyClient>(...)
}
----
======
If the `FactoryBean` bean definition is registered programmatically, make sure to follow these steps:
@@ -467,22 +405,12 @@ The following example showcases a basic definition:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
RootBeanDefinition beanDefinition = new RootBeanDefinition(ClientFactoryBean.class);
beanDefinition.setTargetType(ResolvableType.forClassWithGenerics(ClientFactoryBean.class, MyClient.class));
// ...
registry.registerBeanDefinition("myClient", beanDefinition);
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
val beanDefinition = RootBeanDefinition(ClientFactoryBean::class.java)
beanDefinition.setTargetType(ResolvableType.forClassWithGenerics(ClientFactoryBean::class.java, MyClient::class.java));
// ...
registry.registerBeanDefinition("myClient", beanDefinition)
RootBeanDefinition beanDefinition = new RootBeanDefinition(ClientFactoryBean.class);
beanDefinition.setTargetType(ResolvableType.forClassWithGenerics(ClientFactoryBean.class, MyClient.class));
// ...
registry.registerBeanDefinition("myClient", beanDefinition);
----
======
@@ -495,7 +423,7 @@ The JPA persistence unit has to be known upfront for certain optimizations to ap
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Bean
LocalContainerEntityManagerFactoryBean customDBEntityManagerFactory(DataSource dataSource) {
@@ -505,19 +433,6 @@ Java::
return factoryBean;
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
@Bean
fun customDBEntityManagerFactory(dataSource: DataSource): LocalContainerEntityManagerFactoryBean {
val factoryBean = LocalContainerEntityManagerFactoryBean()
factoryBean.dataSource = dataSource
factoryBean.setPackagesToScan("com.example.app")
return factoryBean
}
----
======
To make sure the scanning occurs ahead of time, a `PersistenceManagedTypes` bean must be declared and used by the
@@ -527,7 +442,7 @@ factory bean definition, as shown by the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Bean
PersistenceManagedTypes persistenceManagedTypes(ResourceLoader resourceLoader) {
@@ -543,25 +458,6 @@ Java::
return factoryBean;
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
@Bean
fun persistenceManagedTypes(resourceLoader: ResourceLoader): PersistenceManagedTypes {
return PersistenceManagedTypesScanner(resourceLoader)
.scan("com.example.app")
}
@Bean
fun customDBEntityManagerFactory(dataSource: DataSource, managedTypes: PersistenceManagedTypes): LocalContainerEntityManagerFactoryBean {
val factoryBean = LocalContainerEntityManagerFactoryBean()
factoryBean.dataSource = dataSource
factoryBean.setManagedTypes(managedTypes)
return factoryBean
}
----
======
[[aot.hints]]
@@ -579,17 +475,10 @@ The following example makes sure that `config/app.properties` can be loaded from
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
runtimeHints.resources().registerPattern("config/app.properties");
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
runtimeHints.resources().registerPattern("config/app.properties")
----
======
A number of contracts are handled automatically during AOT processing.
@@ -145,7 +145,7 @@ use the `NamespaceHandlerSupport` class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package org.springframework.samples.xml;
@@ -161,7 +161,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package org.springframework.samples.xml
@@ -202,7 +202,7 @@ we can parse our custom XML content, as you can see in the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package org.springframework.samples.xml;
@@ -240,7 +240,7 @@ single `BeanDefinition` represents.
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package org.springframework.samples.xml
@@ -416,7 +416,7 @@ The following listing shows the `Component` class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package com.foo;
@@ -449,7 +449,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package com.foo
@@ -480,7 +480,7 @@ setter property for the `components` property. The following listing shows such
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package com.foo;
@@ -522,7 +522,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package com.foo
@@ -598,7 +598,7 @@ we then create a custom `NamespaceHandler`:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package com.foo;
@@ -614,7 +614,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package com.foo
@@ -637,7 +637,7 @@ listing shows our custom `BeanDefinitionParser` implementation:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package com.foo;
@@ -688,7 +688,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package com.foo
@@ -787,7 +787,7 @@ JCache-initializing `BeanDefinition`. The following listing shows our `JCacheIni
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package com.foo;
@@ -807,7 +807,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package com.foo
@@ -843,7 +843,7 @@ Next, we need to create the associated `NamespaceHandler`, as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package com.foo;
@@ -861,7 +861,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package com.foo
@@ -886,7 +886,7 @@ The following listing shows our `BeanDefinitionDecorator` implementation:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package com.foo;
@@ -942,7 +942,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package com.foo
@@ -121,7 +121,7 @@ The following example enumeration shows how easy injecting an enum value is:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package jakarta.persistence;
@@ -134,7 +134,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package jakarta.persistence
@@ -152,7 +152,7 @@ Now consider the following setter of type `PersistenceContextType` and the corre
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package example;
@@ -168,7 +168,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package example
@@ -20,7 +20,7 @@ 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 (for example, XML-specified bean properties) effectively overrides the annotations
configuration (e.g. XML-specified bean properties) effectively overrides the annotations
for properties when wired through mixed approaches.
====
@@ -15,7 +15,7 @@ primary `MovieCatalog`:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class MovieConfiguration {
@@ -33,7 +33,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class MovieConfiguration {
@@ -58,7 +58,7 @@ bean is left, it is effectively primary as well:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class MovieConfiguration {
@@ -76,7 +76,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class MovieConfiguration {
@@ -100,7 +100,7 @@ With both variants of the preceding configuration, the following
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -113,7 +113,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -14,7 +14,7 @@ this can be a plain descriptive value, as shown in the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -28,7 +28,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -50,7 +50,7 @@ method parameters, as shown in the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -71,7 +71,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -179,10 +179,27 @@ is preserved in `@Bean` return type signatures or collection inheritance hierarc
In this case, you can use qualifier values to select among same-typed collections,
as outlined in the previous paragraph.
`@Autowired` also considers self references for injection (that is, references back to
the bean that is currently injected). See
xref:core/beans/annotation-config/autowired.adoc#beans-autowired-annotation-self-injection[Self Injection]
for details.
`@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.
Regular dependencies on other components always have precedence. In that sense, self
references do not participate in regular candidate selection and are therefore in
particular never primary. On the contrary, they always end up as lowest precedence.
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.
Alternatively, you can use `@Resource`, which may obtain a proxy back to the current bean
by its unique name.
[NOTE]
====
Trying to inject the results from `@Bean` methods on the same configuration class is
effectively a self-reference scenario as well. Either lazily resolve such references
in the method signature where it is actually needed (as opposed to an autowired field
in the configuration class) or declare the affected `@Bean` methods as `static`,
decoupling them from the containing configuration class instance and its lifecycle.
Otherwise, such beans are only considered in the fallback phase, with matching beans
on other configuration classes selected as primary candidates instead (if available).
====
`@Autowired` applies to fields, constructors, and multi-argument methods, allowing for
narrowing through qualifier annotations at the parameter level. In contrast, `@Resource`
@@ -198,7 +215,7 @@ provide the `@Qualifier` annotation within your definition, as the following exa
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Target({ElementType.FIELD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@@ -211,7 +228,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Target(AnnotationTarget.FIELD, AnnotationTarget.VALUE_PARAMETER)
@Retention(AnnotationRetention.RUNTIME)
@@ -229,7 +246,7 @@ following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -250,7 +267,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -322,7 +339,7 @@ the simple annotation, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Target({ElementType.FIELD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@@ -333,7 +350,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Target(AnnotationTarget.FIELD, AnnotationTarget.VALUE_PARAMETER)
@Retention(AnnotationRetention.RUNTIME)
@@ -351,7 +368,7 @@ following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -366,7 +383,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -406,7 +423,7 @@ consider the following annotation definition:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Target({ElementType.FIELD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@@ -421,7 +438,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Target(AnnotationTarget.FIELD, AnnotationTarget.VALUE_PARAMETER)
@Retention(AnnotationRetention.RUNTIME)
@@ -438,7 +455,7 @@ In this case `Format` is an enum, defined as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public enum Format {
VHS, DVD, BLURAY
@@ -447,7 +464,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
enum class Format {
VHS, DVD, BLURAY
@@ -464,7 +481,7 @@ for both attributes: `genre` and `format`, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -490,7 +507,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -13,7 +13,7 @@ You can apply the `@Autowired` annotation to constructors, as the following exam
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -30,7 +30,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender @Autowired constructor(
private val customerPreferenceDao: CustomerPreferenceDao)
@@ -54,7 +54,7 @@ as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -71,7 +71,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -91,7 +91,7 @@ arguments, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -112,7 +112,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -139,7 +139,7 @@ following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -159,7 +159,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender @Autowired constructor(
private val customerPreferenceDao: CustomerPreferenceDao) {
@@ -186,37 +186,14 @@ 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).
====
.[[beans-autowired-annotation-self-injection]]Self Injection
****
`@Autowired` also considers self references for injection (that is, references back to
the bean that is currently injected).
Note, however, that self injection is a fallback mechanism. Regular dependencies on other
components always have precedence. In that sense, self references do not participate in
regular autowiring candidate selection and are therefore in particular never primary. On
the contrary, they always end up as lowest precedence.
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. As an
alternative, consider factoring out the affected methods to a separate delegate bean in
such a scenario.
Another alternative is to use `@Resource`, which may obtain a proxy back to the current
bean by its unique name.
======
[NOTE]
====
Trying to inject the results from `@Bean` methods in the same `@Configuration` class is
effectively a self-reference scenario as well. Either lazily resolve such references
in the method signature where it is actually needed (as opposed to an autowired field
in the configuration class) or declare the affected `@Bean` methods as `static`,
decoupling them from the containing configuration class instance and its lifecycle.
Otherwise, such beans are only considered in the fallback phase, with matching beans
on other configuration classes selected as primary candidates instead (if available).
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
@@ -226,7 +203,7 @@ expects an array of that type, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -239,7 +216,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -257,7 +234,7 @@ The same applies for typed collections, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -274,7 +251,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -319,7 +296,7 @@ corresponding bean names, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -336,7 +313,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -361,7 +338,7 @@ non-required (i.e., by setting the `required` attribute in `@Autowired` to `fals
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -378,7 +355,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -444,15 +421,15 @@ through Java 8's `java.util.Optional`, as the following example shows:
}
----
You can also use a parameter-level `@Nullable` annotation (of any kind in any package --
for example, `javax.annotation.Nullable` from JSR-305) or just leverage Kotlin built-in
null-safety support:
You can also use a `@Nullable` annotation (of any kind in any package -- for example,
`javax.annotation.Nullable` from JSR-305) or just leverage Kotlin built-in null-safety
support:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -465,7 +442,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -477,13 +454,6 @@ Kotlin::
----
======
[NOTE]
====
A type-level `@Nullable` annotation such as from JSpecify is not supported in Spring
Framework 6.2 yet. You need to upgrade to Spring Framework 7.0 where the framework
detects type-level annotations and consistently declares JSpecify in its own codebase.
====
You can also use `@Autowired` for interfaces that are well-known resolvable
dependencies: `BeanFactory`, `ApplicationContext`, `Environment`, `ResourceLoader`,
`ApplicationEventPublisher`, and `MessageSource`. These interfaces and their extended
@@ -495,7 +465,7 @@ an `ApplicationContext` object:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -511,7 +481,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -9,7 +9,7 @@ configuration:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class MyConfiguration {
@@ -28,7 +28,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class MyConfiguration {
@@ -50,7 +50,7 @@ used as a qualifier, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Autowired
private Store<String> s1; // <String> qualifier, injects the stringStore bean
@@ -61,7 +61,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Autowired
private lateinit var s1: Store<String> // <String> qualifier, injects the stringStore bean
@@ -78,7 +78,7 @@ following example autowires a generic `List`:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// Inject all Store beans as long as they have an <Integer> generic
// Store<String> beans will not appear in this list
@@ -88,7 +88,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// Inject all Store beans as long as they have an <Integer> generic
// Store<String> beans will not appear in this list
@@ -17,7 +17,7 @@ cleared upon destruction:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class CachingMovieLister {
@@ -35,7 +35,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class CachingMovieLister {
@@ -15,7 +15,7 @@ as demonstrated in the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -31,7 +31,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -54,7 +54,7 @@ named `movieFinder` injected into its setter method:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -69,7 +69,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -103,7 +103,7 @@ named "customerPreferenceDao" and then falls back to a primary type match for th
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -124,7 +124,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -7,22 +7,22 @@
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class MovieRecommender {
@Component
public class MovieRecommender {
private final String catalog;
private final String catalog;
public MovieRecommender(@Value("${catalog.name}") String catalog) {
this.catalog = catalog;
}
}
public MovieRecommender(@Value("${catalog.name}") String catalog) {
this.catalog = catalog;
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class MovieRecommender(@Value("\${catalog.name}") private val catalog: String)
@@ -35,16 +35,16 @@ With the following configuration:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@PropertySource("classpath:application.properties")
public class AppConfig { }
@Configuration
@PropertySource("classpath:application.properties")
public class AppConfig { }
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@PropertySource("classpath:application.properties")
@@ -56,7 +56,7 @@ And the following `application.properties` file:
[source,java,indent=0,subs="verbatim,quotes"]
----
catalog.name=MovieCatalog
catalog.name=MovieCatalog
----
In that case, the `catalog` parameter and field will be equal to the `MovieCatalog` value.
@@ -71,7 +71,7 @@ example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -85,7 +85,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -117,22 +117,22 @@ It is possible to provide a default value as following:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class MovieRecommender {
@Component
public class MovieRecommender {
private final String catalog;
private final String catalog;
public MovieRecommender(@Value("${catalog.name:defaultCatalog}") String catalog) {
this.catalog = catalog;
}
}
public MovieRecommender(@Value("${catalog.name:defaultCatalog}") String catalog) {
this.catalog = catalog;
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class MovieRecommender(@Value("\${catalog.name:defaultCatalog}") private val catalog: String)
@@ -148,23 +148,23 @@ provide conversion support for your own custom type, you can provide your own
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@Configuration
public class AppConfig {
@Bean
public ConversionService conversionService() {
DefaultFormattingConversionService conversionService = new DefaultFormattingConversionService();
conversionService.addConverter(new MyCustomConverter());
return conversionService;
}
}
@Bean
public ConversionService conversionService() {
DefaultFormattingConversionService conversionService = new DefaultFormattingConversionService();
conversionService.addConverter(new MyCustomConverter());
return conversionService;
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -186,22 +186,22 @@ computed at runtime as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class MovieRecommender {
@Component
public class MovieRecommender {
private final String catalog;
private final String catalog;
public MovieRecommender(@Value("#{systemProperties['user.catalog'] + 'Catalog' }") String catalog) {
this.catalog = catalog;
}
}
public MovieRecommender(@Value("#{systemProperties['user.catalog'] + 'Catalog' }") String catalog) {
this.catalog = catalog;
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class MovieRecommender(
@@ -215,23 +215,23 @@ SpEL also enables the use of more complex data structures:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class MovieRecommender {
@Component
public class MovieRecommender {
private final Map<String, Integer> countOfMoviesPerCatalog;
private final Map<String, Integer> countOfMoviesPerCatalog;
public MovieRecommender(
@Value("#{{'Thriller': 100, 'Comedy': 300}}") Map<String, Integer> countOfMoviesPerCatalog) {
this.countOfMoviesPerCatalog = countOfMoviesPerCatalog;
}
}
public MovieRecommender(
@Value("#{{'Thriller': 100, 'Comedy': 300}}") Map<String, Integer> countOfMoviesPerCatalog) {
this.countOfMoviesPerCatalog = countOfMoviesPerCatalog;
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class MovieRecommender(
@@ -110,16 +110,16 @@ as the local file system, the Java `CLASSPATH`, and so on.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ApplicationContext context = new ClassPathXmlApplicationContext("services.xml", "daos.xml");
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val context = ClassPathXmlApplicationContext("services.xml", "daos.xml")
val context = ClassPathXmlApplicationContext("services.xml", "daos.xml")
----
======
@@ -294,7 +294,7 @@ example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// create and configure beans
ApplicationContext context = new ClassPathXmlApplicationContext("services.xml", "daos.xml");
@@ -308,18 +308,18 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
import org.springframework.beans.factory.getBean
// create and configure beans
val context = ClassPathXmlApplicationContext("services.xml", "daos.xml")
val context = ClassPathXmlApplicationContext("services.xml", "daos.xml")
// retrieve configured instance
val service = context.getBean<PetStoreService>("petStore")
// retrieve configured instance
val service = context.getBean<PetStoreService>("petStore")
// use configured instance
var userList = service.getUsernameList()
// use configured instance
var userList = service.getUsernameList()
----
======
@@ -331,14 +331,14 @@ The following example shows Groovy configuration:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ApplicationContext context = new GenericGroovyApplicationContext("services.groovy", "daos.groovy");
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val context = GenericGroovyApplicationContext("services.groovy", "daos.groovy")
----
@@ -352,7 +352,7 @@ example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
GenericApplicationContext context = new GenericApplicationContext();
new XmlBeanDefinitionReader(context).loadBeanDefinitions("services.xml", "daos.xml");
@@ -361,7 +361,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val context = GenericApplicationContext()
XmlBeanDefinitionReader(context).loadBeanDefinitions("services.xml", "daos.xml")
@@ -376,7 +376,7 @@ example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
GenericApplicationContext context = new GenericApplicationContext();
new GroovyBeanDefinitionReader(context).loadBeanDefinitions("services.groovy", "daos.groovy");
@@ -385,7 +385,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val context = GenericApplicationContext()
GroovyBeanDefinitionReader(context).loadBeanDefinitions("services.groovy", "daos.groovy")
@@ -90,7 +90,7 @@ you need to programmatically call `addBeanPostProcessor`, as the following examp
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
// populate the factory with bean definitions
@@ -104,7 +104,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val factory = DefaultListableBeanFactory()
// populate the factory with bean definitions
@@ -124,7 +124,7 @@ you need to call its `postProcessBeanFactory` method, as the following example s
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(factory);
@@ -140,7 +140,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val factory = DefaultListableBeanFactory()
val reader = XmlBeanDefinitionReader(factory)
@@ -59,7 +59,7 @@ is meta-annotated with `@Component`, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@@ -74,7 +74,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Target(AnnotationTarget.TYPE)
@Retention(AnnotationRetention.RUNTIME)
@@ -103,7 +103,7 @@ customization of the `proxyMode`. The following listing shows the definition of
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@@ -123,7 +123,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Target(AnnotationTarget.TYPE, AnnotationTarget.FUNCTION)
@Retention(AnnotationRetention.RUNTIME)
@@ -142,7 +142,7 @@ You can then use `@SessionScope` without declaring the `proxyMode` as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Service
@SessionScope
@@ -153,7 +153,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Service
@SessionScope
@@ -169,7 +169,7 @@ You can also override the value for the `proxyMode`, as the following example sh
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Service
@SessionScope(proxyMode = ScopedProxyMode.INTERFACES)
@@ -180,7 +180,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Service
@SessionScope(proxyMode = ScopedProxyMode.INTERFACES)
@@ -207,7 +207,7 @@ are eligible for such autodetection:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Service
public class SimpleMovieLister {
@@ -222,7 +222,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Service
class SimpleMovieLister(private val movieFinder: MovieFinder)
@@ -233,7 +233,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Repository
public class JpaMovieFinder implements MovieFinder {
@@ -243,7 +243,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Repository
class JpaMovieFinder : MovieFinder {
@@ -262,7 +262,7 @@ comma- or semicolon- or space-separated list that includes the parent package of
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ComponentScan(basePackages = "org.example")
@@ -273,7 +273,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ComponentScan(basePackages = ["org.example"])
@@ -317,8 +317,8 @@ exposed based on security policies in some environments -- for example, standalo
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).
On the module path (Java Module System), Spring's classpath scanning generally works as
expected. However, make sure that your component classes are exported in your `module-info`
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`
descriptors. If you expect Spring to invoke non-public members of your classes, make
sure that they are 'opened' (that is, that they use an `opens` declaration instead of an
`exports` declaration in your `module-info` descriptor).
@@ -380,7 +380,7 @@ and using "`stub`" repositories instead:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ComponentScan(basePackages = "org.example",
@@ -393,7 +393,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ComponentScan(basePackages = ["org.example"],
@@ -438,7 +438,7 @@ annotated classes. The following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class FactoryMethodComponent {
@@ -457,7 +457,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class FactoryMethodComponent {
@@ -480,15 +480,11 @@ factory method and other bean definition properties, such as a qualifier value t
the `@Qualifier` annotation. Other method-level annotations that can be specified are
`@Scope`, `@Lazy`, and custom qualifier annotations.
[[beans-factorybeans-annotations-lazy-injection-points]]
[TIP]
====
In addition to its role for component initialization, you can also place the `@Lazy`
TIP: In addition to its role for component initialization, you can also place the `@Lazy`
annotation on injection points marked with `@Autowired` or `@Inject`. In this context,
it leads to the injection of a lazy-resolution proxy. However, such a proxy approach
is rather limited. For sophisticated lazy interactions, in particular in combination
with optional dependencies, we recommend `ObjectProvider<MyTargetBean>` instead.
====
Autowired fields and methods are supported, as previously discussed, with additional
support for autowiring of `@Bean` methods. The following example shows how to do so:
@@ -497,7 +493,7 @@ support for autowiring of `@Bean` methods. The following example shows how to do
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class FactoryMethodComponent {
@@ -536,7 +532,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class FactoryMethodComponent {
@@ -589,7 +585,7 @@ The following example shows how to use `InjectionPoint`:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class FactoryMethodComponent {
@@ -603,7 +599,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class FactoryMethodComponent {
@@ -703,7 +699,7 @@ following component classes were detected, the names would be `myMovieLister` an
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Service("myMovieLister")
public class SimpleMovieLister {
@@ -713,7 +709,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Service("myMovieLister")
class SimpleMovieLister {
@@ -726,7 +722,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Repository
public class MovieFinderImpl implements MovieFinder {
@@ -736,7 +732,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Repository
class MovieFinderImpl : MovieFinder {
@@ -763,7 +759,7 @@ fully qualified class name for the generated bean name. The
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ComponentScan(basePackages = "org.example", nameGenerator = MyNameGenerator.class)
@@ -774,7 +770,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ComponentScan(basePackages = ["org.example"], nameGenerator = MyNameGenerator::class)
@@ -810,7 +806,7 @@ scope within the annotation, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Scope("prototype")
@Repository
@@ -821,7 +817,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Scope("prototype")
@Repository
@@ -853,7 +849,7 @@ an annotation and a bean definition shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ComponentScan(basePackages = "org.example", scopeResolver = MyScopeResolver.class)
@@ -864,7 +860,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ComponentScan(basePackages = ["org.example"], scopeResolver = MyScopeResolver::class)
@@ -891,7 +887,7 @@ the following configuration results in standard JDK dynamic proxies:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ComponentScan(basePackages = "org.example", scopedProxy = ScopedProxyMode.INTERFACES)
@@ -902,7 +898,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ComponentScan(basePackages = ["org.example"], scopedProxy = ScopedProxyMode.INTERFACES)
@@ -924,8 +920,7 @@ Kotlin::
[[beans-scanning-qualifiers]]
== Providing Qualifier Metadata with Annotations
The `@Qualifier` annotation is discussed in
xref:core/beans/annotation-config/autowired-qualifiers.adoc[Fine-tuning Annotation-based Autowiring with Qualifiers].
The `@Qualifier` annotation is discussed in xref:core/beans/annotation-config/autowired-qualifiers.adoc[Fine-tuning Annotation-based Autowiring with Qualifiers].
The examples in that section demonstrate the use of the `@Qualifier` annotation and
custom qualifier annotations to provide fine-grained control when you resolve autowire
candidates. Because those examples were based on XML bean definitions, the qualifier
@@ -939,7 +934,7 @@ technique:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
@Qualifier("Action")
@@ -950,7 +945,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
@Qualifier("Action")
@@ -962,7 +957,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
@Genre("Action")
@@ -973,7 +968,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
@Genre("Action")
@@ -987,7 +982,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
@Offline
@@ -998,7 +993,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
@Offline
@@ -1,7 +1,7 @@
[[context-introduction]]
= Additional Capabilities of the `ApplicationContext`
As discussed in the xref:core/beans/introduction.adoc[chapter introduction], the `org.springframework.beans.factory`
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`]
@@ -102,7 +102,7 @@ implementations and so can be cast to the `MessageSource` interface.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
MessageSource resources = new ClassPathXmlApplicationContext("beans.xml");
@@ -113,7 +113,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun main() {
val resources = ClassPathXmlApplicationContext("beans.xml")
@@ -161,7 +161,7 @@ converted into `String` objects and inserted into placeholders in the lookup mes
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class Example {
@@ -181,7 +181,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class Example {
@@ -224,7 +224,7 @@ argument.required=Ebagum lad, the ''{0}'' argument is required, I say, required.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(final String[] args) {
MessageSource resources = new ClassPathXmlApplicationContext("beans.xml");
@@ -236,7 +236,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun main() {
val resources = ClassPathXmlApplicationContext("beans.xml")
@@ -344,7 +344,7 @@ simple class that extends Spring's `ApplicationEvent` base class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class BlockedListEvent extends ApplicationEvent {
@@ -363,7 +363,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class BlockedListEvent(source: Any,
val address: String,
@@ -380,7 +380,7 @@ example shows such a class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class EmailService implements ApplicationEventPublisherAware {
@@ -407,7 +407,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class EmailService : ApplicationEventPublisherAware {
@@ -447,7 +447,7 @@ shows such a class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class BlockedListNotifier implements ApplicationListener<BlockedListEvent> {
@@ -465,7 +465,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class BlockedListNotifier : ApplicationListener<BlockedListEvent> {
@@ -484,7 +484,7 @@ You can register as many event listeners as you wish, but note that, by default,
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, for example, asynchronous event processing by default,
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.
@@ -513,7 +513,7 @@ the classes above:
<property name="notificationAddress" value="blockedlist@example.org"/>
</bean>
<!-- optional: a custom ApplicationEventMulticaster definition -->
<!-- optional: a custom ApplicationEventMulticaster definition -->
<bean id="applicationEventMulticaster" class="org.springframework.context.event.SimpleApplicationEventMulticaster">
<property name="taskExecutor" ref="..."/>
<property name="errorHandler" ref="..."/>
@@ -545,7 +545,7 @@ You can register an event listener on any method of a managed bean by using the
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class BlockedListNotifier {
@@ -564,7 +564,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class BlockedListNotifier {
@@ -578,8 +578,6 @@ Kotlin::
----
======
NOTE: Do not define such beans to be lazy as the `ApplicationContext` will honour that and will not register the method to listen to events.
The method signature once again declares the event type to which it listens,
but, this time, with a flexible name and without implementing a specific listener interface.
The event type can also be narrowed through generics as long as the actual event type
@@ -593,7 +591,7 @@ following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@EventListener({ContextStartedEvent.class, ContextRefreshedEvent.class})
public void handleContextStart() {
@@ -603,7 +601,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener(ContextStartedEvent::class, ContextRefreshedEvent::class)
fun handleContextStart() {
@@ -623,7 +621,7 @@ The following example shows how our notifier can be rewritten to be invoked only
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@EventListener(condition = "#blEvent.content == 'my-event'")
public void processBlockedListEvent(BlockedListEvent blEvent) {
@@ -633,7 +631,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener(condition = "#blEvent.content == 'my-event'")
fun processBlockedListEvent(blEvent: BlockedListEvent) {
@@ -646,7 +644,7 @@ Each `SpEL` expression evaluates against a dedicated context. The following tabl
items made available to the context so that you can use them for conditional event processing:
[[context-functionality-events-annotation-tbl]]
.Event metadata available in SpEL expressions
.Event SpEL available metadata
|===
| Name| Location| Description| Example
@@ -662,8 +660,8 @@ items made available to the context so that you can use them for conditional eve
| __Argument name__
| evaluation context
| The name of a particular method argument. If the names are not available
(for example, because the code was compiled without the `-parameters` flag), individual
| The name of any of the method arguments. If, for some reason, the names are not available
(for example, because there is no debug information in the compiled byte code), individual
arguments are also available using the `#a<#arg>` syntax where `<#arg>` stands for the
argument index (starting from 0).
| `#blEvent` or `#a0` (you can also use `#p0` or `#p<#arg>` parameter notation as an alias)
@@ -679,7 +677,7 @@ method signature to return the event that should be published, as the following
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@EventListener
public ListUpdateEvent handleBlockedListEvent(BlockedListEvent event) {
@@ -690,7 +688,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener
fun handleBlockedListEvent(event: BlockedListEvent): ListUpdateEvent {
@@ -719,7 +717,7 @@ The following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@EventListener
@Async
@@ -730,7 +728,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener
@Async
@@ -765,7 +763,7 @@ annotation to the method declaration, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@EventListener
@Order(42)
@@ -776,7 +774,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener
@Order(42)
@@ -799,7 +797,7 @@ can create the following listener definition to receive only `EntityCreatedEvent
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@EventListener
public void onPersonCreated(EntityCreatedEvent<Person> event) {
@@ -809,7 +807,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener
fun onPersonCreated(event: EntityCreatedEvent<Person>) {
@@ -831,7 +829,7 @@ environment provides. The following event shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class EntityCreatedEvent<T> extends ApplicationEvent implements ResolvableTypeProvider {
@@ -848,7 +846,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class EntityCreatedEvent<T>(entity: T) : ApplicationEvent(entity), ResolvableTypeProvider {
@@ -866,7 +864,7 @@ Finally, as with classic `ApplicationListener` implementations, the actual multi
happens via a context-wide `ApplicationEventMulticaster` at runtime. By default, this is a
`SimpleApplicationEventMulticaster` with synchronous event publication in the caller thread.
This can be replaced/customized through an "applicationEventMulticaster" bean definition,
for example, for processing all events asynchronously and/or for handling listener exceptions:
e.g. for processing all events asynchronously and/or for handling listener exceptions:
[source,java,indent=0,subs="verbatim,quotes"]
----
@@ -885,12 +883,11 @@ for example, for processing all events asynchronously and/or for handling listen
== Convenient Access to Low-level Resources
For optimal usage and understanding of application contexts, you should familiarize
yourself with Spring's `Resource` abstraction, as described in
xref:core/resources.adoc[Resources].
yourself with Spring's `Resource` abstraction, as described in xref:web/webflux-webclient/client-builder.adoc#webflux-client-builder-reactor-resources[Resources].
An application context is a `ResourceLoader`, which can be used to load `Resource` objects.
A `Resource` is essentially a more feature rich version of the JDK `java.net.URL` class.
In fact, implementations of `Resource` wrap an instance of `java.net.URL`, where
In fact, the implementations of the `Resource` wrap an instance of `java.net.URL`, where
appropriate. A `Resource` can obtain low-level resources from almost any location in a
transparent fashion, including from the classpath, a filesystem location, anywhere
describable with a standard URL, and some other variations. If the resource location
@@ -938,7 +935,7 @@ Here is an example of instrumentation in the `AnnotationConfigApplicationContext
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// create a startup step and start recording
StartupStep scanPackages = getApplicationStartup().start("spring.context.base-packages.scan");
@@ -952,7 +949,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// create a startup step and start recording
val scanPackages = getApplicationStartup().start("spring.context.base-packages.scan")
@@ -11,7 +11,7 @@ To enable load-time weaving, you can add the `@EnableLoadTimeWeaving` to one of
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@EnableLoadTimeWeaving
@@ -21,7 +21,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@EnableLoadTimeWeaving
@@ -57,9 +57,9 @@ The following table describes these properties:
In addition to bean definitions that contain information on how to create a specific
bean, the `ApplicationContext` implementations also permit the registration of existing
objects that are created outside the container (by users). This is done by accessing the
ApplicationContext's `BeanFactory` through the `getAutowireCapableBeanFactory()` method,
which returns the `DefaultListableBeanFactory` implementation. `DefaultListableBeanFactory`
supports this registration through the `registerSingleton(..)` and `registerBeanDefinition(..)`
ApplicationContext's `BeanFactory` through the `getBeanFactory()` method, which returns
the `DefaultListableBeanFactory` implementation. `DefaultListableBeanFactory` supports
this registration through the `registerSingleton(..)` and `registerBeanDefinition(..)`
methods. However, typical applications work solely with beans defined through regular
bean definition metadata.
@@ -298,7 +298,7 @@ The following example shows a class that would work with the preceding bean defi
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ClientService {
private static ClientService clientService = new ClientService();
@@ -312,7 +312,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ClientService private constructor() {
companion object {
@@ -378,7 +378,7 @@ The following example shows the corresponding class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class DefaultServiceLocator {
@@ -392,7 +392,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class DefaultServiceLocator {
companion object {
@@ -428,7 +428,7 @@ The following example shows the corresponding class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class DefaultServiceLocator {
@@ -448,7 +448,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class DefaultServiceLocator {
companion object {
@@ -60,7 +60,6 @@ instance's values consist of all bean instances that match the expected type, an
`Map` instance's keys contain the corresponding bean names.
[[beans-autowired-exceptions]]
== Limitations and Disadvantages of Autowiring
@@ -102,10 +101,10 @@ In the latter scenario, you have several options:
== Excluding a Bean from Autowiring
On a per-bean basis, you can exclude a bean from autowiring. In Spring's XML format, set
the `autowire-candidate` attribute of the `<bean/>` element to `false`; with the `@Bean`
annotation, the attribute is named `autowireCandidate`. The container makes that specific
bean definition unavailable to the autowiring infrastructure, including annotation-based
injection points such as xref:core/beans/annotation-config/autowired.adoc[`@Autowired`].
the `autowire-candidate` attribute of the `<bean/>` element to `false`. The container
makes that specific bean definition unavailable to the autowiring infrastructure
(including annotation style configurations such as xref:core/beans/annotation-config/autowired.adoc[`@Autowired`]
).
NOTE: The `autowire-candidate` attribute is designed to only affect type-based autowiring.
It does not affect explicit references by name, which get resolved even if the
@@ -120,25 +119,9 @@ provide multiple patterns, define them in a comma-separated list. An explicit va
`true` or `false` for a bean definition's `autowire-candidate` attribute always takes
precedence. For such beans, the pattern matching rules do not apply.
These techniques are useful for beans that you never want to be injected into other beans
by autowiring. It does not mean that an excluded bean cannot itself be configured by
These techniques are useful for beans that you never want to be injected into other
beans by autowiring. It does not mean that an excluded bean cannot itself be configured by
using autowiring. Rather, the bean itself is not a candidate for autowiring other beans.
[NOTE]
====
As of 6.2, `@Bean` methods support two variants of the autowire candidate flag:
`autowireCandidate` and `defaultCandidate`.
When using xref:core/beans/annotation-config/autowired-qualifiers.adoc[qualifiers],
a bean marked with `defaultCandidate=false` is only available for injection points
where an additional qualifier indication is present. This is useful for restricted
delegates that are supposed to be injectable in certain areas but are not meant to
get in the way of beans of the same type in other places. Such a bean will never
get injected by plain declared type only, rather by type plus specific qualifier.
In contrast, `autowireCandidate=false` behaves exactly like the `autowire-candidate`
attribute as explained above: Such a bean will never get injected by type at all.
====
@@ -34,7 +34,7 @@ injection:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -52,7 +52,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// a constructor so that the Spring container can inject a MovieFinder
class SimpleMovieLister(private val movieFinder: MovieFinder) {
@@ -77,7 +77,7 @@ being instantiated. Consider the following class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package x.y;
@@ -91,7 +91,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package x.y
@@ -127,7 +127,7 @@ by type without help. Consider the following class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package examples;
@@ -148,7 +148,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package examples
@@ -159,12 +159,10 @@ Kotlin::
----
======
[discrete]
[[beans-factory-ctor-arguments-type]]
==== Constructor argument type matching
.[[beans-factory-ctor-arguments-type]]Constructor argument type matching
--
In the preceding scenario, the container can use type matching with simple types if
you explicitly specify the type of the constructor argument via the `type` attribute,
you explicitly specify the type of the constructor argument by using the `type` attribute,
as the following example shows:
[source,xml,indent=0,subs="verbatim,quotes"]
@@ -174,11 +172,10 @@ as the following example shows:
<constructor-arg type="java.lang.String" value="42"/>
</bean>
----
--
[discrete]
[[beans-factory-ctor-arguments-index]]
==== Constructor argument index
.[[beans-factory-ctor-arguments-index]]Constructor argument index
--
You can use the `index` attribute to specify explicitly the index of constructor arguments,
as the following example shows:
@@ -194,11 +191,10 @@ In addition to resolving the ambiguity of multiple simple values, specifying an
resolves ambiguity where a constructor has two arguments of the same type.
NOTE: The index is 0-based.
--
[discrete]
[[beans-factory-ctor-arguments-name]]
==== Constructor argument name
.[[beans-factory-ctor-arguments-name]]Constructor argument name
--
You can also use the constructor parameter name for value disambiguation, as the following
example shows:
@@ -211,8 +207,8 @@ example shows:
----
Keep in mind that, to make this work out of the box, your code must be compiled with the
`-parameters` flag enabled so that Spring can look up the parameter name from the constructor.
If you cannot or do not want to compile your code with the `-parameters` flag, you can use the
debug flag enabled so that Spring can look up the parameter name from the constructor.
If you cannot or do not want to compile your code with the debug flag, you can use the
https://download.oracle.com/javase/8/docs/api/java/beans/ConstructorProperties.html[@ConstructorProperties]
JDK annotation to explicitly name your constructor arguments. The sample class would
then have to look as follows:
@@ -221,7 +217,7 @@ then have to look as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package examples;
@@ -239,7 +235,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package examples
@@ -248,6 +244,7 @@ Kotlin::
constructor(val years: Int, val ultimateAnswer: String)
----
======
--
[[beans-setter-injection]]
@@ -265,7 +262,7 @@ on container specific interfaces, base classes, or annotations.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -283,7 +280,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -440,7 +437,7 @@ The following example shows the corresponding `ExampleBean` class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ExampleBean {
@@ -466,7 +463,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ExampleBean {
lateinit var beanOne: AnotherBean
@@ -503,7 +500,7 @@ The following example shows the corresponding `ExampleBean` class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ExampleBean {
@@ -524,7 +521,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ExampleBean(
private val beanOne: AnotherBean,
@@ -557,7 +554,7 @@ The following example shows the corresponding `ExampleBean` class:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ExampleBean {
@@ -581,7 +578,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ExampleBean private constructor() {
companion object {
@@ -3,14 +3,13 @@
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 metadata or through xref:core/beans/dependencies/factory-autowire.adoc[autowiring].
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 or `@DependsOn` annotation 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:
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:
[source,xml,indent=0,subs="verbatim,quotes"]
----
@@ -33,10 +32,10 @@ delimiters):
----
NOTE: The `depends-on` attribute can specify both an initialization-time dependency and,
in the case of xref:core/beans/factory-scopes.adoc#beans-factory-scopes-singleton[singleton]
beans only, a corresponding destruction-time dependency. Dependent beans that define a
`depends-on` relationship with a given bean are destroyed first, prior to the given bean
itself being destroyed. Thus, `depends-on` can also control shutdown order.
in the case of xref:core/beans/factory-scopes.adoc#beans-factory-scopes-singleton[singleton] beans only, a corresponding
destruction-time dependency. Dependent beans that define a `depends-on` relationship
with a given bean are destroyed first, prior to the given bean itself being destroyed.
Thus, `depends-on` can also control shutdown order.
@@ -21,7 +21,7 @@ shows this approach:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages",fold="none"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages",fold="none"]
----
package fiona.apple;
@@ -60,7 +60,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages",fold="none"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages",fold="none"]
----
package fiona.apple
@@ -120,6 +120,8 @@ dynamically generate a subclass that overrides the method.
subclasses cannot be `final`, and the method to be overridden cannot be `final`, either.
* Unit-testing a class that has an `abstract` method requires you to subclass the class
yourself and to supply a stub implementation of the `abstract` method.
* Concrete methods are also necessary for component scanning, which requires concrete
classes to pick up.
* A further key limitation is that lookup methods do not work with factory methods and
in particular not with `@Bean` methods in configuration classes, since, in that case,
the container is not in charge of creating the instance and therefore cannot create
@@ -135,7 +137,7 @@ the reworked example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages",fold="none"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages",fold="none"]
----
package fiona.apple;
@@ -158,7 +160,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages",fold="none"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages",fold="none"]
----
package fiona.apple
@@ -218,7 +220,7 @@ method through the `@Lookup` annotation, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public abstract class CommandManager {
@@ -235,7 +237,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
abstract class CommandManager {
@@ -258,7 +260,7 @@ declared return type of the lookup method:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public abstract class CommandManager {
@@ -275,7 +277,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
abstract class CommandManager {
@@ -291,6 +293,11 @@ Kotlin::
----
======
Note that you should typically declare such annotated lookup methods with a concrete
stub implementation, in order for them to be compatible with Spring's component
scanning rules where abstract classes get ignored by default. This limitation does not
apply to explicitly registered or explicitly imported bean classes.
[TIP]
====
Another way of accessing differently scoped target beans is an `ObjectFactory`/
@@ -317,7 +324,7 @@ the following class, which has a method called `computeValue` that we want to ov
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MyValueCalculator {
@@ -331,7 +338,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MyValueCalculator {
@@ -351,7 +358,7 @@ interface provides the new method definition, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
/**
* meant to be used to override the existing computeValue(String)
@@ -370,7 +377,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
/**
* meant to be used to override the existing computeValue(String)
@@ -102,8 +102,8 @@ following snippet:
----
<bean id="theTargetBean" class="..." />
<bean id="theClientBean" class="...">
<property name="targetName" ref="theTargetBean"/>
<bean id="client" class="...">
<property name="targetName" value="theTargetBean"/>
</bean>
----
@@ -168,8 +168,8 @@ listings shows how to use the `parent` attribute:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<!-- in the child (descendant) context, bean name is the same as the parent bean -->
<bean id="accountService"
<!-- in the child (descendant) context -->
<bean id="accountService" <!-- bean name is the same as the parent bean -->
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="target">
<ref parent="accountService"/> <!-- notice how we refer to the parent bean -->
@@ -354,7 +354,7 @@ The following Java class and bean definition show how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SomeClass {
@@ -368,7 +368,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SomeClass {
lateinit var accounts: Map<String, Float>
@@ -418,14 +418,14 @@ The preceding example is equivalent to the following Java code:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
exampleBean.setEmail("");
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
exampleBean.email = ""
----
@@ -449,14 +449,14 @@ The preceding configuration is equivalent to the following Java code:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
exampleBean.setEmail(null);
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
exampleBean.email = null
----
@@ -582,7 +582,7 @@ it needs to be declared in the XML file even though it is not defined in an XSD
(it exists inside the Spring core).
For the rare cases where the constructor argument names are not available (usually if
the bytecode was compiled without the `-parameters` flag), you can fall back to the
the bytecode was compiled without debugging information), you can use fallback to the
argument indexes, as follows:
[source,xml,indent=0,subs="verbatim,quotes"]
@@ -43,7 +43,7 @@ Consider the first use case in a practical application that requires a
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Bean
public DataSource dataSource() {
@@ -57,7 +57,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Bean
fun dataSource(): DataSource {
@@ -79,7 +79,7 @@ now looks like the following listing:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Bean(destroyMethod = "")
public DataSource dataSource() throws Exception {
@@ -90,7 +90,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Bean(destroyMethod = "")
fun dataSource(): DataSource {
@@ -128,7 +128,7 @@ can rewrite the `dataSource` configuration as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@Profile("development")
@@ -147,7 +147,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@Profile("development")
@@ -171,7 +171,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@Profile("production")
@@ -188,7 +188,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@Profile("production")
@@ -233,7 +233,7 @@ of creating a custom composed annotation. The following example defines a custom
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@@ -244,7 +244,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Target(AnnotationTarget.CLASS)
@Retention(AnnotationRetention.RUNTIME)
@@ -272,7 +272,7 @@ the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -300,7 +300,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -454,7 +454,7 @@ it programmatically against the `Environment` API which is available through an
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
ctx.getEnvironment().setActiveProfiles("development");
@@ -464,7 +464,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val ctx = AnnotationConfigApplicationContext().apply {
environment.setActiveProfiles("development")
@@ -491,14 +491,14 @@ activates multiple profiles:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ctx.getEnvironment().setActiveProfiles("profile1", "profile2");
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
ctx.getEnvironment().setActiveProfiles("profile1", "profile2")
----
@@ -523,7 +523,7 @@ the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@Profile("default")
@@ -541,7 +541,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@Profile("default")
@@ -578,7 +578,7 @@ hierarchy of property sources. Consider the following listing:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ApplicationContext ctx = new GenericApplicationContext();
Environment env = ctx.getEnvironment();
@@ -588,7 +588,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val ctx = GenericApplicationContext()
val env = ctx.environment
@@ -643,7 +643,7 @@ current `Environment`. The following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ConfigurableApplicationContext ctx = new GenericApplicationContext();
MutablePropertySources sources = ctx.getEnvironment().getPropertySources();
@@ -652,7 +652,7 @@ sources.addFirst(new MyPropertySource());
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val ctx = GenericApplicationContext()
val sources = ctx.environment.propertySources
@@ -684,7 +684,7 @@ a call to `testBean.getName()` returns `myTestBean`:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@PropertySource("classpath:/com/myco/app.properties")
@@ -704,7 +704,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@PropertySource("classpath:/com/myco/app.properties")
@@ -729,7 +729,7 @@ environment, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@PropertySource("classpath:/com/${my.placeholder:default/path}/app.properties")
@@ -749,7 +749,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@PropertySource("classpath:/com/\${my.placeholder:default/path}/app.properties")
@@ -123,7 +123,7 @@ The following listing shows the custom `BeanPostProcessor` implementation class
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package scripting;
@@ -145,7 +145,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package scripting
@@ -205,7 +205,7 @@ The following Java application runs the preceding code and configuration:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
@@ -224,9 +224,9 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
import org.springframework.beans.factory.getBean
fun main() {
val ctx = ClassPathXmlApplicationContext("scripting/beans.xml")
@@ -72,7 +72,7 @@ no-argument signature. With Java configuration, you can use the `initMethod` att
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ExampleBean {
@@ -84,7 +84,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ExampleBean {
@@ -107,7 +107,7 @@ The preceding example has almost exactly the same effect as the following exampl
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class AnotherExampleBean implements InitializingBean {
@@ -120,7 +120,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class AnotherExampleBean : InitializingBean {
@@ -144,7 +144,7 @@ based on the given configuration but no further activity with external bean acce
Otherwise there is a risk for an initialization deadlock.
For a scenario where expensive post-initialization activity is to be triggered,
for example, asynchronous database preparation steps, your bean should either implement
e.g. asynchronous database preparation steps, your bean should either implement
`SmartInitializingSingleton.afterSingletonsInstantiated()` or rely on the context
refresh event: implementing `ApplicationListener<ContextRefreshedEvent>` or
declaring its annotation equivalent `@EventListener(ContextRefreshedEvent.class)`.
@@ -187,7 +187,7 @@ xref:core/beans/java/bean-annotation.adoc#beans-java-lifecycle-callbacks[Receivi
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class ExampleBean {
@@ -199,7 +199,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ExampleBean {
@@ -221,7 +221,7 @@ The preceding definition has almost exactly the same effect as the following def
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class AnotherExampleBean implements DisposableBean {
@@ -234,7 +234,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class AnotherExampleBean : DisposableBean {
@@ -295,7 +295,7 @@ following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class DefaultBlogService implements BlogService {
@@ -316,7 +316,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class DefaultBlogService : BlogService {
@@ -551,7 +551,7 @@ declared on the `ConfigurableApplicationContext` interface, as the following exa
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
@@ -573,7 +573,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.context.support.ClassPathXmlApplicationContext
@@ -607,7 +607,7 @@ bean creation phase and its subsequent initial publication, they need to be decl
`volatile` or guarded by a common lock whenever accessed.
Note that concurrent access to such configuration state in singleton bean instances,
for example, for controller instances or repository instances, is perfectly thread-safe after
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.
@@ -617,7 +617,7 @@ structures (or in `volatile` fields for simple cases) as per common Java guideli
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, for example, a start callback is guaranteed to
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
@@ -251,7 +251,7 @@ to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@RequestScope
@Component
@@ -262,7 +262,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@RequestScope
@Component
@@ -301,7 +301,7 @@ When using annotation-driven components or Java configuration, you can use the
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@SessionScope
@Component
@@ -312,7 +312,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@SessionScope
@Component
@@ -350,7 +350,7 @@ following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@ApplicationScope
@Component
@@ -361,7 +361,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@ApplicationScope
@Component
@@ -584,14 +584,14 @@ underlying scope:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Object get(String name, ObjectFactory<?> objectFactory)
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun get(name: String, objectFactory: ObjectFactory<*>): Any
----
@@ -606,14 +606,14 @@ the underlying scope:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Object remove(String name)
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun remove(name: String): Any
----
@@ -626,14 +626,14 @@ destroyed or when the specified object in the scope is destroyed:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
void registerDestructionCallback(String name, Runnable destructionCallback)
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun registerDestructionCallback(name: String, destructionCallback: Runnable)
----
@@ -648,14 +648,14 @@ The following method obtains the conversation identifier for the underlying scop
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
String getConversationId()
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun getConversationId(): String
----
@@ -677,14 +677,14 @@ method to register a new `Scope` with the Spring container:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
void registerScope(String scopeName, Scope scope);
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun registerScope(scopeName: String, scope: Scope)
----
@@ -710,7 +710,7 @@ implementations.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Scope threadScope = new SimpleThreadScope();
beanFactory.registerScope("thread", threadScope);
@@ -718,7 +718,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val threadScope = SimpleThreadScope()
beanFactory.registerScope("thread", threadScope)
@@ -19,7 +19,7 @@ The simplest possible `@Configuration` class reads as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -33,7 +33,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -64,7 +64,7 @@ This prevents the same `@Bean` method from accidentally being invoked through a
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,
`@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).
@@ -25,7 +25,7 @@ the method name. The following example shows a `@Bean` method declaration:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -39,7 +39,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -75,7 +75,7 @@ configurations by implementing interfaces with bean definitions on default metho
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public interface BaseConfig {
@@ -99,7 +99,7 @@ return type, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -113,7 +113,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -153,7 +153,7 @@ parameter, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -167,7 +167,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -211,7 +211,7 @@ on the `bean` element, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class BeanOne {
@@ -244,7 +244,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class BeanOne {
@@ -291,7 +291,7 @@ The following example shows how to prevent an automatic destruction callback for
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Bean(destroyMethod = "")
public DataSource dataSource() throws NamingException {
@@ -301,7 +301,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Bean(destroyMethod = "")
fun dataSource(): DataSource {
@@ -326,7 +326,7 @@ following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -344,7 +344,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -382,7 +382,7 @@ as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class MyConfiguration {
@@ -397,7 +397,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class MyConfiguration {
@@ -431,7 +431,7 @@ it resembles the following:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// an HTTP Session-scoped bean exposed as a proxy
@Bean
@@ -451,7 +451,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// an HTTP Session-scoped bean exposed as a proxy
@Bean
@@ -479,7 +479,7 @@ as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -493,7 +493,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -517,7 +517,7 @@ The following example shows how to set a number of aliases for a bean:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -531,7 +531,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -559,7 +559,7 @@ annotation, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -574,7 +574,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -16,7 +16,7 @@ another configuration class, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class ConfigA {
@@ -40,7 +40,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class ConfigA {
@@ -67,7 +67,7 @@ following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
ApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigB.class);
@@ -80,7 +80,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -116,14 +116,14 @@ the configuration model, in that references to other beans must be valid Java sy
Fortunately, solving this problem is simple. As
xref:core/beans/java/bean-annotation.adoc#beans-java-dependencies[we already discussed],
a `@Bean` method can have an arbitrary number of parameters that describe the bean
dependencies. Consider the following more realistic scenario with several `@Configuration`
dependencies. Consider the following more real-world scenario with several `@Configuration`
classes, each depending on beans declared in the others:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class ServiceConfig {
@@ -163,7 +163,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -219,7 +219,7 @@ parameter-based injection, as in the preceding example.
Avoid access to locally defined beans within a `@PostConstruct` method on the same configuration
class. This effectively leads to a circular reference since non-static `@Bean` methods semantically
require a fully initialized configuration class instance to be called on. With circular references
disallowed (for example, in Spring Boot 2.6+), this may trigger a `BeanCurrentlyInCreationException`.
disallowed (e.g. in Spring Boot 2.6+), this may trigger a `BeanCurrentlyInCreationException`.
Also, be particularly careful with `BeanPostProcessor` and `BeanFactoryPostProcessor` definitions
through `@Bean`. Those should usually be declared as `static @Bean` methods, not triggering the
@@ -234,7 +234,7 @@ The following example shows how one bean can be autowired to another bean:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class ServiceConfig {
@@ -283,7 +283,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -331,10 +331,8 @@ TIP: Constructor injection in `@Configuration` classes is only supported as of S
Framework 4.3. Note also that there is no need to specify `@Autowired` if the target
bean defines only one constructor.
[discrete]
[[beans-java-injecting-imported-beans-fq]]
==== Fully-qualifying imported beans for ease of navigation
.[[beans-java-injecting-imported-beans-fq]]Fully-qualifying imported beans for ease of navigation
--
In the preceding scenario, using `@Autowired` works well and provides the desired
modularity, but determining exactly where the autowired bean definitions are declared is
still somewhat ambiguous. For example, as a developer looking at `ServiceConfig`, how do
@@ -353,7 +351,7 @@ configuration classes themselves. The following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class ServiceConfig {
@@ -371,7 +369,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class ServiceConfig {
@@ -397,7 +395,7 @@ abstract class-based `@Configuration` classes. Consider the following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class ServiceConfig {
@@ -447,7 +445,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -503,6 +501,7 @@ Now `ServiceConfig` is loosely coupled with respect to the concrete
get a type hierarchy of `RepositoryConfig` implementations. In this
way, navigating `@Configuration` classes and their dependencies becomes no different
than the usual process of navigating interface-based code.
--
[[beans-java-startup]]
@@ -570,7 +569,7 @@ method that returns `true` or `false`. For example, the following listing shows
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Override
public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
@@ -578,7 +577,7 @@ Java::
MultiValueMap<String, Object> attrs = metadata.getAllAnnotationAttributes(Profile.class.getName());
if (attrs != null) {
for (Object value : attrs.get("value")) {
if (context.getEnvironment().matchesProfiles((String[]) value)) {
if (context.getEnvironment().acceptsProfiles(((String[]) value))) {
return true;
}
}
@@ -590,14 +589,14 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
override fun matches(context: ConditionContext, metadata: AnnotatedTypeMetadata): Boolean {
// Read the @Profile annotation attributes
val attrs = metadata.getAllAnnotationAttributes(Profile::class.java.name)
if (attrs != null) {
for (value in attrs["value"]!!) {
if (context.environment.matchesProfiles(*value as Array<String>)) {
if (context.environment.acceptsProfiles(Profiles.of(*value as Array<String>))) {
return true
}
}
@@ -632,24 +631,22 @@ that uses Spring XML, it is easier to create `@Configuration` classes on an
as-needed basis and include them from the existing XML files. Later in this section, we cover the
options for using `@Configuration` classes in this kind of "`XML-centric`" situation.
[discrete]
[[beans-java-combining-xml-centric-declare-as-bean]]
==== Declaring `@Configuration` classes as plain Spring `<bean/>` elements
Remember that `@Configuration` classes are ultimately bean definitions in the container.
In this series of examples, we create a `@Configuration` class named `AppConfig` and
.[[beans-java-combining-xml-centric-declare-as-bean]]Declaring `@Configuration` classes as plain Spring `<bean/>` elements
--
Remember that `@Configuration` classes are ultimately bean definitions in the
container. In this series examples, we create a `@Configuration` class named `AppConfig` and
include it within `system-test-config.xml` as a `<bean/>` definition. Because
`<context:annotation-config/>` is switched on, the container recognizes the
`@Configuration` annotation and processes the `@Bean` methods declared in `AppConfig`
properly.
The following example shows the `AppConfig` configuration class in Java and Kotlin:
The following example shows an ordinary configuration class in Java:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -664,14 +661,14 @@ Java::
@Bean
public TransferService transferService() {
return new TransferServiceImpl(accountRepository());
return new TransferService(accountRepository());
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -697,7 +694,6 @@ The following example shows part of a sample `system-test-config.xml` file:
<beans>
<!-- enable processing of annotations such as @Autowired and @Configuration -->
<context:annotation-config/>
<context:property-placeholder location="classpath:/com/acme/jdbc.properties"/>
<bean class="com.acme.AppConfig"/>
@@ -723,7 +719,7 @@ jdbc.password=
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:/com/acme/system-test-config.xml");
@@ -734,7 +730,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun main() {
val ctx = ClassPathXmlApplicationContext("classpath:/com/acme/system-test-config.xml")
@@ -744,20 +740,20 @@ Kotlin::
----
======
NOTE: In the `system-test-config.xml` file, the `AppConfig` `<bean/>` does not declare an `id`
attribute. While it would be acceptable to do so, it is unnecessary, given that no other bean
NOTE: In `system-test-config.xml` file, the `AppConfig` `<bean/>` does not declare an `id`
element. While it would be acceptable to do so, it is unnecessary, given that no other bean
ever refers to it, and it is unlikely to be explicitly fetched from the container by name.
Similarly, the `DataSource` bean is only ever autowired by type, so an explicit bean `id`
is not strictly required.
--
[discrete]
[[beans-java-combining-xml-centric-component-scan]]
==== Using <context:component-scan/> to pick up `@Configuration` classes
.[[beans-java-combining-xml-centric-component-scan]] Using <context:component-scan/> to pick up `@Configuration` classes
--
Because `@Configuration` is meta-annotated with `@Component`, `@Configuration`-annotated
classes are automatically candidates for component scanning. Using the same scenario as
described in the previous example, we can redefine `system-test-config.xml` to take
advantage of component-scanning. Note that, in this case, we need not explicitly declare
described in the previous example, we can redefine `system-test-config.xml` to take advantage of component-scanning.
Note that, in this case, we need not explicitly declare
`<context:annotation-config/>`, because `<context:component-scan/>` enables the same
functionality.
@@ -768,7 +764,6 @@ The following example shows the modified `system-test-config.xml` file:
<beans>
<!-- picks up and registers AppConfig as a bean definition -->
<context:component-scan base-package="com.acme"/>
<context:property-placeholder location="classpath:/com/acme/jdbc.properties"/>
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource">
@@ -778,23 +773,25 @@ The following example shows the modified `system-test-config.xml` file:
</bean>
</beans>
----
--
[[beans-java-combining-java-centric]]
=== `@Configuration` Class-centric Use of XML with `@ImportResource`
In applications where `@Configuration` classes are the primary mechanism for configuring
the container, it may still be necessary to use at least some XML. In such scenarios, you
can use `@ImportResource` and define only as much XML as you need. Doing so achieves a
"`Java-centric`" approach to configuring the container and keeps XML to a bare minimum.
The following example (which includes a configuration class, an XML file that defines a
bean, a properties file, and the `main()` method) shows how to use the `@ImportResource`
annotation to achieve "`Java-centric`" configuration that uses XML as needed:
the container, it is still likely necessary to use at least some XML. In these
scenarios, you can use `@ImportResource` and define only as much XML as you need. Doing
so achieves a "`Java-centric`" approach to configuring the container and keeps XML to a
bare minimum. The following example (which includes a configuration class, an XML file
that defines a bean, a properties file, and the `main` class) shows how to use
the `@ImportResource` annotation to achieve "`Java-centric`" configuration that uses XML
as needed:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ImportResource("classpath:/com/acme/properties-config.xml")
@@ -813,23 +810,12 @@ Java::
public DataSource dataSource() {
return new DriverManagerDataSource(url, username, password);
}
@Bean
public AccountRepository accountRepository(DataSource dataSource) {
return new JdbcAccountRepository(dataSource);
}
@Bean
public TransferService transferService(AccountRepository accountRepository) {
return new TransferServiceImpl(accountRepository);
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ImportResource("classpath:/com/acme/properties-config.xml")
@@ -848,32 +834,21 @@ Kotlin::
fun dataSource(): DataSource {
return DriverManagerDataSource(url, username, password)
}
@Bean
fun accountRepository(dataSource: DataSource): AccountRepository {
return JdbcAccountRepository(dataSource)
}
@Bean
fun transferService(accountRepository: AccountRepository): TransferService {
return TransferServiceImpl(accountRepository)
}
}
----
======
.properties-config.xml
[source,xml,indent=0,subs="verbatim,quotes"]
----
properties-config.xml
<beans>
<context:property-placeholder location="classpath:/com/acme/jdbc.properties"/>
</beans>
----
.jdbc.properties
[literal,subs="verbatim,quotes"]
----
jdbc.properties
jdbc.url=jdbc:hsqldb:hsql://localhost/xdb
jdbc.username=sa
jdbc.password=
@@ -883,7 +858,7 @@ jdbc.password=
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
ApplicationContext ctx = new AnnotationConfigApplicationContext(AppConfig.class);
@@ -894,7 +869,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -906,3 +881,5 @@ Kotlin::
----
======
@@ -17,7 +17,7 @@ as having one bean method call another, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -36,7 +36,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -72,7 +72,7 @@ following example shows how to use lookup method injection:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public abstract class CommandManager {
public Object process(Object commandState) {
@@ -90,7 +90,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
abstract class CommandManager {
fun process(commandState: Any): Any {
@@ -115,7 +115,7 @@ the abstract `createCommand()` method is overridden in such a way that it looks
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Bean
@Scope("prototype")
@@ -139,7 +139,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Bean
@Scope("prototype")
@@ -172,7 +172,7 @@ Consider the following example, which shows a `@Bean` annotated method being cal
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
public class AppConfig {
@@ -200,7 +200,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
class AppConfig {
@@ -27,7 +27,7 @@ XML-free usage of the Spring container, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
ApplicationContext ctx = new AnnotationConfigApplicationContext(AppConfig.class);
@@ -38,7 +38,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -58,7 +58,7 @@ as input to the constructor, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
ApplicationContext ctx = new AnnotationConfigApplicationContext(MyServiceImpl.class, Dependency1.class, Dependency2.class);
@@ -69,7 +69,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -97,7 +97,7 @@ example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
@@ -111,7 +111,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import org.springframework.beans.factory.getBean
@@ -136,7 +136,7 @@ To enable component scanning, you can annotate your `@Configuration` class as fo
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ComponentScan(basePackages = "com.acme") // <1>
@@ -148,7 +148,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ComponentScan(basePackages = ["com.acme"]) // <1>
@@ -183,7 +183,7 @@ following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public static void main(String[] args) {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
@@ -195,7 +195,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun main() {
val ctx = AnnotationConfigApplicationContext()
@@ -33,7 +33,7 @@ Instead of `@Autowired`, you can use `@jakarta.inject.Inject` as follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
import jakarta.inject.Inject;
@@ -55,7 +55,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import jakarta.inject.Inject
@@ -83,7 +83,7 @@ preceding example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
import jakarta.inject.Inject;
import jakarta.inject.Provider;
@@ -106,7 +106,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import jakarta.inject.Inject
@@ -131,7 +131,7 @@ you should use the `@Named` annotation, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
import jakarta.inject.Inject;
import jakarta.inject.Named;
@@ -151,7 +151,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import jakarta.inject.Inject
import jakarta.inject.Named
@@ -190,7 +190,7 @@ a `required` attribute. The following pair of examples show how to use `@Inject`
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -203,7 +203,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -225,7 +225,7 @@ as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
import jakarta.inject.Inject;
import jakarta.inject.Named;
@@ -246,7 +246,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import jakarta.inject.Inject
import jakarta.inject.Named
@@ -269,7 +269,7 @@ It is very common to use `@Component` without specifying a name for the componen
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
import jakarta.inject.Inject;
import jakarta.inject.Named;
@@ -290,7 +290,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
import jakarta.inject.Inject
import jakarta.inject.Named
@@ -313,7 +313,7 @@ exact same way as when you use Spring annotations, as the following example show
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration
@ComponentScan(basePackages = "org.example")
@@ -324,7 +324,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Configuration
@ComponentScan(basePackages = ["org.example"])
@@ -29,7 +29,7 @@ a `DataBuffer` implementation and that does not involve allocation.
Note that WebFlux applications do not create a `DataBufferFactory` directly but instead
access it through the `ServerHttpResponse` or the `ClientHttpRequest` on the client side.
The type of factory depends on the underlying client or server, for example,
The type of factory depends on the underlying client or server, e.g.
`NettyDataBufferFactory` for Reactor Netty, `DefaultDataBufferFactory` for others.
@@ -82,7 +82,7 @@ to use the convenience methods in `DataBufferUtils` that apply release or retain
`DataBufferUtils` offers a number of utility methods to operate on data buffers:
* Join a stream of data buffers into a single buffer possibly with zero copy, for example, via
* Join a stream of data buffers into a single buffer possibly with zero copy, e.g. via
composite buffers, if that's supported by the underlying byte buffer API.
* Turn `InputStream` or NIO `Channel` into `Flux<DataBuffer>`, and vice versa a
`Publisher<DataBuffer>` into `OutputStream` or NIO `Channel`.
@@ -144,7 +144,7 @@ a serialization error occurs while populating the buffer with data. For example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
DataBuffer buffer = factory.allocateBuffer();
boolean release = true;
@@ -162,7 +162,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val buffer = factory.allocateBuffer()
var release = true
@@ -12,7 +12,7 @@ expression, `Hello World`.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
Expression exp = parser.parseExpression("'Hello World'"); // <1>
@@ -22,7 +22,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val exp = parser.parseExpression("'Hello World'") // <1>
@@ -51,7 +51,7 @@ literal, `Hello World`.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
Expression exp = parser.parseExpression("'Hello World'.concat('!')"); // <1>
@@ -61,7 +61,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val exp = parser.parseExpression("'Hello World'.concat('!')") // <1>
@@ -77,7 +77,7 @@ string literal, `Hello World`.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
@@ -89,7 +89,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
@@ -110,7 +110,7 @@ The following example shows how to use dot notation to get the length of a strin
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
@@ -122,7 +122,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
@@ -140,7 +140,7 @@ example shows.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
Expression exp = parser.parseExpression("new String('hello world').toUpperCase()"); // <1>
@@ -150,7 +150,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val exp = parser.parseExpression("new String('hello world').toUpperCase()") // <1>
@@ -173,7 +173,7 @@ reference the `name` property in a boolean expression.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// Create and set a calendar
GregorianCalendar c = new GregorianCalendar();
@@ -195,7 +195,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// Create and set a calendar
val c = GregorianCalendar()
@@ -222,38 +222,29 @@ Kotlin::
[[expressions-evaluation-context]]
== Understanding `EvaluationContext`
The `EvaluationContext` API is used when evaluating an expression to resolve properties,
methods, or fields and to help perform type conversion. Spring provides two
The `EvaluationContext` interface is used when evaluating an expression to resolve
properties, methods, or fields and to help perform type conversion. Spring provides two
implementations.
`SimpleEvaluationContext`::
Exposes a subset of essential SpEL language features and configuration options, for
categories of expressions that do not require the full extent of the SpEL language
syntax and should be meaningfully restricted. Examples include but are not limited to
data binding expressions and property-based filters.
* `SimpleEvaluationContext`: Exposes a subset of essential SpEL language features and
configuration options, for categories of expressions that do not require the full extent
of the SpEL language syntax and should be meaningfully restricted. Examples include but
are not limited to data binding expressions and property-based filters.
`StandardEvaluationContext`::
Exposes the full set of SpEL language features and configuration options. You can use
it to specify a default root object and to configure every available evaluation-related
strategy.
* `StandardEvaluationContext`: Exposes the full set of SpEL language features and
configuration options. You can use it to specify a default root object and to configure
every available evaluation-related strategy.
`SimpleEvaluationContext` is designed to support only a subset of the SpEL language
syntax. For example, it excludes Java type references, constructors, and bean references.
It also requires you to explicitly choose the level of support for properties and methods
in expressions. When creating a `SimpleEvaluationContext` you need to choose the level of
support that you need for data binding in SpEL expressions:
`SimpleEvaluationContext` is designed to support only a subset of the SpEL language syntax.
It excludes Java type references, constructors, and bean references. It also requires
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.
* Data binding for read-only access
* Data binding for read and write access
* A custom `PropertyAccessor` (typically not reflection-based), potentially combined with
a `DataBindingPropertyAccessor`
Conveniently, `SimpleEvaluationContext.forReadOnlyDataBinding()` enables read-only access
to properties via `DataBindingPropertyAccessor`. Similarly,
`SimpleEvaluationContext.forReadWriteDataBinding()` enables read and write access to
properties. Alternatively, configure custom accessors via
`SimpleEvaluationContext.forPropertyAccessors(...)`, potentially disable assignment, and
optionally activate method resolution and/or a type converter through the builder.
* Custom `PropertyAccessor` only (no reflection)
* Data binding properties for read-only access
* Data binding properties for read and write
[[expressions-type-conversion]]
@@ -275,7 +266,7 @@ being placed in it. The following example shows how to do so.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
class Simple {
public List<Boolean> booleanList = new ArrayList<>();
@@ -296,7 +287,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class Simple {
var booleanList: MutableList<Boolean> = ArrayList()
@@ -323,23 +314,23 @@ Kotlin::
It is possible to configure the SpEL expression parser by using a parser configuration
object (`org.springframework.expression.spel.SpelParserConfiguration`). The configuration
object controls the behavior of some of the expression components. For example, if you
index into a collection and the element at the specified index is `null`, SpEL can
automatically create the element. This is useful when using expressions made up of a
chain of property references. Similarly, if you index into a collection and specify an
index that is greater than the current size of the collection, SpEL can automatically
grow the collection to accommodate that index. In order to add an element at the
index into an array or collection and the element at the specified index is `null`, SpEL
can automatically create the element. This is useful when using expressions made up of a
chain of property references. If you index into an array or list and specify an index
that is beyond the end of the current size of the array or list, SpEL can automatically
grow the array or list to accommodate that index. In order to add an element at the
specified index, SpEL will try to create the element using the element type's default
constructor before setting the specified value. If the element type does not have a
default constructor, `null` will be added to the collection. If there is no built-in
converter or custom converter that knows how to set the value, `null` will remain in the
collection at the specified index. The following example demonstrates how to
automatically grow a `List`.
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.
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
class Demo {
public List<String> list;
@@ -364,7 +355,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class Demo {
var list: List<String>? = null
@@ -444,27 +435,18 @@ 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.
`OFF` ::
The compiler is switched off, and all expressions will be evaluated in _interpreted_
mode. This is the default mode.
`IMMEDIATE` ::
In immediate mode, expressions are compiled as soon as possible, typically after the
first interpreted evaluation. If evaluation of the compiled expression fails (for
example, due to a type changing, as described earlier), the caller of the expression
evaluation receives an exception. If the types of various expression elements change
over time, consider switching to `MIXED` mode or turning off the compiler.
`MIXED` ::
In mixed mode, expression evaluation silently switches between _interpreted_ and
_compiled_ over time. After some number of successful interpreted runs, the expression
gets compiled. If evaluation of the compiled expression fails (for example, due to a
type changing), that failure will be caught internally, and the system will switch back
to interpreted mode for the given expression. Basically, the exception that the caller
receives in `IMMEDIATE` mode is instead handled internally. Sometime later, the
compiler may generate another compiled form and switch to it. This cycle of switching
between interpreted and compiled mode will continue until the system determines that it
does not make sense to continue trying — for example, when a certain failure threshold
has been reached — at which point the system will permanently switch to interpreted
mode for the given expression.
* `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.
`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
@@ -479,7 +461,7 @@ following example shows how to do so.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
SpelParserConfiguration config = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE,
this.getClass().getClassLoader());
@@ -495,7 +477,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val config = SpelParserConfiguration(SpelCompilerMode.IMMEDIATE,
this.javaClass.classLoader)
@@ -9,7 +9,7 @@ This section lists the classes used in the examples throughout this chapter.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package org.spring.samples.spel.inventor;
@@ -84,7 +84,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package org.spring.samples.spel.inventor
@@ -103,7 +103,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package org.spring.samples.spel.inventor;
@@ -141,7 +141,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package org.spring.samples.spel.inventor
@@ -155,7 +155,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,java,indent=0,subs="verbatim,quotes",role="primary",chomp="-packages"]
----
package org.spring.samples.spel.inventor;
@@ -200,7 +200,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary",chomp="-packages"]
----
package org.spring.samples.spel.inventor
@@ -8,7 +8,7 @@ to have the array populated at construction time. The following example shows ho
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
int[] numbers1 = (int[]) parser.parseExpression("new int[4]").getValue(context);
@@ -21,7 +21,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val numbers1 = parser.parseExpression("new int[4]").getValue(context) as IntArray
@@ -9,7 +9,7 @@ to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
StandardEvaluationContext context = new StandardEvaluationContext();
@@ -22,7 +22,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val context = StandardEvaluationContext()
@@ -47,7 +47,7 @@ symbol. The following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
StandardEvaluationContext context = new StandardEvaluationContext();
@@ -60,7 +60,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val context = StandardEvaluationContext()
@@ -11,7 +11,7 @@ list. The following example uses projection to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// evaluates to ["Smiljan", "Idvor"]
List placesOfBirth = parser.parseExpression("members.![placeOfBirth.city]")
@@ -20,7 +20,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// evaluates to ["Smiljan", "Idvor"]
val placesOfBirth = parser.parseExpression("members.![placeOfBirth.city]")
@@ -12,7 +12,7 @@ selection lets us easily get a list of Serbian inventors, as the following examp
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
List<Inventor> list = (List<Inventor>) parser.parseExpression(
"members.?[nationality == 'Serbian']").getValue(societyContext);
@@ -20,7 +20,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val list = parser.parseExpression(
"members.?[nationality == 'Serbian']").getValue(societyContext) as List<Inventor>
@@ -41,14 +41,14 @@ than 27:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Map newMap = parser.parseExpression("#map.?[value < 27]").getValue(Map.class);
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val newMap = parser.parseExpression("#map.?[value < 27]").getValue() as Map
----
@@ -3,40 +3,39 @@
You can invoke constructors by using the `new` operator. You should use the fully
qualified class name for all types except those located in the `java.lang` package
(`Integer`, `Float`, `String`, and so on).
xref:core/expressions/language-ref/varargs.adoc[Varargs] are also supported.
The following example shows how to use the `new` operator to invoke constructors.
(`Integer`, `Float`, `String`, and so on). The following example shows how to use the
`new` operator to invoke constructors:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Inventor einstein = parser.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
Inventor einstein = p.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
.getValue(Inventor.class);
// create new Inventor instance within the add() method of List
parser.parseExpression(
"Members.add(new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German'))")
.getValue(societyContext);
p.parseExpression(
"Members.add(new org.spring.samples.spel.inventor.Inventor(
'Albert Einstein', 'German'))").getValue(societyContext);
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val einstein = parser.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
val einstein = p.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
.getValue(Inventor::class.java)
// create new Inventor instance within the add() method of List
parser.parseExpression(
"Members.add(new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German'))")
p.parseExpression(
"Members.add(new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German'))")
.getValue(societyContext)
----
======
@@ -2,12 +2,8 @@
= Functions
You can extend SpEL by registering user-defined functions that can be called within
expressions by using the `#functionName(...)` syntax, and like with standard method
invocations, xref:core/expressions/language-ref/varargs.adoc[varargs] are also supported
for function invocations.
Functions can be registered as _variables_ in `EvaluationContext` implementations via the
`setVariable()` method.
expressions by using the `#functionName(...)` syntax. Functions can be registered as
variables in `EvaluationContext` implementations via the `setVariable()` method.
[TIP]
====
@@ -30,7 +26,7 @@ reflection using a `java.lang.reflect.Method`:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Method method = ...;
@@ -40,7 +36,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val method: Method = ...
@@ -55,7 +51,7 @@ For example, consider the following utility method that reverses a string:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public abstract class StringUtils {
@@ -67,7 +63,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
fun reverseString(input: String): String {
return StringBuilder(input).reverse().toString()
@@ -81,7 +77,7 @@ You can register and use the preceding method, as the following example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
@@ -96,7 +92,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
@@ -114,9 +110,8 @@ potentially more efficient use cases if the `MethodHandle` target and parameters
been fully bound prior to registration; however, partially bound handles are also
supported.
Consider the `String#formatted(Object...)` instance method, which produces a message
according to a template and a variable number of arguments
(xref:core/expressions/language-ref/varargs.adoc[varargs]).
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:
@@ -125,7 +120,7 @@ example shows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataBinding().build();
@@ -141,7 +136,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val context = SimpleEvaluationContext.forReadOnlyDataBinding().build()
@@ -156,16 +151,16 @@ Kotlin::
----
======
As mentioned 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:
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"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataBinding().build();
@@ -173,10 +168,9 @@ Java::
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))
MethodType.methodType(String.class, Object[].class))
.bindTo(template)
// Here we have to provide the arguments in a single array binding:
.bindTo(varargs);
.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!>"
@@ -186,7 +180,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val context = SimpleEvaluationContext.forReadOnlyDataBinding().build()
@@ -195,10 +189,9 @@ Kotlin::
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))
MethodType.methodType(String::class.java, Array<Any>::class.java))
.bindTo(template)
// Here we have to provide the arguments in a single array binding:
.bindTo(varargs)
.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!>"
@@ -208,3 +201,4 @@ Kotlin::
======
@@ -7,7 +7,7 @@ You can directly express lists in an expression by using `{}` notation.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// evaluates to a Java list containing the four numbers
List numbers = (List) parser.parseExpression("{1,2,3,4}").getValue(context);
@@ -17,7 +17,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// evaluates to a Java list containing the four numbers
val numbers = parser.parseExpression("{1,2,3,4}").getValue(context) as List<*>
@@ -8,7 +8,7 @@ following example shows how to do so:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// evaluates to a Java map containing the two entries
Map inventorInfo = (Map) parser.parseExpression("{name:'Nikola',dob:'10-July-1856'}").getValue(context);
@@ -18,7 +18,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
// evaluates to a Java map containing the two entries
val inventorInfo = parser.parseExpression("{name:'Nikola',dob:'10-July-1856'}").getValue(context) as Map<*, *>
@@ -53,7 +53,7 @@ method.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
@@ -75,7 +75,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
@@ -1,17 +1,15 @@
[[expressions-methods]]
= Methods
You can invoke methods by using the typical Java programming syntax. You can also invoke
methods directly on literals such as strings or numbers.
xref:core/expressions/language-ref/varargs.adoc[Varargs] are supported as well.
The following examples show how to invoke methods.
You can invoke methods by using typical Java programming syntax. You can also invoke methods
on literals. Variable arguments are also supported. The following examples show how to
invoke methods:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// string literal, evaluates to "bc"
String bc = parser.parseExpression("'abc'.substring(1, 3)").getValue(String.class);
@@ -23,7 +21,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// string literal, evaluates to "bc"
val bc = parser.parseExpression("'abc'.substring(1, 3)").getValue(String::class.java)
@@ -19,7 +19,7 @@ The following example shows how to use the Elvis operator:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
@@ -29,7 +29,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
@@ -48,7 +48,7 @@ The following listing shows a more complex example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataBinding().build();
@@ -64,7 +64,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val context = SimpleEvaluationContext.forReadOnlyDataBinding().build()
@@ -27,7 +27,7 @@ The following example shows how to use the safe navigation operator for property
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
EvaluationContext context = SimpleEvaluationContext.forReadOnlyDataBinding().build();
@@ -50,7 +50,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val context = SimpleEvaluationContext.forReadOnlyDataBinding().build()
@@ -100,7 +100,7 @@ a list (`?.[]`).
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
IEEE society = new IEEE();
@@ -121,7 +121,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val society = IEEE()
@@ -161,7 +161,7 @@ selection (`?.?`).
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
IEEE society = new IEEE();
@@ -182,7 +182,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val society = IEEE()
@@ -209,7 +209,7 @@ collections (`?.^`).
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
IEEE society = new IEEE();
@@ -231,7 +231,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val society = IEEE()
@@ -260,7 +260,7 @@ collections (`?.$`).
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
IEEE society = new IEEE();
@@ -282,7 +282,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val society = IEEE()
@@ -310,7 +310,7 @@ projection (`?.!`).
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
IEEE society = new IEEE();
@@ -331,7 +331,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val society = IEEE()
@@ -380,7 +380,7 @@ evaluates to `null` instead of throwing an exception.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
ExpressionParser parser = new SpelExpressionParser();
IEEE society = new IEEE();
@@ -401,7 +401,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val parser = SpelExpressionParser()
val society = IEEE()
@@ -8,7 +8,7 @@ the expression. The following listing shows a minimal example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
String falseString = parser.parseExpression(
"false ? 'trueExp' : 'falseExp'").getValue(String.class);
@@ -16,7 +16,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val falseString = parser.parseExpression(
"false ? 'trueExp' : 'falseExp'").getValue(String::class.java)
@@ -30,7 +30,7 @@ realistic example follows:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
parser.parseExpression("name").setValue(societyContext, "IEEE");
societyContext.setVariable("queryName", "Nikola Tesla");
@@ -45,7 +45,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
parser.parseExpression("name").setValue(societyContext, "IEEE")
societyContext.setVariable("queryName", "Nikola Tesla")
@@ -24,7 +24,7 @@ The following listing shows a few examples of relational operators:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// evaluates to true
boolean trueValue = parser.parseExpression("2 == 2").getValue(Boolean.class);
@@ -41,7 +41,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// evaluates to true
val trueValue = parser.parseExpression("2 == 2").getValue(Boolean::class.java)
@@ -89,7 +89,7 @@ shows examples of all three:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
boolean result;
@@ -128,7 +128,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// evaluates to true
var result = parser.parseExpression(
@@ -195,7 +195,7 @@ The following example shows how to use the logical operators:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// -- AND --
@@ -228,7 +228,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// -- AND --
@@ -277,7 +277,7 @@ The following example shows the `String` operators in use:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
// -- Concatenation --
@@ -300,7 +300,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
// -- Concatenation --
@@ -358,7 +358,7 @@ The following example shows the mathematical operators in use:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Inventor inventor = new Inventor();
EvaluationContext context = SimpleEvaluationContext.forReadWriteDataBinding().build();
@@ -424,7 +424,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val inventor = Inventor()
val context = SimpleEvaluationContext.forReadWriteDataBinding().build()
@@ -501,7 +501,7 @@ listing shows both ways to use the assignment operator:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
Inventor inventor = new Inventor();
EvaluationContext context = SimpleEvaluationContext.forReadWriteDataBinding().build();
@@ -515,7 +515,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
val inventor = Inventor()
val context = SimpleEvaluationContext.forReadWriteDataBinding().build()
@@ -541,7 +541,7 @@ 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"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
pubic class ListConcatenation implements OperatorOverloader {
@@ -576,7 +576,7 @@ as demonstrated in the following example.
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
StandardEvaluationContext context = new StandardEvaluationContext();
context.setOperatorOverloader(new ListConcatenation());
@@ -587,7 +587,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
StandardEvaluationContext context = StandardEvaluationContext()
context.setOperatorOverloader(ListConcatenation())

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