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Author SHA1 Message Date
Stéphane Nicoll 34764252dc Release v6.1.12 2024-08-14 12:38:39 +02:00
9373 changed files with 51909 additions and 148826 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issue will be closed as superseded.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 +1,23 @@
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
pre-release:
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'
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 }}
run: gh release create ${{ format('v{0}', inputs.milestone) }} --notes-file changelog.md ${{ inputs.pre-release == 'true' && '--prerelease' || '' }}
shell: bash
run: gh release create ${{ format('v{0}', inputs.milestone) }} --notes-file changelog.md
+16 -21
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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@v5
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@4d9f0ba0025fe599b4ebab900eb7f3a1d93ef4c2 # v5.0.0
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: |
@@ -1,17 +0,0 @@
name: Print JVM thread dumps
description: 'Prints a thread dump for all running JVMs'
runs:
using: composite
steps:
- if: ${{ runner.os == 'Linux' }}
shell: bash
run: |
for jvm_pid in $(jps -q -J-XX:+PerfDisableSharedMem); do
jcmd $jvm_pid Thread.print
done
- if: ${{ runner.os == 'Windows' }}
shell: powershell
run: |
foreach ($jvm_pid in $(jps -q -J-XX:+PerfDisableSharedMem)) {
jcmd $jvm_pid Thread.print
}
+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
@@ -1,33 +1,42 @@
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:
central-token-password:
description: 'Password for authentication with central.sonatype.com'
required: true
central-token-username:
description: 'Username for authentication with central.sonatype.com'
required: true
jfrog-cli-config-token:
description: 'Config token for the JFrog CLI'
required: true
spring-framework-version:
description: 'Version of Spring Framework that is being synced to Central'
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
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@5b06f730cc5a6f55d78b30753f8583454b08c0aa # v4.8.1
uses: jfrog/setup-jfrog-cli@105617d23456a69a92485207c4f28ae12297581d # v4.2.1
env:
JF_ENV_SPRING: ${{ inputs.jfrog-cli-config-token }}
- name: Download Release Artifacts
shell: bash
run: jf rt download --spec ${{ format('{0}/artifacts.spec', github.action_path) }} --spec-vars 'buildName=${{ format('spring-framework-{0}', inputs.spring-framework-version) }};buildNumber=${{ github.run_number }}'
- name: Sync
uses: spring-io/central-publish-action@0c03960e9b16fdfe70e2443e1d5393cbc3a35622 # v0.3.0
uses: spring-io/nexus-sync-action@42477a2230a2f694f9eaa4643fa9e76b99b7ab84 # v0.0.1
with:
token: ${{ inputs.central-token-password }}
token-name: ${{ inputs.central-token-username }}
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:
+4 -3
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@@ -1,4 +1,5 @@
name: Backport Bot
on:
issues:
types: [labeled]
@@ -18,9 +19,9 @@ jobs:
runs-on: ubuntu-latest
steps:
- name: Check out code
uses: actions/checkout@v6
uses: actions/checkout@v4
- name: Set up Java
uses: actions/setup-java@v5
uses: actions/setup-java@v4
with:
distribution: 'liberica'
java-version: 17
@@ -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"
+16 -16
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@@ -2,47 +2,47 @@ name: Build and Deploy Snapshot
on:
push:
branches:
- 6.2.x
- 6.1.x
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@v6
uses: actions/checkout@v4
- name: Build and Publish
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@926d7f7cc810569395346bf3a4d91b380b3e355b # v0.0.4
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-6.1.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:
-25
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@@ -1,25 +0,0 @@
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
steps:
- name: Check Out Code
uses: actions/checkout@v6
- name: Build
id: build
uses: ./.github/actions/build
- name: Print JVM Thread Dumps When Cancelled
if: cancelled()
uses: ./.github/actions/print-jvm-thread-dumps
- name: Upload Build Reports
if: failure()
uses: actions/upload-artifact@v6
with:
name: build-reports
path: '**/build/reports/'
+13 -11
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@@ -2,15 +2,15 @@ name: CI
on:
push:
branches:
- 6.2.x
- 6.1.x
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 +21,10 @@ jobs:
toolchain: false
- version: 21
toolchain: true
- version: 25
- version: 22
toolchain: true
- version: 23
early-access: true
toolchain: true
exclude:
- os:
@@ -36,21 +39,20 @@ jobs:
git config --global core.longPaths true
Stop-Service -name Docker
- name: Check Out Code
uses: actions/checkout@v6
uses: actions/checkout@v4
- name: Build
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 }}
+3 -4
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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@v6
uses: actions/checkout@v4
with:
fetch-depth: 1
ref: docs-build
fetch-depth: 1
- name: Dispatch (partial build)
if: github.ref_type == 'branch'
env:
+22 -21
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@@ -2,52 +2,52 @@ name: Release
on:
push:
tags:
- v6.2.[0-9]+
- v6.1.[0-9]+
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
uses: actions/checkout@v6
uses: actions/checkout@v4
- name: Build and Publish
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@926d7f7cc810569395346bf3a4d91b380b3e355b # v0.0.4
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:
@@ -56,13 +56,14 @@ jobs:
runs-on: ubuntu-latest
steps:
- name: Check Out Code
uses: actions/checkout@v6
uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
- name: Sync to Maven Central
uses: ./.github/actions/sync-to-maven-central
with:
central-token-password: ${{ secrets.CENTRAL_TOKEN_PASSWORD }}
central-token-username: ${{ secrets.CENTRAL_TOKEN_USERNAME }}
jfrog-cli-config-token: ${{ secrets.JF_ARTIFACTORY_SPRING }}
ossrh-s01-staging-profile: ${{ secrets.OSSRH_S01_STAGING_PROFILE }}
ossrh-s01-token-password: ${{ secrets.OSSRH_S01_TOKEN_PASSWORD }}
ossrh-s01-token-username: ${{ secrets.OSSRH_S01_TOKEN_USERNAME }}
spring-framework-version: ${{ needs.build-and-stage-release.outputs.version }}
promote-release:
name: Promote Release
@@ -72,7 +73,7 @@ jobs:
runs-on: ubuntu-latest
steps:
- name: Set up JFrog CLI
uses: jfrog/setup-jfrog-cli@5b06f730cc5a6f55d78b30753f8583454b08c0aa # v4.8.1
uses: jfrog/setup-jfrog-cli@105617d23456a69a92485207c4f28ae12297581d # v4.2.1
env:
JF_ENV_SPRING: ${{ secrets.JF_ARTIFACTORY_SPRING }}
- name: Promote build
@@ -85,7 +86,7 @@ jobs:
runs-on: ubuntu-latest
steps:
- name: Check Out Code
uses: actions/checkout@v6
uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
- name: Create GitHub Release
uses: ./.github/actions/create-github-release
with:
@@ -1,37 +0,0 @@
name: Update Antora UI Spring
on:
schedule:
- cron: '0 10 * * *' # Once per day at 10am UTC
workflow_dispatch:
permissions:
pull-requests: write
issues: write
contents: write
jobs:
update-antora-ui-spring:
name: Update on Supported Branches
if: ${{ github.repository == 'spring-projects/spring-framework' }}
runs-on: ubuntu-latest
strategy:
matrix:
branch: [ '6.1.x' ]
steps:
- uses: spring-io/spring-doc-actions/update-antora-spring-ui@5a57bcc6a0da2a1474136cf29571b277850432bc
name: Update
with:
docs-branch: ${{ matrix.branch }}
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
steps:
- uses: spring-io/spring-doc-actions/update-antora-spring-ui@5a57bcc6a0da2a1474136cf29571b277850432bc
name: Update
with:
docs-branch: 'docs-build'
token: ${{ secrets.GITHUB_TOKEN }}
@@ -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
+20 -26
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:
@@ -30,23 +24,23 @@ jobs:
runs-on: ubuntu-latest
steps:
- name: Check Out Release Verification Tests
uses: actions/checkout@v6
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@v6
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@v5
uses: actions/setup-java@v4
with:
distribution: 'liberica'
java-version: 17
- name: Set Up Gradle
uses: gradle/actions/setup-gradle@4d9f0ba0025fe599b4ebab900eb7f3a1d93ef4c2 # v5.0.0
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
uses: actions/upload-artifact@v4
if: failure()
uses: actions/upload-artifact@v6
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 -3
View File
@@ -9,7 +9,6 @@ ivy-cache
argfile*
activemq-data/
classes/
.cursor/
# Log files
jxl.log
@@ -43,8 +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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Before

Width:  |  Height:  |  Size: 4.8 KiB

+1 -1
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@@ -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.
+3 -3
View File
@@ -1,4 +1,4 @@
# <img src="framework-docs/src/docs/spring-framework.png" width="80" height="80"> Spring Framework [![Build Status](https://github.com/spring-projects/spring-framework/actions/workflows/build-and-deploy-snapshot.yml/badge.svg?branch=main)](https://github.com/spring-projects/spring-framework/actions/workflows/build-and-deploy-snapshot.yml?query=branch%3Amain) [![Revved up by Develocity](https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A)](https://ge.spring.io/scans?search.rootProjectNames=spring)
# <img src="framework-docs/src/docs/spring-framework.png" width="80" height="80"> Spring Framework [![Build Status](https://github.com/spring-projects/spring-framework/actions/workflows/build-and-deploy-snapshot.yml/badge.svg?branch=6.1.x)](https://github.com/spring-projects/spring-framework/actions/workflows/build-and-deploy-snapshot.yml?query=branch%3A6.1.x) [![Revved up by Develocity](https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A)](https://ge.spring.io/scans?search.rootProjectNames=spring)
This is the home of the Spring Framework: the foundation for all [Spring projects](https://spring.io/projects). Collectively the Spring Framework and the family of Spring projects are often referred to simply as "Spring".
@@ -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
@@ -27,7 +27,7 @@ See the [Build from Source](https://github.com/spring-projects/spring-framework/
## Continuous Integration Builds
CI builds are defined with [GitHub Actions workflows](.github/workflows).
Information regarding CI builds can be found in the [Spring Framework Concourse pipeline](ci/README.adoc) documentation.
## Stay in Touch
+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.
+18 -10
View File
@@ -2,14 +2,13 @@ plugins {
id 'io.freefair.aspectj' version '8.4' apply false
// kotlinVersion is managed in gradle.properties
id 'org.jetbrains.kotlin.plugin.serialization' version "${kotlinVersion}" apply false
id 'org.jetbrains.dokka' version '1.9.20'
id 'org.jetbrains.dokka' version '1.8.20'
id 'com.github.ben-manes.versions' version '0.51.0'
id 'com.github.bjornvester.xjc' version '1.8.2' apply false
id 'de.undercouch.download' version '5.4.0'
id 'io.github.goooler.shadow' version '8.1.8' apply false
id 'me.champeau.jmh' version '0.7.2' apply false
id 'me.champeau.mrjar' version '0.1.1'
id "net.ltgt.errorprone" version "4.1.0" apply false
}
ext {
@@ -25,17 +24,17 @@ configure(allprojects) { project ->
repositories {
mavenCentral()
maven {
url = "https://repo.spring.io/milestone"
url "https://repo.spring.io/milestone"
content {
// Netty 5 optional support
includeGroup 'io.projectreactor.netty'
}
}
if (version.contains('-')) {
maven { url = "https://repo.spring.io/milestone" }
maven { url "https://repo.spring.io/milestone" }
}
if (version.endsWith('-SNAPSHOT')) {
maven { url = "https://repo.spring.io/snapshot" }
maven { url "https://repo.spring.io/snapshot" }
}
}
configurations.all {
@@ -68,13 +67,17 @@ configure([rootProject] + javaProjects) { project ->
apply from: "${rootDir}/gradle/ide.gradle"
dependencies {
testImplementation("org.junit.jupiter:junit-jupiter")
testImplementation("org.junit.platform:junit-platform-suite")
testImplementation("org.junit.jupiter:junit-jupiter-api")
testImplementation("org.junit.jupiter:junit-jupiter-params")
testImplementation("org.junit.platform:junit-platform-suite-api")
testImplementation("org.mockito:mockito-core")
testImplementation("org.mockito:mockito-junit-jupiter")
testImplementation("io.mockk:mockk")
testImplementation("org.assertj:assertj-core")
// Pull in the latest JUnit 5 Launcher API to ensure proper support in IDEs.
testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
testRuntimeOnly("org.junit.platform:junit-platform-launcher")
testRuntimeOnly("org.junit.platform:junit-platform-suite-engine")
testRuntimeOnly("org.apache.logging.log4j:log4j-core")
testRuntimeOnly("org.apache.logging.log4j:log4j-jul")
testRuntimeOnly("org.apache.logging.log4j:log4j-slf4j2-impl")
@@ -86,15 +89,20 @@ configure([rootProject] + javaProjects) { project ->
ext.javadocLinks = [
"https://docs.oracle.com/en/java/javase/17/docs/api/",
"https://jakarta.ee/specifications/platform/9/apidocs/",
"https://docs.hibernate.org/orm/5.6/javadocs/",
"https://docs.jboss.org/hibernate/orm/5.6/javadocs/",
"https://eclipse.dev/aspectj/doc/released/aspectj5rt-api",
"https://www.quartz-scheduler.org/api/2.3.0/",
"https://fasterxml.github.io/jackson-core/javadoc/2.14/",
"https://fasterxml.github.io/jackson-databind/javadoc/2.14/",
"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.14/",
//"https://hc.apache.org/httpcomponents-client-5.5.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/",
"https://www.reactive-streams.org/reactive-streams-1.0.4-javadoc/",
// TODO Uncomment link to JUnit 5 docs once we execute Gradle with Java 18+.
// See https://github.com/spring-projects/spring-framework/issues/27497
//
// "https://junit.org/junit5/docs/5.10.2/api/",
"https://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/",
// Previously there could be a split-package issue between JSR250 and JSR305 javax.annotation packages,
+1 -1
View File
@@ -6,7 +6,7 @@
<module name="io.spring.javaformat.checkstyle.check.SpringHeaderCheck">
<property name="fileExtensions" value="java"/>
<property name="headerType" value="apache2"/>
<property name="headerCopyrightPattern" value="20\d\d-present"/>
<property name="headerCopyrightPattern" value="20\d\d-20\d\d"/>
<property name="packageInfoHeaderType" value="none"/>
</module>
<module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck"/>
+1 -1
View File
@@ -1,2 +1,2 @@
org.gradle.caching=true
javaFormatVersion=0.0.43
javaFormatVersion=0.0.42
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present 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("10.26.1");
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();
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present 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.
@@ -21,8 +21,6 @@ import java.util.Map;
import org.gradle.api.Project;
import org.gradle.api.plugins.JavaBasePlugin;
import org.gradle.api.tasks.testing.Test;
import org.gradle.api.tasks.testing.TestFrameworkOptions;
import org.gradle.api.tasks.testing.junitplatform.JUnitPlatformOptions;
import org.gradle.testretry.TestRetryPlugin;
import org.gradle.testretry.TestRetryTaskExtension;
@@ -36,7 +34,6 @@ import org.gradle.testretry.TestRetryTaskExtension;
*
* @author Brian Clozel
* @author Andy Wilkinson
* @author Sam Brannen
*/
class TestConventions {
@@ -53,12 +50,7 @@ class TestConventions {
}
private void configureTests(Project project, Test test) {
TestFrameworkOptions existingOptions = test.getOptions();
test.useJUnitPlatform(options -> {
if (existingOptions instanceof JUnitPlatformOptions junitPlatformOptions) {
options.copyFrom(junitPlatformOptions);
}
});
test.useJUnitPlatform();
test.include("**/*Tests.class", "**/*Test.class");
test.setSystemProperties(Map.of(
"java.awt.headless", "true",
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -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"));
});
}
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -1,5 +1,5 @@
/*
* Copyright 2002-present the original author or authors.
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
+5 -7
View File
@@ -1,6 +1,6 @@
plugins {
id 'java-platform'
id 'io.freefair.aggregate-javadoc' version '8.13.1'
id 'io.freefair.aggregate-javadoc' version '8.3'
}
description = "Spring Framework API Docs"
@@ -9,7 +9,7 @@ apply from: "${rootDir}/gradle/publications.gradle"
repositories {
maven {
url = "https://repo.spring.io/release"
url "https://repo.spring.io/release"
}
}
@@ -21,7 +21,6 @@ dependencies {
javadoc {
title = "${rootProject.description} ${version} API"
failOnError = true
options {
encoding = "UTF-8"
memberLevel = JavadocMemberLevel.PROTECTED
@@ -32,9 +31,8 @@ javadoc {
destinationDir = project.java.docsDir.dir("javadoc-api").get().asFile
splitIndex = true
links(rootProject.ext.javadocLinks)
// Check for 'syntax' and 'reference' during linting.
addBooleanOption('Xdoclint:syntax,reference', true)
addBooleanOption('Werror', true) // fail build on Javadoc warnings
addBooleanOption('Xdoclint:syntax,reference', true) // only check syntax and reference with doclint
addBooleanOption('Werror', true) // fail build on Javadoc warnings
}
maxMemory = "1024m"
doFirst {
@@ -89,7 +87,7 @@ tasks.register('schemaZip', Zip) {
archiveClassifier.set("schema")
description = "Builds -${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();
+3 -5
View File
@@ -13,10 +13,8 @@ content:
- url: https://github.com/spring-projects/spring-framework
# Refname matching:
# https://docs.antora.org/antora/latest/playbook/content-refname-matching/
# branches: We include snapshots for main, 6.2.x, and 7.0.x to 9.*.x.
branches: ['main', '6.2.x', '{7..9}.+({0..9}).x']
# tags: include all releases from 6.2.0 to 9.*.*.
tags: ['v6.2.+({0..9})', 'v{7..9}.+({0..9}).+({0..9})?(-{RC,M}*)']
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:
extensions:
@@ -38,4 +36,4 @@ runtime:
failure_level: warn
ui:
bundle:
url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.26/ui-bundle.zip
url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.16/ui-bundle.zip
+2 -5
View File
@@ -6,7 +6,7 @@ nav:
ext:
collector:
run:
command: gradlew -q -PbuildSrc.skipTests=true "-Dorg.gradle.jvmargs=-Xmx3g" :framework-docs:generateAntoraResources
command: gradlew -q -PbuildSrc.skipTests=true "-Dorg.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError" :framework-docs:generateAntoraResources
local: true
scan:
dir: ./build/generated-antora-resources
@@ -21,7 +21,6 @@ asciidoc:
table-stripes: 'odd'
include-java: 'example$docs-src/main/java/org/springframework/docs'
include-kotlin: 'example$docs-src/main/kotlin/org/springframework/docs'
include-xml: 'example$docs-src/main/resources/org/springframework/docs'
spring-site: 'https://spring.io'
spring-site-blog: '{spring-site}/blog'
spring-site-cve: "{spring-site}/security"
@@ -42,8 +41,7 @@ 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 +73,6 @@ 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'
+12 -29
View File
@@ -37,39 +37,22 @@ 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-context"))
api(project(":spring-jdbc"))
api(project(":spring-jms"))
api(project(":spring-web"))
api(project(":spring-webflux"))
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.oracle.database.jdbc:ojdbc11")
api("jakarta.jms:jakarta.jms-api")
api("jakarta.servlet:jakarta.servlet-api")
api("org.jetbrains.kotlin:kotlin-stdlib")
implementation(project(":spring-core-test"))
implementation("org.assertj:assertj-core")
implementation("org.eclipse.jetty.websocket:jetty-websocket-jetty-api")
implementation("org.jetbrains.kotlin:kotlin-stdlib")
implementation("org.junit.jupiter:junit-jupiter-api")
}
+83 -97
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[]
@@ -107,6 +106,87 @@
*** xref:core/appendix/xsd-schemas.adoc[]
*** xref:core/appendix/xml-custom.adoc[]
*** xref:core/appendix/application-startup-steps.adoc[]
* xref:testing.adoc[]
** xref:testing/introduction.adoc[]
** xref:testing/unit.adoc[]
** xref:testing/integration.adoc[]
** xref:testing/support-jdbc.adoc[]
** xref:testing/testcontext-framework.adoc[]
*** xref:testing/testcontext-framework/key-abstractions.adoc[]
*** xref:testing/testcontext-framework/bootstrapping.adoc[]
*** xref:testing/testcontext-framework/tel-config.adoc[]
*** xref:testing/testcontext-framework/application-events.adoc[]
*** xref:testing/testcontext-framework/test-execution-events.adoc[]
*** xref:testing/testcontext-framework/ctx-management.adoc[]
**** xref:testing/testcontext-framework/ctx-management/xml.adoc[]
**** xref:testing/testcontext-framework/ctx-management/groovy.adoc[]
**** xref:testing/testcontext-framework/ctx-management/javaconfig.adoc[]
**** xref:testing/testcontext-framework/ctx-management/mixed-config.adoc[]
**** xref:testing/testcontext-framework/ctx-management/context-customizers.adoc[]
**** xref:testing/testcontext-framework/ctx-management/initializers.adoc[]
**** xref:testing/testcontext-framework/ctx-management/inheritance.adoc[]
**** xref:testing/testcontext-framework/ctx-management/env-profiles.adoc[]
**** xref:testing/testcontext-framework/ctx-management/property-sources.adoc[]
**** xref:testing/testcontext-framework/ctx-management/dynamic-property-sources.adoc[]
**** xref:testing/testcontext-framework/ctx-management/web.adoc[]
**** xref:testing/testcontext-framework/ctx-management/web-mocks.adoc[]
**** xref:testing/testcontext-framework/ctx-management/caching.adoc[]
**** xref:testing/testcontext-framework/ctx-management/failure-threshold.adoc[]
**** xref:testing/testcontext-framework/ctx-management/hierarchies.adoc[]
*** xref:testing/testcontext-framework/fixture-di.adoc[]
*** xref:testing/testcontext-framework/web-scoped-beans.adoc[]
*** xref:testing/testcontext-framework/tx.adoc[]
*** xref:testing/testcontext-framework/executing-sql.adoc[]
*** xref:testing/testcontext-framework/parallel-test-execution.adoc[]
*** xref:testing/testcontext-framework/support-classes.adoc[]
*** xref:testing/testcontext-framework/aot.adoc[]
** xref:testing/webtestclient.adoc[]
** xref:testing/spring-mvc-test-framework.adoc[]
*** xref:testing/spring-mvc-test-framework/server.adoc[]
*** xref:testing/spring-mvc-test-framework/server-static-imports.adoc[]
*** xref:testing/spring-mvc-test-framework/server-setup-options.adoc[]
*** xref:testing/spring-mvc-test-framework/server-setup-steps.adoc[]
*** xref:testing/spring-mvc-test-framework/server-performing-requests.adoc[]
*** xref:testing/spring-mvc-test-framework/server-defining-expectations.adoc[]
*** xref:testing/spring-mvc-test-framework/async-requests.adoc[]
*** xref:testing/spring-mvc-test-framework/vs-streaming-response.adoc[]
*** xref:testing/spring-mvc-test-framework/server-filters.adoc[]
*** xref:testing/spring-mvc-test-framework/vs-end-to-end-integration-tests.adoc[]
*** xref:testing/spring-mvc-test-framework/server-resources.adoc[]
*** xref:testing/spring-mvc-test-framework/server-htmlunit.adoc[]
**** xref:testing/spring-mvc-test-framework/server-htmlunit/why.adoc[]
**** xref:testing/spring-mvc-test-framework/server-htmlunit/mah.adoc[]
**** xref:testing/spring-mvc-test-framework/server-htmlunit/webdriver.adoc[]
**** xref:testing/spring-mvc-test-framework/server-htmlunit/geb.adoc[]
** xref:testing/spring-mvc-test-client.adoc[]
** xref:testing/appendix.adoc[]
*** xref:testing/annotations.adoc[]
**** xref:testing/annotations/integration-standard.adoc[]
**** xref:testing/annotations/integration-spring.adoc[]
***** xref:testing/annotations/integration-spring/annotation-bootstrapwith.adoc[]
***** xref:testing/annotations/integration-spring/annotation-contextconfiguration.adoc[]
***** xref:testing/annotations/integration-spring/annotation-webappconfiguration.adoc[]
***** xref:testing/annotations/integration-spring/annotation-contexthierarchy.adoc[]
***** xref:testing/annotations/integration-spring/annotation-contextcustomizerfactories.adoc[]
***** xref:testing/annotations/integration-spring/annotation-activeprofiles.adoc[]
***** xref:testing/annotations/integration-spring/annotation-testpropertysource.adoc[]
***** xref:testing/annotations/integration-spring/annotation-dynamicpropertysource.adoc[]
***** xref:testing/annotations/integration-spring/annotation-dirtiescontext.adoc[]
***** xref:testing/annotations/integration-spring/annotation-testexecutionlisteners.adoc[]
***** xref:testing/annotations/integration-spring/annotation-recordapplicationevents.adoc[]
***** xref:testing/annotations/integration-spring/annotation-commit.adoc[]
***** xref:testing/annotations/integration-spring/annotation-rollback.adoc[]
***** xref:testing/annotations/integration-spring/annotation-beforetransaction.adoc[]
***** xref:testing/annotations/integration-spring/annotation-aftertransaction.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sql.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sqlconfig.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sqlmergemode.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sqlgroup.adoc[]
***** xref:testing/annotations/integration-spring/annotation-disabledinaotmode.adoc[]
**** xref:testing/annotations/integration-junit4.adoc[]
**** xref:testing/annotations/integration-junit-jupiter.adoc[]
**** xref:testing/annotations/integration-meta.adoc[]
*** xref:testing/resources.adoc[]
* xref:data-access.adoc[]
** xref:data-access/transaction.adoc[]
*** xref:data-access/transaction/motivation.adoc[]
@@ -165,7 +245,6 @@
**** xref:web/webmvc/mvc-servlet/multipart.adoc[]
**** xref:web/webmvc/mvc-servlet/logging.adoc[]
*** xref:web/webmvc/filters.adoc[]
*** xref:web/webmvc/message-converters.adoc[]
*** xref:web/webmvc/mvc-controller.adoc[]
**** xref:web/webmvc/mvc-controller/ann.adoc[]
**** xref:web/webmvc/mvc-controller/ann-requestmapping.adoc[]
@@ -206,7 +285,6 @@
**** xref:web/webmvc-view/mvc-freemarker.adoc[]
**** xref:web/webmvc-view/mvc-groovymarkup.adoc[]
**** xref:web/webmvc-view/mvc-script.adoc[]
**** xref:web/webmvc-view/mvc-fragments.adoc[]
**** xref:web/webmvc-view/mvc-jsp.adoc[]
**** xref:web/webmvc-view/mvc-feeds.adoc[]
**** xref:web/webmvc-view/mvc-document.adoc[]
@@ -314,97 +392,6 @@
** xref:web/webflux-test.adoc[]
** xref:rsocket.adoc[]
** xref:web/webflux-reactive-libraries.adoc[]
* xref:testing.adoc[]
** xref:testing/introduction.adoc[]
** xref:testing/unit.adoc[]
** xref:testing/integration.adoc[]
** xref:testing/support-jdbc.adoc[]
** xref:testing/testcontext-framework.adoc[]
*** xref:testing/testcontext-framework/key-abstractions.adoc[]
*** xref:testing/testcontext-framework/bootstrapping.adoc[]
*** xref:testing/testcontext-framework/tel-config.adoc[]
*** xref:testing/testcontext-framework/application-events.adoc[]
*** xref:testing/testcontext-framework/test-execution-events.adoc[]
*** xref:testing/testcontext-framework/ctx-management.adoc[]
**** xref:testing/testcontext-framework/ctx-management/javaconfig.adoc[]
**** xref:testing/testcontext-framework/ctx-management/xml.adoc[]
**** xref:testing/testcontext-framework/ctx-management/groovy.adoc[]
**** xref:testing/testcontext-framework/ctx-management/mixed-config.adoc[]
**** xref:testing/testcontext-framework/ctx-management/context-customizers.adoc[]
**** xref:testing/testcontext-framework/ctx-management/initializers.adoc[]
**** xref:testing/testcontext-framework/ctx-management/inheritance.adoc[]
**** xref:testing/testcontext-framework/ctx-management/env-profiles.adoc[]
**** xref:testing/testcontext-framework/ctx-management/property-sources.adoc[]
**** xref:testing/testcontext-framework/ctx-management/dynamic-property-sources.adoc[]
**** xref:testing/testcontext-framework/ctx-management/web.adoc[]
**** xref:testing/testcontext-framework/ctx-management/web-mocks.adoc[]
**** xref:testing/testcontext-framework/ctx-management/caching.adoc[]
**** xref:testing/testcontext-framework/ctx-management/failure-threshold.adoc[]
**** xref:testing/testcontext-framework/ctx-management/hierarchies.adoc[]
*** xref:testing/testcontext-framework/fixture-di.adoc[]
*** xref:testing/testcontext-framework/bean-overriding.adoc[]
*** xref:testing/testcontext-framework/web-scoped-beans.adoc[]
*** xref:testing/testcontext-framework/tx.adoc[]
*** xref:testing/testcontext-framework/executing-sql.adoc[]
*** xref:testing/testcontext-framework/parallel-test-execution.adoc[]
*** xref:testing/testcontext-framework/support-classes.adoc[]
*** xref:testing/testcontext-framework/aot.adoc[]
** xref:testing/webtestclient.adoc[]
** xref:testing/mockmvc.adoc[]
*** xref:testing/mockmvc/overview.adoc[]
*** xref:testing/mockmvc/setup-options.adoc[]
*** xref:testing/mockmvc/hamcrest.adoc[]
**** xref:testing/mockmvc/hamcrest/static-imports.adoc[]
**** xref:testing/mockmvc/hamcrest/setup.adoc[]
**** xref:testing/mockmvc/hamcrest/setup-steps.adoc[]
**** xref:testing/mockmvc/hamcrest/requests.adoc[]
**** xref:testing/mockmvc/hamcrest/expectations.adoc[]
**** xref:testing/mockmvc/hamcrest/async-requests.adoc[]
**** xref:testing/mockmvc/hamcrest/vs-streaming-response.adoc[]
**** xref:testing/mockmvc/hamcrest/filters.adoc[]
*** xref:testing/mockmvc/assertj.adoc[]
**** xref:testing/mockmvc/assertj/setup.adoc[]
**** xref:testing/mockmvc/assertj/requests.adoc[]
**** xref:testing/mockmvc/assertj/assertions.adoc[]
**** xref:testing/mockmvc/assertj/integration.adoc[]
*** xref:testing/mockmvc/htmlunit.adoc[]
**** xref:testing/mockmvc/htmlunit/why.adoc[]
**** xref:testing/mockmvc/htmlunit/mah.adoc[]
**** xref:testing/mockmvc/htmlunit/webdriver.adoc[]
**** xref:testing/mockmvc/htmlunit/geb.adoc[]
*** xref:testing/mockmvc/vs-end-to-end-integration-tests.adoc[]
*** xref:testing/mockmvc/resources.adoc[]
** xref:testing/spring-mvc-test-client.adoc[]
** xref:testing/appendix.adoc[]
*** xref:testing/annotations.adoc[]
**** xref:testing/annotations/integration-standard.adoc[]
**** xref:testing/annotations/integration-spring.adoc[]
***** xref:testing/annotations/integration-spring/annotation-bootstrapwith.adoc[]
***** xref:testing/annotations/integration-spring/annotation-contextconfiguration.adoc[]
***** xref:testing/annotations/integration-spring/annotation-webappconfiguration.adoc[]
***** xref:testing/annotations/integration-spring/annotation-contexthierarchy.adoc[]
***** xref:testing/annotations/integration-spring/annotation-contextcustomizerfactories.adoc[]
***** xref:testing/annotations/integration-spring/annotation-activeprofiles.adoc[]
***** xref:testing/annotations/integration-spring/annotation-testpropertysource.adoc[]
***** xref:testing/annotations/integration-spring/annotation-dynamicpropertysource.adoc[]
***** xref:testing/annotations/integration-spring/annotation-testbean.adoc[]
***** xref:testing/annotations/integration-spring/annotation-mockitobean.adoc[]
***** xref:testing/annotations/integration-spring/annotation-dirtiescontext.adoc[]
***** xref:testing/annotations/integration-spring/annotation-testexecutionlisteners.adoc[]
***** xref:testing/annotations/integration-spring/annotation-recordapplicationevents.adoc[]
***** xref:testing/annotations/integration-spring/annotation-commit.adoc[]
***** xref:testing/annotations/integration-spring/annotation-rollback.adoc[]
***** xref:testing/annotations/integration-spring/annotation-beforetransaction.adoc[]
***** xref:testing/annotations/integration-spring/annotation-aftertransaction.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sql.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sqlconfig.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sqlmergemode.adoc[]
***** xref:testing/annotations/integration-spring/annotation-sqlgroup.adoc[]
***** xref:testing/annotations/integration-spring/annotation-disabledinaotmode.adoc[]
**** xref:testing/annotations/integration-junit4.adoc[]
**** xref:testing/annotations/integration-junit-jupiter.adoc[]
**** xref:testing/annotations/integration-meta.adoc[]
*** xref:testing/resources.adoc[]
* xref:integration.adoc[]
** xref:integration/rest-clients.adoc[]
** xref:integration/jms.adoc[]
@@ -452,6 +439,5 @@
** 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.
@@ -92,25 +88,11 @@ 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`]
for details.
| `spring.placeholder.escapeCharacter.default`
| The default escape character for property placeholder support. If not set, `'\'` will
be used. Can be set to a custom escape character or an empty string to disable support
for an escape character. The default escape character be explicitly overridden in
`PropertySourcesPlaceholderConfigurer` and subclasses of `AbstractPropertyResolver`. See
{spring-framework-api}++/core/env/AbstractPropertyResolver.html#DEFAULT_PLACEHOLDER_ESCAPE_CHARACTER_PROPERTY_NAME++[`AbstractPropertyResolver`]
for details.
| `spring.test.aot.processing.failOnError`
| A boolean flag that controls whether errors encountered during AOT processing in the
_Spring TestContext Framework_ should result in an exception that fails the overall process.
@@ -17,3 +17,14 @@ is also provided.
AOT processing can be used to optimize your application ahead-of-time. It is typically
used for native image deployment using GraalVM.
@@ -6,3 +6,7 @@ The previous chapter described the Spring's support for AOP with @AspectJ and sc
aspect definitions. In this chapter, we discuss the lower-level Spring AOP APIs. For common
applications, we recommend the use of Spring AOP with AspectJ pointcuts as described in the
previous chapter.
@@ -4,6 +4,7 @@
Now we can examine how Spring AOP handles advice.
[[aop-api-advice-lifecycle]]
== Advice Lifecycles
@@ -21,20 +22,22 @@ the advice adds state to the proxied object.
You can use a mix of shared and per-instance advice in the same AOP proxy.
[[aop-api-advice-types]]
== Advice Types in Spring
Spring provides several advice types and is extensible to support
arbitrary advice types. This section describes the basic concepts and standard advice types.
[[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"]
----
@@ -46,8 +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:
@@ -55,30 +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
}
}
----
@@ -98,10 +101,11 @@ you are likely to want to run the aspect in another AOP framework. Note that poi
are not currently interoperable between frameworks, and the AOP Alliance does not
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()`
@@ -118,6 +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
@@ -131,7 +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 {
@@ -149,7 +157,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class CountingBeforeAdvice : MethodBeforeAdvice {
@@ -164,13 +172,14 @@ Kotlin::
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"]
@@ -180,16 +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 {
@@ -201,7 +209,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class RemoteThrowsAdvice : ThrowsAdvice {
@@ -212,15 +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 {
@@ -232,7 +240,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ServletThrowsAdviceWithArguments : ThrowsAdvice {
@@ -251,7 +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 {
@@ -267,7 +275,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class CombinedThrowsAdvice : ThrowsAdvice {
@@ -292,10 +300,11 @@ exception that is incompatible with the target method's signature!_
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"]
@@ -317,7 +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 {
@@ -336,7 +345,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class CountingAfterReturningAdvice : AfterReturningAdvice {
@@ -355,10 +364,11 @@ thrown up the interceptor chain instead of the return value.
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:
@@ -410,7 +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();
@@ -421,7 +431,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
interface Lockable {
fun lock()
@@ -470,7 +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 {
@@ -494,12 +504,13 @@ Java::
}
return super.invoke(invocation);
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class LockMixin : DelegatingIntroductionInterceptor(), Lockable {
@@ -523,6 +534,7 @@ Kotlin::
}
return super.invoke(invocation)
}
}
----
======
@@ -544,7 +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 {
@@ -556,7 +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)
----
@@ -573,3 +585,8 @@ We can apply this advisor programmatically by using the `Advised.addAdvisor()` m
(the recommended way) in XML configuration, as any other advisor. All proxy creation
choices discussed below, including "`auto proxy creators,`" correctly handle introductions
and stateful mixins.
@@ -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
@@ -142,3 +142,7 @@ case, the `Advised` `isFrozen()` method returns `true`, and any attempts to modi
advice through addition or removal results in an `AopConfigException`. The ability
to freeze the state of an advised object is useful in some cases (for example, to
prevent calling code removing a security interceptor).
@@ -14,3 +14,7 @@ It is possible to mix advisor and advice types in Spring in the same AOP proxy.
example, you could use an interception around advice, throws advice, and before advice in
one proxy configuration. Spring automatically creates the necessary interceptor
chain.
@@ -19,12 +19,14 @@ There are two ways to do this:
auto-proxy creation driven by source-level metadata attributes.
[[aop-autoproxy-choices]]
== Auto-proxy Bean Definitions
This section covers the auto-proxy creators provided by the
`org.springframework.aop.framework.autoproxy` package.
[[aop-api-autoproxy]]
=== `BeanNameAutoProxyCreator`
@@ -59,6 +61,7 @@ automatically created by the `BeanNameAutoProxyCreator`. The same advice is appl
to all matching beans. Note that, if advisors are used (rather than the interceptor in
the preceding example), the pointcuts may apply differently to different beans.
[[aop-api-autoproxy-default]]
=== `DefaultAdvisorAutoProxyCreator`
@@ -122,3 +125,7 @@ differently configured, AdvisorAutoProxyCreators in the same factory) and orderi
Advisors can implement the `org.springframework.core.Ordered` interface to ensure
correct ordering if this is an issue. The `TransactionAttributeSourceAdvisor` used in the
preceding example has a configurable order value. The default setting is unordered.
@@ -65,3 +65,7 @@ that, if you have a (parent) bean definition that you intend to use only as a te
and this definition specifies a class, you must make sure to set the `abstract`
attribute to `true`. Otherwise, the application context actually tries to
pre-instantiate it.
@@ -14,6 +14,7 @@ the pointcuts, any advice that applies, and their ordering. However, there are s
options that are preferable if you do not need such control.
[[aop-pfb-1]]
== Basics
@@ -31,6 +32,7 @@ application objects (besides the target, which should be available in any AOP
framework), benefiting from all the pluggability provided by Dependency Injection.
[[aop-pfb-2]]
== JavaBean Properties
@@ -85,6 +87,7 @@ to be applied. You can find an example of using this feature in xref:core/aop-ap
`false`.
[[aop-pfb-proxy-types]]
== JDK- and CGLIB-based proxies
@@ -134,6 +137,7 @@ interface that the target class implements to the `proxyInterfaces` property. Ho
it is significantly less work and less prone to typographical errors.
[[aop-api-proxying-intf]]
== Proxying Interfaces
@@ -192,16 +196,16 @@ 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
val person = factory.getBean("person") as Person;
----
======
@@ -259,6 +263,7 @@ However, there are times when being able to obtain the un-advised target from th
factory might actually be an advantage (for example, in certain test scenarios).
[[aop-api-proxying-class]]
== Proxying Classes
@@ -297,6 +302,7 @@ There is little performance difference between CGLIB proxies and dynamic proxies
Performance should not be a decisive consideration in this case.
[[aop-global-advisors]]
== Using "`Global`" Advisors
@@ -319,3 +325,7 @@ two global advisors:
<bean id="global_debug" class="org.springframework.aop.interceptor.DebugInterceptor"/>
<bean id="global_performance" class="org.springframework.aop.interceptor.PerformanceMonitorInterceptor"/>
----
@@ -4,6 +4,7 @@
This section describes how Spring handles the crucial pointcut concept.
[[aop-api-concepts]]
== Concepts
@@ -68,6 +69,7 @@ TIP: If possible, try to make pointcuts static, allowing the AOP framework to ca
results of pointcut evaluation when an AOP proxy is created.
[[aop-api-pointcut-ops]]
== Operations on Pointcuts
@@ -82,6 +84,7 @@ You can compose pointcuts by using the static methods in the
expressions is usually a simpler approach.
[[aop-api-pointcuts-aspectj]]
== AspectJ Expression Pointcuts
@@ -92,12 +95,14 @@ uses an AspectJ-supplied library to parse an AspectJ pointcut expression string.
See the xref:core/aop.adoc[previous chapter] for a discussion of supported AspectJ pointcut primitives.
[[aop-api-pointcuts-impls]]
== Convenience Pointcut Implementations
Spring provides several convenient pointcut implementations. You can use some of them
directly; others are intended to be subclassed in application-specific pointcuts.
[[aop-api-pointcuts-static]]
=== Static Pointcuts
@@ -123,7 +128,18 @@ the resulting pointcut is effectively the union of the specified patterns.)
The following example shows how to use `JdkRegexpMethodPointcut`:
include-code::./JdkRegexpConfiguration[tag=snippet,indent=0]
[source,xml,indent=0,subs="verbatim"]
----
<bean id="settersAndAbsquatulatePointcut"
class="org.springframework.aop.support.JdkRegexpMethodPointcut">
<property name="patterns">
<list>
<value>.*set.*</value>
<value>.*absquatulate</value>
</list>
</property>
</bean>
----
Spring provides a convenience class named `RegexpMethodPointcutAdvisor`, which lets us
also reference an `Advice` (remember that an `Advice` can be an interceptor, before advice,
@@ -131,7 +147,21 @@ throws advice, and others). Behind the scenes, Spring uses a `JdkRegexpMethodPoi
Using `RegexpMethodPointcutAdvisor` simplifies wiring, as the one bean encapsulates both
pointcut and advice, as the following example shows:
include-code::./RegexpConfiguration[tag=snippet,indent=0]
[source,xml,indent=0,subs="verbatim"]
----
<bean id="settersAndAbsquatulateAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref bean="beanNameOfAopAllianceInterceptor"/>
</property>
<property name="patterns">
<list>
<value>.*set.*</value>
<value>.*absquatulate</value>
</list>
</property>
</bean>
----
You can use `RegexpMethodPointcutAdvisor` with any `Advice` type.
@@ -141,6 +171,7 @@ You can use `RegexpMethodPointcutAdvisor` with any `Advice` type.
An important type of static pointcut is a metadata-driven pointcut. This uses the
values of metadata attributes (typically, source-level metadata).
[[aop-api-pointcuts-dynamic]]
=== Dynamic pointcuts
@@ -166,6 +197,7 @@ other dynamic pointcuts. In Java 1.4, the cost is about five times that of other
pointcuts.
[[aop-api-pointcuts-superclasses]]
== Pointcut Superclasses
@@ -180,7 +212,7 @@ 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 {
@@ -192,7 +224,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class TestStaticPointcut : StaticMethodMatcherPointcut() {
@@ -207,6 +239,7 @@ There are also superclasses for dynamic pointcuts.
You can use custom pointcuts with any advice type.
[[aop-api-pointcuts-custom]]
== Custom Pointcuts
@@ -217,3 +250,7 @@ expression language, if you can.
NOTE: Later versions of Spring may offer support for "`semantic pointcuts`" as offered by JAC --
for example, "`all methods that change instance variables in the target object.`"
@@ -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)
@@ -22,6 +22,7 @@ rather than a singleton bean definition. This allows Spring to create a new targ
instance when required.
[[aop-ts-swap]]
== Hot-swappable Target Sources
@@ -37,7 +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);
@@ -45,7 +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)
@@ -76,6 +77,7 @@ use a `TargetSource`), any `TargetSource` can be used in conjunction with
arbitrary advice.
[[aop-ts-pool]]
== Pooling Target Sources
@@ -150,7 +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());
@@ -158,7 +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)
@@ -173,6 +175,7 @@ Simpler pooling is available by using auto-proxying. You can set the `TargetSour
used by any auto-proxy creator.
[[aop-ts-prototype]]
== Prototype Target Sources
@@ -197,6 +200,7 @@ The only property is the name of the target bean. Inheritance is used in the
source, the target bean must be a prototype bean definition.
[[aop-ts-threadlocal]]
== `ThreadLocal` Target Sources
@@ -222,3 +226,7 @@ always remember to correctly set and unset (where the latter involves a call to
any case, since not unsetting it might result in problematic behavior. Spring's
`ThreadLocal` support does this for you and should always be considered in favor of using
`ThreadLocal` instances without other proper handling code.
@@ -32,3 +32,7 @@ AOP is used in the Spring Framework to:
NOTE: If you are interested only in generic declarative services or other pre-packaged
declarative middleware services such as pooling, you do not need to work directly with
Spring AOP, and can skip most of this chapter.
@@ -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)
@@ -53,3 +53,7 @@ Kotlin::
======
See the {spring-framework-api}/aop/aspectj/annotation/AspectJProxyFactory.html[javadoc] for more information.
@@ -11,3 +11,6 @@ there is no dependency on the AspectJ compiler or weaver.
NOTE: Using the AspectJ compiler and weaver enables use of the full AspectJ language and
is discussed in xref:core/aop/using-aspectj.adoc[Using AspectJ with Spring Applications].
@@ -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() && " +
@@ -923,7 +923,7 @@ Each of the distinct advice types of a particular aspect is conceptually meant t
to the join point directly. As a consequence, an `@AfterThrowing` advice method is not
supposed to receive an exception from an accompanying `@After`/`@AfterReturning` method.
Advice methods defined in the same `@Aspect` class that
As of Spring Framework 5.2.7, advice methods defined in the same `@Aspect` class that
need to run at the same join point are assigned precedence based on their advice type in
the following order, from highest to lowest precedence: `@Around`, `@Before`, `@After`,
`@AfterReturning`, `@AfterThrowing`. Note, however, that an `@After` advice method will
@@ -937,3 +937,5 @@ reflection for javac-compiled classes). Consider collapsing such advice methods
advice method per join point in each `@Aspect` class or refactor the pieces of advice into
separate `@Aspect` classes that you can order at the aspect level via `Ordered` or `@Order`.
====
@@ -8,8 +8,54 @@ determines that a bean is advised by one or more aspects, it automatically gener
a proxy for that bean to intercept method invocations and ensures that advice is run
as needed.
The @AspectJ support can be enabled with programmatic or XML configuration. In either
case, you also need to ensure that AspectJ's `org.aspectj:aspectjweaver` library is on the
classpath of your application (version 1.9 or later).
The @AspectJ support can be enabled with XML- or Java-style configuration. In either
case, you also need to ensure that AspectJ's `aspectjweaver.jar` library is on the
classpath of your application (version 1.9 or later). This library is available in the
`lib` directory of an AspectJ distribution or from the Maven Central repository.
[[aop-enable-aspectj-java]]
== Enabling @AspectJ Support with Java Configuration
To enable @AspectJ support with Java `@Configuration`, add the `@EnableAspectJAutoProxy`
annotation, as the following example shows:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Configuration
@EnableAspectJAutoProxy
public class AppConfig {
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Configuration
@EnableAspectJAutoProxy
class AppConfig
----
======
[[aop-enable-aspectj-xml]]
== Enabling @AspectJ Support with XML Configuration
To enable @AspectJ support with XML-based configuration, use the `aop:aspectj-autoproxy`
element, as the following example shows:
[source,xml,indent=0,subs="verbatim"]
----
<aop:aspectj-autoproxy/>
----
This assumes that you use schema support as described in
xref:core/appendix/xsd-schemas.adoc[XML Schema-based configuration].
See xref:core/appendix/xsd-schemas.adoc#aop[the AOP schema] for how to
import the tags in the `aop` namespace.
include-code::./ApplicationConfiguration[tag=snippet,indent=0]
@@ -9,12 +9,43 @@ minimal steps required for a not-very-useful aspect.
The first of the two examples shows a regular bean definition in the application context
that points to a bean class that is annotated with `@Aspect`:
include-code::./ApplicationConfiguration[tag=snippet,indent=0]
[source,xml,indent=0,subs="verbatim"]
----
<bean id="myAspect" class="com.xyz.NotVeryUsefulAspect">
<!-- configure properties of the aspect here -->
</bean>
----
The second of the two examples shows the `NotVeryUsefulAspect` class definition, which is
annotated with `@Aspect`:
include-code::./NotVeryUsefulAspect[tag=snippet,indent=0]
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages",fold="none"]
----
package com.xyz;
import org.aspectj.lang.annotation.Aspect;
@Aspect
public class NotVeryUsefulAspect {
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages",fold="none"]
----
package com.xyz
import org.aspectj.lang.annotation.Aspect
@Aspect
class NotVeryUsefulAspect
----
======
Aspects (classes annotated with `@Aspect`) can have methods and fields, the same as any
other class. They can also contain pointcut, advice, and introduction (inter-type)
@@ -32,3 +63,6 @@ stereotype annotation that qualifies, as per the rules of Spring's component sca
NOTE: In Spring AOP, aspects themselves cannot be the targets of advice from other
aspects. The `@Aspect` annotation on a class marks it as an aspect and, hence, excludes
it from auto-proxying.
@@ -16,10 +16,93 @@ aspect.
Because we want to retry the operation, we need to use around advice so that we can
call `proceed` multiple times. The following listing shows the basic aspect implementation:
include-code::./ConcurrentOperationExecutor[tag=snippet,indent=0]
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Aspect
public class ConcurrentOperationExecutor implements Ordered {
`@Around("com.xyz.CommonPointcuts.businessService()")` references the `businessService` named pointcut defined in
xref:core/aop/ataspectj/pointcuts.adoc#aop-common-pointcuts[Sharing Named Pointcut Definitions].
private static final int DEFAULT_MAX_RETRIES = 2;
private int maxRetries = DEFAULT_MAX_RETRIES;
private int order = 1;
public void setMaxRetries(int maxRetries) {
this.maxRetries = maxRetries;
}
public int getOrder() {
return this.order;
}
public void setOrder(int order) {
this.order = order;
}
@Around("com.xyz.CommonPointcuts.businessService()") // <1>
public Object doConcurrentOperation(ProceedingJoinPoint pjp) throws Throwable {
int numAttempts = 0;
PessimisticLockingFailureException lockFailureException;
do {
numAttempts++;
try {
return pjp.proceed();
}
catch(PessimisticLockingFailureException ex) {
lockFailureException = ex;
}
} while(numAttempts <= this.maxRetries);
throw lockFailureException;
}
}
----
<1> References the `businessService` named pointcut defined in xref:core/aop/ataspectj/pointcuts.adoc#aop-common-pointcuts[Sharing Named Pointcut Definitions].
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Aspect
class ConcurrentOperationExecutor : Ordered {
private val DEFAULT_MAX_RETRIES = 2
private var maxRetries = DEFAULT_MAX_RETRIES
private var order = 1
fun setMaxRetries(maxRetries: Int) {
this.maxRetries = maxRetries
}
override fun getOrder(): Int {
return this.order
}
fun setOrder(order: Int) {
this.order = order
}
@Around("com.xyz.CommonPointcuts.businessService()") // <1>
fun doConcurrentOperation(pjp: ProceedingJoinPoint): Any? {
var numAttempts = 0
var lockFailureException: PessimisticLockingFailureException
do {
numAttempts++
try {
return pjp.proceed()
} catch (ex: PessimisticLockingFailureException) {
lockFailureException = ex
}
} while (numAttempts <= this.maxRetries)
throw lockFailureException
}
}
----
<1> References the `businessService` named pointcut defined in xref:core/aop/ataspectj/pointcuts.adoc#aop-common-pointcuts[Sharing Named Pointcut Definitions].
======
Note that the aspect implements the `Ordered` interface so that we can set the precedence of
the aspect higher than the transaction advice (we want a fresh transaction each time we
@@ -31,15 +114,70 @@ we have exhausted all of our retry attempts.
The corresponding Spring configuration follows:
include-code::./ApplicationConfiguration[tag=snippet,indent=0]
[source,xml,indent=0,subs="verbatim"]
----
<aop:aspectj-autoproxy/>
<bean id="concurrentOperationExecutor"
class="com.xyz.service.impl.ConcurrentOperationExecutor">
<property name="maxRetries" value="3"/>
<property name="order" value="100"/>
</bean>
----
To refine the aspect so that it retries only idempotent operations, we might define the following
`Idempotent` annotation:
include-code::./service/Idempotent[tag=snippet,indent=0]
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Retention(RetentionPolicy.RUNTIME)
// marker annotation
public @interface Idempotent {
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Retention(AnnotationRetention.RUNTIME)
// marker annotation
annotation class Idempotent
----
======
We can then use the annotation to annotate the implementation of service operations. The change
to the aspect to retry only idempotent operations involves refining the pointcut
expression so that only `@Idempotent` operations match, as follows:
include-code::./service/SampleService[tag=snippet,indent=0]
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Around("execution(* com.xyz..service.*.*(..)) && " +
"@annotation(com.xyz.service.Idempotent)")
public Object doConcurrentOperation(ProceedingJoinPoint pjp) throws Throwable {
// ...
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Around("execution(* com.xyz..service.*.*(..)) && " +
"@annotation(com.xyz.service.Idempotent)")
fun doConcurrentOperation(pjp: ProceedingJoinPoint): Any? {
// ...
}
----
======
@@ -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 {
@@ -60,3 +60,6 @@ Programming Guide for more information on `per` clauses.
The `pertarget` instantiation model works in exactly the same way as `perthis`, but it
creates one aspect instance for each unique target object at matched join points.
@@ -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 {
@@ -63,15 +63,17 @@ 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")
val usageTracked = context.getBean("myService", UsageTracked.class)
----
======
@@ -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
@@ -104,7 +104,7 @@ Note that pointcut definitions are generally matched against any intercepted met
If a pointcut is strictly meant to be public-only, even in a CGLIB proxy scenario with
potential non-public interactions through proxies, it needs to be defined accordingly.
If your interception needs to include method calls or even constructors within the target
If your interception needs include method calls or even constructors within the target
class, consider the use of Spring-driven xref:core/aop/using-aspectj.adoc#aop-aj-ltw[native AspectJ weaving] instead
of Spring's proxy-based AOP framework. This constitutes a different mode of AOP usage
with different characteristics, so be sure to make yourself familiar with weaving
@@ -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
@@ -581,3 +581,6 @@ performance (time and memory used), due to extra processing and analysis. Scopin
designators are very fast to match, and using them means AspectJ can very quickly
dismiss groups of join points that should not be further processed. A good
pointcut should always include one if possible.
@@ -8,6 +8,7 @@ decisions are influenced by a number of factors including application requiremen
development tools, and team familiarity with AOP.
[[aop-spring-or-aspectj]]
== Spring AOP or Full AspectJ?
@@ -30,6 +31,7 @@ the @AspectJ style, sticking with regular Java compilation in your IDE, and addi
an aspect weaving phase to your build script.
[[aop-ataspectj-or-xml]]
== @AspectJ or XML for Spring AOP?
@@ -57,7 +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() {}
@@ -71,7 +73,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Pointcut("execution(* get*())")
fun propertyAccess() {}
@@ -105,3 +107,7 @@ Spring AOP and by AspectJ. So, if you later decide you need the capabilities of
to implement additional requirements, you can easily migrate to a classic AspectJ setup.
In general, the Spring team prefers the @AspectJ style for custom aspects beyond simple
configuration of enterprise services.
@@ -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
@@ -73,3 +73,7 @@ it from older technologies offering only interception. Pointcuts enable advice t
targeted independently of the object-oriented hierarchy. For example, you can apply an
around advice providing declarative transaction management to a set of methods that span
multiple objects (such as all business operations in the service layer).
@@ -14,5 +14,9 @@ need to advise a method that is not declared on an interface or where you need t
pass a proxied object to a method as a concrete type.
It is important to grasp the fact that Spring AOP is proxy-based. See
xref:core/aop/proxying.adoc#aop-understanding-aop-proxies[Understanding AOP Proxies]
for a thorough examination of exactly what this implementation detail actually means.
xref:core/aop/proxying.adoc#aop-understanding-aop-proxies[Understanding AOP Proxies] for a thorough examination of exactly what this
implementation detail actually means.
@@ -52,6 +52,10 @@ configuration-style approach. The fact that this chapter chooses to introduce th
@AspectJ-style approach first should not be taken as an indication that the Spring team
favors the @AspectJ annotation-style approach over the Spring XML configuration-style.
See xref:core/aop/choosing.adoc[Choosing which AOP Declaration Style to Use] for a more
complete discussion of the advantages and disadvantages of each style.
See xref:core/aop/choosing.adoc[Choosing which AOP Declaration Style to Use] for a more complete discussion of the advantages and disadvantages of
each style.
====
@@ -6,3 +6,7 @@ It is perfectly possible to mix @AspectJ style aspects by using the auto-proxyin
schema-defined `<aop:aspect>` aspects, `<aop:advisor>` declared advisors, and even proxies
and interceptors in other styles in the same configuration. All of these are implemented
by using the same underlying support mechanism and can co-exist without any difficulty.
@@ -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
@@ -61,6 +57,7 @@ proxies _for all three of them_.
====
[[aop-understanding-aop-proxies]]
== Understanding AOP Proxies
@@ -68,14 +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 {
@@ -92,7 +90,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
class SimplePojo : Pojo {
@@ -117,7 +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 {
@@ -131,7 +129,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun main() {
val pojo = SimplePojo()
@@ -150,7 +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 {
@@ -168,7 +166,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun main() {
val factory = ProxyFactory(SimplePojo())
@@ -189,35 +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();
}
@@ -229,12 +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()
}
@@ -245,16 +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 {
@@ -273,7 +262,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun main() {
val factory = ProxyFactory(SimplePojo())
@@ -288,5 +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.
@@ -26,6 +26,7 @@ use either only the `<aop:config>` style or only the `AutoProxyCreator` style an
never mix them.
[[aop-schema-declaring-an-aspect]]
== Declaring an Aspect
@@ -53,6 +54,7 @@ The bean that backs the aspect (`aBean` in this case) can of course be configure
dependency injected just like any other Spring bean.
[[aop-schema-pointcuts]]
== Declaring a Pointcut
@@ -134,7 +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) {
// ...
@@ -143,7 +145,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun monitor(service: Any) {
// ...
@@ -175,7 +177,9 @@ follows:
Note that pointcuts defined in this way are referred to by their XML `id` and cannot be
used as named pointcuts to form composite pointcuts. The named pointcut support in the
schema-based definition style is thus more limited than that offered by the @AspectJ style.
schema-based definition style is thus more limited than that offered by the @AspectJ
style.
[[aop-schema-advice]]
@@ -184,6 +188,7 @@ schema-based definition style is thus more limited than that offered by the @Asp
The schema-based AOP support uses the same five kinds of advice as the @AspectJ style, and they have
exactly the same semantics.
[[aop-schema-advice-before]]
=== Before Advice
@@ -232,6 +237,7 @@ that contains the advice. Before a data access operation is performed (a method
join point matched by the pointcut expression), the `doAccessCheck` method on the aspect
bean is invoked.
[[aop-schema-advice-after-returning]]
=== After Returning Advice
@@ -276,19 +282,20 @@ 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) {...
----
======
[[aop-schema-advice-after-throwing]]
=== After Throwing Advice
@@ -333,19 +340,20 @@ 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) {...
----
======
[[aop-schema-advice-after-finally]]
=== After (Finally) Advice
@@ -364,6 +372,7 @@ You can declare it by using the `after` element, as the following example shows:
</aop:aspect>
----
[[aop-schema-advice-around]]
=== Around Advice
@@ -412,7 +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
@@ -424,7 +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
@@ -435,18 +444,17 @@ Kotlin::
----
======
[[aop-schema-params]]
=== Advice Parameters
The schema-based declaration style supports fully typed advice in the same way as
described for the @AspectJ support -- by matching pointcut parameters by name against
advice method parameters. See
xref:core/aop/ataspectj/advice.adoc#aop-ataspectj-advice-params[Advice Parameters] for details.
If you wish to explicitly specify argument names for the advice methods (not relying on the
advice method parameters. See xref:core/aop/ataspectj/advice.adoc#aop-ataspectj-advice-params[Advice Parameters] for details. If you wish
to explicitly specify argument names for the advice methods (not relying on the
detection strategies previously described), you can do so by using the `arg-names`
attribute of the advice element, which is treated in the same manner as the `argNames`
attribute in an advice annotation (as described in
xref:core/aop/ataspectj/advice.adoc#aop-ataspectj-advice-params-names[Determining Argument Names]).
attribute in an advice annotation (as described in xref:core/aop/ataspectj/advice.adoc#aop-ataspectj-advice-params-names[Determining Argument Names]).
The following example shows how to specify an argument name in XML:
[source,xml,indent=0,subs="verbatim"]
@@ -456,8 +464,7 @@ The following example shows how to specify an argument name in XML:
method="audit"
arg-names="auditable" />
----
<1> References the `publicMethod` named pointcut defined in
xref:core/aop/ataspectj/pointcuts.adoc#aop-pointcuts-combining[Combining Pointcut Expressions].
<1> References the `publicMethod` named pointcut defined in xref:core/aop/ataspectj/pointcuts.adoc#aop-pointcuts-combining[Combining Pointcut Expressions].
The `arg-names` attribute accepts a comma-delimited list of parameter names.
@@ -468,7 +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;
@@ -487,7 +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
@@ -514,7 +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;
@@ -538,7 +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
@@ -603,7 +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 {
@@ -617,7 +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")
@@ -638,15 +645,15 @@ ms % Task name
00000 ? execution(getFoo)
----
[[aop-ordering]]
=== Advice Ordering
When multiple pieces of advice need to run at the same join point (executing method)
the ordering rules are as described in
xref:core/aop/ataspectj/advice.adoc#aop-ataspectj-advice-ordering[Advice Ordering]. The
precedence between aspects is determined via the `order` attribute in the `<aop:aspect>`
element or by either adding the `@Order` annotation to the bean that backs the aspect
or by having the bean implement the `Ordered` interface.
the ordering rules are as described in xref:core/aop/ataspectj/advice.adoc#aop-ataspectj-advice-ordering[Advice Ordering]. The precedence
between aspects is determined via the `order` attribute in the `<aop:aspect>` element or
by either adding the `@Order` annotation to the bean that backs the aspect or by having
the bean implement the `Ordered` interface.
[NOTE]
====
@@ -669,6 +676,7 @@ at the aspect level.
====
[[aop-schema-introductions]]
== Introductions
@@ -706,7 +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();
@@ -715,7 +723,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
fun recordUsage(usageTracked: UsageTracked) {
usageTracked.incrementUseCount()
@@ -734,20 +742,21 @@ 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)
----
======
[[aop-schema-instantiation-models]]
== Aspect Instantiation Models
@@ -755,6 +764,7 @@ The only supported instantiation model for schema-defined aspects is the singlet
model. Other instantiation models may be supported in future releases.
[[aop-schema-advisors]]
== Advisors
@@ -762,8 +772,7 @@ The concept of "advisors" comes from the AOP support defined in Spring
and does not have a direct equivalent in AspectJ. An advisor is like a small
self-contained aspect that has a single piece of advice. The advice itself is
represented by a bean and must implement one of the advice interfaces described in
xref:core/aop-api/advice.adoc#aop-api-advice-types[Advice Types in Spring].
Advisors can take advantage of AspectJ pointcut expressions.
xref:core/aop-api/advice.adoc#aop-api-advice-types[Advice Types in Spring]. Advisors can take advantage of AspectJ pointcut expressions.
Spring supports the advisor concept with the `<aop:advisor>` element. You most
commonly see it used in conjunction with transactional advice, which also has its own
@@ -796,6 +805,7 @@ To define the precedence of an advisor so that the advice can participate in ord
use the `order` attribute to define the `Ordered` value of the advisor.
[[aop-schema-example]]
== An AOP Schema Example
@@ -819,7 +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 {
@@ -859,7 +869,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
class ConcurrentOperationExecutor : Ordered {
@@ -943,7 +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
@@ -953,7 +963,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim"]
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Retention(AnnotationRetention.RUNTIME)
// marker annotation
@@ -971,3 +981,7 @@ pointcut expression so that only `@Idempotent` operations match, as follows:
expression="execution(* com.xyz.service.*.*(..)) and
@annotation(com.xyz.service.Idempotent)"/>
----
@@ -8,14 +8,12 @@ alone.
Spring ships with a small AspectJ aspect library, which is available stand-alone in your
distribution as `spring-aspects.jar`. You need to add this to your classpath in order
to use the aspects in it.
xref:core/aop/using-aspectj.adoc#aop-atconfigurable[Using AspectJ to Dependency Inject Domain Objects with Spring]
and xref:core/aop/using-aspectj.adoc#aop-ajlib-other[Other Spring aspects for AspectJ]
discuss the content of this library and how you can use it.
xref:core/aop/using-aspectj.adoc#aop-aj-configure[Configuring AspectJ Aspects by Using Spring IoC]
discusses how to dependency inject AspectJ aspects that are woven using the AspectJ compiler. Finally,
xref:core/aop/using-aspectj.adoc#aop-aj-ltw[Load-time Weaving with AspectJ in the Spring Framework]
provides an introduction to load-time weaving for Spring applications that use AspectJ.
to use the aspects in it. xref:core/aop/using-aspectj.adoc#aop-atconfigurable[Using AspectJ to Dependency Inject Domain Objects with Spring] and xref:core/aop/using-aspectj.adoc#aop-ajlib-other[Other Spring aspects for AspectJ] discuss the
content of this library and how you can use it. xref:core/aop/using-aspectj.adoc#aop-aj-configure[Configuring AspectJ Aspects by Using Spring IoC] discusses how to
dependency inject AspectJ aspects that are woven using the AspectJ compiler. Finally,
xref:core/aop/using-aspectj.adoc#aop-aj-ltw[Load-time Weaving with AspectJ in the Spring Framework] provides an introduction to load-time weaving for Spring applications
that use AspectJ.
[[aop-atconfigurable]]
@@ -38,7 +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;
@@ -52,7 +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
@@ -68,7 +66,7 @@ Kotlin::
When used as a marker interface in this way, Spring configures new instances of the
annotated type (`Account`, in this case) by using a bean definition (typically
prototype-scoped) with the same name as the fully-qualified type name
(`com.xyz.domain.Account`). Since the default name for a bean defined via XML is the
(`com.xyz.domain.Account`). Since the default name for a bean is the
fully-qualified name of its type, a convenient way to declare the prototype definition
is to omit the `id` attribute, as the following example shows:
@@ -86,7 +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;
@@ -100,7 +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
@@ -155,14 +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)
----
@@ -179,10 +177,41 @@ either use a build-time Ant or Maven task to do this (see, for example, the
{aspectj-docs-devguide}/antTasks.html[AspectJ Development
Environment Guide]) or load-time weaving (see xref:core/aop/using-aspectj.adoc#aop-aj-ltw[Load-time Weaving with AspectJ in the Spring Framework]). The
`AnnotationBeanConfigurerAspect` itself needs to be configured by Spring (in order to obtain
a reference to the bean factory that is to be used to configure new objects). You can define
the related configuration as follows:
a reference to the bean factory that is to be used to configure new objects). If you
use Java-based configuration, you can add `@EnableSpringConfigured` to any
`@Configuration` class, as follows:
include-code::./ApplicationConfiguration[tag=snippet,indent=0]
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Configuration
@EnableSpringConfigured
public class AppConfig {
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Configuration
@EnableSpringConfigured
class AppConfig {
}
----
======
If you prefer XML based configuration, the Spring
xref:core/appendix/xsd-schemas.adoc#context[`context` namespace]
defines a convenient `context:spring-configured` element, which you can use as follows:
[source,xml,indent=0,subs="verbatim"]
----
<context:spring-configured/>
----
Instances of `@Configurable` objects created before the aspect has been configured
result in a message being issued to the debug log and no configuration of the
@@ -208,6 +237,7 @@ not use `@Configurable` on bean classes that are registered as regular Spring be
with the container. Doing so results in double initialization, once through the
container and once through the aspect.
[[aop-configurable-testing]]
=== Unit Testing `@Configurable` Objects
@@ -220,6 +250,7 @@ you can still unit test outside of the container as normal, but you see a warnin
message each time that you construct a `@Configurable` object indicating that it has
not been configured by Spring.
[[aop-configurable-container]]
=== Working with Multiple Application Contexts
@@ -249,6 +280,7 @@ is added only to the container-wide classpath (and hence loaded by the shared pa
not what you want).
[[aop-ajlib-other]]
== Other Spring aspects for AspectJ
@@ -301,6 +333,7 @@ fully qualified class names:
----
[[aop-aj-configure]]
== Configuring AspectJ Aspects by Using Spring IoC
@@ -355,6 +388,7 @@ results in the creation of Spring AOP proxies. The @AspectJ style of aspect
declaration is being used here, but the AspectJ runtime is not involved.
[[aop-aj-ltw]]
== Load-time Weaving with AspectJ in the Spring Framework
@@ -386,7 +420,8 @@ 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]]
=== A First Example
@@ -409,7 +444,7 @@ 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;
@@ -442,7 +477,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
@@ -540,7 +575,7 @@ 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;
@@ -562,7 +597,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
@@ -621,7 +656,7 @@ result:
======
Java::
+
[source,java,indent=0,subs="verbatim",chomp="-packages"]
[source,java,indent=0,subs="verbatim",role="primary",chomp="-packages"]
----
package com.xyz;
@@ -643,7 +678,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",chomp="-packages"]
[source,kotlin,indent=0,subs="verbatim",role="secondary",chomp="-packages"]
----
package com.xyz
@@ -673,6 +708,7 @@ nice example of a development-time aspect that developers can use during develop
and then easily exclude from builds of the application being deployed
into UAT or production.
[[aop-aj-ltw-the-aspects]]
=== Aspects
@@ -681,6 +717,7 @@ either the AspectJ language itself, or you can write your aspects in the @Aspect
Your aspects are then both valid AspectJ and Spring AOP aspects.
Furthermore, the compiled aspect classes need to be available on the classpath.
[[aop-aj-ltw-aop_dot_xml]]
=== `META-INF/aop.xml`
@@ -710,6 +747,7 @@ The structure and contents of this file is detailed in the LTW part of the
{aspectj-docs-devguide}/ltw-configuration.html[AspectJ reference
documentation]. Because the `aop.xml` file is 100% AspectJ, we do not describe it further here.
[[aop-aj-ltw-libraries]]
=== Required libraries (JARS)
@@ -724,6 +762,7 @@ If you use the xref:core/aop/using-aspectj.adoc#aop-aj-ltw-environments-generic[
* `spring-instrument.jar`
[[aop-aj-ltw-spring]]
=== Spring Configuration
@@ -744,9 +783,52 @@ adding one line. (Note that you almost certainly need to use an
`ApplicationContext` as your Spring container -- typically, a `BeanFactory` is not
enough because the LTW support uses `BeanFactoryPostProcessors`.)
To enable the Spring Framework's LTW support, you need to configure a `LoadTimeWeaver` as follows:
To enable the Spring Framework's LTW support, you need to configure a `LoadTimeWeaver`,
which typically is done by using the `@EnableLoadTimeWeaving` annotation, as follows:
include-code::./ApplicationConfiguration[tag=snippet,indent=0]
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Configuration
@EnableLoadTimeWeaving
public class AppConfig {
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Configuration
@EnableLoadTimeWeaving
class AppConfig {
}
----
======
Alternatively, if you prefer XML-based configuration, use the
`<context:load-time-weaver/>` element. Note that the element is defined in the
`context` namespace. The following example shows how to use `<context:load-time-weaver/>`:
[source,xml,indent=0,subs="verbatim"]
----
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<context:load-time-weaver/>
</beans>
----
The preceding configuration automatically defines and registers a number of LTW-specific
infrastructure beans, such as a `LoadTimeWeaver` and an `AspectJWeavingEnabler`, for you.
@@ -782,12 +864,63 @@ Note that the table lists only the `LoadTimeWeavers` that are autodetected when
use the `DefaultContextLoadTimeWeaver`. You can specify exactly which `LoadTimeWeaver`
implementation to use.
To configure a specific `LoadTimeWeaver`, implement the
`LoadTimeWeavingConfigurer` interface and override the `getLoadTimeWeaver()` method
(or use the XML equivalent).
To specify a specific `LoadTimeWeaver` with Java configuration, implement the
`LoadTimeWeavingConfigurer` interface and override the `getLoadTimeWeaver()` method.
The following example specifies a `ReflectiveLoadTimeWeaver`:
include-code::./CustomWeaverConfiguration[tag=snippet,indent=0]
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim",role="primary"]
----
@Configuration
@EnableLoadTimeWeaving
public class AppConfig implements LoadTimeWeavingConfigurer {
@Override
public LoadTimeWeaver getLoadTimeWeaver() {
return new ReflectiveLoadTimeWeaver();
}
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim",role="secondary"]
----
@Configuration
@EnableLoadTimeWeaving
class AppConfig : LoadTimeWeavingConfigurer {
override fun getLoadTimeWeaver(): LoadTimeWeaver {
return ReflectiveLoadTimeWeaver()
}
}
----
======
If you use XML-based configuration, you can specify the fully qualified class name
as the value of the `weaver-class` attribute on the `<context:load-time-weaver/>`
element. Again, the following example specifies a `ReflectiveLoadTimeWeaver`:
[source,xml,indent=0,subs="verbatim"]
----
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<context:load-time-weaver
weaver-class="org.springframework.instrument.classloading.ReflectiveLoadTimeWeaver"/>
</beans>
----
The `LoadTimeWeaver` that is defined and registered by the configuration can be later
retrieved from the Spring container by using the well known name, `loadTimeWeaver`.
@@ -823,6 +956,7 @@ possible values:
then AspectJ weaving is on. Otherwise, it is off. This is the default value.
|===
[[aop-aj-ltw-environments]]
=== Environment-specific Configuration
@@ -871,3 +1005,7 @@ Note that this requires modification of the JVM launch script, which may prevent
from using this in application server environments (depending on your server and your
operation policies). That said, for one-app-per-JVM deployments such as standalone
Spring Boot applications, you typically control the entire JVM setup in any case.
+70 -249
View File
@@ -5,7 +5,6 @@ This chapter covers Spring's Ahead of Time (AOT) optimizations.
For AOT support specific to integration tests, see xref:testing/testcontext-framework/aot.adoc[Ahead of Time Support for Tests].
[[aot.introduction]]
== Introduction to Ahead of Time Optimizations
@@ -18,9 +17,9 @@ Applying such optimizations early implies the following restrictions:
* The beans defined in your application cannot change at runtime, meaning:
** `@Profile`, in particular profile-specific configuration, needs to be chosen at build time and is automatically enabled at runtime when AOT is enabled.
** `Environment` properties that impact the presence of a bean (`@Conditional`) are only considered at build time.
* Bean definitions with instance suppliers (lambdas or method references) cannot be transformed ahead of time.
* Bean definitions with instance suppliers (lambdas or method references) cannot be transformed ahead-of-time.
* Beans registered as singletons (using `registerSingleton`, typically from
`ConfigurableListableBeanFactory`) cannot be transformed ahead of time either.
`ConfigurableListableBeanFactory`) cannot be transformed ahead-of-time either.
* As we cannot rely on the instance, make sure that the bean type is as precise as
possible.
@@ -36,9 +35,8 @@ A Spring AOT processed application typically generates:
NOTE: At the moment, AOT is focused on allowing Spring applications to be deployed as native images using GraalVM.
We intend to support more JVM-based use cases in future generations.
[[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`]:
@@ -53,7 +51,6 @@ The `RuntimeHints` instance can also be used to generate the relevant GraalVM na
Those steps are covered in greater detail in the sections below.
[[aot.refresh]]
== Refresh for AOT Processing
@@ -91,7 +88,6 @@ This makes sure to create any proxy that will be required at runtime.
Once this part completes, the `BeanFactory` contains the bean definitions that are necessary for the application to run. It does not trigger bean instantiation but allows the AOT engine to inspect the beans that will be created at runtime.
[[aot.bean-factory-initialization-contributions]]
== Bean Factory Initialization AOT Contributions
@@ -110,10 +106,11 @@ Consequently, such a bean is automatically excluded from the AOT-optimized conte
[NOTE]
====
If a bean implements the `BeanFactoryInitializationAotProcessor` interface, the bean and **all** of its dependencies will be initialized during AOT processing.
We generally recommend that this interface is only implemented by infrastructure beans, such as a `BeanFactoryPostProcessor`, which have limited dependencies and are already initialized early in the bean factory lifecycle.
We generally recommend that this interface is only implemented by infrastructure beans such as `BeanFactoryPostProcessor` which have limited dependencies and are already initialized early in the bean factory lifecycle.
If such a bean is registered using an `@Bean` factory method, ensure the method is `static` so that its enclosing `@Configuration` class does not have to be initialized.
====
[[aot.bean-registration-contributions]]
=== Bean Registration AOT Contributions
@@ -130,7 +127,7 @@ Typically used when the bean definition needs to be tuned for specific features
[NOTE]
====
If a bean implements the `BeanRegistrationAotProcessor` interface, the bean and **all** of its dependencies will be initialized during AOT processing.
We generally recommend that this interface is only implemented by infrastructure beans, such as a `BeanFactoryPostProcessor`, which have limited dependencies and are already initialized early in the bean factory lifecycle.
We generally recommend that this interface is only implemented by infrastructure beans such as `BeanFactoryPostProcessor` which have limited dependencies and are already initialized early in the bean factory lifecycle.
If such a bean is registered using an `@Bean` factory method, ensure the method is `static` so that its enclosing `@Configuration` class does not have to be initialized.
====
@@ -143,7 +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 {
@@ -158,7 +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 {
@@ -179,7 +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}
@@ -222,23 +219,21 @@ NOTE: The exact code generated may differ depending on the exact nature of your
TIP: Each generated class is annotated with `org.springframework.aot.generate.Generated` to
identify them if they need to be excluded, for instance by static analysis tools.
The generated code above creates bean definitions equivalent to the `@Configuration` class, but in a direct way and without the use of reflection at all if possible.
The generated code above creates bean definitions equivalent to the `@Configuration` class, but in a direct way and without the use of reflection if at all possible.
There is a bean definition for `dataSourceConfiguration` and one for `dataSourceBean`.
When a `datasource` instance is required, a `BeanInstanceSupplier` is called.
This supplier invokes the `dataSource()` method on the `dataSourceConfiguration` bean.
[[aot.running]]
== Running with AOT Optimizations
== 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 within a native image. However it is also possible to use AOT optimizations
is automatically enabled when running in this mode. It is possible to use those optimizations
on the JVM by setting the `spring.aot.enabled` System property to `true`.
NOTE: When AOT optimizations are included, some decisions that have been made at build time
are hard coded in the application setup. For instance, profiles that have been enabled at
build time are automatically enabled at runtime as well.
NOTE: When AOT optimizations are included, some decisions that have been taken at build-time
are hard-coded in the application setup. For instance, profiles that have been enabled at
build-time are automatically enabled at runtime as well.
[[aot.bestpractices]]
== Best Practices
@@ -249,7 +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
@@ -271,19 +266,19 @@ 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.
For `@Configuration` classes, make sure that the return type of an `@Bean` factory method is as precise as possible.
For `@Configuration` classes, make sure that the return type of the factory `@Bean` method is as precise as possible.
Consider the following example:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration(proxyBeanMethods = false)
public class UserConfiguration {
@@ -295,32 +290,19 @@ 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`.
During AOT processing, none of the usual post-processing will take `MyImplementation` into account.
For instance, if there is an annotated handler method on `MyImplementation` that the context should register, it will not be detected during AOT processing.
In the example above, the declared type for the `myInterface` bean is `MyInterface`.
None of the usual post-processing will take `MyImplementation` into account.
For instance, if there is an annotated handler method on `MyImplementation` that the context should register, it wont be detected upfront.
The example above should therefore be rewritten as follows:
The example above should be rewritten as follows:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Configuration(proxyBeanMethods = false)
public class UserConfiguration {
@@ -332,19 +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.
@@ -353,55 +322,41 @@ If you are registering bean definitions programmatically, consider using `RootBe
=== Avoid Multiple Constructors
The container is able to choose the most appropriate constructor to use based on several candidates.
However, relying on that is not a best practice, and flagging the preferred constructor with `@Autowired` if necessary is preferred.
However, this is not a best practice and flagging the preferred constructor with `@Autowired` if necessary is preferred.
In case you are working on a code base that you cannot modify, you can set the {spring-framework-api}/beans/factory/support/AbstractBeanDefinition.html#PREFERRED_CONSTRUCTORS_ATTRIBUTE[`preferredConstructors` attribute] on the related bean definition to indicate which constructor should be used.
[[aot.bestpractices.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$Delegate`.
To use it, register its fully-qualified name in `META-INF/spring/aot.factories` using `org.springframework.aot.generate.ValueCodeGenerator$Delegate` as the key.
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 into generated code that uses 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] which can lead to several issues with AOT:
Spring AOT detects what needs to be done to create a bean and translates that in generated code using an instance supplier.
The container also supports creating a bean with {spring-framework-api}++/beans/factory/BeanFactory.html#getBean(java.lang.String,java.lang.Object...)++[custom arguments] that leads to several issues with AOT:
. The custom arguments require dynamic introspection of a matching constructor or factory method.
Those arguments cannot be detected by AOT, so the necessary reflection hints will have to be provided manually.
. Bypassing the instance supplier means that all other optimizations after creation are skipped as well.
. By-passing the instance supplier means that all other optimizations after creation are skipped as well.
For instance, autowiring on fields and methods will be skipped as they are handled in the instance supplier.
Rather than having prototype-scoped beans created with custom arguments, we recommend a manual factory pattern where a bean is responsible for the creation of the instance.
[[aot.bestpractices.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
`FactoryBean` should be used with care as it introduces an intermediate layer in terms of bean type resolution that may not be conceptually necessary.
As a rule of thumb, if a `FactoryBean` instance does not hold long-term state and is not needed at a later point at runtime, it should be replaced by a regular `@Bean` factory method, possibly with a `FactoryBean` adapter layer on top (for declarative configuration purposes).
As a rule of thumb, if the `FactoryBean` instance does not hold long-term state and is not needed at a later point in time at runtime, it should be replaced by a regular factory method, possibly with a `FactoryBean` adapter layer on top (for declarative configuration purposes).
If your `FactoryBean` implementation does not resolve the object type (i.e. `T`), extra care is necessary.
Consider the following example:
@@ -410,21 +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:
@@ -433,7 +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 {
@@ -445,22 +391,9 @@ Java::
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
@Configuration(proxyBeanMethods = false)
class UserConfiguration {
@Bean
fun myClient() = ClientFactoryBean<MyClient>(...)
}
----
======
If a `FactoryBean` bean definition is registered programmatically, make sure to follow these steps:
If the `FactoryBean` bean definition is registered programmatically, make sure to follow these steps:
1. Use `RootBeanDefinition`.
2. Set the `beanClass` to the `FactoryBean` class so that AOT knows that it is an intermediate layer.
@@ -472,22 +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);
----
======
@@ -500,7 +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) {
@@ -510,29 +433,16 @@ 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 ensure that entity scanning occurs ahead of time, a `PersistenceManagedTypes` bean must be declared and used by the
To make sure the scanning occurs ahead of time, a `PersistenceManagedTypes` bean must be declared and used by the
factory bean definition, as shown by the following example:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Bean
PersistenceManagedTypes persistenceManagedTypes(ResourceLoader resourceLoader) {
@@ -548,28 +458,8 @@ 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]]
== Runtime Hints
@@ -585,17 +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.
@@ -604,130 +487,68 @@ For instance, the return type of a `@Controller` method is inspected, and releva
For cases that the core container cannot infer, you can register such hints programmatically.
A number of convenient annotations are also provided for common use cases.
[[aot.hints.import-runtime-hints]]
=== `@ImportRuntimeHints`
{spring-framework-api}/aot/hint/RuntimeHintsRegistrar.html[`RuntimeHintsRegistrar`]
implementations allow you to get a callback to the `RuntimeHints` instance managed by the
AOT engine. Implementations of this interface can be registered using
{spring-framework-api}/context/annotation/ImportRuntimeHints.html[`@ImportRuntimeHints`]
on any Spring bean or `@Bean` factory method. `RuntimeHintsRegistrar` implementations are
detected and invoked at build time.
`RuntimeHintsRegistrar` implementations allow you to get a callback to the `RuntimeHints` instance managed by the AOT engine.
Implementations of this interface can be registered using `@ImportRuntimeHints` on any Spring bean or `@Bean` factory method.
`RuntimeHintsRegistrar` implementations are detected and invoked at build time.
include-code::./SpellCheckService[]
If at all possible, `@ImportRuntimeHints` should be used as close as possible to the component that requires the hints.
This way, if the component is not contributed to the `BeanFactory`, the hints will not be contributed either.
This way, if the component is not contributed to the `BeanFactory`, the hints won't be contributed either.
It is also possible to register an implementation statically by adding an entry in `META-INF/spring/aot.factories` with a key equal to the fully-qualified name of the `RuntimeHintsRegistrar` interface.
[[aot.hints.reflective]]
=== `@Reflective`
{spring-framework-api}/aot/hint/annotation/Reflective.html[`@Reflective`] provides an idiomatic way to flag the need for reflection on an annotated element.
For instance, `@EventListener` is meta-annotated with `@Reflective` since the underlying implementation invokes the annotated method using reflection.
Out-of-the-box, only Spring beans are considered, but you can opt-in for scanning using
{spring-framework-api}/context/annotation/ReflectiveScan.html[`@ReflectiveScan`]. In the
example below, all types in the `com.example.app` package and its subpackages are
considered:
include-code::./MyConfiguration[]
Scanning happens during AOT processing, and the types in the target packages do not need to have a class-level annotation to be considered.
This performs a _deep scan_, and the presence of `@Reflective`, either directly or as a meta-annotation, is checked on types, fields, constructors, methods, and enclosed elements.
By default, `@Reflective` registers an invocation hint for the annotated element.
This can be tuned by specifying a custom `ReflectiveProcessor` implementation via the `@Reflective` annotation.
By default, only Spring beans are considered, and an invocation hint is registered for the annotated element.
This can be tuned by specifying a custom `ReflectiveProcessor` implementation via the
`@Reflective` annotation.
Library authors can reuse this annotation for their own purposes.
An example of such customization is covered in the next section.
If components other than Spring beans need to be processed, a `BeanFactoryInitializationAotProcessor` can detect the relevant types and use `ReflectiveRuntimeHintsRegistrar` to process them.
[[aot.hints.register-reflection]]
=== `@RegisterReflection`
{spring-framework-api}/aot/hint/annotation/RegisterReflection.html[`@RegisterReflection`] is a specialization of `@Reflective` that provides a declarative way to register reflection for arbitrary types.
[[aot.hints.register-reflection-for-binding]]
=== `@RegisterReflectionForBinding`
NOTE: As a specialization of `@Reflective`, `@RegisterReflection` is also detected if you are using `@ReflectiveScan`.
In the following example, public constructors and public methods can be invoked via reflection on `AccountService`:
include-code::./MyConfiguration[tag=snippet,indent=0]
`@RegisterReflection` can be applied to any target type at the class level, but it can also be applied directly to a method to better indicate where the hints are actually required.
`@RegisterReflection` can be used as a meta-annotation to support more specific needs.
{spring-framework-api}/aot/hint/annotation/RegisterReflectionForBinding.html[`@RegisterReflectionForBinding`] is a composed annotation that is meta-annotated with `@RegisterReflection` and registers the need for serializing arbitrary types.
{spring-framework-api}/aot/hint/annotation/RegisterReflectionForBinding.html[`@RegisterReflectionForBinding`] is a specialization of `@Reflective` that registers the need for serializing arbitrary types.
A typical use case is the use of DTOs that the container cannot infer, such as using a web client within a method body.
The following example registers `Order` for serialization.
include-code::./OrderService[tag=snippet,indent=0]
This registers hints for constructors, fields, properties, and record components of `Order`.
Hints are also registered for types transitively used on properties and record components.
In other words, if `Order` exposes others types, hints are registered for those as well.
[[aot.hints.convention-based-conversion]]
=== Runtime Hints for Convention-based Conversion
Although the core container provides built-in support for automatic conversion of many
common types (see xref:core/validation/convert.adoc[Spring Type Conversion]), some
conversions are supported via a convention-based algorithm that relies on reflection.
Specifically, if there is no explicit `Converter` registered with the `ConversionService`
for a particular source &#8594; target type pair, the internal `ObjectToObjectConverter`
will attempt to use conventions to convert a source object to a target type by delegating
to a method on the source object or to a static factory method or constructor on the
target type. Since this convention-based algorithm can be applied to arbitrary types at
runtime, the core container is not able to infer the runtime hints necessary to support
such reflection.
If you encounter convention-based conversion issues within a native image resulting from
lacking runtime hints, you can register the necessary hints programmatically. For
example, if your application requires a conversion from `java.time.Instant` to
`java.sql.Timestamp` and relies on `ObjectToObjectConverter` to invoke
`java.sql.Timestamp.from(Instant)` using reflection, you could implement a custom
`RuntimeHintsRegitrar` to support this use case within a native image, as demonstrated in
the following example.
`@RegisterReflectionForBinding` can be applied to any Spring bean at the class level, but it can also be applied directly to a method, field, or constructor to better indicate where the hints are actually required.
The following example registers `Account` for serialization.
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class TimestampConversionRuntimeHints implements RuntimeHintsRegistrar {
@Component
public class OrderService {
public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
ReflectionHints reflectionHints = hints.reflection();
@RegisterReflectionForBinding(Account.class)
public void process(Order order) {
// ...
}
reflectionHints.registerTypeIfPresent(classLoader, "java.sql.Timestamp", hint -> hint
.withMethod("from", List.of(TypeReference.of(Instant.class)), ExecutableMode.INVOKE)
.onReachableType(TypeReference.of("java.sql.Timestamp")));
}
}
----
======
`TimestampConversionRuntimeHints` can then be registered declaratively via
<<aot.hints.import-runtime-hints>> or statically via a `META-INF/spring/aot.factories`
configuration file.
[NOTE]
====
The above `TimestampConversionRuntimeHints` class is a simplified version of the
`ObjectToObjectConverterRuntimeHints` class that is included in the framework and
registered by default.
Thus, this specific `Instant`-to-`Timestamp` use case is already handled by the framework.
====
[[aot.hints.testing]]
=== Testing Runtime Hints
Spring Core also ships `RuntimeHintsPredicates`, a utility for checking that existing hints match a particular use case.
This can be used in your own tests to validate that a `RuntimeHintsRegistrar` produces the expected results.
This can be used in your own tests to validate that a `RuntimeHintsRegistrar` contains the expected results.
We can write a test for our `SpellCheckService` and ensure that we will be able to load a dictionary at runtime:
include-code::./SpellCheckServiceTests[tag=hintspredicates]
@@ -753,7 +574,7 @@ If you forgot to contribute a hint, the test will fail and provide some details
[source,txt,indent=0,subs="verbatim,quotes"]
----
org.springframework.docs.core.aot.hints.testing.SampleReflection performReflection
INFO: Spring version: 6.2.0
INFO: Spring version:6.0.0-SNAPSHOT
Missing <"ReflectionHints"> for invocation <java.lang.Class#forName>
with arguments ["org.springframework.core.SpringVersion",
@@ -1,3 +1,7 @@
[[appendix]]
= Appendix
:page-section-summary-toc: 1
@@ -12,6 +12,7 @@ Spring's extensible XML configuration mechanism is based on XML Schema. If you a
familiar with Spring's current XML configuration extensions that come with the standard
Spring distribution, you should first read the previous section on xref:core/appendix/xsd-schemas.adoc[XML Schemas].
To create new XML configuration extensions:
. xref:core/appendix/xml-custom.adoc#core.appendix.xsd-custom-schema[Author] an XML schema to describe your custom element(s).
@@ -37,6 +38,7 @@ examples follow later in this appendix. The intent of this first simple example
through the basic steps of making a custom extension.)
[[xsd-custom-schema]]
== Authoring the Schema
@@ -108,6 +110,7 @@ can use autocompletion to let a user choose between several configuration option
defined in the enumeration.
[[xsd-custom-namespacehandler]]
== Coding a `NamespaceHandler`
@@ -142,7 +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;
@@ -158,7 +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
@@ -184,6 +187,7 @@ means that each `BeanDefinitionParser` contains only the logic for parsing a sin
custom element, as we can see in the next step.
[[xsd-custom-parser]]
== Using `BeanDefinitionParser`
@@ -198,7 +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;
@@ -236,7 +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
@@ -272,11 +276,13 @@ the basic grunt work of creating a single `BeanDefinition`.
single `BeanDefinition` represents.
======
In this simple case, this is all that we need to do. The creation of our single
`BeanDefinition` is handled by the `AbstractSingleBeanDefinitionParser` superclass, as
is the extraction and setting of the bean definition's unique identifier.
[[xsd-custom-registration]]
== Registering the Handler and the Schema
@@ -288,6 +294,7 @@ can, for example, be distributed alongside your binary classes in a JAR file. Th
XML parsing infrastructure automatically picks up your new extension by consuming
these special properties files, the formats of which are detailed in the next two sections.
[[xsd-custom-registration-spring-handlers]]
=== Writing `META-INF/spring.handlers`
@@ -306,6 +313,7 @@ The first part (the key) of the key-value pair is the URI associated with your c
namespace extension and needs to exactly match exactly the value of the `targetNamespace`
attribute, as specified in your custom XSD schema.
[[xsd-custom-registration-spring-schemas]]
=== Writing 'META-INF/spring.schemas'
@@ -329,6 +337,7 @@ You are encouraged to deploy your XSD file (or files) right alongside
the `NamespaceHandler` and `BeanDefinitionParser` classes on the classpath.
[[xsd-custom-using]]
== Using a Custom Extension in Your Spring XML Configuration
@@ -362,11 +371,13 @@ in a Spring XML configuration file:
<1> Our custom bean.
[[xsd-custom-meat]]
== More Detailed Examples
This section presents some more detailed examples of custom XML extensions.
[[xsd-custom-custom-nested]]
=== Nesting Custom Elements within Custom Elements
@@ -405,7 +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;
@@ -438,7 +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
@@ -469,7 +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;
@@ -511,7 +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
@@ -587,7 +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;
@@ -603,7 +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
@@ -626,7 +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;
@@ -677,7 +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
@@ -742,6 +753,7 @@ http\://www.foo.example/schema/component=com.foo.ComponentNamespaceHandler
http\://www.foo.example/schema/component/component.xsd=com/foo/component.xsd
----
[[xsd-custom-custom-just-attributes]]
=== Custom Attributes on "`Normal`" Elements
@@ -775,7 +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;
@@ -795,7 +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
@@ -831,7 +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;
@@ -849,7 +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
@@ -874,7 +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;
@@ -930,7 +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
@@ -995,3 +1007,5 @@ http\://www.foo.example/schema/jcache=com.foo.JCacheNamespaceHandler
# in 'META-INF/spring.schemas'
http\://www.foo.example/schema/jcache/jcache.xsd=com/foo/jcache.xsd
----
@@ -4,6 +4,7 @@
This part of the appendix lists XML schemas related to the core container.
[[xsd-schemas-util]]
== The `util` Schema
@@ -28,6 +29,7 @@ correct schema so that the tags in the `util` namespace are available to you):
</beans>
----
[[xsd-schemas-util-constant]]
=== Using `<util:constant/>`
@@ -119,7 +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;
@@ -132,7 +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
@@ -150,7 +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;
@@ -166,7 +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
@@ -184,6 +186,7 @@ Kotlin::
</bean>
----
[[xsd-schemas-util-property-path]]
=== Using `<util:property-path/>`
@@ -305,6 +308,7 @@ You can specifically set the result type in the actual definition. This is not n
for most use cases, but it can sometimes be useful. See the javadoc for more info on
this feature.
[[xsd-schemas-util-properties]]
=== Using `<util:properties/>`
@@ -330,6 +334,7 @@ The following example uses a `util:properties` element to make a more concise re
<util:properties id="jdbcConfiguration" location="classpath:com/foo/jdbc-production.properties"/>
----
[[xsd-schemas-util-list]]
=== Using `<util:list/>`
@@ -384,6 +389,7 @@ following configuration:
If no `list-class` attribute is supplied, the container chooses a `List` implementation.
[[xsd-schemas-util-map]]
=== Using `<util:map/>`
@@ -438,6 +444,7 @@ following configuration:
If no `'map-class'` attribute is supplied, the container chooses a `Map` implementation.
[[xsd-schemas-util-set]]
=== Using `<util:set/>`
@@ -493,6 +500,7 @@ following configuration:
If no `set-class` attribute is supplied, the container chooses a `Set` implementation.
[[xsd-schemas-aop]]
== The `aop` Schema
@@ -522,6 +530,7 @@ are available to you):
----
[[xsd-schemas-context]]
== The `context` Schema
@@ -546,6 +555,7 @@ available to you:
</beans>
----
[[xsd-schemas-context-pphc]]
=== Using `<property-placeholder/>`
@@ -589,25 +599,34 @@ element for that purpose. Similarly, Spring's
xref:integration/cache/annotations.adoc[caching annotations] need to be explicitly
xref:integration/cache/annotations.adoc#cache-annotation-enable[enabled] as well.
[[xsd-schemas-context-component-scan]]
=== Using `<component-scan/>`
This element is detailed in the section on xref:core/beans/annotation-config.adoc[annotation-based container configuration].
This element is detailed in the section on xref:core/beans/annotation-config.adoc[annotation-based container configuration]
.
[[xsd-schemas-context-ltw]]
=== Using `<load-time-weaver/>`
This element is detailed in the section on xref:core/aop/using-aspectj.adoc#aop-aj-ltw[load-time weaving with AspectJ in the Spring Framework].
This element is detailed in the section on xref:core/aop/using-aspectj.adoc#aop-aj-ltw[load-time weaving with AspectJ in the Spring Framework]
.
[[xsd-schemas-context-sc]]
=== Using `<spring-configured/>`
This element is detailed in the section on xref:core/aop/using-aspectj.adoc#aop-atconfigurable[using AspectJ to dependency inject domain objects with Spring].
This element is detailed in the section on xref:core/aop/using-aspectj.adoc#aop-atconfigurable[using AspectJ to dependency inject domain objects with Spring]
.
[[xsd-schemas-context-mbe]]
=== Using `<mbean-export/>`
This element is detailed in the section on xref:integration/jmx/naming.adoc#jmx-context-mbeanexport[configuring annotation-based MBean export].
This element is detailed in the section on xref:integration/jmx/naming.adoc#jmx-context-mbeanexport[configuring annotation-based MBean export]
.
[[xsd-schemas-beans]]
@@ -647,3 +666,7 @@ as it stands).
In the case of the preceding example, you could assume that there is some logic that consumes
the bean definition and sets up some caching infrastructure that uses the supplied metadata.
@@ -3,3 +3,7 @@
:page-section-summary-toc: 1
This chapter covers Spring's Inversion of Control (IoC) container.
@@ -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.
====
@@ -62,3 +62,6 @@ application context in which it is defined. This means that, if you put
it only checks for `@Autowired` beans in your controllers, and not your services. See
xref:web/webmvc/mvc-servlet.adoc[The DispatcherServlet] for more information.
====
@@ -1,5 +1,5 @@
[[beans-autowired-annotation-primary]]
= Fine-tuning Annotation-based Autowiring with `@Primary` or `@Fallback`
= Fine-tuning Annotation-based Autowiring with `@Primary`
Because autowiring by type may lead to multiple candidates, it is often necessary to have
more control over the selection process. One way to accomplish this is with Spring's
@@ -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 {
@@ -50,57 +50,14 @@ Kotlin::
----
======
Alternatively, as of 6.2, there is a `@Fallback` annotation for demarcating
any beans other than the regular ones to be injected. If only one regular
bean is left, it is effectively primary as well:
With the preceding configuration, the following `MovieRecommender` is autowired with the
`firstMovieCatalog`:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
----
@Configuration
public class MovieConfiguration {
@Bean
public MovieCatalog firstMovieCatalog() { ... }
@Bean
@Fallback
public MovieCatalog secondMovieCatalog() { ... }
// ...
}
----
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
@Configuration
class MovieConfiguration {
@Bean
fun firstMovieCatalog(): MovieCatalog { ... }
@Bean
@Fallback
fun secondMovieCatalog(): MovieCatalog { ... }
// ...
}
----
======
With both variants of the preceding configuration, the following
`MovieRecommender` is autowired with the `firstMovieCatalog`:
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -113,7 +70,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -152,3 +109,6 @@ The corresponding bean definitions follow:
</beans>
----
@@ -1,20 +1,19 @@
[[beans-autowired-annotation-qualifiers]]
= Fine-tuning Annotation-based Autowiring with Qualifiers
`@Primary` and `@Fallback` are effective ways to use autowiring by type with several
instances when one primary (or non-fallback) candidate can be determined.
When you need more control over the selection process, you can use Spring's `@Qualifier`
annotation. You can associate qualifier values with specific arguments, narrowing the set
of type matches so that a specific bean is chosen for each argument. In the simplest case,
this can be a plain descriptive value, as shown in the following example:
`@Primary` is an effective way to use autowiring by type with several instances when one
primary candidate can be determined. When you need more control over the selection process,
you can use Spring's `@Qualifier` annotation. You can associate qualifier values
with specific arguments, narrowing the set of type matches so that a specific bean is
chosen for each argument. In the simplest case, this can be a plain descriptive value, as
shown in the following example:
--
[tabs]
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -28,7 +27,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -50,7 +49,7 @@ 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 +70,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -151,38 +150,51 @@ injected into a `Set<MovieCatalog>` annotated with `@Qualifier("action")`.
[TIP]
====
Letting qualifier values select against target bean names, within the type-matching
candidates, does not require a `@Qualifier` annotation at the injection point. If there
is no other resolution indicator (such as a qualifier, a primary marker, or a fallback
marker), for a non-unique dependency situation, Spring matches the injection point name
(that is, the field name or parameter name) against the target bean names and chooses the
same-named candidate, if any (either by bean name or by associated alias).
candidates, does not require a `@Qualifier` annotation at the injection point.
If there is no other resolution indicator (such as a qualifier or a primary marker),
for a non-unique dependency situation, Spring matches the injection point name
(that is, the field name or parameter name) against the target bean names and chooses
the same-named candidate, if any (either by bean name or by associated alias).
Since version 6.1, this requires the `-parameters` Java compiler flag to be present. As
of 6.2, the container applies fast shortcut resolution for bean name matches, bypassing
the full type matching algorithm when the parameter name matches the bean name and no
type, qualifier, primary, or fallback conditions override the match. It is therefore
recommendable for your parameter names to match the target bean names.
Since version 6.1, this requires the `-parameters` Java compiler flag to be present.
====
As an alternative for injection by name, consider the JSR-250 `@Resource` annotation
which is semantically defined to identify a specific target component by its unique name,
with the declared type being irrelevant for the matching process. `@Autowired` has rather
different semantics: after selecting candidate beans by type, the specified `String`
different semantics: After selecting candidate beans by type, the specified `String`
qualifier value is considered within those type-selected candidates only (for example,
matching an `account` qualifier against beans marked with the same qualifier label).
For beans that are themselves defined as a collection, `Map`, or array type, `@Resource`
is a fine solution, referring to the specific collection or array bean by unique name.
That said, you can match collection, `Map`, and array types through Spring's
That said, as of 4.3, you can match collection, `Map`, and array types through Spring's
`@Autowired` type matching algorithm as well, as long as the element type information
is preserved in `@Bean` return type signatures or collection inheritance hierarchies.
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.
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.
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 +210,7 @@ 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 +223,7 @@ 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 +241,7 @@ 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 +262,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -274,7 +286,7 @@ Kotlin::
Next, you can provide the information for the candidate bean definitions. You can add
`<qualifier/>` tags as sub-elements of the `<bean/>` tag and then specify the `type` and
`value` to match your custom qualifier annotations. The type is matched against the
fully-qualified class name of the annotation. Alternatively, as a convenience if no risk of
fully-qualified class name of the annotation. Alternately, as a convenience if no risk of
conflicting names exists, you can use the short class name. The following example
demonstrates both approaches:
@@ -322,7 +334,7 @@ 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 +345,7 @@ 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 +363,7 @@ following example:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class MovieRecommender {
@@ -366,7 +378,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -406,7 +418,7 @@ 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 +433,7 @@ 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 +450,7 @@ 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 +459,7 @@ 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 +476,7 @@ 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 +502,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -568,3 +580,6 @@ the following example:
</beans>
----
--
@@ -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 {
@@ -308,8 +285,7 @@ set of multiple matches for the specific bean type (as returned by the factory m
Note that the standard `jakarta.annotation.Priority` annotation is not available at the
`@Bean` level, since it cannot be declared on methods. Its semantics can be modeled
through `@Order` values in combination with `@Primary` or `@Fallback` on a single bean
for each type.
through `@Order` values in combination with `@Primary` on a single bean for each type.
====
Even typed `Map` instances can be autowired as long as the expected key type is `String`.
@@ -320,7 +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 {
@@ -337,7 +313,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -362,7 +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 {
@@ -379,7 +355,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -445,15 +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:
As of Spring Framework 5.0, 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 {
@@ -466,7 +442,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -478,13 +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
@@ -496,7 +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 {
@@ -512,7 +481,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class MovieRecommender {
@@ -531,3 +500,6 @@ The `@Autowired`, `@Inject`, `@Value`, and `@Resource` annotations are handled b
within your own `BeanPostProcessor` or `BeanFactoryPostProcessor` types (if any).
These types must be 'wired up' explicitly by using XML or a Spring `@Bean` method.
====
@@ -27,5 +27,7 @@ with the `CustomAutowireConfigurer`
When multiple beans qualify as autowire candidates, the determination of a "`primary`" is
as follows: If exactly one bean definition among the candidates has a `primary`
attribute set to `true`, it is selected. For annotation-based configuration, see
xref:core/beans/annotation-config/autowired-primary.adoc[Fine-tuning with `@Primary` or `@Fallback`].
attribute set to `true`, it is selected.
@@ -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
@@ -96,3 +96,6 @@ Kotlin::
private lateinit var s: List<Store<Integer>>
----
======
@@ -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 {
@@ -64,3 +64,7 @@ JDK 11. As of Jakarta EE 9, the package lives in `jakarta.annotation` now. If ne
the `jakarta.annotation-api` artifact needs to be obtained via Maven Central now,
simply to be added to the application's classpath like any other library.
====
@@ -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 {
@@ -142,3 +142,4 @@ Kotlin::
`ApplicationContext`.
======
--
@@ -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 {
@@ -101,11 +101,8 @@ NOTE: When configuring a `PropertySourcesPlaceholderConfigurer` using JavaConfig
Using the above configuration ensures Spring initialization failure if any `${}`
placeholder could not be resolved. It is also possible to use methods like
`setPlaceholderPrefix()`, `setPlaceholderSuffix()`, `setValueSeparator()`, or
`setEscapeCharacter()` to customize the placeholder syntax. In addition, the default
escape character can be changed or disabled globally by setting the
`spring.placeholder.escapeCharacter.default` property via a JVM system property (or via
the xref:appendix.adoc#appendix-spring-properties[`SpringProperties`] mechanism).
`setPlaceholderPrefix`, `setPlaceholderSuffix`, or `setValueSeparator` to customize
placeholders.
NOTE: Spring Boot configures by default a `PropertySourcesPlaceholderConfigurer` bean that
will get properties from `application.properties` and `application.yml` files.
@@ -120,22 +117,22 @@ It is possible to provide a default value as following:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
public class MovieRecommender {
@Component
public class MovieRecommender {
private final String catalog;
private final String catalog;
public MovieRecommender(@Value("${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)
@@ -151,23 +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 {
@@ -189,22 +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(
@@ -218,26 +215,28 @@ 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(
@Value("#{{'Thriller': 100, 'Comedy': 300}}") private val countOfMoviesPerCatalog: Map<String, Int>)
----
======
@@ -29,6 +29,7 @@ created and initialized, you have a fully configured and executable system or ap
image::container-magic.png[]
[[beans-factory-metadata]]
== Configuration Metadata
@@ -62,6 +63,8 @@ Typically, one does not configure fine-grained domain objects in the container,
it is usually the responsibility of repositories and business logic to create and load
domain objects.
[[beans-factory-xml]]
=== XML as an External Configuration DSL
@@ -107,16 +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")
----
======
@@ -185,6 +188,7 @@ definition. This linkage between `id` and `ref` elements expresses the dependenc
collaborating objects. For details of configuring an object's dependencies, see
xref:core/beans/dependencies.adoc[Dependencies].
[[beans-factory-xml-import]]
=== Composing XML-based Configuration Metadata
@@ -240,6 +244,7 @@ The namespace itself provides the import directive feature. Further
configuration features beyond plain bean definitions are available in a selection
of XML namespaces provided by Spring -- for example, the `context` and `util` namespaces.
[[beans-factory-groovy]]
=== The Groovy Bean Definition DSL
@@ -274,6 +279,7 @@ supports Spring's XML configuration namespaces. It also allows for importing XML
bean definition files through an `importBeans` directive.
[[beans-factory-client]]
== Using the Container
@@ -288,7 +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");
@@ -302,18 +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()
----
======
@@ -325,14 +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")
----
@@ -346,7 +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");
@@ -355,7 +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")
@@ -370,7 +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");
@@ -379,7 +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")
@@ -397,3 +403,6 @@ code should never use them. Indeed, your application code should have no calls t
Spring's integration with web frameworks provides dependency injection for various web
framework components such as controllers and JSF-managed beans, letting you declare
a dependency on a specific bean through metadata (such as an autowiring annotation).
@@ -21,6 +21,7 @@ operate on shared `BeanDefinition` objects as a core metadata representation.
This is the essence of what makes Spring's container so flexible and extensible.
[[context-introduction-ctx-vs-beanfactory]]
== `BeanFactory` or `ApplicationContext`?
@@ -89,7 +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
@@ -103,7 +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
@@ -123,7 +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);
@@ -139,7 +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)
@@ -78,3 +78,7 @@ important (at least for singleton beans) that if you have a (parent) bean defini
which you intend to use only as a template, and this definition specifies a class, you
must make sure to set the __abstract__ attribute to __true__, otherwise the application
context will actually (attempt to) pre-instantiate the `abstract` bean.
@@ -1,29 +1,28 @@
[[beans-classpath-scanning]]
= Classpath Scanning and Managed Components
Most examples in this chapter use XML to specify the configuration metadata that
produces each `BeanDefinition` within the Spring container. The previous section
(xref:core/beans/annotation-config.adoc[Annotation-based Container Configuration])
demonstrates how to provide a lot of the configuration metadata through source-level
annotations. Even in those examples, however, the "base" bean definitions are explicitly
defined in the XML file, while the annotations drive only the dependency injection.
This section describes an option for implicitly detecting the candidate components by
scanning the classpath. Candidate components are classes that match against a filter
criteria and have a corresponding bean definition registered with the container.
This removes the need to use XML to perform bean registration. Instead, you can use
annotations (for example, `@Component`), AspectJ type expressions, or your own
Most examples in this chapter use XML to specify the configuration metadata that produces
each `BeanDefinition` within the Spring container. The previous section
(xref:core/beans/annotation-config.adoc[Annotation-based Container Configuration]) demonstrates how to provide a lot of the configuration
metadata through source-level annotations. Even in those examples, however, the "base"
bean definitions are explicitly defined in the XML file, while the annotations drive only
the dependency injection. This section describes an option for implicitly detecting the
candidate components by scanning the classpath. Candidate components are classes that
match against a filter criteria and have a corresponding bean definition registered with
the container. This removes the need to use XML to perform bean registration. Instead, you
can use annotations (for example, `@Component`), AspectJ type expressions, or your own
custom filter criteria to select which classes have bean definitions registered with
the container.
[NOTE]
====
You can define beans using Java rather than using XML files. Take a look at the
`@Configuration`, `@Bean`, `@Import`, and `@DependsOn` annotations for examples
of how to use these features.
`@Configuration`, `@Bean`, `@Import`, and `@DependsOn` annotations for examples of how to
use these features.
====
[[beans-stereotype-annotations]]
== `@Component` and Further Stereotype Annotations
@@ -47,6 +46,7 @@ clearly the better choice. Similarly, as stated earlier, `@Repository` is alread
supported as a marker for automatic exception translation in your persistence layer.
[[beans-meta-annotations]]
== Using Meta-annotations and Composed Annotations
@@ -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)
@@ -195,6 +195,7 @@ For further details, see the
wiki page.
[[beans-scanning-autodetection]]
== Automatically Detecting Classes and Registering Bean Definitions
@@ -206,7 +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 {
@@ -221,7 +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)
@@ -232,7 +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 {
@@ -242,7 +243,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Repository
class JpaMovieFinder : MovieFinder {
@@ -261,7 +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")
@@ -272,7 +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"])
@@ -316,8 +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).
@@ -333,6 +334,7 @@ NOTE: You can disable the registration of `AutowiredAnnotationBeanPostProcessor`
with a value of `false`.
[[beans-scanning-filters]]
== Using Filters to Customize Scanning
@@ -378,7 +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",
@@ -391,7 +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"],
@@ -424,6 +426,7 @@ annotated or meta-annotated with `@Component`, `@Repository`, `@Service`, `@Cont
`@RestController`, or `@Configuration`.
[[beans-factorybeans-annotations]]
== Defining Bean Metadata within Components
@@ -435,7 +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 {
@@ -454,7 +457,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class FactoryMethodComponent {
@@ -477,15 +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:
@@ -494,7 +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 {
@@ -533,7 +532,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class FactoryMethodComponent {
@@ -586,7 +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 {
@@ -600,7 +599,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
class FactoryMethodComponent {
@@ -660,6 +659,7 @@ analogous to how the container selects between multiple `@Autowired` constructor
====
[[beans-scanning-name-generator]]
== Naming Autodetected Components
@@ -699,7 +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 {
@@ -709,7 +709,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Service("myMovieLister")
class SimpleMovieLister {
@@ -722,7 +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 {
@@ -732,7 +732,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Repository
class MovieFinderImpl : MovieFinder {
@@ -751,7 +751,7 @@ and bean definition show.
TIP: If you run into naming conflicts due to multiple autodetected components having the
same non-qualified class name (i.e., classes with identical names but residing in
different packages), you may need to configure a `BeanNameGenerator` that defaults to the
fully qualified class name for the generated bean name. The
fully qualified class name for the generated bean name. As of Spring Framework 5.2.3, the
`FullyQualifiedAnnotationBeanNameGenerator` located in package
`org.springframework.context.annotation` can be used for such purposes.
@@ -759,7 +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)
@@ -770,7 +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)
@@ -793,6 +793,7 @@ components may be making explicit references to it. On the other hand, the
auto-generated names are adequate whenever the container is responsible for wiring.
[[beans-scanning-scope-resolver]]
== Providing a Scope for Autodetected Components
@@ -805,7 +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
@@ -816,7 +817,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Scope("prototype")
@Repository
@@ -832,10 +833,10 @@ definitions, there is no notion of bean definition inheritance, and inheritance
hierarchies at the class level are irrelevant for metadata purposes.
For details on web-specific scopes such as "`request`" or "`session`" in a Spring context,
see xref:core/beans/factory-scopes.adoc#beans-factory-scopes-other[Request, Session, Application, and WebSocket Scopes].
As with the pre-built annotations for those scopes, you may also compose your own scoping
annotations by using Spring's meta-annotation approach: for example, a custom annotation
meta-annotated with `@Scope("prototype")`, possibly also declaring a custom scoped-proxy mode.
see xref:core/beans/factory-scopes.adoc#beans-factory-scopes-other[Request, Session, Application, and WebSocket Scopes]. As with the pre-built annotations for those scopes,
you may also compose your own scoping annotations by using Spring's meta-annotation
approach: for example, a custom annotation meta-annotated with `@Scope("prototype")`,
possibly also declaring a custom scoped-proxy mode.
NOTE: To provide a custom strategy for scope resolution rather than relying on the
annotation-based approach, you can implement the
@@ -848,7 +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)
@@ -859,7 +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)
@@ -877,8 +878,7 @@ Kotlin::
----
When using certain non-singleton scopes, it may be necessary to generate proxies for the
scoped objects. The reasoning is described in
xref:core/beans/factory-scopes.adoc#beans-factory-scopes-other-injection[Scoped Beans as Dependencies].
scoped objects. The reasoning is described in xref:core/beans/factory-scopes.adoc#beans-factory-scopes-other-injection[Scoped Beans as Dependencies].
For this purpose, a scoped-proxy attribute is available on the component-scan
element. The three possible values are: `no`, `interfaces`, and `targetClass`. For example,
the following configuration results in standard JDK dynamic proxies:
@@ -887,7 +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)
@@ -898,7 +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)
@@ -916,11 +916,11 @@ 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
@@ -934,7 +934,7 @@ technique:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
@Qualifier("Action")
@@ -945,7 +945,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
@Qualifier("Action")
@@ -957,7 +957,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
@Genre("Action")
@@ -968,7 +968,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
@Genre("Action")
@@ -982,7 +982,7 @@ Kotlin::
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
@Component
@Offline
@@ -993,7 +993,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@Component
@Offline
@@ -1007,3 +1007,7 @@ NOTE: As with most annotation-based alternatives, keep in mind that the annotati
bound to the class definition itself, while the use of XML allows for multiple beans
of the same type to provide variations in their qualifier metadata, because that
metadata is provided per-instance rather than per-class.
@@ -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`]
@@ -24,6 +24,7 @@ package also provides the following functionality:
`HierarchicalBeanFactory` interface.
[[context-functionality-messagesource]]
== Internationalization using `MessageSource`
@@ -101,7 +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");
@@ -112,7 +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")
@@ -160,7 +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 {
@@ -180,7 +181,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class Example {
@@ -223,7 +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");
@@ -235,7 +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")
@@ -272,6 +273,7 @@ See the {spring-framework-api}/context/support/ReloadableResourceBundleMessageSo
javadoc for details.
[[context-functionality-events]]
== Standard and Custom Events
@@ -342,7 +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 {
@@ -361,7 +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,
@@ -378,7 +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 {
@@ -405,7 +407,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class EmailService : ApplicationEventPublisherAware {
@@ -445,7 +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> {
@@ -463,7 +465,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class BlockedListNotifier : ApplicationListener<BlockedListEvent> {
@@ -482,7 +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.
@@ -511,7 +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="..."/>
@@ -532,6 +534,7 @@ complete support for building lightweight,
https://www.enterpriseintegrationpatterns.com[pattern-oriented], event-driven
architectures that build upon the well-known Spring programming model.
[[context-functionality-events-annotation]]
=== Annotation-based Event Listeners
@@ -542,7 +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 {
@@ -561,7 +564,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class BlockedListNotifier {
@@ -575,8 +578,6 @@ Kotlin::
----
======
NOTE: Do not define such beans to be lazy as the `ApplicationContext` will honor 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
@@ -590,7 +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() {
@@ -600,7 +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() {
@@ -620,7 +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) {
@@ -630,7 +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) {
@@ -643,7 +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
@@ -659,8 +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)
@@ -676,7 +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) {
@@ -687,7 +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 {
@@ -704,6 +705,7 @@ The `handleBlockedListEvent()` method publishes a new `ListUpdateEvent` for ever
`BlockedListEvent` that it handles. If you need to publish several events, you can return
a `Collection` or an array of events instead.
[[context-functionality-events-async]]
=== Asynchronous Listeners
@@ -715,7 +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
@@ -726,7 +728,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener
@Async
@@ -750,6 +752,7 @@ Be aware of the following limitations when using asynchronous events:
See xref:integration/observability.adoc#observability.application-events[the `@EventListener` Observability section]
for more information on Observability concerns.
[[context-functionality-events-order]]
=== Ordering Listeners
@@ -760,7 +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)
@@ -771,7 +774,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
@EventListener
@Order(42)
@@ -781,6 +784,7 @@ Kotlin::
----
======
[[context-functionality-events-generics]]
=== Generic Events
@@ -793,7 +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) {
@@ -803,7 +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>) {
@@ -825,7 +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 {
@@ -842,7 +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 {
@@ -860,7 +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"]
----
@@ -874,16 +878,16 @@ for example, for processing all events asynchronously and/or for handling listen
----
[[context-functionality-resources]]
== 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
@@ -906,6 +910,7 @@ with special prefixes to force loading of definitions from the classpath or a UR
regardless of the actual context type.
[[context-functionality-startup]]
== Application Startup Tracking
@@ -930,7 +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");
@@ -944,7 +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")
@@ -982,7 +987,6 @@ or ask for the `ApplicationStartup` type on any injection point.
NOTE: Developers should not use the `"spring.*"` namespace when creating custom startup steps.
This namespace is reserved for internal Spring usage and is subject to change.
[[context-create]]
== Convenient ApplicationContext Instantiation for Web Applications
@@ -1015,6 +1019,7 @@ Examples are `/WEB-INF/{asterisk}Context.xml` (for all files with names that end
(for all such files in any subdirectory of `WEB-INF`).
[[context-deploy-rar]]
== Deploying a Spring `ApplicationContext` as a Jakarta EE RAR File
@@ -1045,8 +1050,7 @@ all application classes into a RAR file (which is a standard JAR file with a dif
file extension).
. Add all required library JARs into the root of the RAR archive.
. Add a
`META-INF/ra.xml` deployment descriptor (as shown in the
{spring-framework-api}/jca/context/SpringContextResourceAdapter.html[javadoc for `SpringContextResourceAdapter`])
`META-INF/ra.xml` deployment descriptor (as shown in the {spring-framework-api}/jca/context/SpringContextResourceAdapter.html[javadoc for `SpringContextResourceAdapter`])
and the corresponding Spring XML bean definition file(s) (typically
`META-INF/applicationContext.xml`).
. Drop the resulting RAR file into your
@@ -1059,3 +1063,7 @@ other modules. A RAR-based `ApplicationContext` may also, for example, schedule
or react to new files in the file system (or the like). If it needs to allow synchronous
access from the outside, it could (for example) export RMI endpoints, which may be used
by other application modules on the same machine.
@@ -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
@@ -45,5 +45,8 @@ xref:data-access/orm/jpa.adoc[Spring's JPA support] where load-time weaving may
necessary for JPA class transformation.
Consult the
{spring-framework-api}/orm/jpa/LocalContainerEntityManagerFactoryBean.html[`LocalContainerEntityManagerFactoryBean`]
javadoc for more detail. For more on AspectJ load-time weaving, see
xref:core/aop/using-aspectj.adoc#aop-aj-ltw[Load-time Weaving with AspectJ in the Spring Framework].
javadoc for more detail. For more on AspectJ load-time weaving, see xref:core/aop/using-aspectj.adoc#aop-aj-ltw[Load-time Weaving with AspectJ in the Spring Framework].
@@ -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.
@@ -74,23 +74,23 @@ lead to concurrent access exceptions, inconsistent state in the bean container,
====
[[beans-definition-overriding]]
== Overriding Beans
Bean overriding occurs when a bean is registered using an identifier that is already
allocated. While bean overriding is possible, it makes the configuration harder to read.
WARNING: Bean overriding will be deprecated in a future release.
Bean overriding is happening when a bean is registered using an identifier that is
already allocated. While bean overriding is possible, it makes the configuration harder
to read and this feature will be deprecated in a future release.
To disable bean overriding altogether, you can set the `allowBeanDefinitionOverriding`
flag to `false` on the `ApplicationContext` before it is refreshed. In such a setup, an
flag to `false` on the `ApplicationContext` before it is refreshed. In such setup, an
exception is thrown if bean overriding is used.
By default, the container logs every attempt to override a bean at `INFO` level so that
you can adapt your configuration accordingly. While not recommended, you can silence
those logs by setting the `allowBeanDefinitionOverriding` flag to `true`.
By default, the container logs every bean overriding at `INFO` level so that you can
adapt your configuration accordingly. While not recommended, you can silence those logs
by setting the `allowBeanDefinitionOverriding` flag to `true`.
.Java Configuration
.Java-configuration
****
If you use Java Configuration, a corresponding `@Bean` method always silently overrides
a scanned bean class with the same component name as long as the return type of the
@@ -98,9 +98,6 @@ a scanned bean class with the same component name as long as the return type of
the `@Bean` factory method in favor of any pre-declared constructor on the bean class.
****
NOTE: We acknowledge that overriding beans in test scenarios is convenient, and there is
explicit support for this as of Spring Framework 6.2. Please refer to
xref:testing/testcontext-framework/bean-overriding.adoc[this section] for more details.
[[beans-beanname]]
@@ -145,6 +142,7 @@ case when there is more than one character and both the first and second charact
are upper case, the original casing gets preserved. These are the same rules as
defined by `java.beans.Introspector.decapitalize` (which Spring uses here).
[[beans-beanname-alias]]
=== Aliasing a Bean outside the Bean Definition
@@ -194,6 +192,7 @@ See xref:core/beans/java/bean-annotation.adoc[Using the `@Bean` Annotation] for
****
[[beans-factory-class]]
== Instantiating Beans
@@ -205,8 +204,7 @@ If you use XML-based configuration metadata, you specify the type (or class) of
that is to be instantiated in the `class` attribute of the `<bean/>` element. This
`class` attribute (which, internally, is a `Class` property on a `BeanDefinition`
instance) is usually mandatory. (For exceptions, see
xref:core/beans/definition.adoc#beans-factory-class-instance-factory-method[Instantiation by Using an Instance Factory Method]
and xref:core/beans/child-bean-definitions.adoc[Bean Definition Inheritance].)
xref:core/beans/definition.adoc#beans-factory-class-instance-factory-method[Instantiation by Using an Instance Factory Method] and xref:core/beans/child-bean-definitions.adoc[Bean Definition Inheritance].)
You can use the `Class` property in one of two ways:
* Typically, to specify the bean class to be constructed in the case where the container
@@ -230,6 +228,7 @@ a bean definition would be `com.example.SomeThing$OtherThing` or
`com.example.SomeThing.OtherThing`.
****
[[beans-factory-class-ctor]]
=== Instantiation with a Constructor
@@ -264,6 +263,7 @@ NOTE: In the case of constructor arguments, the container can select a correspon
constructor among several overloaded constructors. That said, to avoid ambiguities,
it is recommended to keep your constructor signatures as straightforward as possible.
[[beans-factory-class-static-factory-method]]
=== Instantiation with a Static Factory Method
@@ -293,7 +293,7 @@ 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();
@@ -307,7 +307,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class ClientService private constructor() {
companion object {
@@ -341,6 +341,7 @@ overloads of the `mock` method. Choose the most specific variant of `mock` possi
----
====
[[beans-factory-class-instance-factory-method]]
=== Instantiation by Using an Instance Factory Method
@@ -372,7 +373,7 @@ 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 {
@@ -386,7 +387,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class DefaultServiceLocator {
companion object {
@@ -422,7 +423,7 @@ 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 {
@@ -442,7 +443,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class DefaultServiceLocator {
companion object {
@@ -472,6 +473,7 @@ xref:core/beans/definition.adoc#beans-factory-class-static-factory-method[static
`FactoryBean` (notice the capitalization) refers to a Spring-specific
xref:core/beans/factory-extension.adoc#beans-factory-extension-factorybean[`FactoryBean`] implementation class.
[[beans-factory-type-determination]]
=== Determining a Bean's Runtime Type
@@ -487,3 +489,5 @@ The recommended way to find out about the actual runtime type of a particular be
a `BeanFactory.getType` call for the specified bean name. This takes all of the above
cases into account and returns the type of object that a `BeanFactory.getBean` call is
going to return for the same bean name.
@@ -7,3 +7,6 @@ Spring parlance). Even the simplest application has a few objects that work toge
present what the end-user sees as a coherent application. This next section explains how
you go from defining a number of bean definitions that stand alone to a fully realized
application where objects collaborate to achieve a goal.
@@ -16,8 +16,7 @@ advantages:
during development, without negating the option of switching to explicit wiring when
the code base becomes more stable.
When using XML-based configuration metadata (see
xref:core/beans/dependencies/factory-collaborators.adoc[Dependency Injection]), you
When using XML-based configuration metadata (see xref:core/beans/dependencies/factory-collaborators.adoc[Dependency Injection]), you
can specify the autowire mode for a bean definition with the `autowire` attribute of the
`<bean/>` element. The autowiring functionality has four modes. You specify autowiring
per bean and can thus choose which ones to autowire. The following table describes the
@@ -90,22 +89,22 @@ In the latter scenario, you have several options:
* Abandon autowiring in favor of explicit wiring.
* Avoid autowiring for a bean definition by setting its `autowire-candidate` attributes
to `false`, as described in the
xref:core/beans/dependencies/factory-autowire.adoc#beans-factory-autowire-candidate[next section].
to `false`, as described in the xref:core/beans/dependencies/factory-autowire.adoc#beans-factory-autowire-candidate[next section].
* Designate a single bean definition as the primary candidate by setting the
`primary` attribute of its `<bean/>` element to `true`.
* Implement the more fine-grained control available with annotation-based configuration,
as described in xref:core/beans/annotation-config.adoc[Annotation-based Container Configuration].
[[beans-factory-autowire-candidate]]
== 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
@@ -120,22 +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.
====
@@ -16,9 +16,8 @@ not know the location or class of the dependencies. As a result, your classes be
to test, particularly when the dependencies are on interfaces or abstract base classes,
which allow for stub or mock implementations to be used in unit tests.
DI exists in two major variants:
xref:core/beans/dependencies/factory-collaborators.adoc#beans-constructor-injection[Constructor-based dependency injection]
and xref:core/beans/dependencies/factory-collaborators.adoc#beans-setter-injection[Setter-based dependency injection].
DI exists in two major variants: xref:core/beans/dependencies/factory-collaborators.adoc#beans-constructor-injection[Constructor-based dependency injection]
and xref:core/beans/dependencies/factory-collaborators.adoc#beans-setter-injection[Setter-based dependency injection].
[[beans-constructor-injection]]
@@ -35,7 +34,7 @@ injection:
======
Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
----
public class SimpleMovieLister {
@@ -53,7 +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) {
@@ -78,7 +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;
@@ -92,7 +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
@@ -128,7 +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;
@@ -149,7 +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
@@ -160,12 +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"]
@@ -175,11 +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:
@@ -195,11 +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:
@@ -212,8 +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:
@@ -222,7 +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;
@@ -240,7 +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
@@ -249,6 +244,7 @@ Kotlin::
constructor(val years: Int, val ultimateAnswer: String)
----
======
--
[[beans-setter-injection]]
@@ -266,7 +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 {
@@ -284,7 +280,7 @@ Java::
Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
----
class SimpleMovieLister {
@@ -441,7 +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 {
@@ -467,7 +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
@@ -504,7 +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 {
@@ -525,7 +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,
@@ -558,7 +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 {
@@ -582,7 +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 {
@@ -607,3 +603,6 @@ contains the `static` factory method (although, in this example, it is). An inst
(non-static) factory method can be used in an essentially identical fashion (aside
from the use of the `factory-bean` attribute instead of the `class` attribute), so we
do not discuss those details here.
@@ -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"]
----
@@ -33,7 +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.
@@ -10,22 +10,33 @@ pre-instantiation of a singleton bean by marking the bean definition as being
lazy-initialized. A lazy-initialized bean tells the IoC container to create a bean
instance when it is first requested, rather than at startup.
This behavior is controlled by the `@Lazy` annotation or in XML the `lazy-init` attribute on the `<bean/>` element, as
the following example shows:
In XML, this behavior is controlled by the `lazy-init` attribute on the `<bean/>`
element, as the following example shows:
include-code::./ApplicationConfiguration[tag=snippet,indent=0]
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="lazy" class="com.something.ExpensiveToCreateBean" lazy-init="true"/>
<bean name="not.lazy" class="com.something.AnotherBean"/>
----
When the preceding configuration is consumed by an `ApplicationContext`, the `lazy` bean
is not eagerly pre-instantiated when the `ApplicationContext` starts,
whereas the `notLazy` one is eagerly pre-instantiated.
whereas the `not.lazy` bean is eagerly pre-instantiated.
However, when a lazy-initialized bean is a dependency of a singleton bean that is
not lazy-initialized, the `ApplicationContext` creates the lazy-initialized bean at
startup, because it must satisfy the singleton's dependencies. The lazy-initialized bean
is injected into a singleton bean elsewhere that is not lazy-initialized.
You can also control lazy-initialization for a set of beans by using the `@Lazy` annotation on your `@Configuration`
annotated class or in XML using the `default-lazy-init` attribute on the `<beans/>` element, as the following example
shows:
You can also control lazy-initialization at the container level by using the
`default-lazy-init` attribute on the `<beans/>` element, as the following example shows:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<beans default-lazy-init="true">
<!-- no beans will be pre-instantiated... -->
</beans>
----
include-code::./LazyConfiguration[tag=snippet,indent=0]

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