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76 Commits

Author SHA1 Message Date
Sam Brannen ed3d91b929 Update antora-extensions to 1.14.12
See gh-36851
2026-05-28 11:01:56 +02:00
Sam Brannen 731ceb8aca Upgrade to fast-xml-parser 5.7.0 2026-05-27 12:19:12 +02:00
Sam Brannen 6f213fb6a0 Upgrade Antora dependencies 2026-05-27 12:13:00 +02:00
Sam Brannen 131ae59724 Pin Node.js version to 24.15.0
Prior to this commit, the `antora` Gradle task silently failed to build
the reference documentation, since Antora uses the latest LTS release
for Node.js by default, and the latest LTS apparently does not work for
us.
2026-05-27 12:09:02 +02:00
Brian Clozel dd3b3a7c69 Remove 6.0.x and 6.1.x reference docs
Branches are now in commercial support mode.
2026-03-23 09:32:20 +01:00
github-actions[bot] cbe79a9241 Update Antora Spring UI to v0.4.26 2026-03-14 10:10:40 +00:00
Sébastien Deleuze ef4a5fb54c Upgrade Antora dependencies
See gh-36105
See gh-36106
2026-01-07 10:20:21 +01:00
Sam Brannen 8ffaec5d72 Update rsync-antora-reference to v0.0.22
Closes gh-35951
2025-12-02 15:40:24 +01:00
Sam Brannen 578cdb5f7e Update antora-extensions to 1.14.7
Closes gh-35949
2025-12-02 15:38:11 +01:00
Sam Brannen 305a512a55 Stop linking to 6.1.22-SNAPSHOT reference docs
With this commit, we now include snapshots for main (which currently
correlates to 7.0.x), 6.2.x, and 7.0.x to 9.*.x.

Closes gh-35923
2025-11-28 12:59:04 +01:00
github-actions[bot] cf036eeaa3 Update Antora UI Spring to v0.4.25
Closes gh-35877

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
2025-11-24 14:43:29 +01:00
github-actions[bot] fa8a30f753 Update Antora Spring UI to v0.4.22
Closes gh-35858
2025-11-24 10:17:15 +01:00
github-actions[bot] f63ae425bf Update Antora Spring UI to v0.4.20
Closes gh-35812
2025-11-17 14:21:09 +01:00
github-actions[bot] fa20dd820d Update Antora Spring UI to v0.4.19
Closes gh-35796
2025-11-12 12:33:31 +01:00
Sébastien Deleuze 01cebc85b4 Flip the Java 17/25 order
To use Java 17 as the default.
2025-09-23 18:46:47 +02:00
Sébastien Deleuze 6cf89a1e58 Upgrade to Gradle 9.1.0 and Java 25 2025-09-23 18:26:58 +02:00
Brian Clozel e5e8574466 Install both Java 17 and Java 24 for building docs
Docs branches have different Java requirements we should ensure that all
required Java versions are available locally.
2025-06-13 00:52:48 +02:00
Brian Clozel a2cabcbb90 Enable automatic toolchain provisioning 2025-06-12 17:27:03 +02:00
Brian Clozel 9b3625b39e Upgrade to Gradle 8.14.2 2025-06-12 09:33:44 +02:00
Brian Clozel 7232e83807 Fix failing build for docs
As of https://github.com/spring-projects/spring-framework/issues/35007,
the auto-provisioning is disabled for Java runtimes in Gradle.
This makes the build fail because Java 24 is required for building the
docs whereas this action is setting up Java 17.

This commit also upgrades other GitHub actions.
2025-06-12 09:22:16 +02:00
Sébastien Deleuze 91afab7723 Fix broken antora task
See https://github.com/spring-io/antora-extensions/pull/43
2025-02-19 16:49:24 +01:00
github-actions[bot] e19a8e58fc Update Antora UI Spring to v0.4.18 (#33899)
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
2024-11-16 17:51:07 +01:00
Sébastien Deleuze 5f2707a7e3 Upgrade Antora extensions to 1.14.2
It adds support to external link CSS style via
override-navigation-builder-extension.
2024-10-22 08:46:36 +02:00
github-actions[bot] 92ecef74ec Update Antora Spring UI to v0.4.17 2024-10-16 14:12:11 +02:00
Stéphane Nicoll 11c9373439 Polish 2024-08-22 11:09:18 +02:00
Stéphane Nicoll 6f8db2cfd3 Upgrade to Java 17.0.12 2024-08-22 10:33:30 +02:00
Stéphane Nicoll bff8cff03b Upgrade to Gradle 8.9 2024-08-22 10:32:50 +02:00
Sébastien Deleuze c55979b8a9 Build documentation branches only for 6.1 and later
To avoid a duplication error caused by a conflict between the
6.0.x branch and the v6.0.23 tag.
2024-08-16 17:01:00 +02:00
github-actions[bot] 097c773b91 Update Antora Spring UI to v0.4.16 2024-06-17 10:06:44 +00:00
Sébastien Deleuze 431cce0b1e Upgrade to Gradle 8.7 2024-05-27 16:57:12 +02:00
Sébastien Deleuze 0ed87a350c Revert "Add update-antora-ui-spring.yml workflow"
This reverts commit 1a43d698d1.
2024-05-27 16:53:11 +02:00
Marcus Hert Da Coregio 1a43d698d1 Add update-antora-ui-spring.yml workflow 2024-05-24 16:55:10 +02:00
Sébastien Deleuze 94c5481e9e Remove per-branch-antora-playbook.yml
Not needed anymore due to gh-32864.
2024-05-22 16:47:44 +02:00
Rob Winch 41675587ea Modernize Antora Build
- Use package.json so dependabot can automatically update JS dependencies
- Use @springio/antora-extensions (automatically apply default extensions
  in proper order)
- Leverage set-algolia-env-extension to manage algolia env variables
- Update to latest ui

Closes gh-32863
2024-05-22 16:45:17 +02:00
Sébastien Deleuze b14a20161f Update spring-doc-actions to 0.0.16 2024-05-16 18:00:25 +02:00
Sébastien Deleuze 10e5029e88 Upgrade to antora-ui-spring 0.4.13
See https://github.com/spring-io/antora-ui-spring/pull/234
2024-05-15 18:44:01 +02:00
Sébastien Deleuze 4b2552f498 Upgrade to antora-ui-spring 0.4.12 in per-branch-antora-playbook.yml 2024-04-05 10:31:54 +02:00
Sébastien Deleuze 554f15262d Upgrade to antora-ui-spring 0.4.12 2024-04-05 10:00:45 +02:00
Sébastien Deleuze 9fc8046728 Upgrade asciidoctor-extensions to 1.0.0-alpha.10
See gh-22171
2024-03-07 18:03:52 +01:00
Rob Winch 9b60075085 Fixes atlas-extension order
The atlas-extension must be registered before the latest-version-extension
so that the latest version logic is applied to versions imported from the
atlas-extension.

Closes gh-32067
2024-01-22 20:40:47 +01:00
Sébastien Deleuze aa2ea2055d Enable .htaccess generation on per branch builds
See gh-32044
2024-01-19 18:34:54 +01:00
Rob Winch f9c1e6053c Update to spring-io/spring-doc-actions v0.0.14 2024-01-19 17:16:05 +01:00
Rob Winch 2362a142c1 Update to antora-extensions 1.8.2 2024-01-19 09:16:27 +01:00
Stéphane Nicoll b656bb4855 Merge pull request #31701 from rwinch/docs-build-version-updates
Docs build version updates
2023-11-28 10:33:31 +01:00
Rob Winch c6eb4c0eae antora-extensions 1.7.0 2023-11-27 23:36:33 -06:00
Rob Winch 57c6cc83da antora-ui-spring v0.4.9 2023-11-27 23:36:33 -06:00
Rob Winch 1943aad216 Remove @opendevise/antora-release-line-extension
This causes conflicts with latest-version-extension and needs removed.

Closes gh-31480
2023-10-25 19:40:40 +02:00
Rob Winch 57b9a57452 Add Search in all Spring Docs
Closes gh-31290
2023-09-22 10:25:36 +02:00
Rob Winch 35f3e5d664 Update to antora-ui-spring 0.3.6 2023-09-08 08:36:24 +01:00
Rob Winch d88eccc837 Update to antora-ui-spring 0.3.5 2023-08-28 14:04:55 -05:00
Stephane Nicoll 3f8db79e1c Docs build updates
Closes gh-31022
2023-08-10 15:51:16 +02:00
Rob Winch e30e453bb4 Use bust-cloudflare-antora-cache@v0.0.11
Various bug fixes and features
2023-08-09 17:11:59 -05:00
Rob Winch edc01f4957 Add caching for the collector
Cache the collector output for tags which speeds up builds with tags.

- Add inject-collector-cache-config-extension
- Update deployment to include the cache in the site
- Update rsync-antora-referece to handle the cache properly
2023-08-09 17:11:17 -05:00
Rob Winch a53a17c01a Add the partial build extension
Allows partial builds to occur from other branches.
2023-08-09 17:08:29 -05:00
Rob Winch 6c95ee2334 latest-version-extension before collector-extension
This ensures that the versions that do not need to be built will be removed
prior to running the collector on them and thus saving time.
2023-08-09 17:07:57 -05:00
Rob Winch 6236ed56e4 Update to antora-extensions 1.4.2 2023-08-09 17:07:06 -05:00
Rob Winch 6455960cf1 Fix space to tabs 2023-08-09 17:06:53 -05:00
Rob Winch 3771743082 Use a map for antora.options 2023-08-09 17:06:36 -05:00
Rob Winch 1e3b4cdc34 Fix site.url
This was causing the .htaccess file to be generated incorrectly which
prevented redirects from happening properly.

Closes gh-31018
2023-08-09 17:04:47 -05:00
Rob Winch 889c9c7de4 Update to antora-ui-spring 0.3.3 2023-07-18 11:14:26 -05:00
Rob Winch da97ab1dea Update to spring-antora-ui v0.3.2 2023-07-12 17:31:20 +01:00
Rob Winch 9ac9cd15fb Update to antora-ui-spring v0.3.1
- Adds GitHub Project Link
- Adds Stackoverflow Link
- Adds Related Documentation links
2023-07-12 17:07:52 +01:00
Stéphane Nicoll 621f0a6568 Merge pull request #30673 from rwinch/spring-doc-actions-v0.0.8
Upgrade to spring-doc-actions 0.0.8
2023-06-19 15:48:41 +02:00
Rob Winch 6fb9e4a9ea Update to spring-doc-actions 0.0.8 2023-06-14 15:47:23 -05:00
rstoyanchev 3881954125 Roll back rsync-antora-reference to 0.0.5 for now 2023-06-14 20:04:24 +01:00
Rob Winch 42a4409c73 Update to antora-ui-spring v0.3.0 2023-06-14 19:52:49 +01:00
Rob Winch 6c5ef6db1e Add bust-cloudflare-antora-cache
This is necessary so that the css and JavaScript cache will be busted
when updates are deployed
2023-06-14 19:52:49 +01:00
rstoyanchev f4ccf68458 Revert "Use cached playbook in build dir"
This reverts commit 4aa824d456.

See gh-30481
2023-05-23 15:10:24 +01:00
Rob Winch 4aa824d456 Use cached playbook in build dir
Closes gh-30466
2023-05-10 17:38:01 +01:00
rstoyanchev 6a68b4d299 Polishing
Closes gh-30453
2023-05-10 17:36:32 +01:00
Rob Winch 28cc8b7a08 Include future Spring branches and Releases
See gh-30453
2023-05-10 17:36:32 +01:00
Rob Winch 317eee83ac Enable tabs-sync-option
This ensures that the tabs are synced across pages. See
https://github.com/asciidoctor/asciidoctor-tabs#tabs-sync
2023-05-05 17:17:21 +01:00
Rob Winch 81e9a8a26d rwinch to spring-projects 2023-05-04 17:48:59 +01:00
rstoyanchev a2337b73e0 Add main branch to antora-playbook
Closes gh-30415
2023-05-04 15:54:49 +01:00
Rob Winch 8422f0f5b7 Initial 2023-05-03 00:20:21 -05:00
rstoyanchev dc3c016712 Add .gitignore 2023-04-24 15:38:47 +01:00
9402 changed files with 301 additions and 1439670 deletions
-10
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@@ -1,10 +0,0 @@
root = true
[*.{adoc,bat,groovy,html,java,js,jsp,kt,kts,md,properties,py,rb,sh,sql,svg,txt,xml,xsd}]
charset = utf-8
[*.{groovy,java,kt,kts,xml,xsd}]
indent_style = tab
indent_size = 4
continuation_indent_size = 8
end_of_line = lf
-16
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@@ -1,16 +0,0 @@
# Normalize line endings to LF.
* text eol=lf
# Ensure that line endings for multipart files in spring-web are not modified.
*.multipart -text
# Ensure that line endings for DOS batch files are not modified.
*.bat -text
# Ensure the following are treated as binary.
*.gif binary
*.jar binary
*.jpeg binary
*.jpg binary
*.png binary
*.vsd binary
-17
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@@ -1,17 +0,0 @@
<!--
!!! 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.
-->
-32
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@@ -1,32 +0,0 @@
name: Backport Bot
on:
issues:
types: [labeled]
pull_request:
types: [labeled]
push:
branches:
- '*.x'
permissions:
contents: read
jobs:
build:
permissions:
contents: read
issues: write
pull-requests: write
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- uses: actions/setup-java@v3
with:
distribution: 'temurin'
java-version: '17'
- name: Download BackportBot
run: wget https://github.com/spring-io/backport-bot/releases/download/latest/backport-bot-0.0.1-SNAPSHOT.jar
- name: Backport
env:
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"
+57
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@@ -0,0 +1,57 @@
name: Build and Deploy Documentation
run-name: ${{ format('{0} ({1})', github.workflow, github.event.inputs.build-refname || 'all') }}
on:
workflow_dispatch:
inputs:
build-refname:
description: Enter git refname to build (e.g., 5.7.x).
required: false
push:
branches: docs-build
env:
GRADLE_ENTERPRISE_SECRET_ACCESS_KEY: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
permissions: read-all
jobs:
build-and-deploy-docs:
name: Build and Deploy Documentation
if: github.repository_owner == 'spring-projects'
runs-on: ubuntu-latest
steps:
- name: Check Out
uses: actions/checkout@v4
with:
fetch-depth: 5
- name: Set Up Java
uses: actions/setup-java@v4
with:
distribution: 'liberica'
java-version: |
25
17
- name: Set Up Gradle
uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96 # v4.4.1
with:
cache-read-only: false
- name: Set up refname build
if: github.event.inputs.build-refname
run: |
git fetch --depth 1 https://github.com/$GITHUB_REPOSITORY ${{ github.event.inputs.build-refname }}
echo BUILD_REFNAME=${{ github.event.inputs.build-refname }} >> $GITHUB_ENV
echo BUILD_VERSION=$(git cat-file --textconv FETCH_HEAD:gradle.properties | sed -n '/^version=/ { s/^version=//;p }') >> $GITHUB_ENV
- name: Run Antora
run: ./gradlew antora
- name: Copy the cache to be included in the site
run: cp -rf build/antora/inject-collector-cache-config-extension/.cache build/site/
- name: Publish Docs
uses: spring-io/spring-doc-actions/rsync-antora-reference@v0.0.22
with:
docs-username: ${{ secrets.DOCS_USERNAME }}
docs-host: ${{ secrets.DOCS_HOST }}
docs-ssh-key: ${{ secrets.DOCS_SSH_KEY }}
docs-ssh-host-key: ${{ secrets.DOCS_SSH_HOST_KEY }}
- name: Bust Cloudflare Cache
uses: spring-io/spring-doc-actions/bust-cloudflare-antora-cache@v0.0.22
with:
context-root: spring-framework
cloudflare-zone-id: ${{ secrets.CLOUDFLARE_ZONE_ID }}
cloudflare-cache-token: ${{ secrets.CLOUDFLARE_CACHE_TOKEN }}
@@ -1,13 +0,0 @@
name: "Validate Gradle Wrapper"
on: [push, pull_request]
permissions:
contents: read
jobs:
validation:
name: "Validation"
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- uses: gradle/wrapper-validation-action@v1
+4
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@@ -50,3 +50,7 @@ atlassian-ide-plugin.xml
# VS Code
.vscode/
cached-antora-playbook.yml
node_modules
-36
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@@ -1,36 +0,0 @@
Juergen Hoeller <jhoeller@vmware.com>
Juergen Hoeller <jhoeller@vmware.com> <jhoeller@pivotal.io>
Juergen Hoeller <jhoeller@vmware.com> <jhoeller@gopivotal.com>
Rossen Stoyanchev <rstoyanchev@vmware.com>
Rossen Stoyanchev <rstoyanchev@vmware.com> <rstoyanchev@pivotal.io>
Rossen Stoyanchev <rstoyanchev@vmware.com> <rstoyanchev@gopivotal.com>
Phillip Webb <pwebb@vmware.com>
Phillip Webb <pwebb@vmware.com> <pwebb@pivotal.io>
Phillip Webb <pwebb@vmware.com> <pwebb@gopivotal.com>
Chris Beams <cbeams@vmware.com>
Chris Beams <cbeams@vmware.com> <cbeams@pivotal.io>
Chris Beams <cbeams@vmware.com> <cbeams@gopivotal.com>
Arjen Poutsma <poutsmaa@vmware.com>
Arjen Poutsma <poutsmaa@vmware.com> <apoutsma@pivotal.io>
Arjen Poutsma <poutsmaa@vmware.com> <apoutsma@gopivotal.com>
Arjen Poutsma <poutsmaa@vmware.com> <poutsma@mac.com>
Arjen Poutsma <poutsmaa@vmware.com> <apoutsma@vmware.com>
Oliver Drotbohm <odrotbohm@vmware.com>
Oliver Drotbohm <odrotbohm@vmware.com> <ogierke@vmware.com>
Oliver Drotbohm <odrotbohm@vmware.com> <ogierke@pivotal.io>
Oliver Drotbohm <odrotbohm@vmware.com> <ogierke@gopivotal.com>
Dave Syer <dsyer@vmware.com>
Dave Syer <dsyer@vmware.com> <dsyer@pivotal.io>
Dave Syer <dsyer@vmware.com> <dsyer@gopivotal.com>
Dave Syer <dsyer@vmware.com> <david_syer@hotmail.com>
Andy Clement <aclement@vmware.com>
Andy Clement <aclement@vmware.com> <aclement@pivotal.io>
Andy Clement <aclement@vmware.com> <aclement@gopivotal.com>
Andy Clement <aclement@vmware.com> <andrew.clement@gmail.com>
Sam Brannen <sbrannen@vmware.com>
Sam Brannen <sbrannen@vmware.com> <sbrannen@pivotal.io>
Sam Brannen <sbrannen@vmware.com> <sam@sambrannen.com>
Simon Basle <sbasle@vmware.com>
Simon Baslé <sbasle@vmware.com>
<dmitry.katsubo@gmail.com> <dmitry.katsubo@gmai.com>
Nick Williams <nicholas@nicholaswilliams.net>
+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=17.0.6-librca
java=17.0.12-librca
-44
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@@ -1,44 +0,0 @@
= Contributor Code of Conduct
As contributors and maintainers of this project, and in the interest of fostering an open
and welcoming community, we pledge to respect all people who contribute through reporting
issues, posting feature requests, updating documentation, submitting pull requests or
patches, and other activities.
We are committed to making participation in this project a harassment-free experience for
everyone, regardless of level of experience, gender, gender identity and expression,
sexual orientation, disability, personal appearance, body size, race, ethnicity, age,
religion, or nationality.
Examples of unacceptable behavior by participants include:
* The use of sexualized language or imagery
* Personal attacks
* Trolling or insulting/derogatory comments
* Public or private harassment
* Publishing other's private information, such as physical or electronic addresses,
without explicit permission
* Other unethical or unprofessional conduct
Project maintainers have the right and responsibility to remove, edit, or reject comments,
commits, code, wiki edits, issues, and other contributions that are not aligned to this
Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors
that they deem inappropriate, threatening, offensive, or harmful.
By adopting this Code of Conduct, project maintainers commit themselves to fairly and
consistently applying these principles to every aspect of managing this project. Project
maintainers who do not follow or enforce the Code of Conduct may be permanently removed
from the project team.
This Code of Conduct applies both within project spaces and in public spaces when an
individual is representing the project or its community.
Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by
contacting a project maintainer at spring-code-of-conduct@pivotal.io . All complaints will
be reviewed and investigated and will result in a response that is deemed necessary and
appropriate to the circumstances. Maintainers are obligated to maintain confidentiality
with regard to the reporter of an incident.
This Code of Conduct is adapted from the
https://contributor-covenant.org[Contributor Covenant], version 1.3.0, available at
https://contributor-covenant.org/version/1/3/0/[contributor-covenant.org/version/1/3/0/]
-135
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@@ -1,135 +0,0 @@
# Contributing to the Spring Framework
First off, thank you for taking the time to contribute! :+1: :tada:
### Table of Contents
* [Code of Conduct](#code-of-conduct)
* [How to Contribute](#how-to-contribute)
* [Ask questions](#ask-questions)
* [Create an Issue](#create-an-issue)
* [Issue Lifecycle](#issue-lifecycle)
* [Submit a Pull Request](#submit-a-pull-request)
* [Build from Source](#build-from-source)
* [Source Code Style](#source-code-style)
* [Reference Docs](#reference-docs)
### Code of Conduct
This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc).
By participating you are expected to uphold this code.
Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
### How to Contribute
#### Ask questions
If you have a question, check Stack Overflow using
[this list of tags](https://stackoverflow.com/questions/tagged/spring+or+spring-mvc+or+spring-aop+or+spring-jdbc+or+spring-transactions+or+spring-annotations+or+spring-jms+or+spring-el+or+spring-test+or+spring+or+spring-remoting+or+spring-orm+or+spring-jmx+or+spring-cache+or+spring-webflux?tab=Newest). Find an existing discussion, or start a new one if necessary.
If you believe there is an issue, search through
[existing issues](https://github.com/spring-projects/spring-framework/issues) trying a
few different ways to find discussions, past or current, that are related to the issue.
Reading those discussions helps you to learn about the issue, and helps us to make a
decision.
#### Create an Issue
Reporting an issue or making a feature request is a great way to contribute. Your feedback
and the conversations that result from it provide a continuous flow of ideas. However,
before creating a ticket, please take the time to [ask and research](#ask-questions) first.
If you create an issue after a discussion on Stack Overflow, please provide a description
in the issue instead of simply referring to Stack Overflow. The issue tracker is an
important place of record for design discussions and should be self-sufficient.
Once you're ready, create an issue on [GitHub](https://github.com/spring-projects/spring-framework/issues).
Many issues are caused by subtle behavior, typos, and unintended configuration.
Creating a [Minimal Reproducible Example](https://stackoverflow.com/help/minimal-reproducible-example)
(starting with https://start.spring.io for example) of the problem helps the team
quickly triage your issue and get to the core of the problem.
#### Issue Lifecycle
When an issue is first created, it is flagged `waiting-for-triage` waiting for a team
member to triage it. Once the issue has been reviewed, the team may ask for further
information if needed, and based on the findings, the issue is either assigned a target
milestone or is closed with a specific status.
When a fix is ready, the issue is closed and may still be re-opened until the fix is
released. After that the issue will typically no longer be reopened. In rare cases if the
issue was not at all fixed, the issue may be re-opened. In most cases however any
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
created, we will close the issue as superseded by the pull request, and the discussion
about the issue will continue under the pull request.
1. Always check out the `main` branch and submit pull requests against it
(for target version see [settings.gradle](settings.gradle)).
Backports to prior versions will be considered on a case-by-case basis and reflected as
the fix version in the issue tracker.
1. Choose the granularity of your commits consciously and squash commits that represent
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. Format commit messages using 55 characters for the subject line, 72 characters per line
for the description, followed by the issue fixed, e.g. `Closes gh-22276`. See the
[Commit Guidelines section of Pro Git](https://git-scm.com/book/en/Distributed-Git-Contributing-to-a-Project#Commit-Guidelines)
for best practices around commit messages, and use `git log` to see some examples.
1. If there is a prior issue, reference the GitHub issue number in the description of the
pull request.
If accepted, your contribution may be heavily modified as needed prior to merging.
You will likely retain author attribution for your Git commits granted that the bulk of
your changes remain intact. You may also be asked to rework the submission.
If asked to make corrections, simply push the changes against the same branch, and your
pull request will be updated. In other words, you do not need to create a new pull request
when asked to make changes.
#### Participate in Reviews
Helping to review pull requests is another great way to contribute. Your feedback
can help to shape the implementation of new features. When reviewing pull requests,
however, please refrain from approving or rejecting a PR unless you are a core
committer for the Spring Framework.
### Build from Source
See the [Build from Source](https://github.com/spring-projects/spring-framework/wiki/Build-from-Source)
wiki page for instructions on how to check out, build, and import the Spring Framework
source code into your IDE.
### Source Code Style
The wiki pages
[Code Style](https://github.com/spring-projects/spring-framework/wiki/Code-Style) and
[IntelliJ IDEA Editor Settings](https://github.com/spring-projects/spring-framework/wiki/IntelliJ-IDEA-Editor-Settings)
define the source file coding standards we use along with some IDEA editor settings we customize.
### Reference Docs
The reference documentation is in the [framework-docs/src/docs/asciidoc](framework-docs/src/docs/asciidoc) directory, in
[Asciidoctor](https://asciidoctor.org/) format. For trivial changes, you may be able to browse,
edit source files, and submit directly from GitHub.
When making changes locally, execute `./gradlew :framework-docs:asciidoctor` and then browse the result under
`framework-docs/build/docs/ref-docs/html5/index.html`.
Asciidoctor also supports live editing. For more details see
[AsciiDoc Tooling](https://docs.asciidoctor.org/asciidoctor/latest/tooling/).
-202
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@@ -1,202 +0,0 @@
Apache License
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https://www.apache.org/licenses/
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1. Definitions.
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+140
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= Spring Framework Docs Build
You're currently viewing the Antora playbook branch.
The playbook branch hosts the docs build that is used to build and publish the production docs site.
The Spring Framework reference docs are built using https://antora.org[Antora].
This README covers how to build the docs in a software branch as well as how to build the production docs site locally.
== Overview
To prepare your system for building the documentation, <<prerequisites,install the prerequisites>> and then <<build-main,create your workspace and build the main branch documentation>>.
Once you've completed those steps, follow the instructions in <<build-branch,Build the 6.0.x branch documentation>> to learn how to build the documentation for a version branch you haven't previously checked out.
To build the production site documentation on your computer, follow the instructions in <<prerequisites,Prerequisites>>, <<build-main,Build the main branch documentation>>, and then <<build-production,Build the production documentation site>>.
.Branch checkout instead of worktrees
[NOTE]
====
If you prefer to set up your workspace without worktrees, complete the steps in <<prerequisites,Prerequisites>> and clone the project repository onto your computer.
Then follow the instructions in each section starting from the `sdk env || sdk env install` step once you've checked out the desired branch.
====
[#prerequisites]
== Prerequisites (everyone)
These instructions assume you already have basic tools on your system, including bash, zip, unzip, git, and curl.
In addition to these basic tools, you need https://sdkman.io/install[SDKMAN!] installed so that the correct JDK is set for each branch.
. Open your terminal and enter the following command:
+
--
$ curl -s "https://get.sdkman.io" | bash
This command downloads and installs SDKMAN!
Once installation is complete, you should see a command displayed in your terminal that will initiate SDKMAN.
--
. Copy the command displayed in your terminal and run it.
`$HOME` is the path unique to your computer (e.g., _home/my-jam/.sdkman/bin/sdkman-init.sh_).
$ source "$HOME/.sdkman/bin/sdkman-init.sh"
You'll use SDKMAN in the next sections to install and switch to the JDK required for each branch.
Now you're ready to <<build-main,create your workspace>>.
[#build-main]
== Build the main branch documentation (writers)
Your workspace will be the folder that contains the git worktrees of the project.
. In your terminal, create a directory for the project and then change into that directory.
$ mkdir spring-framework
$ cd spring-framework
. Clone the project repository and create the primary worktree for the main branch.
Then change into the new _main_ folder.
$ git clone https://github.com/spring-projects/spring-framework main
$ cd main
. Switch to the required JDK using SDKMAN by running the following command:
+
--
$ sdk env || sdk env install
SDKMAN will switch to the required JDK or install it if it isn't present.
--
. Generate the documentation with Antora using the following command:
+
--
$ ./gradlew -PbuildSrc.skipTests=true :framework-docs:antora
This command will build the documentation, including any generated attributes, for the main branch.
--
. Navigate to _$HOME/spring-framework/main/framework-docs/build/site/index.html_ to view the generated documentation.
[#build-branch]
== Build the 6.0.x branch documentation (writers)
NOTE: The instructions in this section assume you've completed the steps in the <<build-main,previous section>>.
After creating the worktree for the main branch, you can set up a worktree for any other branches you'll work on in the future.
In this section, you'll create a worktree for the 6.0.x branch in your project workspace.
. To add a worktree, you have to be in a worktree.
In your terminal, change to the _main_ folder if you aren't already in it, e.g., _$HOME/spring-framework/main_.
Set up a worktree for the 6.0.x branch and then change into the new directory by running the following commands:
$ git worktree add ../6.0.x 6.0.x --track
$ cd ../6.0.x
. Switch to the required JDK or install it.
$ sdk env || sdk env install
. Generate the documentation with the following command:
+
--
$ ./gradlew -PbuildSrc.skipTests=true :framework-docs:antora
This command will build the documentation, including any generated attributes, for the 6.0.x branch.
--
. Navigate to _$HOME/spring-framework/6.0.x/docs/build/site/index.html_ to view the generated documentation.
[#build-production]
== Build the production documentation site (docs manager)
NOTE: The instructions in this section assume you've <<build-main,prepared your workspace and created the worktree for the main branch>>.
To build the project's production site, you'll set up a worktree for the docs-build branch of the repository.
. To add a worktree, you have to be in a worktree.
In your terminal, change to the _main_ folder if you aren't already in it, e.g., _$HOME/spring-framework/main_.
Run the following command to set up the worktree for the _docs-build_ branch.
Then change into the new _docs-build_ directory.
$ git worktree add ../docs-build docs-build --track
$ cd ../docs-build
. Switch to the required JDK or install it.
$ sdk env || sdk env install
. Generate the documentation for the project's production site using the following command:
+
--
$ ./gradlew antora
This command will build all of the documentation included in the project's production site from the repository on GitHub.
To build the documentation from the current clone, using any worktrees that are available, use the following command instead:
$ ./gradlew antora --playbook local-antora-playbook.yml
--
. Navigate to _$HOME/spring-framework/docs-site/build/site/index.html_ to view the generated documentation.
-38
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# <img src="framework-docs/src/docs/spring-framework.png" width="80" height="80"> Spring Framework [![Build Status](https://ci.spring.io/api/v1/teams/spring-framework/pipelines/spring-framework-6.0.x/jobs/build/badge)](https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-6.0.x?groups=Build") [![Revved up by Gradle Enterprise](https://img.shields.io/badge/Revved%20up%20by-Gradle%20Enterprise-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".
Spring provides everything required beyond the Java programming language for creating enterprise applications for a wide range of scenarios and architectures. Please read the [Overview](https://docs.spring.io/spring/docs/current/spring-framework-reference/overview.html#spring-introduction) section as reference for a more complete introduction.
## Code of Conduct
This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc). By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
## Access to Binaries
For access to artifacts or a distribution zip, see the [Spring Framework Artifacts](https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-Artifacts) wiki page.
## Documentation
The Spring Framework maintains reference documentation ([published](https://docs.spring.io/spring-framework/docs/current/spring-framework-reference/) and [source](framework-docs/src/docs/asciidoc)), GitHub [wiki pages](https://github.com/spring-projects/spring-framework/wiki), and an
[API reference](https://docs.spring.io/spring-framework/docs/current/javadoc-api/). There are also [guides and tutorials](https://spring.io/guides) across Spring projects.
## Micro-Benchmarks
See the [Micro-Benchmarks](https://github.com/spring-projects/spring-framework/wiki/Micro-Benchmarks) wiki page.
## Build from Source
See the [Build from Source](https://github.com/spring-projects/spring-framework/wiki/Build-from-Source) wiki page and the [CONTRIBUTING.md](CONTRIBUTING.md) file.
## Continuous Integration Builds
Information regarding CI builds can be found in the [Spring Framework Concourse pipeline](ci/README.adoc) documentation.
## Stay in Touch
Follow [@SpringCentral](https://twitter.com/springcentral), [@SpringFramework](https://twitter.com/springframework), and its [team members](https://twitter.com/springframework/lists/team/members) on Twitter. In-depth articles can be found at [The Spring Blog](https://spring.io/blog/), and releases are announced via our [news feed](https://spring.io/blog/category/news).
## License
The Spring Framework is released under version 2.0 of the [Apache License](https://www.apache.org/licenses/LICENSE-2.0).
-11
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@@ -1,11 +0,0 @@
# Security Policy
## 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.
+41
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antora:
extensions:
- require: '@springio/antora-extensions'
root_component_name: 'framework'
site:
title: Spring Framework
url: https://docs.spring.io/spring-framework/reference
robots: allow
git:
ensure_git_suffix: false
content:
sources:
- 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}*)']
start_path: framework-docs
asciidoc:
extensions:
- '@asciidoctor/tabs'
- '@springio/asciidoctor-extensions'
- '@springio/asciidoctor-extensions/include-code-extension'
attributes:
page-stackoverflow-url: https://stackoverflow.com/questions/tagged/spring
page-pagination: ''
hide-uri-scheme: '@'
tabs-sync-option: '@'
include-java: 'example$docs-src/main/java/org/springframework/docs'
urls:
latest_version_segment_strategy: redirect:to
latest_version_segment: ''
redirect_facility: httpd
runtime:
log:
failure_level: warn
ui:
bundle:
url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.26/ui-bundle.zip
+6 -171
View File
@@ -1,177 +1,12 @@
plugins {
id 'io.spring.nohttp' version '0.0.11'
id 'io.freefair.aspectj' version '6.5.0.3' apply false
// kotlinVersion is managed in gradle.properties
id 'org.jetbrains.kotlin.plugin.serialization' version "${kotlinVersion}" apply false
id 'org.jetbrains.dokka' version '1.7.20'
id 'org.asciidoctor.jvm.convert' version '3.3.2' apply false
id 'org.asciidoctor.jvm.pdf' version '3.3.2' apply false
id 'org.unbroken-dome.xjc' version '2.0.0' apply false
id 'com.github.ben-manes.versions' version '0.42.0'
id 'com.github.johnrengelman.shadow' version '7.1.2' apply false
id 'de.undercouch.download' version '5.1.0'
id 'me.champeau.jmh' version '0.6.8' apply false
id 'base'
id 'org.antora' version '1.0.0'
}
ext {
moduleProjects = subprojects.findAll { it.name.startsWith("spring-") }
javaProjects = subprojects - project(":framework-bom") - project(":framework-platform")
antora {
options = [clean: true, fetch: true, stacktrace: true]
}
configure(allprojects) { project ->
repositories {
mavenCentral()
maven {
url "https://repo.spring.io/milestone"
content {
// Netty 5 optional support
includeGroup 'io.projectreactor.netty'
}
}
maven { url "https://repo.spring.io/libs-spring-framework-build" }
if (version.contains('-')) {
maven { url "https://repo.spring.io/milestone" }
}
if (version.endsWith('-SNAPSHOT')) {
maven { url "https://repo.spring.io/snapshot" }
}
}
configurations.all {
resolutionStrategy {
cacheChangingModulesFor 0, "seconds"
cacheDynamicVersionsFor 0, "seconds"
}
}
}
configure([rootProject] + javaProjects) { project ->
group = "org.springframework"
apply plugin: "java"
apply plugin: "java-test-fixtures"
apply plugin: "checkstyle"
apply plugin: 'org.springframework.build.conventions'
apply from: "${rootDir}/gradle/toolchains.gradle"
apply from: "${rootDir}/gradle/ide.gradle"
configurations {
dependencyManagement {
canBeConsumed = false
canBeResolved = false
visible = false
}
matching { it.name.endsWith("Classpath") }.all { it.extendsFrom(dependencyManagement) }
}
test {
useJUnitPlatform()
include(["**/*Tests.class", "**/*Test.class"])
systemProperty("java.awt.headless", "true")
systemProperty("testGroups", project.properties.get("testGroups"))
systemProperty("io.netty.leakDetection.level", "paranoid")
systemProperty("io.netty5.leakDetectionLevel", "paranoid")
systemProperty("io.netty5.leakDetection.targetRecords", "32")
systemProperty("io.netty5.buffer.lifecycleTracingEnabled", "true")
systemProperty("io.netty5.buffer.leakDetectionEnabled", "true")
jvmArgs(["--add-opens=java.base/java.lang=ALL-UNNAMED",
"--add-opens=java.base/java.util=ALL-UNNAMED"])
}
checkstyle {
toolVersion = "10.7.0"
configDirectory.set(rootProject.file("src/checkstyle"))
}
tasks.named("checkstyleMain").configure {
maxHeapSize = "1g"
}
tasks.named("checkstyleTest").configure {
maxHeapSize = "1g"
}
dependencies {
dependencyManagement(enforcedPlatform(dependencies.project(path: ":framework-platform")))
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-slf4j-impl")
// JSR-305 only used for non-required meta-annotations
compileOnly("com.google.code.findbugs:jsr305")
testCompileOnly("com.google.code.findbugs:jsr305")
checkstyle("io.spring.javaformat:spring-javaformat-checkstyle:0.0.31")
}
ext.javadocLinks = [
"https://docs.oracle.com/en/java/javase/17/docs/api/",
"https://jakarta.ee/specifications/platform/9/apidocs/",
"https://docs.oracle.com/cd/E13222_01/wls/docs90/javadocs/", // CommonJ
"https://www.ibm.com/docs/api/v1/content/SSEQTP_8.5.5/com.ibm.websphere.javadoc.doc/web/apidocs/",
"https://docs.jboss.org/jbossas/javadoc/4.0.5/connector/",
"https://docs.jboss.org/jbossas/javadoc/7.1.2.Final/",
"https://www.eclipse.org/aspectj/doc/released/aspectj5rt-api/",
"https://www.quartz-scheduler.org/api/2.3.0/",
"https://www.javadoc.io/doc/com.fasterxml.jackson.core/jackson-core/2.14.1/",
"https://www.javadoc.io/doc/com.fasterxml.jackson.core/jackson-databind/2.14.1/",
"https://www.javadoc.io/doc/com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.14.1/",
"https://hc.apache.org/httpcomponents-client-5.2.x/current/httpclient5/apidocs/",
"https://projectreactor.io/docs/test/release/api/",
"https://junit.org/junit4/javadoc/4.13.2/",
// TODO Uncomment link to JUnit 5 docs once we have sorted out
// the following warning in the build.
//
// warning: The code being documented uses packages in the unnamed module, but the packages defined in https://junit.org/junit5/docs/5.9.2/api/ are in named modules.
//
// "https://junit.org/junit5/docs/5.9.2/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/",
// The external Javadoc link for JSR 305 must come last to ensure that types from
// JSR 250 (such as @PostConstruct) are still supported. This is due to the fact
// that JSR 250 and JSR 305 both define types in javax.annotation, which results
// in a split package, and the javadoc tool does not support split packages
// across multiple external Javadoc sites.
"https://www.javadoc.io/doc/com.google.code.findbugs/jsr305/3.0.2/"
] as String[]
}
configure(moduleProjects) { project ->
apply from: "${rootDir}/gradle/spring-module.gradle"
}
configure(rootProject) {
description = "Spring Framework"
apply plugin: "io.spring.nohttp"
apply plugin: 'org.springframework.build.api-diff'
nohttp {
source.exclude "**/test-output/**"
allowlistFile = project.file("src/nohttp/allowlist.lines")
def rootPath = file(rootDir).toPath()
def projectDirs = allprojects.collect { it.projectDir } + "${rootDir}/buildSrc"
projectDirs.forEach { dir ->
[ 'bin', 'build', 'out', '.settings' ]
.collect { rootPath.relativize(new File(dir, it).toPath()) }
.forEach { source.exclude "$it/**" }
[ '.classpath', '.project' ]
.collect { rootPath.relativize(new File(dir, it).toPath()) }
.forEach { source.exclude "$it" }
}
}
tasks.named("checkstyleNohttp").configure {
maxHeapSize = "1g"
}
node {
version = '24.15.0'
}
-75
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@@ -1,75 +0,0 @@
# Spring Framework Build
This folder contains the custom plugins and conventions for the Spring Framework build.
They are declared in the `build.gradle` file in this folder.
## Build Conventions
The `org.springframework.build.conventions` plugin applies all conventions to the Framework build:
* Configuring the Java compiler, see `JavaConventions`
* Configuring the Kotlin compiler, see `KotlinConventions`
* Configuring testing in the build with `TestConventions`
## Build Plugins
### Optional dependencies
The `org.springframework.build.optional-dependencies` plugin creates a new `optional`
Gradle configuration - it adds the dependencies to the project's compile and runtime classpath
but doesn't affect the classpath of dependent projects.
This plugin does not provide a `provided` configuration, as the native `compileOnly` and `testCompileOnly`
configurations are preferred.
### API Diff
This plugin uses the [Gradle JApiCmp](https://github.com/melix/japicmp-gradle-plugin) plugin
to generate API Diff reports for each Spring Framework module. This plugin is applied once on the root
project and creates tasks in each framework module. Unlike previous versions of this part of the build,
there is no need for checking out a specific tag. The plugin will fetch the JARs we want to compare the
current working version with. You can generate the reports for all modules or a single module:
```
./gradlew apiDiff -PbaselineVersion=5.1.0.RELEASE
./gradlew :spring-core:apiDiff -PbaselineVersion=5.1.0.RELEASE
```
The reports are located under `build/reports/api-diff/$OLDVERSION_to_$NEWVERSION/`.
### RuntimeHints Java Agent
The `spring-core-test` project module contributes the `RuntimeHintsAgent` Java agent.
The `RuntimeHintsAgentPlugin` Gradle plugin creates a dedicated `"runtimeHintsTest"` test task for each project.
This task will detect and execute [tests tagged](https://junit.org/junit5/docs/current/user-guide/#running-tests-build-gradle)
with the `"RuntimeHintsTests"` [JUnit tag](https://junit.org/junit5/docs/current/user-guide/#running-tests-tags).
In the Spring Framework test suite, those are usually annotated with the `@EnabledIfRuntimeHintsAgent` annotation.
By default, the agent will instrument all classes located in the `"org.springframework"` package, as they are loaded.
The `RuntimeHintsAgentExtension` allows to customize this using a DSL:
```groovy
// this applies the `RuntimeHintsAgentPlugin` to the project
plugins {
id 'org.springframework.build.runtimehints-agent'
}
// You can configure the agent to include and exclude packages from the instrumentation process.
runtimeHintsAgent {
includedPackages = ["org.springframework", "io.spring"]
excludedPackages = ["org.example"]
}
dependencies {
// to use the test infrastructure, the project should also depend on the "spring-core-test" module
testImplementation(project(":spring-core-test"))
}
```
With this configuration, `./gradlew runtimeHintsTest` will run all tests instrumented by this java agent.
The global `./gradlew check` task depends on `runtimeHintsTest`.
NOTE: the "spring-core-test" module doesn't shade "spring-core" by design, so the agent should never instrument
code that doesn't have "spring-core" on its classpath.
-45
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@@ -1,45 +0,0 @@
plugins {
id 'java-gradle-plugin'
}
repositories {
mavenCentral()
gradlePluginPortal()
}
ext {
def propertiesFile = new File(new File("$projectDir").parentFile, "gradle.properties")
propertiesFile.withInputStream {
def properties = new Properties()
properties.load(it)
set("kotlinVersion", properties["kotlinVersion"])
}
}
dependencies {
implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
implementation("org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}")
implementation "me.champeau.gradle:japicmp-gradle-plugin:0.3.0"
implementation "org.gradle:test-retry-gradle-plugin:1.4.1"
}
gradlePlugin {
plugins {
apiDiffPlugin {
id = "org.springframework.build.api-diff"
implementationClass = "org.springframework.build.api.ApiDiffPlugin"
}
conventionsPlugin {
id = "org.springframework.build.conventions"
implementationClass = "org.springframework.build.ConventionsPlugin"
}
optionalDependenciesPlugin {
id = "org.springframework.build.optional-dependencies"
implementationClass = "org.springframework.build.optional.OptionalDependenciesPlugin"
}
runtimeHintsAgentPlugin {
id = "org.springframework.build.runtimehints-agent"
implementationClass = "org.springframework.build.hint.RuntimeHintsAgentPlugin"
}
}
}
-1
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@@ -1 +0,0 @@
org.gradle.caching=true
View File
@@ -1,45 +0,0 @@
/*
* 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.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.plugins.JavaBasePlugin;
import org.jetbrains.kotlin.gradle.plugin.KotlinBasePlugin;
/**
* Plugin to apply conventions to projects that are part of Spring Framework's build.
* Conventions are applied in response to various plugins being applied.
*
* When the {@link JavaBasePlugin} is applied, the conventions in {@link TestConventions}
* are applied.
* When the {@link JavaBasePlugin} is applied, the conventions in {@link JavaConventions}
* are applied.
* When the {@link KotlinBasePlugin} is applied, the conventions in {@link KotlinConventions}
* are applied.
*
* @author Brian Clozel
*/
public class ConventionsPlugin implements Plugin<Project> {
@Override
public void apply(Project project) {
new JavaConventions().apply(project);
new KotlinConventions().apply(project);
new TestConventions().apply(project);
}
}
@@ -1,86 +0,0 @@
/*
* 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.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.plugins.JavaBasePlugin;
import org.gradle.api.plugins.JavaPlugin;
import org.gradle.api.tasks.compile.JavaCompile;
/**
* {@link Plugin} that applies conventions for compiling Java sources in Spring Framework.
*
* @author Brian Clozel
* @author Sam Brannen
* @author Sebastien Deleuze
*/
public class JavaConventions {
private static final List<String> COMPILER_ARGS;
private static final List<String> TEST_COMPILER_ARGS;
static {
List<String> commonCompilerArgs = Arrays.asList(
"-Xlint:serial", "-Xlint:cast", "-Xlint:classfile", "-Xlint:dep-ann",
"-Xlint:divzero", "-Xlint:empty", "-Xlint:finally", "-Xlint:overrides",
"-Xlint:path", "-Xlint:processing", "-Xlint:static", "-Xlint:try", "-Xlint:-options",
"-parameters"
);
COMPILER_ARGS = new ArrayList<>();
COMPILER_ARGS.addAll(commonCompilerArgs);
COMPILER_ARGS.addAll(Arrays.asList(
"-Xlint:varargs", "-Xlint:fallthrough", "-Xlint:rawtypes", "-Xlint:deprecation",
"-Xlint:unchecked", "-Werror"
));
TEST_COMPILER_ARGS = new ArrayList<>();
TEST_COMPILER_ARGS.addAll(commonCompilerArgs);
TEST_COMPILER_ARGS.addAll(Arrays.asList("-Xlint:-varargs", "-Xlint:-fallthrough", "-Xlint:-rawtypes",
"-Xlint:-deprecation", "-Xlint:-unchecked"));
}
public void apply(Project project) {
project.getPlugins().withType(JavaBasePlugin.class, javaPlugin -> applyJavaCompileConventions(project));
}
/**
* Applies the common Java compiler options for main sources, test fixture sources, and
* test sources.
* @param project the current project
*/
private void applyJavaCompileConventions(Project project) {
project.getTasks().withType(JavaCompile.class)
.matching(compileTask -> compileTask.getName().equals(JavaPlugin.COMPILE_JAVA_TASK_NAME))
.forEach(compileTask -> {
compileTask.getOptions().setCompilerArgs(COMPILER_ARGS);
compileTask.getOptions().setEncoding("UTF-8");
});
project.getTasks().withType(JavaCompile.class)
.matching(compileTask -> compileTask.getName().equals(JavaPlugin.COMPILE_TEST_JAVA_TASK_NAME)
|| compileTask.getName().equals("compileTestFixturesJava"))
.forEach(compileTask -> {
compileTask.getOptions().setCompilerArgs(TEST_COMPILER_ARGS);
compileTask.getOptions().setEncoding("UTF-8");
});
}
}
@@ -1,48 +0,0 @@
/*
* 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.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build;
import java.util.ArrayList;
import java.util.List;
import org.gradle.api.Project;
import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions;
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile;
/**
* @author Brian Clozel
*/
public class KotlinConventions {
void apply(Project project) {
project.getPlugins().withId("org.jetbrains.kotlin.jvm",
(plugin) -> project.getTasks().withType(KotlinCompile.class, this::configure));
}
private void configure(KotlinCompile compile) {
KotlinJvmOptions kotlinOptions = compile.getKotlinOptions();
kotlinOptions.setApiVersion("1.7");
kotlinOptions.setLanguageVersion("1.7");
kotlinOptions.setJvmTarget("17");
kotlinOptions.setJavaParameters(true);
kotlinOptions.setAllWarningsAsErrors(true);
List<String> freeCompilerArgs = new ArrayList<>(compile.getKotlinOptions().getFreeCompilerArgs());
freeCompilerArgs.addAll(List.of("-Xsuppress-version-warnings", "-Xjsr305=strict", "-opt-in=kotlin.RequiresOptIn"));
compile.getKotlinOptions().setFreeCompilerArgs(freeCompilerArgs);
}
}
@@ -1,55 +0,0 @@
/*
* Copyright 2002-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build;
import org.gradle.api.Project;
import org.gradle.api.plugins.JavaBasePlugin;
import org.gradle.api.tasks.testing.Test;
import org.gradle.testretry.TestRetryPlugin;
import org.gradle.testretry.TestRetryTaskExtension;
/**
* Conventions that are applied in the presence of the {@link JavaBasePlugin}. When the
* plugin is applied:
* <ul>
* <li>The {@link TestRetryPlugin Test Retry} plugins is applied so that flaky tests
* are retried 3 times when running on the CI.
* </ul>
*
* @author Brian Clozel
* @author Andy Wilkinson
*/
class TestConventions {
void apply(Project project) {
project.getPlugins().withType(JavaBasePlugin.class, (java) -> configureTestConventions(project));
}
private void configureTestConventions(Project project) {
project.getTasks().withType(Test.class,
(test) -> project.getPlugins().withType(TestRetryPlugin.class, (testRetryPlugin) -> {
TestRetryTaskExtension testRetry = test.getExtensions().getByType(TestRetryTaskExtension.class);
testRetry.getFailOnPassedAfterRetry().set(true);
testRetry.getMaxRetries().set(isCi() ? 3 : 0);
}));
}
private boolean isCi() {
return Boolean.parseBoolean(System.getenv("CI"));
}
}
@@ -1,140 +0,0 @@
/*
* Copyright 2002-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build.api;
import java.io.File;
import java.net.URI;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Collections;
import java.util.List;
import me.champeau.gradle.japicmp.JapicmpPlugin;
import me.champeau.gradle.japicmp.JapicmpTask;
import org.gradle.api.GradleException;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.artifacts.Dependency;
import org.gradle.api.plugins.JavaBasePlugin;
import org.gradle.api.plugins.JavaPlugin;
import org.gradle.api.publish.maven.plugins.MavenPublishPlugin;
import org.gradle.api.tasks.TaskProvider;
import org.gradle.jvm.tasks.Jar;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* {@link Plugin} that applies the {@code "japicmp-gradle-plugin"}
* and create tasks for all subprojects named {@code "spring-*"}, diffing the public API one by one
* and creating the reports in {@code "build/reports/api-diff/$OLDVERSION_to_$NEWVERSION/"}.
* <p>{@code "./gradlew apiDiff -PbaselineVersion=5.1.0.RELEASE"} will output the
* reports for the API diff between the baseline version and the current one for all modules.
* You can limit the report to a single module with
* {@code "./gradlew :spring-core:apiDiff -PbaselineVersion=5.1.0.RELEASE"}.
*
* @author Brian Clozel
*/
public class ApiDiffPlugin implements Plugin<Project> {
private static final Logger logger = LoggerFactory.getLogger(ApiDiffPlugin.class);
public static final String TASK_NAME = "apiDiff";
private static final String BASELINE_VERSION_PROPERTY = "baselineVersion";
private static final List<String> PACKAGE_INCLUDES = Collections.singletonList("org.springframework.*");
private static final URI SPRING_MILESTONE_REPOSITORY = URI.create("https://repo.spring.io/milestone");
@Override
public void apply(Project project) {
if (project.hasProperty(BASELINE_VERSION_PROPERTY) && project.equals(project.getRootProject())) {
project.getPluginManager().apply(JapicmpPlugin.class);
project.getPlugins().withType(JapicmpPlugin.class,
plugin -> applyApiDiffConventions(project));
}
}
private void applyApiDiffConventions(Project project) {
String baselineVersion = project.property(BASELINE_VERSION_PROPERTY).toString();
project.subprojects(subProject -> {
if (subProject.getName().startsWith("spring-")) {
createApiDiffTask(baselineVersion, subProject);
}
});
}
private void createApiDiffTask(String baselineVersion, Project project) {
if (isProjectEligible(project)) {
// Add Spring Milestone repository for generating diffs against previous milestones
project.getRootProject()
.getRepositories()
.maven(mavenArtifactRepository -> mavenArtifactRepository.setUrl(SPRING_MILESTONE_REPOSITORY));
JapicmpTask apiDiff = project.getTasks().create(TASK_NAME, JapicmpTask.class);
apiDiff.setDescription("Generates an API diff report with japicmp");
apiDiff.setGroup(JavaBasePlugin.DOCUMENTATION_GROUP);
apiDiff.setOldClasspath(createBaselineConfiguration(baselineVersion, project));
TaskProvider<Jar> jar = project.getTasks().withType(Jar.class).named("jar");
apiDiff.setNewArchives(project.getLayout().files(jar.get().getArchiveFile().get().getAsFile()));
apiDiff.setNewClasspath(getRuntimeClassPath(project));
apiDiff.setPackageIncludes(PACKAGE_INCLUDES);
apiDiff.setOnlyModified(true);
apiDiff.setIgnoreMissingClasses(true);
// Ignore Kotlin metadata annotations since they contain
// illegal HTML characters and fail the report generation
apiDiff.setAnnotationExcludes(Collections.singletonList("@kotlin.Metadata"));
apiDiff.setHtmlOutputFile(getOutputFile(baselineVersion, project));
apiDiff.dependsOn(project.getTasks().getByName("jar"));
}
}
private boolean isProjectEligible(Project project) {
return project.getPlugins().hasPlugin(JavaPlugin.class)
&& project.getPlugins().hasPlugin(MavenPublishPlugin.class);
}
private Configuration createBaselineConfiguration(String baselineVersion, Project project) {
String baseline = String.join(":",
project.getGroup().toString(), project.getName(), baselineVersion);
Dependency baselineDependency = project.getDependencies().create(baseline + "@jar");
Configuration baselineConfiguration = project.getRootProject().getConfigurations().detachedConfiguration(baselineDependency);
try {
// eagerly resolve the baseline configuration to check whether this is a new Spring module
baselineConfiguration.resolve();
return baselineConfiguration;
}
catch (GradleException exception) {
logger.warn("Could not resolve {} - assuming this is a new Spring module.", baseline);
}
return project.getRootProject().getConfigurations().detachedConfiguration();
}
private Configuration getRuntimeClassPath(Project project) {
return project.getConfigurations().getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME);
}
private File getOutputFile(String baseLineVersion, Project project) {
Path outDir = Paths.get(project.getRootProject().getBuildDir().getAbsolutePath(),
"reports", "api-diff",
baseLineVersion + "_to_" + project.getRootProject().getVersion());
return project.file(outDir.resolve(project.getName() + ".html").toString());
}
}
@@ -1,53 +0,0 @@
/*
* 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.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build.hint;
import java.util.Collections;
import org.gradle.api.model.ObjectFactory;
import org.gradle.api.provider.SetProperty;
/**
* Entry point to the DSL extension for the {@link RuntimeHintsAgentPlugin} Gradle plugin.
* @author Brian Clozel
*/
public class RuntimeHintsAgentExtension {
private final SetProperty<String> includedPackages;
private final SetProperty<String> excludedPackages;
public RuntimeHintsAgentExtension(ObjectFactory objectFactory) {
this.includedPackages = objectFactory.setProperty(String.class).convention(Collections.singleton("org.springframework"));
this.excludedPackages = objectFactory.setProperty(String.class).convention(Collections.emptySet());
}
public SetProperty<String> getIncludedPackages() {
return this.includedPackages;
}
public SetProperty<String> getExcludedPackages() {
return this.excludedPackages;
}
String asJavaAgentArgument() {
StringBuilder builder = new StringBuilder();
this.includedPackages.get().forEach(packageName -> builder.append('+').append(packageName).append(','));
this.excludedPackages.get().forEach(packageName -> builder.append('-').append(packageName).append(','));
return builder.toString();
}
}
@@ -1,56 +0,0 @@
/*
* 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.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build.hint;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.plugins.JavaPlugin;
import org.gradle.api.tasks.bundling.Jar;
import org.gradle.api.tasks.testing.Test;
/**
* {@link Plugin} that configures the {@code RuntimeHints} Java agent to test tasks.
*
* @author Brian Clozel
*/
public class RuntimeHintsAgentPlugin implements Plugin<Project> {
public static final String RUNTIMEHINTS_TEST_TASK = "runtimeHintsTest";
private static final String EXTENSION_NAME = "runtimeHintsAgent";
@Override
public void apply(Project project) {
project.getPlugins().withType(JavaPlugin.class, javaPlugin -> {
RuntimeHintsAgentExtension agentExtension = project.getExtensions().create(EXTENSION_NAME,
RuntimeHintsAgentExtension.class, project.getObjects());
Test agentTest = project.getTasks().create(RUNTIMEHINTS_TEST_TASK, Test.class, test -> {
test.useJUnitPlatform(options -> {
options.includeTags("RuntimeHintsTests");
});
test.include("**/*Tests.class", "**/*Test.class");
test.systemProperty("java.awt.headless", "true");
});
project.afterEvaluate(p -> {
Jar jar = project.getRootProject().project("spring-core-test").getTasks().withType(Jar.class).named("jar").get();
agentTest.jvmArgs("-javaagent:" + jar.getArchiveFile().get().getAsFile() + "=" + agentExtension.asJavaAgentArgument());
});
project.getTasks().getByName("check", task -> task.dependsOn(agentTest));
});
}
}
@@ -1,56 +0,0 @@
/*
* Copyright 2002-2021 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.build.optional;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.plugins.JavaPlugin;
import org.gradle.api.plugins.JavaPluginExtension;
import org.gradle.api.tasks.SourceSetContainer;
/**
* A {@code Plugin} that adds support for Maven-style optional dependencies. Creates a new
* {@code optional} configuration. The {@code optional} configuration is part of the
* project's compile and runtime classpaths but does not affect the classpath of
* dependent projects.
*
* @author Andy Wilkinson
*/
public class OptionalDependenciesPlugin implements Plugin<Project> {
/**
* Name of the {@code optional} configuration.
*/
public static final String OPTIONAL_CONFIGURATION_NAME = "optional";
@Override
public void apply(Project project) {
Configuration optional = project.getConfigurations().create("optional");
optional.setCanBeConsumed(false);
optional.setCanBeResolved(false);
project.getPlugins().withType(JavaPlugin.class, (javaPlugin) -> {
SourceSetContainer sourceSets = project.getExtensions().getByType(JavaPluginExtension.class)
.getSourceSets();
sourceSets.all((sourceSet) -> {
project.getConfigurations().getByName(sourceSet.getCompileClasspathConfigurationName()).extendsFrom(optional);
project.getConfigurations().getByName(sourceSet.getRuntimeClasspathConfigurationName()).extendsFrom(optional);
});
});
}
}
@@ -1,175 +0,0 @@
package org.springframework.build.shadow;
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.gradle.api.DefaultTask;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.artifacts.component.ModuleComponentSelector;
import org.gradle.api.artifacts.query.ArtifactResolutionQuery;
import org.gradle.api.artifacts.result.ArtifactResolutionResult;
import org.gradle.api.artifacts.result.ComponentArtifactsResult;
import org.gradle.api.artifacts.result.DependencyResult;
import org.gradle.api.artifacts.result.ResolutionResult;
import org.gradle.api.artifacts.result.ResolvedArtifactResult;
import org.gradle.api.file.DirectoryProperty;
import org.gradle.api.file.FileCopyDetails;
import org.gradle.api.file.FileTree;
import org.gradle.api.tasks.Classpath;
import org.gradle.api.tasks.Input;
import org.gradle.api.tasks.Nested;
import org.gradle.api.tasks.Optional;
import org.gradle.api.tasks.OutputDirectory;
import org.gradle.api.tasks.TaskAction;
import org.gradle.jvm.JvmLibrary;
import org.gradle.language.base.artifact.SourcesArtifact;
/**
* Gradle task to add source from shadowed jars into our own source jars.
*
* @author Phillip Webb
* @author Andy Wilkinson
*/
public class ShadowSource extends DefaultTask {
private final DirectoryProperty outputDirectory = getProject().getObjects().directoryProperty();
private List<Configuration> configurations = new ArrayList<>();
private final List<Relocation> relocations = new ArrayList<>();
@Classpath
@Optional
public List<Configuration> getConfigurations() {
return this.configurations;
}
public void setConfigurations(List<Configuration> configurations) {
this.configurations = configurations;
}
@Nested
public List<Relocation> getRelocations() {
return this.relocations;
}
public void relocate(String pattern, String destination) {
this.relocations.add(new Relocation(pattern, destination));
}
@OutputDirectory
DirectoryProperty getOutputDirectory() {
return this.outputDirectory;
}
@TaskAction
void syncSourceJarFiles() {
sync(getSourceJarFiles());
}
private List<File> getSourceJarFiles() {
List<File> sourceJarFiles = new ArrayList<>();
for (Configuration configuration : this.configurations) {
ResolutionResult resolutionResult = configuration.getIncoming().getResolutionResult();
resolutionResult.getRootComponent().get().getDependencies().forEach(dependency -> {
Set<ComponentArtifactsResult> artifactsResults = resolveSourceArtifacts(dependency);
for (ComponentArtifactsResult artifactResult : artifactsResults) {
artifactResult.getArtifacts(SourcesArtifact.class).forEach(sourceArtifact -> {
sourceJarFiles.add(((ResolvedArtifactResult) sourceArtifact).getFile());
});
}
});
}
return Collections.unmodifiableList(sourceJarFiles);
}
private Set<ComponentArtifactsResult> resolveSourceArtifacts(DependencyResult dependency) {
ModuleComponentSelector componentSelector = (ModuleComponentSelector) dependency.getRequested();
ArtifactResolutionQuery query = getProject().getDependencies().createArtifactResolutionQuery()
.forModule(componentSelector.getGroup(), componentSelector.getModule(), componentSelector.getVersion());
return executeQuery(query).getResolvedComponents();
}
@SuppressWarnings("unchecked")
private ArtifactResolutionResult executeQuery(ArtifactResolutionQuery query) {
return query.withArtifacts(JvmLibrary.class, SourcesArtifact.class).execute();
}
private void sync(List<File> sourceJarFiles) {
getProject().sync(spec -> {
spec.into(this.outputDirectory);
spec.eachFile(this::relocateFile);
spec.filter(this::transformContent);
spec.exclude("META-INF/**");
spec.setIncludeEmptyDirs(false);
sourceJarFiles.forEach(sourceJar -> spec.from(zipTree(sourceJar)));
});
}
private void relocateFile(FileCopyDetails details) {
String path = details.getPath();
for (Relocation relocation : this.relocations) {
path = relocation.relocatePath(path);
}
details.setPath(path);
}
private String transformContent(String content) {
for (Relocation relocation : this.relocations) {
content = relocation.transformContent(content);
}
return content;
}
private FileTree zipTree(File sourceJar) {
return getProject().zipTree(sourceJar);
}
/**
* A single relocation.
*/
static class Relocation {
private final String pattern;
private final String pathPattern;
private final String destination;
private final String pathDestination;
Relocation(String pattern, String destination) {
this.pattern = pattern;
this.pathPattern = pattern.replace('.', '/');
this.destination = destination;
this.pathDestination = destination.replace('.', '/');
}
@Input
public String getPattern() {
return this.pattern;
}
@Input
public String getDestination() {
return this.destination;
}
String relocatePath(String path) {
return path.replace(this.pathPattern, this.pathDestination);
}
public String transformContent(String content) {
return content.replaceAll("\\b" + this.pattern, this.destination);
}
}
}
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== Spring Framework Concourse pipeline
The Spring Framework uses https://concourse-ci.org/[Concourse] for its CI build and other automated tasks.
The Spring team has a dedicated Concourse instance available at https://ci.spring.io with a build pipeline
for https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-6.0.x[Spring Framework 6.0.x].
=== Setting up your development environment
If you're part of the Spring Framework project on GitHub, you can get access to CI management features.
First, you need to go to https://ci.spring.io and install the client CLI for your platform (see bottom right of the screen).
You can then login with the instance using:
[source]
----
$ fly -t spring login -n spring-framework -c https://ci.spring.io
----
Once logged in, you should get something like:
[source]
----
$ fly ts
name url team expiry
spring https://ci.spring.io spring-framework Wed, 25 Mar 2020 17:45:26 UTC
----
=== Pipeline configuration and structure
The build pipelines are described in `pipeline.yml` file.
This file is listing Concourse resources, i.e. build inputs and outputs such as container images, artifact repositories, source repositories, notification services, etc.
It also describes jobs (a job is a sequence of inputs, tasks and outputs); jobs are organized by groups.
The `pipeline.yml` definition contains `((parameters))` which are loaded from the `parameters.yml` file or from our https://docs.cloudfoundry.org/credhub/[credhub instance].
You'll find in this folder the following resources:
* `pipeline.yml` the build pipeline
* `parameters.yml` the build parameters used for the pipeline
* `images/` holds the container images definitions used in this pipeline
* `scripts/` holds the build scripts that ship within the CI container images
* `tasks` contains the task definitions used in the main `pipeline.yml`
=== Updating the build pipeline
Updating files on the repository is not enough to update the build pipeline, as changes need to be applied.
The pipeline can be deployed using the following command:
[source]
----
$ fly -t spring set-pipeline -p spring-framework-6.0.x -c ci/pipeline.yml -l ci/parameters.yml
----
NOTE: This assumes that you have credhub integration configured with the appropriate secrets.
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changelog:
repository: spring-projects/spring-framework
sections:
- title: ":star: New Features"
labels:
- "type: enhancement"
- title: ":lady_beetle: Bug Fixes"
labels:
- "type: bug"
- "type: regression"
- title: ":notebook_with_decorative_cover: Documentation"
labels:
- "type: documentation"
- title: ":hammer: Dependency Upgrades"
sort: "title"
labels:
- "type: dependency-upgrade"
contributors:
exclude:
names: ["bclozel", "jhoeller", "poutsma", "rstoyanchev", "sbrannen", "sdeleuze", "snicoll", "simonbasle"]
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logging:
level:
io.spring.concourse: DEBUG
spring:
main:
banner-mode: off
sonatype:
exclude:
- 'build-info\.json'
- '.*\.zip'
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== CI Images
These images are used by CI to run the actual builds.
To build the image locally run the following from this directory:
----
$ docker build --no-cache -f <image-folder>/Dockerfile .
----
For example
----
$ docker build --no-cache -f spring-framework-ci-image/Dockerfile .
----
To test run:
----
$ docker run -it --entrypoint /bin/bash <SHA>
----
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FROM ubuntu:focal-20220922
ADD setup.sh /setup.sh
ADD get-jdk-url.sh /get-jdk-url.sh
RUN ./setup.sh
ENV JAVA_HOME /opt/openjdk/java17
ENV JDK17 /opt/openjdk/java17
ENV JDK19 /opt/openjdk/java19
ENV PATH $JAVA_HOME/bin:$PATH
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#!/bin/bash
set -e
case "$1" in
java17)
echo "https://github.com/bell-sw/Liberica/releases/download/17.0.6+10/bellsoft-jdk17.0.6+10-linux-amd64.tar.gz"
;;
java19)
echo "https://github.com/bell-sw/Liberica/releases/download/19.0.2+9/bellsoft-jdk19.0.2+9-linux-amd64.tar.gz"
;;
*)
echo $"Unknown java version"
exit 1
esac
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#!/bin/bash
set -ex
###########################################################
# UTILS
###########################################################
export DEBIAN_FRONTEND=noninteractive
apt-get update
apt-get install --no-install-recommends -y tzdata ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq fontconfig
ln -fs /usr/share/zoneinfo/UTC /etc/localtime
dpkg-reconfigure --frontend noninteractive tzdata
rm -rf /var/lib/apt/lists/*
curl https://raw.githubusercontent.com/spring-io/concourse-java-scripts/v0.0.4/concourse-java.sh > /opt/concourse-java.sh
###########################################################
# JAVA
###########################################################
mkdir -p /opt/openjdk
pushd /opt/openjdk > /dev/null
for jdk in java17 java19
do
JDK_URL=$( /get-jdk-url.sh $jdk )
mkdir $jdk
pushd $jdk > /dev/null
curl -L ${JDK_URL} | tar zx --strip-components=1
test -f bin/java
test -f bin/javac
popd > /dev/null
done
popd
###########################################################
# GRADLE ENTERPRISE
###########################################################
cd /
mkdir ~/.gradle
echo 'systemProp.user.name=concourse' > ~/.gradle/gradle.properties
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github-repo: "https://github.com/spring-projects/spring-framework.git"
github-repo-name: "spring-projects/spring-framework"
sonatype-staging-profile: "org.springframework"
docker-hub-organization: "springci"
artifactory-server: "https://repo.spring.io"
branch: "main"
milestone: "6.0.x"
build-name: "spring-framework"
pipeline-name: "spring-framework"
concourse-url: "https://ci.spring.io"
task-timeout: 1h00m
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anchors:
git-repo-resource-source: &git-repo-resource-source
uri: ((github-repo))
username: ((github-username))
password: ((github-ci-release-token))
branch: ((branch))
gradle-enterprise-task-params: &gradle-enterprise-task-params
GRADLE_ENTERPRISE_ACCESS_KEY: ((gradle_enterprise_secret_access_key))
GRADLE_ENTERPRISE_CACHE_USERNAME: ((gradle_enterprise_cache_user.username))
GRADLE_ENTERPRISE_CACHE_PASSWORD: ((gradle_enterprise_cache_user.password))
sonatype-task-params: &sonatype-task-params
SONATYPE_USERNAME: ((sonatype-username))
SONATYPE_PASSWORD: ((sonatype-password))
SONATYPE_URL: ((sonatype-url))
SONATYPE_STAGING_PROFILE: ((sonatype-staging-profile))
artifactory-task-params: &artifactory-task-params
ARTIFACTORY_SERVER: ((artifactory-server))
ARTIFACTORY_USERNAME: ((artifactory-username))
ARTIFACTORY_PASSWORD: ((artifactory-password))
build-project-task-params: &build-project-task-params
BRANCH: ((branch))
<<: *gradle-enterprise-task-params
docker-resource-source: &docker-resource-source
username: ((docker-hub-username))
password: ((docker-hub-password))
slack-fail-params: &slack-fail-params
text: >
:concourse-failed: <https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}|${BUILD_PIPELINE_NAME} ${BUILD_JOB_NAME} failed!>
[$TEXT_FILE_CONTENT]
text_file: git-repo/build/build-scan-uri.txt
silent: true
icon_emoji: ":concourse:"
username: concourse-ci
changelog-task-params: &changelog-task-params
name: generated-changelog/tag
tag: generated-changelog/tag
body: generated-changelog/changelog.md
github-task-params: &github-task-params
GITHUB_USERNAME: ((github-username))
GITHUB_TOKEN: ((github-ci-release-token))
resource_types:
- name: registry-image
type: registry-image
source:
<<: *docker-resource-source
repository: concourse/registry-image-resource
tag: 1.5.0
- name: artifactory-resource
type: registry-image
source:
<<: *docker-resource-source
repository: springio/artifactory-resource
tag: 0.0.18
- name: github-release
type: registry-image
source:
<<: *docker-resource-source
repository: concourse/github-release-resource
tag: 1.5.5
- name: github-status-resource
type: registry-image
source:
<<: *docker-resource-source
repository: dpb587/github-status-resource
tag: master
- name: pull-request
type: registry-image
source:
<<: *docker-resource-source
repository: teliaoss/github-pr-resource
tag: v0.23.0
- name: slack-notification
type: registry-image
source:
<<: *docker-resource-source
repository: cfcommunity/slack-notification-resource
tag: latest
resources:
- name: git-repo
type: git
icon: github
source:
<<: *git-repo-resource-source
- name: ci-images-git-repo
type: git
icon: github
source:
uri: ((github-repo))
branch: ((branch))
paths: ["ci/images/*"]
- name: ci-image
type: registry-image
icon: docker
source:
<<: *docker-resource-source
repository: ((docker-hub-organization))/spring-framework-ci
tag: ((milestone))
- name: every-morning
type: time
icon: alarm
source:
start: 8:00 AM
stop: 9:00 AM
location: Europe/Vienna
- name: artifactory-repo
type: artifactory-resource
icon: package-variant
source:
uri: ((artifactory-server))
username: ((artifactory-username))
password: ((artifactory-password))
build_name: ((build-name))
- name: git-pull-request
type: pull-request
icon: source-pull
source:
access_token: ((github-ci-pull-request-token))
repository: ((github-repo-name))
base_branch: ((branch))
ignore_paths: ["ci/*"]
- name: repo-status-build
type: github-status-resource
icon: eye-check-outline
source:
repository: ((github-repo-name))
access_token: ((github-ci-status-token))
branch: ((branch))
context: build
- name: repo-status-jdk19-build
type: github-status-resource
icon: eye-check-outline
source:
repository: ((github-repo-name))
access_token: ((github-ci-status-token))
branch: ((branch))
context: jdk19-build
- name: slack-alert
type: slack-notification
icon: slack
source:
url: ((slack-webhook-url))
- name: github-pre-release
type: github-release
icon: briefcase-download-outline
source:
owner: spring-projects
repository: spring-framework
access_token: ((github-ci-release-token))
pre_release: true
release: false
- name: github-release
type: github-release
icon: briefcase-download
source:
owner: spring-projects
repository: spring-framework
access_token: ((github-ci-release-token))
pre_release: false
jobs:
- name: build-ci-images
plan:
- get: git-repo
- get: ci-images-git-repo
trigger: true
- task: build-ci-image
privileged: true
file: git-repo/ci/tasks/build-ci-image.yml
output_mapping:
image: ci-image
vars:
ci-image-name: ci-image
<<: *docker-resource-source
- put: ci-image
params:
image: ci-image/image.tar
- name: build
serial: true
public: true
plan:
- get: ci-image
- get: git-repo
trigger: true
- put: repo-status-build
params: { state: "pending", commit: "git-repo" }
- do:
- task: build-project
image: ci-image
file: git-repo/ci/tasks/build-project.yml
privileged: true
timeout: ((task-timeout))
params:
<<: *build-project-task-params
on_failure:
do:
- put: repo-status-build
params: { state: "failure", commit: "git-repo" }
- put: slack-alert
params:
<<: *slack-fail-params
- put: repo-status-build
params: { state: "success", commit: "git-repo" }
- put: artifactory-repo
params: &artifactory-params
signing_key: ((signing-key))
signing_passphrase: ((signing-passphrase))
repo: libs-snapshot-local
folder: distribution-repository
build_uri: "https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}"
build_number: "${BUILD_PIPELINE_NAME}-${BUILD_JOB_NAME}-${BUILD_NAME}"
disable_checksum_uploads: true
threads: 8
artifact_set:
- include:
- "/**/framework-docs-*.zip"
properties:
"zip.name": "spring-framework"
"zip.displayname": "Spring Framework"
"zip.deployed": "false"
- include:
- "/**/framework-docs-*-docs.zip"
properties:
"zip.type": "docs"
- include:
- "/**/framework-docs-*-dist.zip"
properties:
"zip.type": "dist"
- include:
- "/**/framework-docs-*-schema.zip"
properties:
"zip.type": "schema"
get_params:
threads: 8
- name: jdk19-build
serial: true
public: true
plan:
- get: ci-image
- get: git-repo
- get: every-morning
trigger: true
- put: repo-status-jdk19-build
params: { state: "pending", commit: "git-repo" }
- do:
- task: check-project
image: ci-image
file: git-repo/ci/tasks/check-project.yml
privileged: true
timeout: ((task-timeout))
params:
TEST_TOOLCHAIN: 19
<<: *build-project-task-params
on_failure:
do:
- put: repo-status-jdk19-build
params: { state: "failure", commit: "git-repo" }
- put: slack-alert
params:
<<: *slack-fail-params
- put: repo-status-jdk19-build
params: { state: "success", commit: "git-repo" }
- name: build-pull-requests
serial: true
public: true
plan:
- get: ci-image
- get: git-repo
resource: git-pull-request
trigger: true
version: every
- do:
- put: git-pull-request
params:
path: git-repo
status: pending
- task: build-pr
image: ci-image
file: git-repo/ci/tasks/build-pr.yml
privileged: true
timeout: ((task-timeout))
params:
BRANCH: ((branch))
on_success:
put: git-pull-request
params:
path: git-repo
status: success
on_failure:
put: git-pull-request
params:
path: git-repo
status: failure
- name: stage-milestone
serial: true
plan:
- get: ci-image
- get: git-repo
trigger: false
- task: stage
image: ci-image
file: git-repo/ci/tasks/stage-version.yml
params:
RELEASE_TYPE: M
<<: *gradle-enterprise-task-params
- put: artifactory-repo
params:
<<: *artifactory-params
repo: libs-staging-local
- put: git-repo
params:
repository: stage-git-repo
- name: promote-milestone
serial: true
plan:
- get: ci-image
- get: git-repo
trigger: false
- get: artifactory-repo
trigger: false
passed: [stage-milestone]
params:
download_artifacts: false
save_build_info: true
- task: promote
file: git-repo/ci/tasks/promote-version.yml
params:
RELEASE_TYPE: M
<<: *artifactory-task-params
- task: generate-changelog
file: git-repo/ci/tasks/generate-changelog.yml
params:
RELEASE_TYPE: M
<<: *github-task-params
<<: *docker-resource-source
- put: github-pre-release
params:
<<: *changelog-task-params
- name: stage-rc
serial: true
plan:
- get: ci-image
- get: git-repo
trigger: false
- task: stage
image: ci-image
file: git-repo/ci/tasks/stage-version.yml
params:
RELEASE_TYPE: RC
<<: *gradle-enterprise-task-params
- put: artifactory-repo
params:
<<: *artifactory-params
repo: libs-staging-local
- put: git-repo
params:
repository: stage-git-repo
- name: promote-rc
serial: true
plan:
- get: ci-image
- get: git-repo
trigger: false
- get: artifactory-repo
trigger: false
passed: [stage-rc]
params:
download_artifacts: false
save_build_info: true
- task: promote
file: git-repo/ci/tasks/promote-version.yml
params:
RELEASE_TYPE: RC
<<: *docker-resource-source
<<: *artifactory-task-params
- task: generate-changelog
file: git-repo/ci/tasks/generate-changelog.yml
params:
RELEASE_TYPE: RC
<<: *github-task-params
- put: github-pre-release
params:
<<: *changelog-task-params
- name: stage-release
serial: true
plan:
- get: ci-image
- get: git-repo
trigger: false
- task: stage
image: ci-image
file: git-repo/ci/tasks/stage-version.yml
params:
RELEASE_TYPE: RELEASE
<<: *gradle-enterprise-task-params
- put: artifactory-repo
params:
<<: *artifactory-params
repo: libs-staging-local
- put: git-repo
params:
repository: stage-git-repo
- name: promote-release
serial: true
plan:
- get: ci-image
- get: git-repo
trigger: false
- get: artifactory-repo
trigger: false
passed: [stage-release]
params:
download_artifacts: true
save_build_info: true
- task: promote
file: git-repo/ci/tasks/promote-version.yml
params:
RELEASE_TYPE: RELEASE
<<: *docker-resource-source
<<: *artifactory-task-params
<<: *sonatype-task-params
- name: create-github-release
serial: true
plan:
- get: ci-image
- get: git-repo
- get: artifactory-repo
trigger: true
passed: [promote-release]
params:
download_artifacts: false
save_build_info: true
- task: generate-changelog
file: git-repo/ci/tasks/generate-changelog.yml
params:
RELEASE_TYPE: RELEASE
<<: *docker-resource-source
<<: *github-task-params
- put: github-release
params:
<<: *changelog-task-params
groups:
- name: "builds"
jobs: ["build", "jdk19-build"]
- name: "releases"
jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release"]
- name: "ci-images"
jobs: ["build-ci-images"]
- name: "pull-requests"
jobs: [ "build-pull-requests" ]
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#!/bin/bash
set -e
source $(dirname $0)/common.sh
pushd git-repo > /dev/null
./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 check
popd > /dev/null
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@@ -1,9 +0,0 @@
#!/bin/bash
set -e
source $(dirname $0)/common.sh
repository=$(pwd)/distribution-repository
pushd git-repo > /dev/null
./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 -PdeploymentRepository=${repository} build publishAllPublicationsToDeploymentRepository
popd > /dev/null
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@@ -1,9 +0,0 @@
#!/bin/bash
set -e
source $(dirname $0)/common.sh
pushd git-repo > /dev/null
./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false -Porg.gradle.java.installations.fromEnv=JDK17,JDK19 \
-PmainToolchain=${MAIN_TOOLCHAIN} -PtestToolchain=${TEST_TOOLCHAIN} --no-daemon --max-workers=4 check
popd > /dev/null
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source /opt/concourse-java.sh
setup_symlinks
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@@ -1,12 +0,0 @@
#!/bin/bash
set -e
CONFIG_DIR=git-repo/ci/config
version=$( cat artifactory-repo/build-info.json | jq -r '.buildInfo.modules[0].id' | sed 's/.*:.*:\(.*\)/\1/' )
java -jar /github-changelog-generator.jar \
--spring.config.location=${CONFIG_DIR}/changelog-generator.yml \
${version} generated-changelog/changelog.md
echo ${version} > generated-changelog/version
echo v${version} > generated-changelog/tag
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@@ -1,17 +0,0 @@
#!/bin/bash
CONFIG_DIR=git-repo/ci/config
version=$( cat artifactory-repo/build-info.json | jq -r '.buildInfo.modules[0].id' | sed 's/.*:.*:\(.*\)/\1/' )
export BUILD_INFO_LOCATION=$(pwd)/artifactory-repo/build-info.json
java -jar /concourse-release-scripts.jar \
--spring.config.location=${CONFIG_DIR}/release-scripts.yml \
publishToCentral $RELEASE_TYPE $BUILD_INFO_LOCATION artifactory-repo || { exit 1; }
java -jar /concourse-release-scripts.jar \
--spring.config.location=${CONFIG_DIR}/release-scripts.yml \
promote $RELEASE_TYPE $BUILD_INFO_LOCATION || { exit 1; }
echo "Promotion complete"
echo $version > version/version
-50
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@@ -1,50 +0,0 @@
#!/bin/bash
set -e
source $(dirname $0)/common.sh
repository=$(pwd)/distribution-repository
pushd git-repo > /dev/null
git fetch --tags --all > /dev/null
popd > /dev/null
git clone git-repo stage-git-repo > /dev/null
pushd stage-git-repo > /dev/null
snapshotVersion=$( awk -F '=' '$1 == "version" { print $2 }' gradle.properties )
if [[ $RELEASE_TYPE = "M" ]]; then
stageVersion=$( get_next_milestone_release $snapshotVersion)
nextVersion=$snapshotVersion
elif [[ $RELEASE_TYPE = "RC" ]]; then
stageVersion=$( get_next_rc_release $snapshotVersion)
nextVersion=$snapshotVersion
elif [[ $RELEASE_TYPE = "RELEASE" ]]; then
stageVersion=$( get_next_release $snapshotVersion)
nextVersion=$( bump_version_number $snapshotVersion)
else
echo "Unknown release type $RELEASE_TYPE" >&2; exit 1;
fi
echo "Staging $stageVersion (next version will be $nextVersion)"
sed -i "s/version=$snapshotVersion/version=$stageVersion/" gradle.properties
git config user.name "Spring Builds" > /dev/null
git config user.email "spring-builds@users.noreply.github.com" > /dev/null
git add gradle.properties > /dev/null
git commit -m"Release v$stageVersion" > /dev/null
git tag -a "v$stageVersion" -m"Release v$stageVersion" > /dev/null
./gradlew --no-daemon --max-workers=4 -PdeploymentRepository=${repository} build publishAllPublicationsToDeploymentRepository
git reset --hard HEAD^ > /dev/null
if [[ $nextVersion != $snapshotVersion ]]; then
echo "Setting next development version (v$nextVersion)"
sed -i "s/version=$snapshotVersion/version=$nextVersion/" gradle.properties
git add gradle.properties > /dev/null
git commit -m"Next development version (v$nextVersion)" > /dev/null
fi;
echo "Staging Complete"
popd > /dev/null
-30
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@@ -1,30 +0,0 @@
---
platform: linux
image_resource:
type: registry-image
source:
repository: concourse/oci-build-task
tag: 0.10.0
username: ((docker-hub-username))
password: ((docker-hub-password))
inputs:
- name: ci-images-git-repo
outputs:
- name: image
caches:
- path: ci-image-cache
params:
CONTEXT: ci-images-git-repo/ci/images
DOCKERFILE: ci-images-git-repo/ci/images/ci-image/Dockerfile
DOCKER_HUB_AUTH: ((docker-hub-auth))
run:
path: /bin/sh
args:
- "-c"
- |
mkdir -p /root/.docker
cat > /root/.docker/config.json <<EOF
{ "auths": { "https://index.docker.io/v1/": { "auth": "$DOCKER_HUB_AUTH" }}}
EOF
build
-19
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@@ -1,19 +0,0 @@
---
platform: linux
inputs:
- name: git-repo
caches:
- path: gradle
params:
BRANCH:
CI: true
GRADLE_ENTERPRISE_ACCESS_KEY:
GRADLE_ENTERPRISE_CACHE_USERNAME:
GRADLE_ENTERPRISE_CACHE_PASSWORD:
GRADLE_ENTERPRISE_URL: https://ge.spring.io
run:
path: bash
args:
- -ec
- |
${PWD}/git-repo/ci/scripts/build-pr.sh
-22
View File
@@ -1,22 +0,0 @@
---
platform: linux
inputs:
- name: git-repo
outputs:
- name: distribution-repository
- name: git-repo
caches:
- path: gradle
params:
BRANCH:
CI: true
GRADLE_ENTERPRISE_ACCESS_KEY:
GRADLE_ENTERPRISE_CACHE_USERNAME:
GRADLE_ENTERPRISE_CACHE_PASSWORD:
GRADLE_ENTERPRISE_URL: https://ge.spring.io
run:
path: bash
args:
- -ec
- |
${PWD}/git-repo/ci/scripts/build-project.sh
-24
View File
@@ -1,24 +0,0 @@
---
platform: linux
inputs:
- name: git-repo
outputs:
- name: distribution-repository
- name: git-repo
caches:
- path: gradle
params:
BRANCH:
CI: true
MAIN_TOOLCHAIN:
TEST_TOOLCHAIN:
GRADLE_ENTERPRISE_ACCESS_KEY:
GRADLE_ENTERPRISE_CACHE_USERNAME:
GRADLE_ENTERPRISE_CACHE_PASSWORD:
GRADLE_ENTERPRISE_URL: https://ge.spring.io
run:
path: bash
args:
- -ec
- |
${PWD}/git-repo/ci/scripts/check-project.sh
-22
View File
@@ -1,22 +0,0 @@
---
platform: linux
image_resource:
type: registry-image
source:
repository: springio/github-changelog-generator
tag: '0.0.8'
username: ((docker-hub-username))
password: ((docker-hub-password))
inputs:
- name: git-repo
- name: artifactory-repo
outputs:
- name: generated-changelog
params:
GITHUB_ORGANIZATION:
GITHUB_REPO:
GITHUB_USERNAME:
GITHUB_TOKEN:
RELEASE_TYPE:
run:
path: git-repo/ci/scripts/generate-changelog.sh
-25
View File
@@ -1,25 +0,0 @@
---
platform: linux
image_resource:
type: registry-image
source:
repository: springio/concourse-release-scripts
tag: '0.3.4'
username: ((docker-hub-username))
password: ((docker-hub-password))
inputs:
- name: git-repo
- name: artifactory-repo
outputs:
- name: version
params:
RELEASE_TYPE:
ARTIFACTORY_SERVER:
ARTIFACTORY_USERNAME:
ARTIFACTORY_PASSWORD:
SONATYPE_USER:
SONATYPE_PASSWORD:
SONATYPE_URL:
SONATYPE_STAGING_PROFILE:
run:
path: git-repo/ci/scripts/promote-version.sh
-17
View File
@@ -1,17 +0,0 @@
---
platform: linux
inputs:
- name: git-repo
outputs:
- name: stage-git-repo
- name: distribution-repository
params:
RELEASE_TYPE:
CI: true
GRADLE_ENTERPRISE_CACHE_USERNAME:
GRADLE_ENTERPRISE_CACHE_PASSWORD:
GRADLE_ENTERPRISE_URL: https://ge.spring.io
caches:
- path: gradle
run:
path: git-repo/ci/scripts/stage-version.sh
-23
View File
@@ -1,23 +0,0 @@
description = "Spring Framework (Bill of Materials)"
apply plugin: 'java-platform'
apply from: "$rootDir/gradle/publications.gradle"
group = "org.springframework"
dependencies {
constraints {
parent.moduleProjects.sort { "$it.name" }.each {
api it
}
}
}
publishing {
publications {
mavenJava(MavenPublication) {
artifactId = 'spring-framework-bom'
from components.javaPlatform
}
}
}
-254
View File
@@ -1,254 +0,0 @@
description = "Spring Framework Docs"
apply plugin: 'kotlin'
apply plugin: 'org.asciidoctor.jvm.convert'
apply plugin: 'org.asciidoctor.jvm.pdf'
apply from: "${rootDir}/gradle/publications.gradle"
configurations {
asciidoctorExtensions
}
dependencies {
api(project(":spring-context"))
api(project(":spring-web"))
api("jakarta.servlet:jakarta.servlet-api")
implementation(project(":spring-core-test"))
implementation("org.assertj:assertj-core")
}
jar {
enabled = false
}
javadoc {
enabled = false
}
dependencies {
asciidoctorExtensions "io.spring.asciidoctor.backends:spring-asciidoctor-backends:0.0.5"
}
/**
* Produce Javadoc for all Spring Framework modules in "build/docs/javadoc"
*/
task api(type: Javadoc) {
group = "Documentation"
description = "Generates aggregated Javadoc API documentation."
title = "${rootProject.description} ${version} API"
dependsOn {
moduleProjects.collect {
it.tasks.getByName("jar")
}
}
doFirst {
classpath = files(
// ensure the javadoc process can resolve types compiled from .aj sources
project(":spring-aspects").sourceSets.main.output
)
classpath += files(moduleProjects.collect { it.sourceSets.main.compileClasspath })
}
options {
encoding = "UTF-8"
memberLevel = JavadocMemberLevel.PROTECTED
author = true
header = rootProject.description
use = true
overview = "framework-docs/src/docs/api/overview.html"
splitIndex = true
links(project.ext.javadocLinks)
addBooleanOption('Xdoclint:syntax', true) // only check syntax with doclint
addBooleanOption('Werror', true) // fail build on Javadoc warnings
}
source moduleProjects.collect { project ->
project.sourceSets.main.allJava
}
maxMemory = "1024m"
destinationDir = file("$buildDir/docs/javadoc")
}
/**
* Produce KDoc for all Spring Framework modules in "build/docs/kdoc"
*/
rootProject.tasks.dokkaHtmlMultiModule.configure {
dependsOn {
tasks.getByName("api")
}
moduleName.set("spring-framework")
outputDirectory.set(project.file("$buildDir/docs/kdoc"))
}
asciidoctorj {
version = '2.4.3'
fatalWarnings ".*"
options doctype: 'book', eruby: 'erubis'
attributes([
icons: 'font',
idprefix: '',
idseparator: '-',
revnumber: project.version,
sectanchors: '',
sectnums: '',
'spring-version': project.version
])
}
/**
* Generate the Spring Framework Reference documentation from
* "src/docs/asciidoc" in "build/docs/ref-docs/html5".
*/
asciidoctor {
baseDirFollowsSourceDir()
configurations "asciidoctorExtensions"
sources {
include '*.adoc'
}
resources {
from(sourceDir) {
include 'images/*.png'
}
}
outputDir "$buildDir/docs/ref-docs/html5"
outputOptions {
backends "spring-html"
}
forkOptions {
jvmArgs += ["--add-opens", "java.base/sun.nio.ch=ALL-UNNAMED", "--add-opens", "java.base/java.io=ALL-UNNAMED"]
}
logDocuments = true
}
asciidoctor.mustRunAfter "check"
/**
* Generate the Spring Framework Reference documentation from "src/docs/asciidoc"
* in "build/docs/ref-docs/pdf".
*/
asciidoctorPdf {
baseDirFollowsSourceDir()
configurations 'asciidoctorExtensions'
sources {
include 'spring-framework.adocbook'
}
outputDir "$buildDir/docs/ref-docs/pdf"
forkOptions {
jvmArgs += ["--add-opens", "java.base/sun.nio.ch=ALL-UNNAMED", "--add-opens", "java.base/java.io=ALL-UNNAMED"]
}
logDocuments = true
}
/**
* Zip all docs (API and reference) into a single archive
*/
task docsZip(type: Zip, dependsOn: ['api', 'asciidoctor', 'asciidoctorPdf', rootProject.tasks.dokkaHtmlMultiModule]) {
group = "Distribution"
description = "Builds -${archiveClassifier} archive containing api and reference " +
"for deployment at https://docs.spring.io/spring-framework/docs/."
archiveBaseName.set("spring-framework")
archiveClassifier.set("docs")
from("src/dist") {
include "changelog.txt"
}
from (api) {
into "javadoc-api"
}
from ("$asciidoctor.outputDir") {
into "reference/html"
}
from ("$asciidoctorPdf.outputDir") {
into "reference/pdf"
}
from (rootProject.tasks.dokkaHtmlMultiModule.outputDirectory) {
into "kdoc-api"
}
}
/**
* Zip all Spring Framework schemas into a single archive
*/
task schemaZip(type: Zip) {
group = "Distribution"
archiveBaseName.set("spring-framework")
archiveClassifier.set("schema")
description = "Builds -${archiveClassifier} archive containing all " +
"XSDs for deployment at https://springframework.org/schema."
duplicatesStrategy DuplicatesStrategy.EXCLUDE
moduleProjects.each { module ->
def Properties schemas = new Properties();
module.sourceSets.main.resources.find {
(it.path.endsWith("META-INF/spring.schemas") || it.path.endsWith("META-INF\\spring.schemas"))
}?.withInputStream { schemas.load(it) }
for (def key : schemas.keySet()) {
def shortName = key.replaceAll(/http.*schema.(.*).spring-.*/, '$1')
assert shortName != key
File xsdFile = module.sourceSets.main.resources.find {
(it.path.endsWith(schemas.get(key)) || it.path.endsWith(schemas.get(key).replaceAll('\\/','\\\\')))
}
assert xsdFile != null
into (shortName) {
from xsdFile.path
}
}
}
}
/**
* Create a distribution zip with everything:
* docs, schemas, jars, source jars, javadoc jars
*/
task distZip(type: Zip, dependsOn: [docsZip, schemaZip]) {
group = "Distribution"
archiveBaseName.set("spring-framework")
archiveClassifier.set("dist")
description = "Builds -${archiveClassifier} archive, containing all jars and docs, " +
"suitable for community download page."
ext.baseDir = "spring-framework-${project.version}";
from("src/docs/dist") {
include "readme.txt"
include "license.txt"
include "notice.txt"
into "${baseDir}"
expand(copyright: new Date().format("yyyy"), version: project.version)
}
from(zipTree(docsZip.archiveFile)) {
into "${baseDir}/docs"
}
from(zipTree(schemaZip.archiveFile)) {
into "${baseDir}/schema"
}
moduleProjects.each { module ->
into ("${baseDir}/libs") {
from module.jar
if (module.tasks.findByPath("sourcesJar")) {
from module.sourcesJar
}
if (module.tasks.findByPath("javadocJar")) {
from module.javadocJar
}
}
}
}
distZip.mustRunAfter moduleProjects.check
publishing {
publications {
mavenJava(MavenPublication) {
artifact docsZip
artifact schemaZip
artifact distZip
}
}
}
@@ -1,7 +0,0 @@
<html>
<body>
<p>
This is the public API documentation for the <a href="https://github.com/spring-projects/spring-framework" target="_top">Spring Framework</a>.
</p>
</body>
</html>
@@ -1,80 +0,0 @@
[[appendix]]
= Appendix
include::attributes.adoc[]
include::page-layout.adoc[]
This part of the reference documentation covers topics that apply to multiple modules
within the core Spring Framework.
[[appendix-spring-properties]]
== Spring Properties
{api-spring-framework}/core/SpringProperties.html[`SpringProperties`] is a static holder
for properties that control certain low-level aspects of the Spring Framework. Users can
configure these properties via JVM system properties or programmatically via the
`SpringProperties.setProperty(String key, String value)` method. The latter may be
necessary if the deployment environment disallows custom JVM system properties. As an
alternative, these properties may be configured in a `spring.properties` file in the root
of the classpath -- for example, deployed within the application's JAR file.
The following table lists all currently supported Spring properties.
.Supported Spring Properties
|===
| Name | Description
| `spring.beaninfo.ignore`
| Instructs Spring to use the `Introspector.IGNORE_ALL_BEANINFO` mode when calling the
JavaBeans `Introspector`. See
{api-spring-framework}++/beans/CachedIntrospectionResults.html#IGNORE_BEANINFO_PROPERTY_NAME++[`CachedIntrospectionResults`]
for details.
| `spring.expression.compiler.mode`
| The mode to use when compiling expressions for the
<<core.adoc#expressions-compiler-configuration, Spring Expression Language>>.
| `spring.getenv.ignore`
| Instructs Spring to ignore operating system environment variables if a Spring
`Environment` property -- for example, a placeholder in a configuration String -- isn't
resolvable otherwise. See
{api-spring-framework}++/core/env/AbstractEnvironment.html#IGNORE_GETENV_PROPERTY_NAME++[`AbstractEnvironment`]
for details.
| `spring.index.ignore`
| Instructs Spring to ignore the components index located in
`META-INF/spring.components`. See <<core.adoc#beans-scanning-index, Generating an Index
of Candidate Components>>.
| `spring.jdbc.getParameterType.ignore`
| Instructs Spring to ignore `java.sql.ParameterMetaData.getParameterType` completely.
See the note in <<data-access.adoc#jdbc-batch-list, Batch Operations with a List of Objects>>.
| `spring.jndi.ignore`
| Instructs Spring to ignore a default JNDI environment, as an optimization for scenarios
where nothing is ever to be found for such JNDI fallback searches to begin with, avoiding
the repeated JNDI lookup overhead. See
{api-spring-framework}++/jndi/JndiLocatorDelegate.html#IGNORE_JNDI_PROPERTY_NAME++[`JndiLocatorDelegate`]
for details.
| `spring.objenesis.ignore`
| Instructs Spring to ignore Objenesis, not even attempting to use it. See
{api-spring-framework}++/objenesis/SpringObjenesis.html#IGNORE_OBJENESIS_PROPERTY_NAME++[`SpringObjenesis`]
for details.
| `spring.test.constructor.autowire.mode`
| The default _test constructor autowire mode_ to use if `@TestConstructor` is not present
on a test class. See <<testing.adoc#integration-testing-annotations-testconstructor,
Changing the default test constructor autowire mode>>.
| `spring.test.context.cache.maxSize`
| The maximum size of the context cache in the _Spring TestContext Framework_. See
<<testing.adoc#testcontext-ctx-management-caching, Context Caching>>.
| `spring.test.enclosing.configuration`
| The default _enclosing configuration inheritance mode_ to use if
`@NestedTestConfiguration` is not present on a test class. See
<<testing.adoc#integration-testing-annotations-nestedtestconfiguration, Changing the
default enclosing configuration inheritance mode>>.
|===
@@ -1,20 +0,0 @@
// Spring Portfolio
:docs-site: https://docs.spring.io
:docs-spring-boot: {docs-site}/spring-boot/docs/current/reference
:docs-spring-gemfire: {docs-site}/spring-gemfire/docs/current/reference
:docs-spring-security: {docs-site}/spring-security/reference
// spring-asciidoctor-backends Settings
:chomp: default headers packages
:fold: all
// Spring Framework
:docs-spring-framework: {docs-site}/spring-framework/docs/{spring-version}
:api-spring-framework: {docs-spring-framework}/javadoc-api/org/springframework
:docs-java: {docdir}/../../main/java/org/springframework/docs
:docs-kotlin: {docdir}/../../main/kotlin/org/springframework/docs
:docs-resources: {docdir}/../../main/resources
:spring-framework-main-code: https://github.com/spring-projects/spring-framework/tree/main
// Third-party Links
:docs-graalvm: https://www.graalvm.org/22.3/reference-manual
:gh-rsocket: https://github.com/rsocket
:gh-rsocket-extensions: {gh-rsocket}/rsocket/blob/master/Extensions
:gh-rsocket-java: {gh-rsocket}/rsocket-java
@@ -1,43 +0,0 @@
[[spring-core]]
= Core Technologies
include::attributes.adoc[]
include::page-layout.adoc[]
This part of the reference documentation covers all the technologies that are
absolutely integral to the Spring Framework.
Foremost amongst these is the Spring Framework's Inversion of Control (IoC) container.
A thorough treatment of the Spring Framework's IoC container is closely followed by
comprehensive coverage of Spring's Aspect-Oriented Programming (AOP) technologies.
The Spring Framework has its own AOP framework, which is conceptually easy to
understand and which successfully addresses the 80% sweet spot of AOP requirements
in Java enterprise programming.
Coverage of Spring's integration with AspectJ (currently the richest -- in terms of
features -- and certainly most mature AOP implementation in the Java enterprise space)
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.
include::core/core-beans.adoc[leveloffset=+1]
include::core/core-resources.adoc[leveloffset=+1]
include::core/core-validation.adoc[leveloffset=+1]
include::core/core-expressions.adoc[leveloffset=+1]
include::core/core-aop.adoc[leveloffset=+1]
include::core/core-aop-api.adoc[leveloffset=+1]
include::core/core-null-safety.adoc[leveloffset=+1]
include::core/core-databuffer-codec.adoc[leveloffset=+1]
include::core/core-spring-jcl.adoc[leveloffset=+1]
include::core/core-aot.adoc[leveloffset=+1]
include::core/core-appendix.adoc[leveloffset=+1]
File diff suppressed because it is too large Load Diff
File diff suppressed because it is too large Load Diff
@@ -1,309 +0,0 @@
[[core.aot]]
= Ahead of Time Optimizations
This chapter covers Spring's Ahead of Time (AOT) optimizations.
For AOT support specific to integration tests, see <<testing.adoc#testcontext-aot, Ahead of Time Support for Tests>>.
[[core.aot.introduction]]
== Introduction to Ahead of Time Optimizations
Spring's support for AOT optimizations is meant to inspect an `ApplicationContext` at build time and apply decisions and discovery logic that usually happens at runtime.
Doing so allows building an application startup arrangement that is more straightforward and focused on a fixed set of features based mainly on the classpath and the `Environment`.
Applying such optimizations early implies the following restrictions:
* The classpath is fixed and fully defined at build time.
* The beans defined in your application cannot change at runtime, meaning:
** `@Profile`, in particular profile-specific configuration needs to be chosen at build time.
** `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 (see related https://github.com/spring-projects/spring-framework/issues/29555[spring-framework#29555] issue).
* The return type of methods annotated with `@Bean` should be the most specific type possible (typically the concrete class, not an interface) in order to support proper type inference without invoking the corresponding `@Bean` method at build time.
When these restrictions are in place, it becomes possible to perform ahead-of-time processing at build time and generate additional assets.
A Spring AOT processed application typically generates:
* Java source code
* Bytecode (usually for dynamic proxies)
* {api-spring-framework}/aot/hint/RuntimeHints.html[`RuntimeHints`] for the use of reflection, resource loading, serialization, and JDK proxies.
NOTE: At the moment, AOT is focused on allowing Spring applications to be deployed as native images using GraalVM.
We intend to support more JVM-based use cases in future generations.
[[core.aot.basics]]
== AOT engine overview
The entry point of the AOT engine for processing an `ApplicationContext` arrangement is `ApplicationContextAotGenerator`. It takes care of the following steps, based on a `GenericApplicationContext` that represents the application to optimize and a {api-spring-framework}/aot/generate/GenerationContext.html[`GenerationContext`]:
* Refresh an `ApplicationContext` for AOT processing. Contrary to a traditional refresh, this version only creates bean definitions, not bean instances.
* Invoke the available `BeanFactoryInitializationAotProcessor` implementations and apply their contributions against the `GenerationContext`.
For instance, a core implementation iterates over all candidate bean definitions and generates the necessary code to restore the state of the `BeanFactory`.
Once this process completes, the `GenerationContext` will have been updated with the generated code, resources, and classes that are necessary for the application to run.
The `RuntimeHints` instance can also be used to generate the relevant GraalVM native image configuration files.
`ApplicationContextAotGenerator#processAheadOfTime` returns the class name of the `ApplicationContextInitializer` entry point that allows the context to be started with AOT optimizations.
Those steps are covered in greater detail in the sections below.
[[core.aot.refresh]]
== Refresh for AOT Processing
Refresh for AOT processing is supported on all `GenericApplicationContext` implementations.
An application context is created with any number of entry points, usually in the form of `@Configuration`-annotated classes.
Let's look at a basic example:
include::code:AotProcessingSample[tag=myapplication]
Starting this application with the regular runtime involves a number of steps including classpath scanning, configuration class parsing, bean instantiation, and lifecycle callback handling.
Refresh for AOT processing only applies a subset of what happens with a <<beans-introduction,regular `refresh`>>.
AOT processing can be triggered as follows:
include::code:AotProcessingSample[tag=aotcontext]
In this mode, <<beans-factory-extension-factory-postprocessors,`BeanFactoryPostProcessor` implementations>> are invoked as usual.
This includes configuration class parsing, import selectors, classpath scanning, etc.
Such steps make sure that the `BeanRegistry` contains the relevant bean definitions for the application.
If bean definitions are guarded by conditions (such as `@Profile`), these are discarded at this stage.
Because this mode does not actually create bean instances, `BeanPostProcessor` implementations are not invoked, except for specific variants that are relevant for AOT processing.
These are:
* `MergedBeanDefinitionPostProcessor` implementations post-process bean definitions to extract additional settings, such as `init` and `destroy` methods.
* `SmartInstantiationAwareBeanPostProcessor` implementations determine a more precise bean type if necessary.
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.
[[core.aot.bean-factory-initialization-contributions]]
== Bean Factory Initialization AOT Contributions
Components that want to participate in this step can implement the {api-spring-framework}/beans/factory/aot/BeanFactoryInitializationAotProcessor.html[`BeanFactoryInitializationAotProcessor`] interface.
Each implementation can return an AOT contribution, based on the state of the bean factory.
An AOT contribution is a component that contributes generated code that reproduces a particular behavior.
It can also contribute `RuntimeHints` to indicate the need for reflection, resource loading, serialization, or JDK proxies.
A `BeanFactoryInitializationAotProcessor` implementation can be registered in `META-INF/spring/aot.factories` with a key equal to the fully qualified name of the interface.
A `BeanFactoryInitializationAotProcessor` can also be implemented directly by a bean.
In this mode, the bean provides an AOT contribution equivalent to the feature it provides with a regular runtime.
Consequently, such a bean is automatically excluded from the AOT-optimized context.
[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 `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.
====
[[core.aot.bean-registration-contributions]]
=== Bean Registration AOT Contributions
A core `BeanFactoryInitializationAotProcessor` implementation is responsible for collecting the necessary contributions for each candidate `BeanDefinition`.
It does so using a dedicated `BeanRegistrationAotProcessor`.
This interface is used as follows:
* Implemented by a `BeanPostProcessor` bean, to replace its runtime behavior.
For instance <<beans-factory-extension-bpp-examples-aabpp,`AutowiredAnnotationBeanPostProcessor`>> implements this interface to generate code that injects members annotated with `@Autowired`.
* Implemented by a type registered in `META-INF/spring/aot.factories` with a key equal to the fully qualified name of the interface.
Typically used when the bean definition needs to be tuned for specific features of the core framework.
[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 `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.
====
If no `BeanRegistrationAotProcessor` handles a particular registered bean, a default implementation processes it.
This is the default behavior, since tuning the generated code for a bean definition should be restricted to corner cases.
Taking our previous example, let's assume that `DataSourceConfiguration` is as follows:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
@Configuration(proxyBeanMethods = false)
public class DataSourceConfiguration {
@Bean
public SimpleDataSource dataSource() {
return new SimpleDataSource();
}
}
----
Since there isn't any particular condition on this class, `dataSourceConfiguration` and `dataSource` are identified as candidates.
The AOT engine will convert the configuration class above to code similar to the following:
[source,java,indent=0,role="primary"]
.Java
----
/**
* Bean definitions for {@link DataSourceConfiguration}
*/
public class DataSourceConfiguration__BeanDefinitions {
/**
* Get the bean definition for 'dataSourceConfiguration'
*/
public static BeanDefinition getDataSourceConfigurationBeanDefinition() {
Class<?> beanType = DataSourceConfiguration.class;
RootBeanDefinition beanDefinition = new RootBeanDefinition(beanType);
beanDefinition.setInstanceSupplier(DataSourceConfiguration::new);
return beanDefinition;
}
/**
* Get the bean instance supplier for 'dataSource'.
*/
private static BeanInstanceSupplier<SimpleDataSource> getDataSourceInstanceSupplier() {
return BeanInstanceSupplier.<SimpleDataSource>forFactoryMethod(DataSourceConfiguration.class, "dataSource")
.withGenerator((registeredBean) -> registeredBean.getBeanFactory().getBean(DataSourceConfiguration.class).dataSource());
}
/**
* Get the bean definition for 'dataSource'
*/
public static BeanDefinition getDataSourceBeanDefinition() {
Class<?> beanType = SimpleDataSource.class;
RootBeanDefinition beanDefinition = new RootBeanDefinition(beanType);
beanDefinition.setInstanceSupplier(getDataSourceInstanceSupplier());
return beanDefinition;
}
}
----
NOTE: The exact code generated may differ depending on the exact nature of your bean definitions.
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.
[[core.aot.hints]]
== Runtime Hints
Running an application as a native image requires additional information compared to a regular JVM runtime.
For instance, GraalVM needs to know ahead of time if a component uses reflection.
Similarly, classpath resources are not shipped in a native image unless specified explicitly.
Consequently, if the application needs to load a resource, it must be referenced from the corresponding GraalVM native image configuration file.
The {api-spring-framework}/aot/hint/RuntimeHints.html[`RuntimeHints`] API collects the need for reflection, resource loading, serialization, and JDK proxies at runtime.
The following example makes sure that `config/app.properties` can be loaded from the classpath at runtime within a native image:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
runtimeHints.resources().registerPattern("config/app.properties");
----
A number of contracts are handled automatically during AOT processing.
For instance, the return type of a `@Controller` method is inspected, and relevant reflection hints are added if Spring detects that the type should be serialized (typically to JSON).
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.
[[core.aot.hints.import-runtime-hints]]
=== `@ImportRuntimeHints`
`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 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.
[[core.aot.hints.reflective]]
=== `@Reflective`
{api-spring-framework}/aot/hint/annotation/Reflective.html[`@Reflective`] provides an idiomatic way to flag the need for reflection on an annotated element.
For instance, `@EventListener` is meta-annotated with `@Reflective` since the underlying implementation invokes the annotated method using reflection.
By default, only Spring beans are considered and an invocation hint is registered for the annotated element.
This can be tuned by specifying a custom `ReflectiveProcessor` implementation via the
`@Reflective` annotation.
Library authors can reuse this annotation for their own purposes.
If components other than Spring beans need to be processed, a `BeanFactoryInitializationAotProcessor` can detect the relevant types and use `ReflectiveRuntimeHintsRegistrar` to process them.
[[core.aot.hints.register-reflection-for-binding]]
=== `@RegisterReflectionForBinding`
{api-spring-framework}/aot/hint/annotation/RegisterReflectionForBinding.html[`@RegisterReflectionForBinding`] is a specialization of `@Reflective` that registers the need for serializing arbitrary types.
A typical use case is the use of DTOs that the container cannot infer, such as using a web client within a method body.
`@RegisterReflectionForBinding` can be applied to any Spring bean at the class level, but it can also be applied directly to a method, field, or constructor to better indicate where the hints are actually required.
The following example registers `Account` for serialization.
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
@Component
public class OrderService {
@RegisterReflectionForBinding(Account.class)
public void process(Order order) {
// ...
}
}
----
[[core.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` 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]
With `RuntimeHintsPredicates`, we can check for reflection, resource, serialization, or proxy generation hints.
This approach works well for unit tests but implies that the runtime behavior of a component is well known.
You can learn more about the global runtime behavior of an application by running its test suite (or the app itself) with the {docs-graalvm}/native-image/metadata/AutomaticMetadataCollection/[GraalVM tracing agent].
This agent will record all relevant calls requiring GraalVM hints at runtime and write them out as JSON configuration files.
For more targeted discovery and testing, Spring Framework ships a dedicated module with core AOT testing utilities, `"org.springframework:spring-core-test"`.
This module contains the RuntimeHints Agent, a Java agent that records all method invocations that are related to runtime hints and helps you to assert that a given `RuntimeHints` instance covers all recorded invocations.
Let's consider a piece of infrastructure for which we'd like to test the hints we're contributing during the AOT processing phase.
include::code:SampleReflection[]
We can then write a unit test (no native compilation required) that checks our contributed hints:
include::code:SampleReflectionRuntimeHintsTests[]
If you forgot to contribute a hint, the test will fail and provide some details about the invocation:
[source,txt,indent=0,subs="verbatim,quotes"]
----
org.springframework.docs.core.aot.hints.testing.SampleReflection performReflection
INFO: Spring version:6.0.0-SNAPSHOT
Missing <"ReflectionHints"> for invocation <java.lang.Class#forName>
with arguments ["org.springframework.core.SpringVersion",
false,
jdk.internal.loader.ClassLoaders$AppClassLoader@251a69d7].
Stacktrace:
<"org.springframework.util.ClassUtils#forName, Line 284
io.spring.runtimehintstesting.SampleReflection#performReflection, Line 19
io.spring.runtimehintstesting.SampleReflectionRuntimeHintsTests#lambda$shouldRegisterReflectionHints$0, Line 25
----
There are various ways to configure this Java agent in your build, so please refer to the documentation of your build tool and test execution plugin.
The agent itself can be configured to instrument specific packages (by default, only `org.springframework` is instrumented).
You'll find more details in the {spring-framework-main-code}/buildSrc/README.md[Spring Framework `buildSrc` README] file.
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@@ -1,181 +0,0 @@
[[databuffers]]
= Data Buffers and Codecs
Java NIO provides `ByteBuffer` but many libraries build their own byte buffer API on top,
especially for network operations where reusing buffers and/or using direct buffers is
beneficial for performance. For example Netty has the `ByteBuf` hierarchy, Undertow uses
XNIO, Jetty uses pooled byte buffers with a callback to be released, and so on.
The `spring-core` module provides a set of abstractions to work with various byte buffer
APIs as follows:
* <<databuffers-factory>> abstracts the creation of a data buffer.
* <<databuffers-buffer>> represents a byte buffer, which may be
<<databuffers-buffer-pooled, pooled>>.
* <<databuffers-utils>> offers utility methods for data buffers.
* <<Codecs>> decode or encode data buffer streams into higher level objects.
[[databuffers-factory]]
== `DataBufferFactory`
`DataBufferFactory` is used to create data buffers in one of two ways:
. Allocate a new data buffer, optionally specifying capacity upfront, if known, which is
more efficient even though implementations of `DataBuffer` can grow and shrink on demand.
. Wrap an existing `byte[]` or `java.nio.ByteBuffer`, which decorates the given data with
a `DataBuffer` implementation and that does not involve allocation.
Note that WebFlux applications do not create a `DataBufferFactory` directly but instead
access it through the `ServerHttpResponse` or the `ClientHttpRequest` on the client side.
The type of factory depends on the underlying client or server, e.g.
`NettyDataBufferFactory` for Reactor Netty, `DefaultDataBufferFactory` for others.
[[databuffers-buffer]]
== `DataBuffer`
The `DataBuffer` interface offers similar operations as `java.nio.ByteBuffer` but also
brings a few additional benefits some of which are inspired by the Netty `ByteBuf`.
Below is a partial list of benefits:
* Read and write with independent positions, i.e. not requiring a call to `flip()` to
alternate between read and write.
* Capacity expanded on demand as with `java.lang.StringBuilder`.
* Pooled buffers and reference counting via <<databuffers-buffer-pooled>>.
* View a buffer as `java.nio.ByteBuffer`, `InputStream`, or `OutputStream`.
* Determine the index, or the last index, for a given byte.
[[databuffers-buffer-pooled]]
== `PooledDataBuffer`
As explained in the Javadoc for
https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html[ByteBuffer],
byte buffers can be direct or non-direct. Direct buffers may reside outside the Java heap
which eliminates the need for copying for native I/O operations. That makes direct buffers
particularly useful for receiving and sending data over a socket, but they're also more
expensive to create and release, which leads to the idea of pooling buffers.
`PooledDataBuffer` is an extension of `DataBuffer` that helps with reference counting which
is essential for byte buffer pooling. How does it work? When a `PooledDataBuffer` is
allocated the reference count is at 1. Calls to `retain()` increment the count, while
calls to `release()` decrement it. As long as the count is above 0, the buffer is
guaranteed not to be released. When the count is decreased to 0, the pooled buffer can be
released, which in practice could mean the reserved memory for the buffer is returned to
the memory pool.
Note that instead of operating on `PooledDataBuffer` directly, in most cases it's better
to use the convenience methods in `DataBufferUtils` that apply release or retain to a
`DataBuffer` only if it is an instance of `PooledDataBuffer`.
[[databuffers-utils]]
== `DataBufferUtils`
`DataBufferUtils` offers a number of utility methods to operate on data buffers:
* Join a stream of data buffers into a single buffer possibly with zero copy, e.g. via
composite buffers, if that's supported by the underlying byte buffer API.
* Turn `InputStream` or NIO `Channel` into `Flux<DataBuffer>`, and vice versa a
`Publisher<DataBuffer>` into `OutputStream` or NIO `Channel`.
* Methods to release or retain a `DataBuffer` if the buffer is an instance of
`PooledDataBuffer`.
* Skip or take from a stream of bytes until a specific byte count.
[[codecs]]
== Codecs
The `org.springframework.core.codec` package provides the following strategy interfaces:
* `Encoder` to encode `Publisher<T>` into a stream of data buffers.
* `Decoder` to decode `Publisher<DataBuffer>` into a stream of higher level objects.
The `spring-core` module provides `byte[]`, `ByteBuffer`, `DataBuffer`, `Resource`, and
`String` encoder and decoder implementations. The `spring-web` module adds Jackson JSON,
Jackson Smile, JAXB2, Protocol Buffers and other encoders and decoders. See
<<web-reactive.adoc#webflux-codecs, Codecs>> in the WebFlux section.
[[databuffers-using]]
== Using `DataBuffer`
When working with data buffers, special care must be taken to ensure buffers are released
since they may be <<databuffers-buffer-pooled, pooled>>. We'll use codecs to illustrate
how that works but the concepts apply more generally. Let's see what codecs must do
internally to manage data buffers.
A `Decoder` is the last to read input data buffers, before creating higher level
objects, and therefore it must release them as follows:
. If a `Decoder` simply reads each input buffer and is ready to
release it immediately, it can do so via `DataBufferUtils.release(dataBuffer)`.
. If a `Decoder` is using `Flux` or `Mono` operators such as `flatMap`, `reduce`, and
others that prefetch and cache data items internally, or is using operators such as
`filter`, `skip`, and others that leave out items, then
`doOnDiscard(DataBuffer.class, DataBufferUtils::release)` must be added to the
composition chain to ensure such buffers are released prior to being discarded, possibly
also as a result of an error or cancellation signal.
. If a `Decoder` holds on to one or more data buffers in any other way, it must
ensure they are released when fully read, or in case of an error or cancellation signals that
take place before the cached data buffers have been read and released.
Note that `DataBufferUtils#join` offers a safe and efficient way to aggregate a data
buffer stream into a single data buffer. Likewise `skipUntilByteCount` and
`takeUntilByteCount` are additional safe methods for decoders to use.
An `Encoder` allocates data buffers that others must read (and release). So an `Encoder`
doesn't have much to do. However an `Encoder` must take care to release a data buffer if
a serialization error occurs while populating the buffer with data. For example:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
DataBuffer buffer = factory.allocateBuffer();
boolean release = true;
try {
// serialize and populate buffer..
release = false;
}
finally {
if (release) {
DataBufferUtils.release(buffer);
}
}
return buffer;
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val buffer = factory.allocateBuffer()
var release = true
try {
// serialize and populate buffer..
release = false
} finally {
if (release) {
DataBufferUtils.release(buffer)
}
}
return buffer
----
The consumer of an `Encoder` is responsible for releasing the data buffers it receives.
In a WebFlux application, the output of the `Encoder` is used to write to the HTTP server
response, or to the client HTTP request, in which case releasing the data buffers is the
responsibility of the code writing to the server response, or to the client request.
Note that when running on Netty, there are debugging options for
https://github.com/netty/netty/wiki/Reference-counted-objects#troubleshooting-buffer-leaks[troubleshooting buffer leaks].
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@@ -1,56 +0,0 @@
[[null-safety]]
= Null-safety
Although Java does not let you express null-safety with its type system, the Spring Framework
now provides the following annotations in the `org.springframework.lang` package to let you
declare nullability of APIs and fields:
* {api-spring-framework}/lang/Nullable.html[`@Nullable`]: Annotation to indicate that a
specific parameter, return value, or field can be `null`.
* {api-spring-framework}/lang/NonNull.html[`@NonNull`]: Annotation to indicate that a specific
parameter, return value, or field cannot be `null` (not needed on parameters / return values
and fields where `@NonNullApi` and `@NonNullFields` apply, respectively).
* {api-spring-framework}/lang/NonNullApi.html[`@NonNullApi`]: Annotation at the package level
that declares non-null as the default semantics for parameters and return values.
* {api-spring-framework}/lang/NonNullFields.html[`@NonNullFields`]: Annotation at the package
level that declares non-null as the default semantics for fields.
The Spring Framework itself leverages these annotations, but they can also be used in any
Spring-based Java project to declare null-safe APIs and optionally null-safe fields.
Generic type arguments, varargs and array elements nullability are not supported yet but
should be in an upcoming release, see https://jira.spring.io/browse/SPR-15942[SPR-15942]
for up-to-date information. Nullability declarations are expected to be fine-tuned between
Spring Framework releases, including minor ones. Nullability of types used inside method
bodies is outside of the scope of this feature.
NOTE: Other common libraries such as Reactor and Spring Data provide null-safe APIs that
use a similar nullability arrangement, delivering a consistent overall experience for
Spring application developers.
== Use cases
In addition to providing an explicit declaration for Spring Framework API nullability,
these annotations can be used by an IDE (such as IDEA or Eclipse) to provide useful
warnings related to null-safety in order to avoid `NullPointerException` at runtime.
They are also used to make Spring API null-safe in Kotlin projects, since Kotlin natively
supports https://kotlinlang.org/docs/reference/null-safety.html[null-safety]. More details
are available in the <<languages#kotlin-null-safety, Kotlin support documentation>>.
== JSR-305 meta-annotations
Spring annotations are meta-annotated with https://jcp.org/en/jsr/detail?id=305[JSR 305]
annotations (a dormant but wide-spread JSR). JSR-305 meta-annotations let tooling vendors
like IDEA or Kotlin provide null-safety support in a generic way, without having to
hard-code support for Spring annotations.
It is not necessary nor recommended to add a JSR-305 dependency to the project classpath to
take advantage of Spring null-safe API. Only projects such as Spring-based libraries that use
null-safety annotations in their codebase should add `com.google.code.findbugs:jsr305:3.0.2`
with `compileOnly` Gradle configuration or Maven `provided` scope to avoid compile warnings.
@@ -1,965 +0,0 @@
[[resources]]
= Resources
This chapter covers how Spring handles resources and how you can work with resources in
Spring. It includes the following topics:
* <<resources-introduction>>
* <<resources-resource>>
* <<resources-implementations>>
* <<resources-resourceloader>>
* <<resources-resourcepatternresolver>>
* <<resources-resourceloaderaware>>
* <<resources-as-dependencies>>
* <<resources-app-ctx>>
[[resources-introduction]]
== Introduction
Java's standard `java.net.URL` class and standard handlers for various URL prefixes,
unfortunately, are not quite adequate enough for all access to low-level resources. For
example, there is no standardized `URL` implementation that may be used to access a
resource that needs to be obtained from the classpath or relative to a
`ServletContext`. While it is possible to register new handlers for specialized `URL`
prefixes (similar to existing handlers for prefixes such as `http:`), this is generally
quite complicated, and the `URL` interface still lacks some desirable functionality,
such as a method to check for the existence of the resource being pointed to.
[[resources-resource]]
== The `Resource` Interface
Spring's `Resource` interface located in the `org.springframework.core.io.` package is
meant to be a more capable interface for abstracting access to low-level resources. The
following listing provides an overview of the `Resource` interface. See the
{api-spring-framework}/core/io/Resource.html[`Resource`] javadoc for further details.
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface Resource extends InputStreamSource {
boolean exists();
boolean isReadable();
boolean isOpen();
boolean isFile();
URL getURL() throws IOException;
URI getURI() throws IOException;
File getFile() throws IOException;
ReadableByteChannel readableChannel() throws IOException;
long contentLength() throws IOException;
long lastModified() throws IOException;
Resource createRelative(String relativePath) throws IOException;
String getFilename();
String getDescription();
}
----
As the definition of the `Resource` interface shows, it extends the `InputStreamSource`
interface. The following listing shows the definition of the `InputStreamSource`
interface:
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface InputStreamSource {
InputStream getInputStream() throws IOException;
}
----
Some of the most important methods from the `Resource` interface are:
* `getInputStream()`: Locates and opens the resource, returning an `InputStream` for
reading from the resource. It is expected that each invocation returns a fresh
`InputStream`. It is the responsibility of the caller to close the stream.
* `exists()`: Returns a `boolean` indicating whether this resource actually exists in
physical form.
* `isOpen()`: Returns a `boolean` indicating whether this resource represents a handle
with an open stream. If `true`, the `InputStream` cannot be read multiple times and
must be read once only and then closed to avoid resource leaks. Returns `false` for
all usual resource implementations, with the exception of `InputStreamResource`.
* `getDescription()`: Returns a description for this resource, to be used for error
output when working with the resource. This is often the fully qualified file name or
the actual URL of the resource.
Other methods let you obtain an actual `URL` or `File` object representing the
resource (if the underlying implementation is compatible and supports that
functionality).
Some implementations of the `Resource` interface also implement the extended
{api-spring-framework}/core/io/WritableResource.html[`WritableResource`] interface
for a resource that supports writing to it.
Spring itself uses the `Resource` abstraction extensively, as an argument type in
many method signatures when a resource is needed. Other methods in some Spring APIs
(such as the constructors to various `ApplicationContext` implementations) take a
`String` which in unadorned or simple form is used to create a `Resource` appropriate to
that context implementation or, via special prefixes on the `String` path, let the
caller specify that a specific `Resource` implementation must be created and used.
While the `Resource` interface is used a lot with Spring and by Spring, it is actually
very convenient to use as a general utility class by itself in your own code, for access
to resources, even when your code does not know or care about any other parts of Spring.
While this couples your code to Spring, it really only couples it to this small set of
utility classes, which serves as a more capable replacement for `URL` and can be
considered equivalent to any other library you would use for this purpose.
NOTE: The `Resource` abstraction does not replace functionality. It wraps it where
possible. For example, a `UrlResource` wraps a URL and uses the wrapped `URL` to do its
work.
[[resources-implementations]]
== Built-in `Resource` Implementations
Spring includes several built-in `Resource` implementations:
* <<resources-implementations-urlresource>>
* <<resources-implementations-classpathresource>>
* <<resources-implementations-filesystemresource>>
* <<resources-implementations-pathresource>>
* <<resources-implementations-servletcontextresource>>
* <<resources-implementations-inputstreamresource>>
* <<resources-implementations-bytearrayresource>>
For a complete list of `Resource` implementations available in Spring, consult the
"All Known Implementing Classes" section of the
{api-spring-framework}/core/io/Resource.html[`Resource`] javadoc.
[[resources-implementations-urlresource]]
=== `UrlResource`
`UrlResource` wraps a `java.net.URL` and can be used to access any object that is
normally accessible with a URL, such as files, an HTTPS target, an FTP target, and
others. All URLs have a standardized `String` representation, such that appropriate
standardized prefixes are used to indicate one URL type from another. This includes
`file:` for accessing filesystem paths, `https:` for accessing resources through the
HTTPS protocol, `ftp:` for accessing resources through FTP, and others.
A `UrlResource` is created by Java code by explicitly using the `UrlResource` constructor
but is often created implicitly when you call an API method that takes a `String`
argument meant to represent a path. For the latter case, a JavaBeans `PropertyEditor`
ultimately decides which type of `Resource` to create. If the path string contains a
well-known (to property editor, that is) prefix (such as `classpath:`), it creates an
appropriate specialized `Resource` for that prefix. However, if it does not recognize the
prefix, it assumes the string is a standard URL string and creates a `UrlResource`.
[[resources-implementations-classpathresource]]
=== `ClassPathResource`
This class represents a resource that should be obtained from the classpath. It uses
either the thread context class loader, a given class loader, or a given class for
loading resources.
This `Resource` implementation supports resolution as a `java.io.File` if the class path
resource resides in the file system but not for classpath resources that reside in a
jar and have not been expanded (by the servlet engine or whatever the environment is)
to the filesystem. To address this, the various `Resource` implementations always support
resolution as a `java.net.URL`.
A `ClassPathResource` is created by Java code by explicitly using the `ClassPathResource`
constructor but is often created implicitly when you call an API method that takes a
`String` argument meant to represent a path. For the latter case, a JavaBeans
`PropertyEditor` recognizes the special prefix, `classpath:`, on the string path and
creates a `ClassPathResource` in that case.
[[resources-implementations-filesystemresource]]
=== `FileSystemResource`
This is a `Resource` implementation for `java.io.File` handles. It also supports
`java.nio.file.Path` handles, applying Spring's standard String-based path
transformations but performing all operations via the `java.nio.file.Files` API. For pure
`java.nio.path.Path` based support use a `PathResource` instead. `FileSystemResource`
supports resolution as a `File` and as a `URL`.
[[resources-implementations-pathresource]]
=== `PathResource`
This is a `Resource` implementation for `java.nio.file.Path` handles, performing all
operations and transformations via the `Path` API. It supports resolution as a `File` and
as a `URL` and also implements the extended `WritableResource` interface. `PathResource`
is effectively a pure `java.nio.path.Path` based alternative to `FileSystemResource` with
different `createRelative` behavior.
[[resources-implementations-servletcontextresource]]
=== `ServletContextResource`
This is a `Resource` implementation for `ServletContext` resources that interprets
relative paths within the relevant web application's root directory.
It always supports stream access and URL access but allows `java.io.File` access only
when the web application archive is expanded and the resource is physically on the
filesystem. Whether or not it is expanded and on the filesystem or accessed
directly from the JAR or somewhere else like a database (which is conceivable) is actually
dependent on the Servlet container.
[[resources-implementations-inputstreamresource]]
=== `InputStreamResource`
An `InputStreamResource` is a `Resource` implementation for a given `InputStream`. It
should be used only if no specific `Resource` implementation is applicable. In
particular, prefer `ByteArrayResource` or any of the file-based `Resource`
implementations where possible.
In contrast to other `Resource` implementations, this is a descriptor for an
already-opened resource. Therefore, it returns `true` from `isOpen()`. Do not use it if
you need to keep the resource descriptor somewhere or if you need to read a stream
multiple times.
[[resources-implementations-bytearrayresource]]
=== `ByteArrayResource`
This is a `Resource` implementation for a given byte array. It creates a
`ByteArrayInputStream` for the given byte array.
It is useful for loading content from any given byte array without having to resort to a
single-use `InputStreamResource`.
[[resources-resourceloader]]
== The `ResourceLoader` Interface
The `ResourceLoader` interface is meant to be implemented by objects that can return
(that is, load) `Resource` instances. The following listing shows the `ResourceLoader`
interface definition:
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface ResourceLoader {
Resource getResource(String location);
ClassLoader getClassLoader();
}
----
All application contexts implement the `ResourceLoader` interface. Therefore, all
application contexts may be used to obtain `Resource` instances.
When you call `getResource()` on a specific application context, and the location path
specified doesn't have a specific prefix, you get back a `Resource` type that is
appropriate to that particular application context. For example, assume the following
snippet of code was run against a `ClassPathXmlApplicationContext` instance:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
Resource template = ctx.getResource("some/resource/path/myTemplate.txt");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val template = ctx.getResource("some/resource/path/myTemplate.txt")
----
Against a `ClassPathXmlApplicationContext`, that code returns a `ClassPathResource`. If
the same method were run against a `FileSystemXmlApplicationContext` instance, it would
return a `FileSystemResource`. For a `WebApplicationContext`, it would return a
`ServletContextResource`. It would similarly return appropriate objects for each context.
As a result, you can load resources in a fashion appropriate to the particular application
context.
On the other hand, you may also force `ClassPathResource` to be used, regardless of the
application context type, by specifying the special `classpath:` prefix, as the following
example shows:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
Resource template = ctx.getResource("classpath:some/resource/path/myTemplate.txt");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val template = ctx.getResource("classpath:some/resource/path/myTemplate.txt")
----
Similarly, you can force a `UrlResource` to be used by specifying any of the standard
`java.net.URL` prefixes. The following examples use the `file` and `https` prefixes:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
Resource template = ctx.getResource("file:///some/resource/path/myTemplate.txt");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val template = ctx.getResource("file:///some/resource/path/myTemplate.txt")
----
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
Resource template = ctx.getResource("https://myhost.com/resource/path/myTemplate.txt");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val template = ctx.getResource("https://myhost.com/resource/path/myTemplate.txt")
----
The following table summarizes the strategy for converting `String` objects to `Resource`
objects:
[[resources-resource-strings]]
.Resource strings
|===
| Prefix| Example| Explanation
| classpath:
| `classpath:com/myapp/config.xml`
| Loaded from the classpath.
| file:
| `\file:///data/config.xml`
| Loaded as a `URL` from the filesystem. See also <<resources-filesystemresource-caveats>>.
| https:
| `\https://myserver/logo.png`
| Loaded as a `URL`.
| (none)
| `/data/config.xml`
| Depends on the underlying `ApplicationContext`.
|===
[[resources-resourcepatternresolver]]
== The `ResourcePatternResolver` Interface
The `ResourcePatternResolver` interface is an extension to the `ResourceLoader` interface
which defines a strategy for resolving a location pattern (for example, an Ant-style path
pattern) into `Resource` objects.
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface ResourcePatternResolver extends ResourceLoader {
String CLASSPATH_ALL_URL_PREFIX = "classpath*:";
Resource[] getResources(String locationPattern) throws IOException;
}
----
As can be seen above, this interface also defines a special `classpath*:` resource prefix
for all matching resources from the class path. Note that the resource location is
expected to be a path without placeholders in this case -- for example,
`classpath*:/config/beans.xml`. JAR files or different directories in the class path can
contain multiple files with the same path and the same name. See
<<resources-app-ctx-wildcards-in-resource-paths>> and its subsections for further details
on wildcard support with the `classpath*:` resource prefix.
A passed-in `ResourceLoader` (for example, one supplied via
<<resources-resourceloaderaware,`ResourceLoaderAware`>> semantics) can be checked whether
it implements this extended interface too.
`PathMatchingResourcePatternResolver` is a standalone implementation that is usable
outside an `ApplicationContext` and is also used by `ResourceArrayPropertyEditor` for
populating `Resource[]` bean properties. `PathMatchingResourcePatternResolver` is able to
resolve a specified resource location path into one or more matching `Resource` objects.
The source path may be a simple path which has a one-to-one mapping to a target
`Resource`, or alternatively may contain the special `classpath*:` prefix and/or internal
Ant-style regular expressions (matched using Spring's
`org.springframework.util.AntPathMatcher` utility). Both of the latter are effectively
wildcards.
[NOTE]
====
The default `ResourceLoader` in any standard `ApplicationContext` is in fact an instance
of `PathMatchingResourcePatternResolver` which implements the `ResourcePatternResolver`
interface. The same is true for the `ApplicationContext` instance itself which also
implements the `ResourcePatternResolver` interface and delegates to the default
`PathMatchingResourcePatternResolver`.
====
[[resources-resourceloaderaware]]
== The `ResourceLoaderAware` Interface
The `ResourceLoaderAware` interface is a special callback interface which identifies
components that expect to be provided a `ResourceLoader` reference. The following listing
shows the definition of the `ResourceLoaderAware` interface:
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface ResourceLoaderAware {
void setResourceLoader(ResourceLoader resourceLoader);
}
----
When a class implements `ResourceLoaderAware` and is deployed into an application context
(as a Spring-managed bean), it is recognized as `ResourceLoaderAware` by the application
context. The application context then invokes `setResourceLoader(ResourceLoader)`,
supplying itself as the argument (remember, all application contexts in Spring implement
the `ResourceLoader` interface).
Since an `ApplicationContext` is a `ResourceLoader`, the bean could also implement the
`ApplicationContextAware` interface and use the supplied application context directly to
load resources. However, in general, it is better to use the specialized `ResourceLoader`
interface if that is all you need. The code would be coupled only to the resource loading
interface (which can be considered a utility interface) and not to the whole Spring
`ApplicationContext` interface.
In application components, you may also rely upon autowiring of the `ResourceLoader` as
an alternative to implementing the `ResourceLoaderAware` interface. The _traditional_
`constructor` and `byType` autowiring modes (as described in <<beans-factory-autowire>>)
are capable of providing a `ResourceLoader` for either a constructor argument or a
setter method parameter, respectively. For more flexibility (including the ability to
autowire fields and multiple parameter methods), consider using the annotation-based
autowiring features. In that case, the `ResourceLoader` is autowired into a field,
constructor argument, or method parameter that expects the `ResourceLoader` type as long
as the field, constructor, or method in question carries the `@Autowired` annotation.
For more information, see <<beans-autowired-annotation>>.
NOTE: To load one or more `Resource` objects for a resource path that contains wildcards
or makes use of the special `classpath*:` resource prefix, consider having an instance of
<<resources-resourcepatternresolver,`ResourcePatternResolver`>> autowired into your
application components instead of `ResourceLoader`.
[[resources-as-dependencies]]
== Resources as Dependencies
If the bean itself is going to determine and supply the resource path through some sort
of dynamic process, it probably makes sense for the bean to use the `ResourceLoader` or
`ResourcePatternResolver` interface to load resources. For example, consider the loading
of a template of some sort, where the specific resource that is needed depends on the
role of the user. If the resources are static, it makes sense to eliminate the use of the
`ResourceLoader` interface (or `ResourcePatternResolver` interface) completely, have the
bean expose the `Resource` properties it needs, and expect them to be injected into it.
What makes it trivial to then inject these properties is that all application contexts
register and use a special JavaBeans `PropertyEditor`, which can convert `String` paths
to `Resource` objects. For example, the following `MyBean` class has a `template`
property of type `Resource`.
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
package example;
public class MyBean {
private Resource template;
public setTemplate(Resource template) {
this.template = template;
}
// ...
}
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
class MyBean(var template: Resource)
----
In an XML configuration file, the `template` property can be configured with a simple
string for that resource, as the following example shows:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="myBean" class="example.MyBean">
<property name="template" value="some/resource/path/myTemplate.txt"/>
</bean>
----
Note that the resource path has no prefix. Consequently, because the application context
itself is going to be used as the `ResourceLoader`, the resource is loaded through a
`ClassPathResource`, a `FileSystemResource`, or a `ServletContextResource`, depending on
the exact type of the application context.
If you need to force a specific `Resource` type to be used, you can use a prefix. The
following two examples show how to force a `ClassPathResource` and a `UrlResource` (the
latter being used to access a file in the filesystem):
[source,xml,indent=0,subs="verbatim,quotes"]
----
<property name="template" value="classpath:some/resource/path/myTemplate.txt">
----
[source,xml,indent=0,subs="verbatim,quotes"]
----
<property name="template" value="file:///some/resource/path/myTemplate.txt"/>
----
If the `MyBean` class is refactored for use with annotation-driven configuration, the
path to `myTemplate.txt` can be stored under a key named `template.path` -- for example,
in a properties file made available to the Spring `Environment` (see
<<beans-environment>>). The template path can then be referenced via the `@Value`
annotation using a property placeholder (see <<beans-value-annotations>>). Spring will
retrieve the value of the template path as a string, and a special `PropertyEditor` will
convert the string to a `Resource` object to be injected into the `MyBean` constructor.
The following example demonstrates how to achieve this.
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
@Component
public class MyBean {
private final Resource template;
public MyBean(@Value("${template.path}") Resource template) {
this.template = template;
}
// ...
}
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
@Component
class MyBean(@Value("\${template.path}") private val template: Resource)
----
If we want to support multiple templates discovered under the same path in multiple
locations in the classpath -- for example, in multiple jars in the classpath -- we can
use the special `classpath*:` prefix and wildcarding to define a `templates.path` key as
`classpath*:/config/templates/*.txt`. If we redefine the `MyBean` class as follows,
Spring will convert the template path pattern into an array of `Resource` objects that
can be injected into the `MyBean` constructor.
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
@Component
public class MyBean {
private final Resource[] templates;
public MyBean(@Value("${templates.path}") Resource[] templates) {
this.templates = templates;
}
// ...
}
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
@Component
class MyBean(@Value("\${templates.path}") private val templates: Resource[])
----
[[resources-app-ctx]]
== Application Contexts and Resource Paths
This section covers how to create application contexts with resources, including shortcuts
that work with XML, how to use wildcards, and other details.
[[resources-app-ctx-construction]]
=== Constructing Application Contexts
An application context constructor (for a specific application context type) generally
takes a string or array of strings as the location paths of the resources, such as
XML files that make up the definition of the context.
When such a location path does not have a prefix, the specific `Resource` type built from
that path and used to load the bean definitions depends on and is appropriate to the
specific application context. For example, consider the following example, which creates a
`ClassPathXmlApplicationContext`:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
ApplicationContext ctx = new ClassPathXmlApplicationContext("conf/appContext.xml");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx = ClassPathXmlApplicationContext("conf/appContext.xml")
----
The bean definitions are loaded from the classpath, because a `ClassPathResource` is
used. However, consider the following example, which creates a `FileSystemXmlApplicationContext`:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
ApplicationContext ctx =
new FileSystemXmlApplicationContext("conf/appContext.xml");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx = FileSystemXmlApplicationContext("conf/appContext.xml")
----
Now the bean definitions are loaded from a filesystem location (in this case, relative to
the current working directory).
Note that the use of the special `classpath` prefix or a standard URL prefix on the
location path overrides the default type of `Resource` created to load the bean
definitions. Consider the following example:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
ApplicationContext ctx =
new FileSystemXmlApplicationContext("classpath:conf/appContext.xml");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx = FileSystemXmlApplicationContext("classpath:conf/appContext.xml")
----
Using `FileSystemXmlApplicationContext` loads the bean definitions from the classpath.
However, it is still a `FileSystemXmlApplicationContext`. If it is subsequently used as a
`ResourceLoader`, any unprefixed paths are still treated as filesystem paths.
[[resources-app-ctx-classpathxml]]
==== Constructing `ClassPathXmlApplicationContext` Instances -- Shortcuts
The `ClassPathXmlApplicationContext` exposes a number of constructors to enable
convenient instantiation. The basic idea is that you can supply merely a string array
that contains only the filenames of the XML files themselves (without the leading path
information) and also supply a `Class`. The `ClassPathXmlApplicationContext` then derives
the path information from the supplied class.
Consider the following directory layout:
[literal,subs="verbatim,quotes"]
----
com/
example/
services.xml
repositories.xml
MessengerService.class
----
The following example shows how a `ClassPathXmlApplicationContext` instance composed of
the beans defined in files named `services.xml` and `repositories.xml` (which are on the
classpath) can be instantiated:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
ApplicationContext ctx = new ClassPathXmlApplicationContext(
new String[] {"services.xml", "repositories.xml"}, MessengerService.class);
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx = ClassPathXmlApplicationContext(arrayOf("services.xml", "repositories.xml"), MessengerService::class.java)
----
See the {api-spring-framework}/context/support/ClassPathXmlApplicationContext.html[`ClassPathXmlApplicationContext`]
javadoc for details on the various constructors.
[[resources-app-ctx-wildcards-in-resource-paths]]
=== Wildcards in Application Context Constructor Resource Paths
The resource paths in application context constructor values may be simple paths (as
shown earlier), each of which has a one-to-one mapping to a target `Resource` or,
alternately, may contain the special `classpath*:` prefix or internal Ant-style patterns
(matched by using Spring's `PathMatcher` utility). Both of the latter are effectively
wildcards.
One use for this mechanism is when you need to do component-style application assembly. All
components can _publish_ context definition fragments to a well-known location path, and,
when the final application context is created using the same path prefixed with
`classpath*:`, all component fragments are automatically picked up.
Note that this wildcarding is specific to the use of resource paths in application context
constructors (or when you use the `PathMatcher` utility class hierarchy directly) and is
resolved at construction time. It has nothing to do with the `Resource` type itself.
You cannot use the `classpath*:` prefix to construct an actual `Resource`, as
a resource points to just one resource at a time.
[[resources-app-ctx-ant-patterns-in-paths]]
==== Ant-style Patterns
Path locations can contain Ant-style patterns, as the following example shows:
[literal,subs="verbatim,quotes"]
----
/WEB-INF/\*-context.xml
com/mycompany/\**/applicationContext.xml
file:C:/some/path/\*-context.xml
classpath:com/mycompany/**/applicationContext.xml
----
When the path location contains an Ant-style pattern, the resolver follows a more complex
procedure to try to resolve the wildcard. It produces a `Resource` for the path up to the
last non-wildcard segment and obtains a URL from it. If this URL is not a `jar:` URL or
container-specific variant (such as `zip:` in WebLogic, `wsjar` in WebSphere, and so on),
a `java.io.File` is obtained from it and used to resolve the wildcard by traversing the
filesystem. In the case of a jar URL, the resolver either gets a
`java.net.JarURLConnection` from it or manually parses the jar URL and then traverses the
contents of the jar file to resolve the wildcards.
[[resources-app-ctx-portability]]
===== Implications on Portability
If the specified path is already a `file` URL (either implicitly because the base
`ResourceLoader` is a filesystem one or explicitly), wildcarding is guaranteed to
work in a completely portable fashion.
If the specified path is a `classpath` location, the resolver must obtain the last
non-wildcard path segment URL by making a `Classloader.getResource()` call. Since this
is just a node of the path (not the file at the end), it is actually undefined (in the
`ClassLoader` javadoc) exactly what sort of a URL is returned in this case. In practice,
it is always a `java.io.File` representing the directory (where the classpath resource
resolves to a filesystem location) or a jar URL of some sort (where the classpath resource
resolves to a jar location). Still, there is a portability concern on this operation.
If a jar URL is obtained for the last non-wildcard segment, the resolver must be able to
get a `java.net.JarURLConnection` from it or manually parse the jar URL, to be able to
walk the contents of the jar and resolve the wildcard. This does work in most environments
but fails in others, and we strongly recommend that the wildcard resolution of resources
coming from jars be thoroughly tested in your specific environment before you rely on it.
[[resources-classpath-wildcards]]
==== The `classpath*:` Prefix
When constructing an XML-based application context, a location string may use the
special `classpath*:` prefix, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
ApplicationContext ctx =
new ClassPathXmlApplicationContext("classpath*:conf/appContext.xml");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx = ClassPathXmlApplicationContext("classpath*:conf/appContext.xml")
----
This special prefix specifies that all classpath resources that match the given name
must be obtained (internally, this essentially happens through a call to
`ClassLoader.getResources(...)`) and then merged to form the final application
context definition.
NOTE: The wildcard classpath relies on the `getResources()` method of the underlying
`ClassLoader`. As most application servers nowadays supply their own `ClassLoader`
implementation, the behavior might differ, especially when dealing with jar files. A
simple test to check if `classpath*` works is to use the `ClassLoader` to load a file from
within a jar on the classpath:
`getClass().getClassLoader().getResources("<someFileInsideTheJar>")`. Try this test with
files that have the same name but reside in two different locations -- for example, files
with the same name and same path but in different jars on the classpath. In case an
inappropriate result is returned, check the application server documentation for settings
that might affect the `ClassLoader` behavior.
You can also combine the `classpath*:` prefix with a `PathMatcher` pattern in the
rest of the location path (for example, `classpath*:META-INF/*-beans.xml`). In this
case, the resolution strategy is fairly simple: A `ClassLoader.getResources()` call is
used on the last non-wildcard path segment to get all the matching resources in the
class loader hierarchy and then, off each resource, the same `PathMatcher` resolution
strategy described earlier is used for the wildcard subpath.
[[resources-wildcards-in-path-other-stuff]]
==== Other Notes Relating to Wildcards
Note that `classpath*:`, when combined with Ant-style patterns, only works
reliably with at least one root directory before the pattern starts, unless the actual
target files reside in the file system. This means that a pattern such as
`classpath*:*.xml` might not retrieve files from the root of jar files but rather only
from the root of expanded directories.
Spring's ability to retrieve classpath entries originates from the JDK's
`ClassLoader.getResources()` method, which only returns file system locations for an
empty string (indicating potential roots to search). Spring evaluates
`URLClassLoader` runtime configuration and the `java.class.path` manifest in jar files
as well, but this is not guaranteed to lead to portable behavior.
[NOTE]
====
The scanning of classpath packages requires the presence of corresponding directory
entries in the classpath. When you build JARs with Ant, do not activate the `files-only`
switch of the JAR task. Also, classpath directories may not get exposed based on security
policies in some environments -- for example, stand-alone applications on JDK 1.7.0_45
and higher (which requires 'Trusted-Library' to be set up in your manifests. See
https://stackoverflow.com/questions/19394570/java-jre-7u45-breaks-classloader-getresources).
On JDK 9's module path (Jigsaw), Spring's classpath scanning generally works as expected.
Putting resources into a dedicated directory is highly recommendable here as well,
avoiding the aforementioned portability problems with searching the jar file root level.
====
Ant-style patterns with `classpath:` resources are not guaranteed to find matching
resources if the root package to search is available in multiple classpath locations.
Consider the following example of a resource location:
[literal,subs="verbatim,quotes"]
----
com/mycompany/package1/service-context.xml
----
Now consider an Ant-style path that someone might use to try to find that file:
[literal,subs="verbatim,quotes"]
----
classpath:com/mycompany/**/service-context.xml
----
Such a resource may exist in only one location in the classpath, but when a path such as
the preceding example is used to try to resolve it, the resolver works off the (first)
URL returned by `getResource("com/mycompany");`. If this base package node exists in
multiple `ClassLoader` locations, the desired resource may not exist in the first
location found. Therefore, in such cases you should prefer using `classpath*:` with the
same Ant-style pattern, which searches all classpath locations that contain the
`com.mycompany` base package: `classpath*:com/mycompany/**/service-context.xml`.
[[resources-filesystemresource-caveats]]
=== `FileSystemResource` Caveats
A `FileSystemResource` that is not attached to a `FileSystemApplicationContext` (that
is, when a `FileSystemApplicationContext` is not the actual `ResourceLoader`) treats
absolute and relative paths as you would expect. Relative paths are relative to the
current working directory, while absolute paths are relative to the root of the
filesystem.
For backwards compatibility (historical) reasons however, this changes when the
`FileSystemApplicationContext` is the `ResourceLoader`. The
`FileSystemApplicationContext` forces all attached `FileSystemResource` instances
to treat all location paths as relative, whether they start with a leading slash or not.
In practice, this means the following examples are equivalent:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
ApplicationContext ctx =
new FileSystemXmlApplicationContext("conf/context.xml");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx = FileSystemXmlApplicationContext("conf/context.xml")
----
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
ApplicationContext ctx =
new FileSystemXmlApplicationContext("/conf/context.xml");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx = FileSystemXmlApplicationContext("/conf/context.xml")
----
The following examples are also equivalent (even though it would make sense for them to be different, as one
case is relative and the other absolute):
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
FileSystemXmlApplicationContext ctx = ...;
ctx.getResource("some/resource/path/myTemplate.txt");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx: FileSystemXmlApplicationContext = ...
ctx.getResource("some/resource/path/myTemplate.txt")
----
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
FileSystemXmlApplicationContext ctx = ...;
ctx.getResource("/some/resource/path/myTemplate.txt");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
val ctx: FileSystemXmlApplicationContext = ...
ctx.getResource("/some/resource/path/myTemplate.txt")
----
In practice, if you need true absolute filesystem paths, you should avoid using
absolute paths with `FileSystemResource` or `FileSystemXmlApplicationContext` and
force the use of a `UrlResource` by using the `file:` URL prefix. The following examples
show how to do so:
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
// actual context type doesn't matter, the Resource will always be UrlResource
ctx.getResource("file:///some/resource/path/myTemplate.txt");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
// actual context type doesn't matter, the Resource will always be UrlResource
ctx.getResource("file:///some/resource/path/myTemplate.txt")
----
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
// force this FileSystemXmlApplicationContext to load its definition via a UrlResource
ApplicationContext ctx =
new FileSystemXmlApplicationContext("file:///conf/context.xml");
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
// force this FileSystemXmlApplicationContext to load its definition via a UrlResource
val ctx = FileSystemXmlApplicationContext("file:///conf/context.xml")
----
@@ -1,41 +0,0 @@
[[spring-jcl]]
= Logging
Since Spring Framework 5.0, Spring comes with its own Commons Logging bridge implemented
in the `spring-jcl` module. The implementation checks for the presence of the Log4j 2.x
API and the SLF4J 1.7 API in the classpath and uses the first one of those found as the
logging implementation, falling back to the Java platform's core logging facilities (also
known as _JUL_ or `java.util.logging`) if neither Log4j 2.x nor SLF4J is available.
Put Log4j 2.x or Logback (or another SLF4J provider) in your classpath, without any extra
bridges, and let the framework auto-adapt to your choice. For further information see the
https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-logging[Spring
Boot Logging Reference Documentation].
[NOTE]
====
Spring's Commons Logging variant is only meant to be used for infrastructure logging
purposes in the core framework and in extensions.
For logging needs within application code, prefer direct use of Log4j 2.x, SLF4J, or JUL.
====
A `Log` implementation may be retrieved via `org.apache.commons.logging.LogFactory` as in
the following example.
[source,java,indent=0,subs="verbatim,quotes",role="primary"]
.Java
----
public class MyBean {
private final Log log = LogFactory.getLog(getClass());
// ...
}
----
[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
.Kotlin
----
class MyBean {
private val log = LogFactory.getLog(javaClass)
// ...
}
----
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@@ -1,95 +0,0 @@
[[data.access.appendix]]
= Appendix
[[data.access.xsd-schemas]]
== XML Schemas
This part of the appendix lists XML schemas for data access, including the following:
* <<xsd-schemas-tx>>
* <<xsd-schemas-jdbc>>
[[xsd-schemas-tx]]
=== The `tx` Schema
The `tx` tags deal with configuring all of those beans in Spring's comprehensive support
for transactions. These tags are covered in the chapter entitled
<<data-access.adoc#transaction, Transaction Management>>.
TIP: We strongly encourage you to look at the `'spring-tx.xsd'` file that ships with the
Spring distribution. This file contains the XML Schema for Spring's transaction
configuration and covers all of the various elements in the `tx` namespace, including
attribute defaults and similar information. This file is documented inline, and, thus,
the information is not repeated here in the interests of adhering to the DRY (Don't
Repeat Yourself) principle.
In the interest of completeness, to use the elements in the `tx` schema, you need to have
the following preamble at the top of your Spring XML configuration file. The text in the
following snippet references the correct schema so that the tags in the `tx` namespace
are available to you:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<?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:tx="http://www.springframework.org/schema/tx" <1>
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd <2>
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- bean definitions here -->
</beans>
----
<1> Declare usage of the `tx` namespace.
<2> Specify the location (with other schema locations).
NOTE: Often, when you use the elements in the `tx` namespace, you are also using the
elements from the `aop` namespace (since the declarative transaction support in Spring is
implemented by using AOP). The preceding XML snippet contains the relevant lines needed
to reference the `aop` schema so that the elements in the `aop` namespace are available
to you.
[[xsd-schemas-jdbc]]
=== The `jdbc` Schema
The `jdbc` elements let you quickly configure an embedded database or initialize an
existing data source. These elements are documented in
<<data-access.adoc#jdbc-embedded-database-support, Embedded Database Support>> and
<<data-access.adoc#jdbc-initializing-datasource, Initializing a DataSource>>, respectively.
To use the elements in the `jdbc` schema, you need to have the following preamble at the
top of your Spring XML configuration file. The text in the following snippet references
the correct schema so that the elements in the `jdbc` namespace are available to you:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<?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:jdbc="http://www.springframework.org/schema/jdbc" <1>
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/jdbc
https://www.springframework.org/schema/jdbc/spring-jdbc.xsd"> <2>
<!-- bean definitions here -->
</beans>
----
<1> Declare usage of the `jdbc` namespace.
<2> Specify the location (with other schema locations).
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@@ -1,9 +0,0 @@
<div id="header">
<h1>Spring Framework Documentation</h1>
<!--
<div class="details">
<span id="revnumber">{revnumber}</span>
</div>
-->
<span><strong>{revnumber}</strong></span>
</div>
@@ -1,38 +0,0 @@
:noheader:
= Spring Framework Documentation
include::attributes.adoc[]
[horizontal]
<<overview.adoc#overview, Overview>> :: History, Design Philosophy, Feedback,
Getting Started.
<<core.adoc#spring-core, Core>> :: IoC Container, Events, Resources, i18n,
Validation, Data Binding, Type Conversion, SpEL, AOP, AOT.
<<testing.adoc#testing, Testing>> :: Mock Objects, TestContext Framework,
Spring MVC Test, WebTestClient.
<<data-access.adoc#spring-data-tier, Data Access>> :: Transactions, DAO Support,
JDBC, R2DBC, O/R Mapping, XML Marshalling.
<<web.adoc#spring-web, Web Servlet>> :: Spring MVC, WebSocket, SockJS,
STOMP Messaging.
<<web-reactive.adoc#spring-webflux, Web Reactive>> :: Spring WebFlux, WebClient,
WebSocket, RSocket.
<<integration.adoc#spring-integration, Integration>> :: REST Clients, JMS, JCA, JMX,
Email, Tasks, Scheduling, Caching, Observability.
<<languages.adoc#languages, Languages>> :: Kotlin, Groovy, Dynamic Languages.
<<appendix.adoc#appendix, Appendix>> :: Spring properties.
https://github.com/spring-projects/spring-framework/wiki[Wiki] :: What's New,
Upgrade Notes, Supported Versions, additional cross-version information.
NOTE: This documentation is also available in {docs-spring-framework}/reference/pdf/spring-framework.pdf[PDF] format.
Rod Johnson, Juergen Hoeller, Keith Donald, Colin Sampaleanu, Rob Harrop, Thomas Risberg,
Alef Arendsen, Darren Davison, Dmitriy Kopylenko, Mark Pollack, Thierry Templier, Erwin
Vervaet, Portia Tung, Ben Hale, Adrian Colyer, John Lewis, Costin Leau, Mark Fisher, Sam
Brannen, Ramnivas Laddad, Arjen Poutsma, Chris Beams, Tareq Abedrabbo, Andy Clement, Dave
Syer, Oliver Gierke, Rossen Stoyanchev, Phillip Webb, Rob Winch, Brian Clozel, Stephane
Nicoll, Sebastien Deleuze, Jay Bryant, Mark Paluch
Copyright © 2002 - 2023 VMware, Inc. All Rights Reserved.
Copies of this document may be made for your own use and for distribution to others,
provided that you do not charge any fee for such copies and further provided that each
copy contains this Copyright Notice, whether distributed in print or electronically.
@@ -1,23 +0,0 @@
[[spring-integration]]
= Integration
include::attributes.adoc[]
include::page-layout.adoc[]
This part of the reference documentation covers Spring Framework's integration with
a number of technologies.
include::integration/rest-clients.adoc[leveloffset=+1]
include::integration/jms.adoc[leveloffset=+1]
include::integration/jmx.adoc[leveloffset=+1]
include::integration/email.adoc[leveloffset=+1]
include::integration/scheduling.adoc[leveloffset=+1]
include::integration/cache.adoc[leveloffset=+1]
include::integration/observability.adoc[leveloffset=+1]
include::integration/integration-appendix.adoc[leveloffset=+1]
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@@ -1,303 +0,0 @@
[[mail]]
= Email
This section describes how to send email with the Spring Framework.
.Library dependencies
****
The following JAR needs to be on the classpath of your application in order to use the
Spring Framework's email support:
* The https://jakartaee.github.io/mail-api/[Jakarta Mail] library
This library is freely available on the web -- for example, in Maven Central as
`com.sun.mail:jakarta.mail`. Please make sure to use the latest 2.x version (which uses
the `jakarta.mail` package namespace) rather than Jakarta Mail 1.6.x (which uses the
`javax.mail` package namespace).
****
The Spring Framework provides a helpful utility library for sending email that shields
you from the specifics of the underlying mailing system and is responsible for
low-level resource handling on behalf of the client.
The `org.springframework.mail` package is the root level package for the Spring
Framework's email support. The central interface for sending emails is the `MailSender`
interface. A simple value object that encapsulates the properties of a simple mail such
as `from` and `to` (plus many others) is the `SimpleMailMessage` class. This package
also contains a hierarchy of checked exceptions that provide a higher level of
abstraction over the lower level mail system exceptions, with the root exception being
`MailException`. See the {api-spring-framework}/mail/MailException.html[javadoc]
for more information on the rich mail exception hierarchy.
The `org.springframework.mail.javamail.JavaMailSender` interface adds specialized
JavaMail features, such as MIME message support to the `MailSender` interface
(from which it inherits). `JavaMailSender` also provides a callback interface called
`org.springframework.mail.javamail.MimeMessagePreparator` for preparing a `MimeMessage`.
[[mail-usage]]
== Usage
Assume that we have a business interface called `OrderManager`, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface OrderManager {
void placeOrder(Order order);
}
----
Further assume that we have a requirement stating that an email message with an
order number needs to be generated and sent to a customer who placed the relevant order.
[[mail-usage-simple]]
=== Basic `MailSender` and `SimpleMailMessage` Usage
The following example shows how to use `MailSender` and `SimpleMailMessage` to send an
email when someone places an order:
[source,java,indent=0,subs="verbatim,quotes"]
----
import org.springframework.mail.MailException;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
public class SimpleOrderManager implements OrderManager {
private MailSender mailSender;
private SimpleMailMessage templateMessage;
public void setMailSender(MailSender mailSender) {
this.mailSender = mailSender;
}
public void setTemplateMessage(SimpleMailMessage templateMessage) {
this.templateMessage = templateMessage;
}
public void placeOrder(Order order) {
// Do the business calculations...
// Call the collaborators to persist the order...
// Create a thread safe "copy" of the template message and customize it
SimpleMailMessage msg = new SimpleMailMessage(this.templateMessage);
msg.setTo(order.getCustomer().getEmailAddress());
msg.setText(
"Dear " + order.getCustomer().getFirstName()
+ order.getCustomer().getLastName()
+ ", thank you for placing order. Your order number is "
+ order.getOrderNumber());
try {
this.mailSender.send(msg);
}
catch (MailException ex) {
// simply log it and go on...
System.err.println(ex.getMessage());
}
}
}
----
The following example shows the bean definitions for the preceding code:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
<property name="host" value="mail.mycompany.example"/>
</bean>
<!-- this is a template message that we can pre-load with default state -->
<bean id="templateMessage" class="org.springframework.mail.SimpleMailMessage">
<property name="from" value="customerservice@mycompany.example"/>
<property name="subject" value="Your order"/>
</bean>
<bean id="orderManager" class="com.mycompany.businessapp.support.SimpleOrderManager">
<property name="mailSender" ref="mailSender"/>
<property name="templateMessage" ref="templateMessage"/>
</bean>
----
[[mail-usage-mime]]
=== Using `JavaMailSender` and `MimeMessagePreparator`
This section describes another implementation of `OrderManager` that uses the `MimeMessagePreparator`
callback interface. In the following example, the `mailSender` property is of type
`JavaMailSender` so that we are able to use the JavaMail `MimeMessage` class:
[source,java,indent=0,subs="verbatim,quotes"]
----
import jakarta.mail.Message;
import jakarta.mail.MessagingException;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeMessage;
import jakarta.mail.internet.MimeMessage;
import org.springframework.mail.MailException;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessagePreparator;
public class SimpleOrderManager implements OrderManager {
private JavaMailSender mailSender;
public void setMailSender(JavaMailSender mailSender) {
this.mailSender = mailSender;
}
public void placeOrder(final Order order) {
// Do the business calculations...
// Call the collaborators to persist the order...
MimeMessagePreparator preparator = new MimeMessagePreparator() {
public void prepare(MimeMessage mimeMessage) throws Exception {
mimeMessage.setRecipient(Message.RecipientType.TO,
new InternetAddress(order.getCustomer().getEmailAddress()));
mimeMessage.setFrom(new InternetAddress("mail@mycompany.example"));
mimeMessage.setText("Dear " + order.getCustomer().getFirstName() + " " +
order.getCustomer().getLastName() + ", thanks for your order. " +
"Your order number is " + order.getOrderNumber() + ".");
}
};
try {
this.mailSender.send(preparator);
}
catch (MailException ex) {
// simply log it and go on...
System.err.println(ex.getMessage());
}
}
}
----
NOTE: The mail code is a crosscutting concern and could well be a candidate for
refactoring into a <<core.adoc#aop, custom Spring AOP aspect>>, which could then
be run at appropriate joinpoints on the `OrderManager` target.
The Spring Framework's mail support ships with the standard JavaMail implementation.
See the relevant javadoc for more information.
[[mail-javamail-mime]]
== Using the JavaMail `MimeMessageHelper`
A class that comes in pretty handy when dealing with JavaMail messages is
`org.springframework.mail.javamail.MimeMessageHelper`, which shields you from
having to use the verbose JavaMail API. Using the `MimeMessageHelper`, it is
pretty easy to create a `MimeMessage`, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
// of course you would use DI in any real-world cases
JavaMailSenderImpl sender = new JavaMailSenderImpl();
sender.setHost("mail.host.com");
MimeMessage message = sender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message);
helper.setTo("test@host.com");
helper.setText("Thank you for ordering!");
sender.send(message);
----
[[mail-javamail-mime-attachments]]
=== Sending Attachments and Inline Resources
Multipart email messages allow for both attachments and inline resources. Examples of
inline resources include an image or a stylesheet that you want to use in your message but
that you do not want displayed as an attachment.
[[mail-javamail-mime-attachments-attachment]]
==== Attachments
The following example shows you how to use the `MimeMessageHelper` to send an email
with a single JPEG image attachment:
[source,java,indent=0,subs="verbatim,quotes"]
----
JavaMailSenderImpl sender = new JavaMailSenderImpl();
sender.setHost("mail.host.com");
MimeMessage message = sender.createMimeMessage();
// use the true flag to indicate you need a multipart message
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setTo("test@host.com");
helper.setText("Check out this image!");
// let's attach the infamous windows Sample file (this time copied to c:/)
FileSystemResource file = new FileSystemResource(new File("c:/Sample.jpg"));
helper.addAttachment("CoolImage.jpg", file);
sender.send(message);
----
[[mail-javamail-mime-attachments-inline]]
==== Inline Resources
The following example shows you how to use the `MimeMessageHelper` to send an email
with an inline image:
[source,java,indent=0,subs="verbatim,quotes"]
----
JavaMailSenderImpl sender = new JavaMailSenderImpl();
sender.setHost("mail.host.com");
MimeMessage message = sender.createMimeMessage();
// use the true flag to indicate you need a multipart message
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setTo("test@host.com");
// use the true flag to indicate the text included is HTML
helper.setText("<html><body><img src='cid:identifier1234'></body></html>", true);
// let's include the infamous windows Sample file (this time copied to c:/)
FileSystemResource res = new FileSystemResource(new File("c:/Sample.jpg"));
helper.addInline("identifier1234", res);
sender.send(message);
----
WARNING: Inline resources are added to the `MimeMessage` by using the specified `Content-ID`
(`identifier1234` in the above example). The order in which you add the text
and the resource are very important. Be sure to first add the text and then
the resources. If you are doing it the other way around, it does not work.
[[mail-templates]]
=== Creating Email Content by Using a Templating Library
The code in the examples shown in the previous sections explicitly created the content of the email message,
by using methods calls such as `message.setText(..)`. This is fine for simple cases, and it
is okay in the context of the aforementioned examples, where the intent was to show you
the very basics of the API.
In your typical enterprise application, though, developers often do not create the content
of email messages by using the previously shown approach for a number of reasons:
* Creating HTML-based email content in Java code is tedious and error prone.
* There is no clear separation between display logic and business logic.
* Changing the display structure of the email content requires writing Java code,
recompiling, redeploying, and so on.
Typically, the approach taken to address these issues is to use a template library (such
as FreeMarker) to define the display structure of email content. This leaves your code
tasked only with creating the data that is to be rendered in the email template and
sending the email. It is definitely a best practice when the content of your email messages
becomes even moderately complex, and, with the Spring Framework's support classes for
FreeMarker, it becomes quite easy to do.
@@ -1,339 +0,0 @@
[[integration.appendix]]
= Appendix
[[integration.appendix.xsd-schemas]]
== XML Schemas
This part of the appendix lists XML schemas related to integration technologies.
[[integration.appendix.xsd-schemas-jee]]
=== The `jee` Schema
The `jee` elements deal with issues related to Jakarta EE (Enterprise Edition) configuration,
such as looking up a JNDI object and defining EJB references.
To use the elements in the `jee` schema, you need to have the following preamble at the top
of your Spring XML configuration file. The text in the following snippet references the
correct schema so that the elements in the `jee` namespace are available to you:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<?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:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/jee
https://www.springframework.org/schema/jee/spring-jee.xsd">
<!-- bean definitions here -->
</beans>
----
[[integration.appendix.xsd-schemas-jee-jndi-lookup]]
==== <jee:jndi-lookup/> (simple)
The following example shows how to use JNDI to look up a data source without the `jee` schema:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/MyDataSource"/>
</bean>
<bean id="userDao" class="com.foo.JdbcUserDao">
<!-- Spring will do the cast automatically (as usual) -->
<property name="dataSource" ref="dataSource"/>
</bean>
----
The following example shows how to use JNDI to look up a data source with the `jee`
schema:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<jee:jndi-lookup id="dataSource" jndi-name="jdbc/MyDataSource"/>
<bean id="userDao" class="com.foo.JdbcUserDao">
<!-- Spring will do the cast automatically (as usual) -->
<property name="dataSource" ref="dataSource"/>
</bean>
----
[[integration.appendix.xsd-schemas-jee-jndi-lookup-environment-single]]
==== `<jee:jndi-lookup/>` (with Single JNDI Environment Setting)
The following example shows how to use JNDI to look up an environment variable without
`jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="simple" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/MyDataSource"/>
<property name="jndiEnvironment">
<props>
<prop key="ping">pong</prop>
</props>
</property>
</bean>
----
The following example shows how to use JNDI to look up an environment variable with `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<jee:jndi-lookup id="simple" jndi-name="jdbc/MyDataSource">
<jee:environment>ping=pong</jee:environment>
</jee:jndi-lookup>
----
[[integration.appendix.xsd-schemas-jee-jndi-lookup-environment-multiple]]
==== `<jee:jndi-lookup/>` (with Multiple JNDI Environment Settings)
The following example shows how to use JNDI to look up multiple environment variables
without `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="simple" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/MyDataSource"/>
<property name="jndiEnvironment">
<props>
<prop key="sing">song</prop>
<prop key="ping">pong</prop>
</props>
</property>
</bean>
----
The following example shows how to use JNDI to look up multiple environment variables with
`jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<jee:jndi-lookup id="simple" jndi-name="jdbc/MyDataSource">
<!-- newline-separated, key-value pairs for the environment (standard Properties format) -->
<jee:environment>
sing=song
ping=pong
</jee:environment>
</jee:jndi-lookup>
----
[[integration.appendix.xsd-schemas-jee-jndi-lookup-complex]]
==== `<jee:jndi-lookup/>` (Complex)
The following example shows how to use JNDI to look up a data source and a number of
different properties without `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="simple" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/MyDataSource"/>
<property name="cache" value="true"/>
<property name="resourceRef" value="true"/>
<property name="lookupOnStartup" value="false"/>
<property name="expectedType" value="com.myapp.DefaultThing"/>
<property name="proxyInterface" value="com.myapp.Thing"/>
</bean>
----
The following example shows how to use JNDI to look up a data source and a number of
different properties with `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<jee:jndi-lookup id="simple"
jndi-name="jdbc/MyDataSource"
cache="true"
resource-ref="true"
lookup-on-startup="false"
expected-type="com.myapp.DefaultThing"
proxy-interface="com.myapp.Thing"/>
----
[[integration.appendix.xsd-schemas-jee-local-slsb]]
==== `<jee:local-slsb/>` (Simple)
The `<jee:local-slsb/>` element configures a reference to a local EJB Stateless Session Bean.
The following example shows how to configures a reference to a local EJB Stateless Session Bean
without `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="simple"
class="org.springframework.ejb.access.LocalStatelessSessionProxyFactoryBean">
<property name="jndiName" value="ejb/RentalServiceBean"/>
<property name="businessInterface" value="com.foo.service.RentalService"/>
</bean>
----
The following example shows how to configures a reference to a local EJB Stateless Session Bean
with `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<jee:local-slsb id="simpleSlsb" jndi-name="ejb/RentalServiceBean"
business-interface="com.foo.service.RentalService"/>
----
[[integration.appendix.xsd-schemas-jee-local-slsb-complex]]
==== `<jee:local-slsb/>` (Complex)
The `<jee:local-slsb/>` element configures a reference to a local EJB Stateless Session Bean.
The following example shows how to configures a reference to a local EJB Stateless Session Bean
and a number of properties without `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="complexLocalEjb"
class="org.springframework.ejb.access.LocalStatelessSessionProxyFactoryBean">
<property name="jndiName" value="ejb/RentalServiceBean"/>
<property name="businessInterface" value="com.example.service.RentalService"/>
<property name="cacheHome" value="true"/>
<property name="lookupHomeOnStartup" value="true"/>
<property name="resourceRef" value="true"/>
</bean>
----
The following example shows how to configures a reference to a local EJB Stateless Session Bean
and a number of properties with `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<jee:local-slsb id="complexLocalEjb"
jndi-name="ejb/RentalServiceBean"
business-interface="com.foo.service.RentalService"
cache-home="true"
lookup-home-on-startup="true"
resource-ref="true">
----
[[integration.appendix.xsd-schemas-jee-remote-slsb]]
==== <jee:remote-slsb/>
The `<jee:remote-slsb/>` element configures a reference to a `remote` EJB Stateless Session Bean.
The following example shows how to configures a reference to a remote EJB Stateless Session Bean
without `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="complexRemoteEjb"
class="org.springframework.ejb.access.SimpleRemoteStatelessSessionProxyFactoryBean">
<property name="jndiName" value="ejb/MyRemoteBean"/>
<property name="businessInterface" value="com.foo.service.RentalService"/>
<property name="cacheHome" value="true"/>
<property name="lookupHomeOnStartup" value="true"/>
<property name="resourceRef" value="true"/>
<property name="homeInterface" value="com.foo.service.RentalService"/>
<property name="refreshHomeOnConnectFailure" value="true"/>
</bean>
----
The following example shows how to configures a reference to a remote EJB Stateless Session Bean
with `jee`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<jee:remote-slsb id="complexRemoteEjb"
jndi-name="ejb/MyRemoteBean"
business-interface="com.foo.service.RentalService"
cache-home="true"
lookup-home-on-startup="true"
resource-ref="true"
home-interface="com.foo.service.RentalService"
refresh-home-on-connect-failure="true">
----
[[integration.appendix.xsd-schemas-jms]]
=== The `jms` Schema
The `jms` elements deal with configuring JMS-related beans, such as Spring's
<<integration.adoc#jms-mdp, Message Listener Containers>>. These elements are detailed in the
section of the <<integration.adoc#jms, JMS chapter>> entitled <<integration.adoc#jms-namespace,
JMS Namespace Support>>. See that chapter for full details on this support
and the `jms` elements themselves.
In the interest of completeness, to use the elements in the `jms` schema, you need to have
the following preamble at the top of your Spring XML configuration file. The text in the
following snippet references the correct schema so that the elements in the `jms` namespace
are available to you:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<?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:jms="http://www.springframework.org/schema/jms"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/jms
https://www.springframework.org/schema/jms/spring-jms.xsd">
<!-- bean definitions here -->
</beans>
----
[[integration.appendix.xsd-schemas-context-mbe]]
=== Using `<context:mbean-export/>`
This element is detailed in
<<integration.adoc#jmx-context-mbeanexport, Configuring Annotation-based MBean Export>>.
[[integration.appendix.xsd-schemas-cache]]
=== The `cache` Schema
You can use the `cache` elements to enable support for Spring's `@CacheEvict`, `@CachePut`,
and `@Caching` annotations. It it also supports declarative XML-based caching. See
<<integration.adoc#cache-annotation-enable, Enabling Caching Annotations>> and
<<integration.adoc#cache-declarative-xml, Declarative XML-based Caching>> for details.
To use the elements in the `cache` schema, you need to have the following preamble at the
top of your Spring XML configuration file. The text in the following snippet references
the correct schema so that the elements in the `cache` namespace are available to you:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<?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:cache="http://www.springframework.org/schema/cache"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/cache
https://www.springframework.org/schema/cache/spring-cache.xsd">
<!-- bean definitions here -->
</beans>
----
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@@ -1,193 +0,0 @@
[[integration.observability]]
= Observability Support
Micrometer defines an https://micrometer.io/docs/observation[Observation concept that enables both Metrics and Traces] in applications.
Metrics support offers a way to create timers, gauges or counters for collecting statistics about the runtime behavior of your application.
Metrics can help you to track error rates, usage patterns, performance and more.
Traces provide a holistic view of an entire system, crossing application boundaries; you can zoom in on particular user requests and follow their entire completion across applications.
Spring Framework instruments various parts of its own codebase to publish observations if an `ObservationRegistry` is configured.
You can learn more about {docs-spring-boot}/html/actuator.html#actuator.metrics[configuring the observability infrastructure in Spring Boot].
[[integration.observability.concepts]]
== Micrometer Observation concepts
If you are not familiar with Micrometer Observation, here's a quick summary of the new concepts you should know about.
* `Observation` is the actual recording of something happening in your application. This is processed by `ObservationHandler` implementations to produce metrics or traces.
* Each observation has a corresponding `ObservationContext` implementation; this type holds all the relevant information for extracting metadata for it.
In the case of an HTTP server observation, the context implementation could hold the HTTP request, the HTTP response, any Exception thrown during processing...
* Each `Observation` holds `KeyValues` metadata. In the case of a server HTTP observation, this could be the HTTP request method, the HTTP response status...
This metadata is contributed by `ObservationConvention` implementations which should declare the type of `ObservationContext` they support.
* `KeyValues` are said to be "low cardinality" if there is a low, bounded number of possible values for the `KeyValue` tuple (HTTP method is a good example).
Low cardinality values are contributed to metrics only.
High cardinality values are on the other hand unbounded (for example, HTTP request URIs) and are only contributed to Traces.
* An `ObservationDocumentation` documents all observations in a particular domain, listing the expected key names and their meaning.
[[integration.observability.config]]
== Configuring Observations
Global configuration options are available at the `ObservationRegistry#observationConfig()` level.
Each instrumented component will provide two extension points:
* setting the `ObservationRegistry`; if not set, observations will not be recorded and will be no-ops
* providing a custom `ObservationConvention` to change the default observation name and extracted `KeyValues`
[[integration.observability.config.conventions]]
=== Using custom Observation conventions
Let's take the example of the Spring MVC "http.server.requests" metrics instrumentation with the `ServerHttpObservationFilter`.
This observation is using a `ServerRequestObservationConvention` with a `ServerRequestObservationContext`; custom conventions can be configured on the Servlet filter.
If you would like to customize the metadata produced with the observation, you can extend the `DefaultServerRequestObservationConvention` for your requirements:
include::code:ExtendedServerRequestObservationConvention[]
If you want full control, you can then implement the entire convention contract for the observation you're interested in:
include::code:CustomServerRequestObservationConvention[]
You can also achieve similar goals using a custom `ObservationFilter` - adding or removing key values for an observation.
Filters do not replace the default convention and are used as a post-processing component.
include::code:ServerRequestObservationFilter[]
You can configure `ObservationFilter` instances on the `ObservationRegistry`.
[[integration.observability.http-server]]
== HTTP Server instrumentation
HTTP server exchanges observations are created with the name `"http.server.requests"` for Servlet and Reactive applications.
[[integration.observability.http-server.servlet]]
=== Servlet applications
Applications need to configure the `org.springframework.web.filter.ServerHttpObservationFilter` Servlet filter in their application.
It is using the `org.springframework.http.server.observation.DefaultServerRequestObservationConvention` by default, backed by the `ServerRequestObservationContext`.
This will only record an observation as an error if the `Exception` has not been handled by the web Framework and has bubbled up to the Servlet filter.
Typically, all exceptions handled by Spring MVC's `@ExceptionHandler` and <<web.adoc#mvc-ann-rest-exceptions,`ProblemDetail` support>> will not be recorded with the observation.
You can, at any point during request processing, set the error field on the `ObservationContext` yourself:
include::code:UserController[]
By default, the following `KeyValues` are created:
.Low cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`exception` _(required)_|Name of the exception thrown during the exchange, or `KeyValue#NONE_VALUE`} if no exception happened.
|`method` _(required)_|Name of HTTP request method or `"none"` if the request was not received properly.
|`outcome` _(required)_|Outcome of the HTTP server exchange.
|`status` _(required)_|HTTP response raw status code, or `"UNKNOWN"` if no response was created.
|`uri` _(required)_|URI pattern for the matching handler if available, falling back to `REDIRECTION` for 3xx responses, `NOT_FOUND` for 404 responses, `root` for requests with no path info, and `UNKNOWN` for all other requests.
|===
.High cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`http.url` _(required)_|HTTP request URI.
|===
[[integration.observability.http-server.reactive]]
=== Reactive applications
Applications need to configure the `org.springframework.web.filter.reactive.ServerHttpObservationFilter` reactive `WebFilter` in their application.
It is using the `org.springframework.http.server.reactive.observation.DefaultServerRequestObservationConvention` by default, backed by the `ServerRequestObservationContext`.
This will only record an observation as an error if the `Exception` has not been handled by the web Framework and has bubbled up to the `WebFilter`.
Typically, all exceptions handled by Spring WebFlux's `@ExceptionHandler` and <<web.adoc#webflux-ann-rest-exceptions,`ProblemDetail` support>> will not be recorded with the observation.
You can, at any point during request processing, set the error field on the `ObservationContext` yourself:
include::code:UserController[]
By default, the following `KeyValues` are created:
.Low cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`exception` _(required)_|Name of the exception thrown during the exchange, or `"none"` if no exception happened.
|`method` _(required)_|Name of HTTP request method or `"none"` if the request was not received properly.
|`outcome` _(required)_|Outcome of the HTTP server exchange.
|`status` _(required)_|HTTP response raw status code, or `"UNKNOWN"` if no response was created.
|`uri` _(required)_|URI pattern for the matching handler if available, falling back to `REDIRECTION` for 3xx responses, `NOT_FOUND` for 404 responses, `root` for requests with no path info, and `UNKNOWN` for all other requests.
|===
.High cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`http.url` _(required)_|HTTP request URI.
|===
[[integration.observability.http-client]]
== HTTP Client instrumentation
HTTP client exchanges observations are created with the name `"http.client.requests"` for blocking and reactive clients.
Unlike their server counterparts, the instrumentation is implemented directly in the client so the only required step is to configure an `ObservationRegistry` on the client.
[[integration.observability.http-client.resttemplate]]
=== RestTemplate
Applications must configure an `ObservationRegistry` on `RestTemplate` instances to enable the instrumentation; without that, observations are "no-ops".
Spring Boot will auto-configure `RestTemplateBuilder` beans with the observation registry already set.
Instrumentation is using the `org.springframework.http.client.observation.ClientRequestObservationConvention` by default, backed by the `ClientRequestObservationContext`.
.Low cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`method` _(required)_|Name of HTTP request method or `"none"` if the request could not be created.
|`uri` _(required)_|URI template used for HTTP request, or `"none"` if none was provided. Only the path part of the URI is considered.
|`client.name` _(required)_|Client name derived from the request URI host.
|`status` _(required)_|HTTP response raw status code, or `"IO_ERROR"` in case of `IOException`, or `"CLIENT_ERROR"` if no response was received.
|`outcome` _(required)_|Outcome of the HTTP client exchange.
|`exception` _(required)_|Name of the exception thrown during the exchange, or `"none"` if no exception happened.
|===
.High cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`http.url` _(required)_|HTTP request URI.
|===
[[integration.observability.http-client.webclient]]
=== WebClient
Applications must configure an `ObservationRegistry` on the `WebClient` builder to enable the instrumentation; without that, observations are "no-ops".
Spring Boot will auto-configure `WebClient.Builder` beans with the observation registry already set.
Instrumentation is using the `org.springframework.web.reactive.function.client.ClientRequestObservationConvention` by default, backed by the `ClientRequestObservationContext`.
.Low cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`method` _(required)_|Name of HTTP request method or `"none"` if the request could not be created.
|`uri` _(required)_|URI template used for HTTP request, or `"none"` if none was provided. Only the path part of the URI is considered.
|`client.name` _(required)_|Client name derived from the request URI host.
|`status` _(required)_|HTTP response raw status code, or `"IO_ERROR"` in case of `IOException`, or `"CLIENT_ERROR"` if no response was received.
|`outcome` _(required)_|Outcome of the HTTP client exchange.
|`exception` _(required)_|Name of the exception thrown during the exchange, or `"none"` if no exception happened.
|===
.High cardinality Keys
[cols="a,a"]
|===
|Name | Description
|`http.url` _(required)_|HTTP request URI.
|===
@@ -1,520 +0,0 @@
[[rest-client-access]]
= REST Clients
The Spring Framework provides the following choices for making calls to REST endpoints:
* <<rest-webclient>> - non-blocking, reactive client w fluent API.
* <<rest-resttemplate>> - synchronous client with template method API.
* <<rest-http-interface>> - annotated interface with generated, dynamic proxy implementation.
[[rest-webclient]]
== `WebClient`
`WebClient` is a non-blocking, reactive client to perform HTTP requests. It was
introduced in 5.0 and offers an alternative to the `RestTemplate`, with support for
synchronous, asynchronous, and streaming scenarios.
`WebClient` supports the following:
* Non-blocking I/O.
* Reactive Streams back pressure.
* High concurrency with fewer hardware resources.
* Functional-style, fluent API that takes advantage of Java 8 lambdas.
* Synchronous and asynchronous interactions.
* Streaming up to or streaming down from a server.
See <<web-reactive.adoc#webflux-client, WebClient>> for more details.
[[rest-resttemplate]]
== `RestTemplate`
The `RestTemplate` provides a higher level API over HTTP client libraries. It makes it
easy to invoke REST endpoints in a single line. It exposes the following groups of
overloaded methods:
NOTE: `RestTemplate` is in maintenance mode, with only requests for minor
changes and bugs to be accepted. Please, consider using the
<<web-reactive.adoc#webflux-client, WebClient>> instead.
[[rest-overview-of-resttemplate-methods-tbl]]
.RestTemplate methods
[cols="1,3"]
|===
| Method group | Description
| `getForObject`
| Retrieves a representation via GET.
| `getForEntity`
| Retrieves a `ResponseEntity` (that is, status, headers, and body) by using GET.
| `headForHeaders`
| Retrieves all headers for a resource by using HEAD.
| `postForLocation`
| Creates a new resource by using POST and returns the `Location` header from the response.
| `postForObject`
| Creates a new resource by using POST and returns the representation from the response.
| `postForEntity`
| Creates a new resource by using POST and returns the representation from the response.
| `put`
| Creates or updates a resource by using PUT.
| `patchForObject`
| Updates a resource by using PATCH and returns the representation from the response.
Note that the JDK `HttpURLConnection` does not support `PATCH`, but Apache
HttpComponents and others do.
| `delete`
| Deletes the resources at the specified URI by using DELETE.
| `optionsForAllow`
| Retrieves allowed HTTP methods for a resource by using ALLOW.
| `exchange`
| More generalized (and less opinionated) version of the preceding methods that provides extra
flexibility when needed. It accepts a `RequestEntity` (including HTTP method, URL, headers,
and body as input) and returns a `ResponseEntity`.
These methods allow the use of `ParameterizedTypeReference` instead of `Class` to specify
a response type with generics.
| `execute`
| The most generalized way to perform a request, with full control over request
preparation and response extraction through callback interfaces.
|===
[[rest-resttemplate-create]]
=== Initialization
The default constructor uses `java.net.HttpURLConnection` to perform requests. You can
switch to a different HTTP library with an implementation of `ClientHttpRequestFactory`.
There is built-in support for the following:
* Apache HttpComponents
* Netty
* OkHttp
For example, to switch to Apache HttpComponents, you can use the following:
[source,java,indent=0,subs="verbatim,quotes"]
----
RestTemplate template = new RestTemplate(new HttpComponentsClientHttpRequestFactory());
----
Each `ClientHttpRequestFactory` exposes configuration options specific to the underlying
HTTP client library -- for example, for credentials, connection pooling, and other details.
TIP: Note that the `java.net` implementation for HTTP requests can raise an exception when
accessing the status of a response that represents an error (such as 401). If this is an
issue, switch to another HTTP client library.
NOTE: `RestTemplate` can be instrumented for observability, in order to produce metrics and traces.
See the <<integration.adoc#integration.observability.http-client.resttemplate,RestTemplate Observability support>> section.
[[rest-resttemplate-uri]]
==== URIs
Many of the `RestTemplate` methods accept a URI template and URI template variables,
either as a `String` variable argument, or as `Map<String,String>`.
The following example uses a `String` variable argument:
[source,java,indent=0,subs="verbatim,quotes"]
----
String result = restTemplate.getForObject(
"https://example.com/hotels/{hotel}/bookings/{booking}", String.class, "42", "21");
----
The following example uses a `Map<String, String>`:
[source,java,indent=0,subs="verbatim,quotes"]
----
Map<String, String> vars = Collections.singletonMap("hotel", "42");
String result = restTemplate.getForObject(
"https://example.com/hotels/{hotel}/rooms/{hotel}", String.class, vars);
----
Keep in mind URI templates are automatically encoded, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
restTemplate.getForObject("https://example.com/hotel list", String.class);
// Results in request to "https://example.com/hotel%20list"
----
You can use the `uriTemplateHandler` property of `RestTemplate` to customize how URIs
are encoded. Alternatively, you can prepare a `java.net.URI` and pass it into one of
the `RestTemplate` methods that accepts a `URI`.
For more details on working with and encoding URIs, see <<web.adoc#mvc-uri-building, URI Links>>.
[[rest-template-headers]]
==== Headers
You can use the `exchange()` methods to specify request headers, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
String uriTemplate = "https://example.com/hotels/{hotel}";
URI uri = UriComponentsBuilder.fromUriString(uriTemplate).build(42);
RequestEntity<Void> requestEntity = RequestEntity.get(uri)
.header("MyRequestHeader", "MyValue")
.build();
ResponseEntity<String> response = template.exchange(requestEntity, String.class);
String responseHeader = response.getHeaders().getFirst("MyResponseHeader");
String body = response.getBody();
----
You can obtain response headers through many `RestTemplate` method variants that return
`ResponseEntity`.
[[rest-template-body]]
=== Body
Objects passed into and returned from `RestTemplate` methods are converted to and from raw
content with the help of an `HttpMessageConverter`.
On a POST, an input object is serialized to the request body, as the following example shows:
----
URI location = template.postForLocation("https://example.com/people", person);
----
You need not explicitly set the Content-Type header of the request. In most cases,
you can find a compatible message converter based on the source `Object` type, and the chosen
message converter sets the content type accordingly. If necessary, you can use the
`exchange` methods to explicitly provide the `Content-Type` request header, and that, in
turn, influences what message converter is selected.
On a GET, the body of the response is deserialized to an output `Object`, as the following example shows:
----
Person person = restTemplate.getForObject("https://example.com/people/{id}", Person.class, 42);
----
The `Accept` header of the request does not need to be explicitly set. In most cases,
a compatible message converter can be found based on the expected response type, which
then helps to populate the `Accept` header. If necessary, you can use the `exchange`
methods to provide the `Accept` header explicitly.
By default, `RestTemplate` registers all built-in
<<rest-message-conversion, message converters>>, depending on classpath checks that help
to determine what optional conversion libraries are present. You can also set the message
converters to use explicitly.
[[rest-message-conversion]]
==== Message Conversion
[.small]#<<web-reactive.adoc#webflux-codecs, See equivalent in the Reactive stack>>#
The `spring-web` module contains the `HttpMessageConverter` contract for reading and
writing the body of HTTP requests and responses through `InputStream` and `OutputStream`.
`HttpMessageConverter` instances are used on the client side (for example, in the `RestTemplate`) and
on the server side (for example, in Spring MVC REST controllers).
Concrete implementations for the main media (MIME) types are provided in the framework
and are, by default, registered with the `RestTemplate` on the client side and with
`RequestMappingHandlerAdapter` on the server side (see
<<web.adoc#mvc-config-message-converters, Configuring Message Converters>>).
The implementations of `HttpMessageConverter` are described in the following sections.
For all converters, a default media type is used, but you can override it by setting the
`supportedMediaTypes` bean property. The following table describes each implementation:
[[rest-message-converters-tbl]]
.HttpMessageConverter Implementations
[cols="1,3"]
|===
| MessageConverter | Description
| `StringHttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write `String` instances from the HTTP
request and response. By default, this converter supports all text media types
(`text/{asterisk}`) and writes with a `Content-Type` of `text/plain`.
| `FormHttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write form data from the HTTP
request and response. By default, this converter reads and writes the
`application/x-www-form-urlencoded` media type. Form data is read from and written into a
`MultiValueMap<String, String>`. The converter can also write (but not read) multipart
data read from a `MultiValueMap<String, Object>`. By default, `multipart/form-data` is
supported. As of Spring Framework 5.2, additional multipart subtypes can be supported for
writing form data. Consult the javadoc for `FormHttpMessageConverter` for further details.
| `ByteArrayHttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write byte arrays from the
HTTP request and response. By default, this converter supports all media types (`{asterisk}/{asterisk}`)
and writes with a `Content-Type` of `application/octet-stream`. You can override this
by setting the `supportedMediaTypes` property and overriding `getContentType(byte[])`.
| `MarshallingHttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write XML by using Spring's
`Marshaller` and `Unmarshaller` abstractions from the `org.springframework.oxm` package.
This converter requires a `Marshaller` and `Unmarshaller` before it can be used. You can inject these
through constructor or bean properties. By default, this converter supports
`text/xml` and `application/xml`.
| `MappingJackson2HttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write JSON by using Jackson's
`ObjectMapper`. You can customize JSON mapping as needed through the use of Jackson's
provided annotations. When you need further control (for cases where custom JSON
serializers/deserializers need to be provided for specific types), you can inject a custom `ObjectMapper`
through the `ObjectMapper` property. By default, this
converter supports `application/json`.
| `MappingJackson2XmlHttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write XML by using
https://github.com/FasterXML/jackson-dataformat-xml[Jackson XML] extension's
`XmlMapper`. You can customize XML mapping as needed through the use of JAXB
or Jackson's provided annotations. When you need further control (for cases where custom XML
serializers/deserializers need to be provided for specific types), you can inject a custom `XmlMapper`
through the `ObjectMapper` property. By default, this
converter supports `application/xml`.
| `SourceHttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write
`javax.xml.transform.Source` from the HTTP request and response. Only `DOMSource`,
`SAXSource`, and `StreamSource` are supported. By default, this converter supports
`text/xml` and `application/xml`.
| `BufferedImageHttpMessageConverter`
| An `HttpMessageConverter` implementation that can read and write
`java.awt.image.BufferedImage` from the HTTP request and response. This converter reads
and writes the media type supported by the Java I/O API.
|===
[[rest-template-jsonview]]
=== Jackson JSON Views
You can specify a https://www.baeldung.com/jackson-json-view-annotation[Jackson JSON View]
to serialize only a subset of the object properties, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
MappingJacksonValue value = new MappingJacksonValue(new User("eric", "7!jd#h23"));
value.setSerializationView(User.WithoutPasswordView.class);
RequestEntity<MappingJacksonValue> requestEntity =
RequestEntity.post(new URI("https://example.com/user")).body(value);
ResponseEntity<String> response = template.exchange(requestEntity, String.class);
----
[[rest-template-multipart]]
=== Multipart
To send multipart data, you need to provide a `MultiValueMap<String, Object>` whose values
may be an `Object` for part content, a `Resource` for a file part, or an `HttpEntity` for
part content with headers. For example:
[source,java,indent=0,subs="verbatim,quotes"]
----
MultiValueMap<String, Object> parts = new LinkedMultiValueMap<>();
parts.add("fieldPart", "fieldValue");
parts.add("filePart", new FileSystemResource("...logo.png"));
parts.add("jsonPart", new Person("Jason"));
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_XML);
parts.add("xmlPart", new HttpEntity<>(myBean, headers));
----
In most cases, you do not have to specify the `Content-Type` for each part. The content
type is determined automatically based on the `HttpMessageConverter` chosen to serialize
it or, in the case of a `Resource` based on the file extension. If necessary, you can
explicitly provide the `MediaType` with an `HttpEntity` wrapper.
Once the `MultiValueMap` is ready, you can pass it to the `RestTemplate`, as show below:
[source,java,indent=0,subs="verbatim,quotes"]
----
MultiValueMap<String, Object> parts = ...;
template.postForObject("https://example.com/upload", parts, Void.class);
----
If the `MultiValueMap` contains at least one non-`String` value, the `Content-Type` is set
to `multipart/form-data` by the `FormHttpMessageConverter`. If the `MultiValueMap` has
`String` values the `Content-Type` is defaulted to `application/x-www-form-urlencoded`.
If necessary the `Content-Type` may also be set explicitly.
[[rest-http-interface]]
== HTTP Interface
The Spring Framework lets you define an HTTP service as a Java interface with annotated
methods for HTTP exchanges. You can then generate a proxy that implements this interface
and performs the exchanges. This helps to simplify HTTP remote access which often
involves a facade that wraps the details of using the underlying HTTP client.
One, declare an interface with `@HttpExchange` methods:
[source,java,indent=0,subs="verbatim,quotes"]
----
interface RepositoryService {
@GetExchange("/repos/{owner}/{repo}")
Repository getRepository(@PathVariable String owner, @PathVariable String repo);
// more HTTP exchange methods...
}
----
Two, create a proxy that will perform the declared HTTP exchanges:
[source,java,indent=0,subs="verbatim,quotes"]
----
WebClient client = WebClient.builder().baseUrl("https://api.github.com/").build();
HttpServiceProxyFactory factory = HttpServiceProxyFactory.builder(WebClientAdapter.forClient(client)).build();
RepositoryService service = factory.createClient(RepositoryService.class);
----
`@HttpExchange` is supported at the type level where it applies to all methods:
[source,java,indent=0,subs="verbatim,quotes"]
----
@HttpExchange(url = "/repos/{owner}/{repo}", accept = "application/vnd.github.v3+json")
interface RepositoryService {
@GetExchange
Repository getRepository(@PathVariable String owner, @PathVariable String repo);
@PatchExchange(contentType = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
void updateRepository(@PathVariable String owner, @PathVariable String repo,
@RequestParam String name, @RequestParam String description, @RequestParam String homepage);
}
----
[[rest-http-interface-method-parameters]]
=== Method Parameters
Annotated, HTTP exchange methods support flexible method signatures with the following
method parameters:
[cols="1,2", options="header"]
|===
| Method argument | Description
| `URI`
| Dynamically set the URL for the request, overriding the annotation's `url` attribute.
| `HttpMethod`
| Dynamically set the HTTP method for the request, overriding the annotation's `method` attribute
| `@RequestHeader`
| Add a request header or multiple headers. The argument may be a `Map<String, ?>` or
`MultiValueMap<String, ?>` with multiple headers, a `Collection<?>` of values, or an
individual value. Type conversion is supported for non-String values.
| `@PathVariable`
| Add a variable for expand a placeholder in the request URL. The argument may be a
`Map<String, ?>` with multiple variables, or an individual value. Type conversion
is supported for non-String values.
| `@RequestBody`
| Provide the body of the request either as an Object to be serialized, or a
Reactive Streams `Publisher` such as `Mono`, `Flux`, or any other async type supported
through the configured `ReactiveAdapterRegistry`.
| `@RequestParam`
| Add a request parameter or multiple parameters. The argument may be a `Map<String, ?>`
or `MultiValueMap<String, ?>` with multiple parameters, a `Collection<?>` of values, or
an individual value. Type conversion is supported for non-String values.
When `"content-type"` is set to `"application/x-www-form-urlencoded"`, request
parameters are encoded in the request body. Otherwise, they are added as URL query
parameters.
| `@RequestPart`
| Add a request part, which may be a String (form field), `Resource` (file part),
Object (entity to be encoded, e.g. as JSON), `HttpEntity` (part content and headers),
a Spring `Part`, or Reactive Streams `Publisher` of any of the above.
| `@CookieValue`
| Add a cookie or multiple cookies. The argument may be a `Map<String, ?>` or
`MultiValueMap<String, ?>` with multiple cookies, a `Collection<?>` of values, or an
individual value. Type conversion is supported for non-String values.
|===
[[rest-http-interface-return-values]]
=== Return Values
Annotated, HTTP exchange methods support the following return values:
[cols="1,2", options="header"]
|===
| Method return value | Description
| `void`, `Mono<Void>`
| Perform the given request, and release the response content, if any.
| `HttpHeaders`, `Mono<HttpHeaders>`
| Perform the given request, release the response content, if any, and return the
response headers.
| `<T>`, `Mono<T>`
| Perform the given request and decode the response content to the declared return type.
| `<T>`, `Flux<T>`
| Perform the given request and decode the response content to a stream of the declared
element type.
| `ResponseEntity<Void>`, `Mono<ResponseEntity<Void>>`
| Perform the given request, and release the response content, if any, and return a
`ResponseEntity` with the status and headers.
| `ResponseEntity<T>`, `Mono<ResponseEntity<T>>`
| Perform the given request, decode the response content to the declared return type, and
return a `ResponseEntity` with the status, headers, and the decoded body.
| `Mono<ResponseEntity<Flux<T>>`
| Perform the given request, decode the response content to a stream of the declared
element type, and return a `ResponseEntity` with the status, headers, and the decoded
response body stream.
|===
TIP: You can also use any other async or reactive types registered in the
`ReactiveAdapterRegistry`.
[[rest-http-interface-exceptions]]
=== Exception Handling
By default, `WebClient` raises `WebClientResponseException` for 4xx and 5xx HTTP status
codes. To customize this, you can register a response status handler that applies to all
responses performed through the client:
[source,java,indent=0,subs="verbatim,quotes"]
----
WebClient webClient = WebClient.builder()
.defaultStatusHandler(HttpStatusCode::isError, resp -> ...)
.build();
WebClientAdapter clientAdapter = WebClientAdapter.forClient(webClient);
HttpServiceProxyFactory factory = HttpServiceProxyFactory
.builder(clientAdapter).build();
----
For more details and options, such as suppressing error status codes, see the Javadoc of
`defaultStatusHandler` in `WebClient.Builder`.
@@ -1,970 +0,0 @@
[[scheduling]]
= Task Execution and Scheduling
The Spring Framework provides abstractions for the asynchronous execution and scheduling of
tasks with the `TaskExecutor` and `TaskScheduler` interfaces, respectively. Spring also
features implementations of those interfaces that support thread pools or delegation to
CommonJ within an application server environment. Ultimately, the use of these
implementations behind the common interfaces abstracts away the differences between Java
SE 5, Java SE 6, and Jakarta EE environments.
Spring also features integration classes to support scheduling with the `Timer`
(part of the JDK since 1.3) and the https://www.quartz-scheduler.org/[Quartz Scheduler].
You can set up both of those schedulers by using a `FactoryBean` with optional references to
`Timer` or `Trigger` instances, respectively. Furthermore, a convenience class for both
the Quartz Scheduler and the `Timer` is available that lets you invoke a method of
an existing target object (analogous to the normal `MethodInvokingFactoryBean`
operation).
[[scheduling-task-executor]]
== The Spring `TaskExecutor` Abstraction
Executors are the JDK name for the concept of thread pools. The "`executor`" naming is
due to the fact that there is no guarantee that the underlying implementation is
actually a pool. An executor may be single-threaded or even synchronous. Spring's
abstraction hides implementation details between the Java SE and Jakarta EE environments.
Spring's `TaskExecutor` interface is identical to the `java.util.concurrent.Executor`
interface. In fact, originally, its primary reason for existence was to abstract away
the need for Java 5 when using thread pools. The interface has a single method
(`execute(Runnable task)`) that accepts a task for execution based on the semantics
and configuration of the thread pool.
The `TaskExecutor` was originally created to give other Spring components an abstraction
for thread pooling where needed. Components such as the `ApplicationEventMulticaster`,
JMS's `AbstractMessageListenerContainer`, and Quartz integration all use the
`TaskExecutor` abstraction to pool threads. However, if your beans need thread pooling
behavior, you can also use this abstraction for your own needs.
[[scheduling-task-executor-types]]
=== `TaskExecutor` Types
Spring includes a number of pre-built implementations of `TaskExecutor`.
In all likelihood, you should never need to implement your own.
The variants that Spring provides are as follows:
* `SyncTaskExecutor`:
This implementation does not run invocations asynchronously. Instead, each
invocation takes place in the calling thread. It is primarily used in situations
where multi-threading is not necessary, such as in simple test cases.
* `SimpleAsyncTaskExecutor`:
This implementation does not reuse any threads. Rather, it starts up a new thread
for each invocation. However, it does support a concurrency limit that blocks
any invocations that are over the limit until a slot has been freed up. If you
are looking for true pooling, see `ThreadPoolTaskExecutor`, later in this list.
* `ConcurrentTaskExecutor`:
This implementation is an adapter for a `java.util.concurrent.Executor` instance.
There is an alternative (`ThreadPoolTaskExecutor`) that exposes the `Executor`
configuration parameters as bean properties. There is rarely a need to use
`ConcurrentTaskExecutor` directly. However, if the `ThreadPoolTaskExecutor` is not
flexible enough for your needs, `ConcurrentTaskExecutor` is an alternative.
* `ThreadPoolTaskExecutor`:
This implementation is most commonly used. It exposes bean properties for
configuring a `java.util.concurrent.ThreadPoolExecutor` and wraps it in a `TaskExecutor`.
If you need to adapt to a different kind of `java.util.concurrent.Executor`, we
recommend that you use a `ConcurrentTaskExecutor` instead.
* `DefaultManagedTaskExecutor`:
This implementation uses a JNDI-obtained `ManagedExecutorService` in a JSR-236
compatible runtime environment (such as a Jakarta EE application server),
replacing a CommonJ WorkManager for that purpose.
[[scheduling-task-executor-usage]]
=== Using a `TaskExecutor`
Spring's `TaskExecutor` implementations are used as simple JavaBeans. In the following example,
we define a bean that uses the `ThreadPoolTaskExecutor` to asynchronously print
out a set of messages:
[source,java,indent=0,subs="verbatim,quotes"]
----
import org.springframework.core.task.TaskExecutor;
public class TaskExecutorExample {
private class MessagePrinterTask implements Runnable {
private String message;
public MessagePrinterTask(String message) {
this.message = message;
}
public void run() {
System.out.println(message);
}
}
private TaskExecutor taskExecutor;
public TaskExecutorExample(TaskExecutor taskExecutor) {
this.taskExecutor = taskExecutor;
}
public void printMessages() {
for(int i = 0; i < 25; i++) {
taskExecutor.execute(new MessagePrinterTask("Message" + i));
}
}
}
----
As you can see, rather than retrieving a thread from the pool and executing it yourself,
you add your `Runnable` to the queue. Then the `TaskExecutor` uses its internal rules to
decide when the task gets run.
To configure the rules that the `TaskExecutor` uses, we expose simple bean properties:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="taskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
<property name="corePoolSize" value="5"/>
<property name="maxPoolSize" value="10"/>
<property name="queueCapacity" value="25"/>
</bean>
<bean id="taskExecutorExample" class="TaskExecutorExample">
<constructor-arg ref="taskExecutor"/>
</bean>
----
[[scheduling-task-scheduler]]
== The Spring `TaskScheduler` Abstraction
In addition to the `TaskExecutor` abstraction, Spring has a `TaskScheduler` SPI with a
variety of methods for scheduling tasks to run at some point in the future. The following
listing shows the `TaskScheduler` interface definition:
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface TaskScheduler {
Clock getClock();
ScheduledFuture schedule(Runnable task, Trigger trigger);
ScheduledFuture schedule(Runnable task, Instant startTime);
ScheduledFuture scheduleAtFixedRate(Runnable task, Instant startTime, Duration period);
ScheduledFuture scheduleAtFixedRate(Runnable task, Duration period);
ScheduledFuture scheduleWithFixedDelay(Runnable task, Instant startTime, Duration delay);
ScheduledFuture scheduleWithFixedDelay(Runnable task, Duration delay);
----
The simplest method is the one named `schedule` that takes only a `Runnable` and an `Instant`.
That causes the task to run once after the specified time. All of the other methods
are capable of scheduling tasks to run repeatedly. The fixed-rate and fixed-delay
methods are for simple, periodic execution, but the method that accepts a `Trigger` is
much more flexible.
[[scheduling-trigger-interface]]
=== `Trigger` Interface
The `Trigger` interface is essentially inspired by JSR-236. The basic idea of the
`Trigger` is that execution times may be determined based on past execution outcomes or
even arbitrary conditions. If these determinations take into account the outcome of the
preceding execution, that information is available within a `TriggerContext`. The
`Trigger` interface itself is quite simple, as the following listing shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface Trigger {
Instant nextExecution(TriggerContext triggerContext);
}
----
The `TriggerContext` is the most important part. It encapsulates all of
the relevant data and is open for extension in the future, if necessary. The
`TriggerContext` is an interface (a `SimpleTriggerContext` implementation is used by
default). The following listing shows the available methods for `Trigger` implementations.
[source,java,indent=0,subs="verbatim,quotes"]
----
public interface TriggerContext {
Clock getClock();
Instant lastScheduledExecution();
Instant lastActualExecution();
Instant lastCompletion();
}
----
[[scheduling-trigger-implementations]]
=== `Trigger` Implementations
Spring provides two implementations of the `Trigger` interface. The most interesting one
is the `CronTrigger`. It enables the scheduling of tasks based on
<<scheduling-cron-expression,cron expressions>>.
For example, the following task is scheduled to run 15 minutes past each hour but only
during the 9-to-5 "business hours" on weekdays:
[source,java,indent=0]
[subs="verbatim"]
----
scheduler.schedule(task, new CronTrigger("0 15 9-17 * * MON-FRI"));
----
The other implementation is a `PeriodicTrigger` that accepts a fixed
period, an optional initial delay value, and a boolean to indicate whether the period
should be interpreted as a fixed-rate or a fixed-delay. Since the `TaskScheduler`
interface already defines methods for scheduling tasks at a fixed rate or with a
fixed delay, those methods should be used directly whenever possible. The value of the
`PeriodicTrigger` implementation is that you can use it within components that rely on
the `Trigger` abstraction. For example, it may be convenient to allow periodic triggers,
cron-based triggers, and even custom trigger implementations to be used interchangeably.
Such a component could take advantage of dependency injection so that you can configure such `Triggers`
externally and, therefore, easily modify or extend them.
[[scheduling-task-scheduler-implementations]]
=== `TaskScheduler` implementations
As with Spring's `TaskExecutor` abstraction, the primary benefit of the `TaskScheduler`
arrangement is that an application's scheduling needs are decoupled from the deployment
environment. This abstraction level is particularly relevant when deploying to an
application server environment where threads should not be created directly by the
application itself. For such scenarios, Spring provides a `TimerManagerTaskScheduler`
that delegates to a CommonJ `TimerManager` on WebLogic or WebSphere as well as a more recent
`DefaultManagedTaskScheduler` that delegates to a JSR-236 `ManagedScheduledExecutorService`
in a Jakarta EE environment. Both are typically configured with a JNDI lookup.
Whenever external thread management is not a requirement, a simpler alternative is
a local `ScheduledExecutorService` setup within the application, which can be adapted
through Spring's `ConcurrentTaskScheduler`. As a convenience, Spring also provides a
`ThreadPoolTaskScheduler`, which internally delegates to a `ScheduledExecutorService`
to provide common bean-style configuration along the lines of `ThreadPoolTaskExecutor`.
These variants work perfectly fine for locally embedded thread pool setups in lenient
application server environments, as well -- in particular on Tomcat and Jetty.
[[scheduling-annotation-support]]
== Annotation Support for Scheduling and Asynchronous Execution
Spring provides annotation support for both task scheduling and asynchronous method
execution.
[[scheduling-enable-annotation-support]]
=== Enable Scheduling Annotations
To enable support for `@Scheduled` and `@Async` annotations, you can add `@EnableScheduling` and
`@EnableAsync` to one of your `@Configuration` classes, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
@Configuration
@EnableAsync
@EnableScheduling
public class AppConfig {
}
----
You can pick and choose the relevant annotations for your application. For example,
if you need only support for `@Scheduled`, you can omit `@EnableAsync`. For more
fine-grained control, you can additionally implement the `SchedulingConfigurer`
interface, the `AsyncConfigurer` interface, or both. See the
{api-spring-framework}/scheduling/annotation/SchedulingConfigurer.html[`SchedulingConfigurer`]
and {api-spring-framework}/scheduling/annotation/AsyncConfigurer.html[`AsyncConfigurer`]
javadoc for full details.
If you prefer XML configuration, you can use the `<task:annotation-driven>` element,
as the following example shows:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<task:annotation-driven executor="myExecutor" scheduler="myScheduler"/>
<task:executor id="myExecutor" pool-size="5"/>
<task:scheduler id="myScheduler" pool-size="10"/>
----
Note that, with the preceding XML, an executor reference is provided for handling those
tasks that correspond to methods with the `@Async` annotation, and the scheduler
reference is provided for managing those methods annotated with `@Scheduled`.
NOTE: The default advice mode for processing `@Async` annotations is `proxy` which allows
for interception of calls through the proxy only. Local calls within the same class
cannot get intercepted that way. For a more advanced mode of interception, consider
switching to `aspectj` mode in combination with compile-time or load-time weaving.
[[scheduling-annotation-support-scheduled]]
=== The `@Scheduled` annotation
You can add the `@Scheduled` annotation to a method, along with trigger metadata. For
example, the following method is invoked every five seconds (5000 milliseconds) with a
fixed delay, meaning that the period is measured from the completion time of each
preceding invocation.
[source,java,indent=0,subs="verbatim,quotes"]
----
@Scheduled(fixedDelay = 5000)
public void doSomething() {
// something that should run periodically
}
----
[NOTE]
====
By default, milliseconds will be used as the time unit for fixed delay, fixed rate, and
initial delay values. If you would like to use a different time unit such as seconds or
minutes, you can configure this via the `timeUnit` attribute in `@Scheduled`.
For example, the previous example can also be written as follows.
[source,java,indent=0,subs="verbatim,quotes"]
----
@Scheduled(fixedDelay = 5, timeUnit = TimeUnit.SECONDS)
public void doSomething() {
// something that should run periodically
}
----
====
If you need a fixed-rate execution, you can use the `fixedRate` attribute within the
annotation. The following method is invoked every five seconds (measured between the
successive start times of each invocation).
[source,java,indent=0,subs="verbatim,quotes"]
----
@Scheduled(fixedRate = 5, timeUnit = TimeUnit.SECONDS)
public void doSomething() {
// something that should run periodically
}
----
For fixed-delay and fixed-rate tasks, you can specify an initial delay by indicating the
amount of time to wait before the first execution of the method, as the following
`fixedRate` example shows.
[source,java,indent=0,subs="verbatim,quotes"]
----
@Scheduled(initialDelay = 1000, fixedRate = 5000)
public void doSomething() {
// something that should run periodically
}
----
If simple periodic scheduling is not expressive enough, you can provide a
<<scheduling-cron-expression,cron expression>>.
The following example runs only on weekdays:
[source,java,indent=0]
[subs="verbatim"]
----
@Scheduled(cron="*/5 * * * * MON-FRI")
public void doSomething() {
// something that should run on weekdays only
}
----
TIP: You can also use the `zone` attribute to specify the time zone in which the cron
expression is resolved.
Notice that the methods to be scheduled must have void returns and must not accept any
arguments. If the method needs to interact with other objects from the application
context, those would typically have been provided through dependency injection.
[NOTE]
====
As of Spring Framework 4.3, `@Scheduled` methods are supported on beans of any scope.
Make sure that you are not initializing multiple instances of the same `@Scheduled`
annotation class at runtime, unless you do want to schedule callbacks to each such
instance. Related to this, make sure that you do not use `@Configurable` on bean
classes that are annotated with `@Scheduled` and registered as regular Spring beans
with the container. Otherwise, you would get double initialization (once through the
container and once through the `@Configurable` aspect), with the consequence of each
`@Scheduled` method being invoked twice.
====
[[scheduling-annotation-support-async]]
=== The `@Async` annotation
You can provide the `@Async` annotation on a method so that invocation of that method
occurs asynchronously. In other words, the caller returns immediately upon
invocation, while the actual execution of the method occurs in a task that has been
submitted to a Spring `TaskExecutor`. In the simplest case, you can apply the annotation
to a method that returns `void`, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
@Async
void doSomething() {
// this will be run asynchronously
}
----
Unlike the methods annotated with the `@Scheduled` annotation, these methods can expect
arguments, because they are invoked in the "`normal`" way by callers at runtime rather
than from a scheduled task being managed by the container. For example, the following code is
a legitimate application of the `@Async` annotation:
[source,java,indent=0,subs="verbatim,quotes"]
----
@Async
void doSomething(String s) {
// this will be run asynchronously
}
----
Even methods that return a value can be invoked asynchronously. However, such methods
are required to have a `Future`-typed return value. This still provides the benefit of
asynchronous execution so that the caller can perform other tasks prior to calling
`get()` on that `Future`. The following example shows how to use `@Async` on a method
that returns a value:
[source,java,indent=0,subs="verbatim,quotes"]
----
@Async
Future<String> returnSomething(int i) {
// this will be run asynchronously
}
----
TIP: `@Async` methods may not only declare a regular `java.util.concurrent.Future` return type
but also Spring's `org.springframework.util.concurrent.ListenableFuture` or, as of Spring
4.2, JDK 8's `java.util.concurrent.CompletableFuture`, for richer interaction with the
asynchronous task and for immediate composition with further processing steps.
You can not use `@Async` in conjunction with lifecycle callbacks such as
`@PostConstruct`. To asynchronously initialize Spring beans, you currently have to use
a separate initializing Spring bean that then invokes the `@Async` annotated method on the
target, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
public class SampleBeanImpl implements SampleBean {
@Async
void doSomething() {
// ...
}
}
public class SampleBeanInitializer {
private final SampleBean bean;
public SampleBeanInitializer(SampleBean bean) {
this.bean = bean;
}
@PostConstruct
public void initialize() {
bean.doSomething();
}
}
----
NOTE: There is no direct XML equivalent for `@Async`, since such methods should be designed
for asynchronous execution in the first place, not externally re-declared to be asynchronous.
However, you can manually set up Spring's `AsyncExecutionInterceptor` with Spring AOP,
in combination with a custom pointcut.
[[scheduling-annotation-support-qualification]]
=== Executor Qualification with `@Async`
By default, when specifying `@Async` on a method, the executor that is used is the
one <<scheduling-enable-annotation-support, configured when enabling async support>>,
i.e. the "`annotation-driven`" element if you are using XML or your `AsyncConfigurer`
implementation, if any. However, you can use the `value` attribute of the `@Async`
annotation when you need to indicate that an executor other than the default should be
used when executing a given method. The following example shows how to do so:
[source,java,indent=0,subs="verbatim,quotes"]
----
@Async("otherExecutor")
void doSomething(String s) {
// this will be run asynchronously by "otherExecutor"
}
----
In this case, `"otherExecutor"` can be the name of any `Executor` bean in the Spring
container, or it may be the name of a qualifier associated with any `Executor` (for example, as
specified with the `<qualifier>` element or Spring's `@Qualifier` annotation).
[[scheduling-annotation-support-exception]]
=== Exception Management with `@Async`
When an `@Async` method has a `Future`-typed return value, it is easy to manage
an exception that was thrown during the method execution, as this exception is
thrown when calling `get` on the `Future` result. With a `void` return type,
however, the exception is uncaught and cannot be transmitted. You can provide an
`AsyncUncaughtExceptionHandler` to handle such exceptions. The following example shows
how to do so:
[source,java,indent=0,subs="verbatim,quotes"]
----
public class MyAsyncUncaughtExceptionHandler implements AsyncUncaughtExceptionHandler {
@Override
public void handleUncaughtException(Throwable ex, Method method, Object... params) {
// handle exception
}
}
----
By default, the exception is merely logged. You can define a custom `AsyncUncaughtExceptionHandler`
by using `AsyncConfigurer` or the `<task:annotation-driven/>` XML element.
[[scheduling-task-namespace]]
== The `task` Namespace
As of version 3.0, Spring includes an XML namespace for configuring `TaskExecutor` and
`TaskScheduler` instances. It also provides a convenient way to configure tasks to be
scheduled with a trigger.
[[scheduling-task-namespace-scheduler]]
=== The 'scheduler' Element
The following element creates a `ThreadPoolTaskScheduler` instance with the
specified thread pool size:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<task:scheduler id="scheduler" pool-size="10"/>
----
The value provided for the `id` attribute is used as the prefix for thread names
within the pool. The `scheduler` element is relatively straightforward. If you do not
provide a `pool-size` attribute, the default thread pool has only a single thread.
There are no other configuration options for the scheduler.
[[scheduling-task-namespace-executor]]
=== The `executor` Element
The following creates a `ThreadPoolTaskExecutor` instance:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<task:executor id="executor" pool-size="10"/>
----
As with the scheduler shown in the <<scheduling-task-namespace-scheduler, previous section>>,
the value provided for the `id` attribute is used as the prefix for thread names within
the pool. As far as the pool size is concerned, the `executor` element supports more
configuration options than the `scheduler` element. For one thing, the thread pool for
a `ThreadPoolTaskExecutor` is itself more configurable. Rather than only a single size,
an executor's thread pool can have different values for the core and the max size.
If you provide a single value, the executor has a fixed-size thread pool (the core and
max sizes are the same). However, the `executor` element's `pool-size` attribute also
accepts a range in the form of `min-max`. The following example sets a minimum value of
`5` and a maximum value of `25`:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<task:executor
id="executorWithPoolSizeRange"
pool-size="5-25"
queue-capacity="100"/>
----
In the preceding configuration, a `queue-capacity` value has also been provided.
The configuration of the thread pool should also be considered in light of the
executor's queue capacity. For the full description of the relationship between pool
size and queue capacity, see the documentation for
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html[`ThreadPoolExecutor`].
The main idea is that, when a task is submitted, the executor first tries to use a
free thread if the number of active threads is currently less than the core size.
If the core size has been reached, the task is added to the queue, as long as its
capacity has not yet been reached. Only then, if the queue's capacity has been
reached, does the executor create a new thread beyond the core size. If the max size
has also been reached, then the executor rejects the task.
By default, the queue is unbounded, but this is rarely the desired configuration,
because it can lead to `OutOfMemoryErrors` if enough tasks are added to that queue while
all pool threads are busy. Furthermore, if the queue is unbounded, the max size has
no effect at all. Since the executor always tries the queue before creating a new
thread beyond the core size, a queue must have a finite capacity for the thread pool to
grow beyond the core size (this is why a fixed-size pool is the only sensible case
when using an unbounded queue).
Consider the case, as mentioned above, when a task is rejected. By default, when a
task is rejected, a thread pool executor throws a `TaskRejectedException`. However,
the rejection policy is actually configurable. The exception is thrown when using
the default rejection policy, which is the `AbortPolicy` implementation.
For applications where some tasks can be skipped under heavy load, you can instead
configure either `DiscardPolicy` or `DiscardOldestPolicy`. Another option that works
well for applications that need to throttle the submitted tasks under heavy load is
the `CallerRunsPolicy`. Instead of throwing an exception or discarding tasks,
that policy forces the thread that is calling the submit method to run the task itself.
The idea is that such a caller is busy while running that task and not able to submit
other tasks immediately. Therefore, it provides a simple way to throttle the incoming
load while maintaining the limits of the thread pool and queue. Typically, this allows
the executor to "`catch up`" on the tasks it is handling and thereby frees up some
capacity on the queue, in the pool, or both. You can choose any of these options from an
enumeration of values available for the `rejection-policy` attribute on the `executor`
element.
The following example shows an `executor` element with a number of attributes to specify
various behaviors:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<task:executor
id="executorWithCallerRunsPolicy"
pool-size="5-25"
queue-capacity="100"
rejection-policy="CALLER_RUNS"/>
----
Finally, the `keep-alive` setting determines the time limit (in seconds) for which threads
may remain idle before being stopped. If there are more than the core number of threads
currently in the pool, after waiting this amount of time without processing a task, excess
threads get stopped. A time value of zero causes excess threads to stop
immediately after executing a task without remaining follow-up work in the task queue.
The following example sets the `keep-alive` value to two minutes:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<task:executor
id="executorWithKeepAlive"
pool-size="5-25"
keep-alive="120"/>
----
[[scheduling-task-namespace-scheduled-tasks]]
=== The 'scheduled-tasks' Element
The most powerful feature of Spring's task namespace is the support for configuring
tasks to be scheduled within a Spring Application Context. This follows an approach
similar to other "`method-invokers`" in Spring, such as that provided by the JMS namespace
for configuring message-driven POJOs. Basically, a `ref` attribute can point to any
Spring-managed object, and the `method` attribute provides the name of a method to be
invoked on that object. The following listing shows a simple example:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<task:scheduled-tasks scheduler="myScheduler">
<task:scheduled ref="beanA" method="methodA" fixed-delay="5000"/>
</task:scheduled-tasks>
<task:scheduler id="myScheduler" pool-size="10"/>
----
The scheduler is referenced by the outer element, and each individual
task includes the configuration of its trigger metadata. In the preceding example, that
metadata defines a periodic trigger with a fixed delay indicating the number of
milliseconds to wait after each task execution has completed. Another option is
`fixed-rate`, indicating how often the method should be run regardless of how long
any previous execution takes. Additionally, for both `fixed-delay` and `fixed-rate` tasks, you can specify an
'initial-delay' parameter, indicating the number of milliseconds to wait
before the first execution of the method. For more control, you can instead provide a `cron` attribute
to provide a <<scheduling-cron-expression,cron expression>>.
The following example shows these other options:
[source,xml,indent=0]
[subs="verbatim"]
----
<task:scheduled-tasks scheduler="myScheduler">
<task:scheduled ref="beanA" method="methodA" fixed-delay="5000" initial-delay="1000"/>
<task:scheduled ref="beanB" method="methodB" fixed-rate="5000"/>
<task:scheduled ref="beanC" method="methodC" cron="*/5 * * * * MON-FRI"/>
</task:scheduled-tasks>
<task:scheduler id="myScheduler" pool-size="10"/>
----
[[scheduling-cron-expression]]
== Cron Expressions
All Spring cron expressions have to conform to the same format, whether you are using them in
<<scheduling-annotation-support-scheduled,`@Scheduled` annotations>>,
<<scheduling-task-namespace-scheduled-tasks,`task:scheduled-tasks` elements>>,
or someplace else.
A well-formed cron expression, such as `* * * * * *`, consists of six space-separated time and date
fields, each with its own range of valid values:
....
┌───────────── second (0-59)
│ ┌───────────── minute (0 - 59)
│ │ ┌───────────── hour (0 - 23)
│ │ │ ┌───────────── day of the month (1 - 31)
│ │ │ │ ┌───────────── month (1 - 12) (or JAN-DEC)
│ │ │ │ │ ┌───────────── day of the week (0 - 7)
│ │ │ │ │ │ (0 or 7 is Sunday, or MON-SUN)
│ │ │ │ │ │
* * * * * *
....
There are some rules that apply:
* A field may be an asterisk (`*`), which always stands for "`first-last`".
For the day-of-the-month or day-of-the-week fields, a question mark (`?`) may be used instead of an
asterisk.
* Commas (`,`) are used to separate items of a list.
* Two numbers separated with a hyphen (`-`) express a range of numbers.
The specified range is inclusive.
* Following a range (or `*`) with `/` specifies the interval of the number's value through the range.
* English names can also be used for the month and day-of-week fields.
Use the first three letters of the particular day or month (case does not matter).
* The day-of-month and day-of-week fields can contain an `L` character, which has a different meaning.
** In the day-of-month field, `L` stands for _the last day of the month_.
If followed by a negative offset (that is, `L-n`), it means _``n``th-to-last day of the month_.
** In the day-of-week field, `L` stands for _the last day of the week_.
If prefixed by a number or three-letter name (`dL` or `DDDL`), it means _the last day of week (`d`
or `DDD`) in the month_.
* The day-of-month field can be `nW`, which stands for _the nearest weekday to day of the month ``n``_.
If `n` falls on Saturday, this yields the Friday before it.
If `n` falls on Sunday, this yields the Monday after, which also happens if `n` is `1` and falls on
a Saturday (that is: `1W` stands for _the first weekday of the month_).
* If the day-of-month field is `LW`, it means _the last weekday of the month_.
* The day-of-week field can be `d#n` (or `DDD#n`), which stands for _the ``n``th day of week `d`
(or ``DDD``) in the month_.
Here are some examples:
|===
| Cron Expression | Meaning
|`0 0 * * * *` | top of every hour of every day
|`*/10 * * * * *` | every ten seconds
| `0 0 8-10 * * *` | 8, 9 and 10 o'clock of every day
| `0 0 6,19 * * *` | 6:00 AM and 7:00 PM every day
| `0 0/30 8-10 * * *` | 8:00, 8:30, 9:00, 9:30, 10:00 and 10:30 every day
| `0 0 9-17 * * MON-FRI`| on the hour nine-to-five weekdays
| `0 0 0 25 DEC ?` | every Christmas Day at midnight
| `0 0 0 L * *` | last day of the month at midnight
| `0 0 0 L-3 * *` | third-to-last day of the month at midnight
| `0 0 0 * * 5L` | last Friday of the month at midnight
| `0 0 0 * * THUL` | last Thursday of the month at midnight
| `0 0 0 1W * *` | first weekday of the month at midnight
| `0 0 0 LW * *` | last weekday of the month at midnight
| `0 0 0 ? * 5#2` | the second Friday in the month at midnight
| `0 0 0 ? * MON#1` | the first Monday in the month at midnight
|===
=== Macros
Expressions such as `0 0 * * * *` are hard for humans to parse and are, therefore, hard to fix in case of bugs.
To improve readability, Spring supports the following macros, which represent commonly used sequences.
You can use these macros instead of the six-digit value, thus: `@Scheduled(cron = "@hourly")`.
|===
|Macro | Meaning
| `@yearly` (or `@annually`) | once a year (`0 0 0 1 1 *`)
| `@monthly` | once a month (`0 0 0 1 * *`)
| `@weekly` | once a week (`0 0 0 * * 0`)
| `@daily` (or `@midnight`) | once a day (`0 0 0 * * *`), or
| `@hourly` | once an hour, (`0 0 * * * *`)
|===
[[scheduling-quartz]]
== Using the Quartz Scheduler
Quartz uses `Trigger`, `Job`, and `JobDetail` objects to realize scheduling of all kinds
of jobs. For the basic concepts behind Quartz, see the
https://www.quartz-scheduler.org/[Quartz Web site]. For convenience purposes, Spring
offers a couple of classes that simplify using Quartz within Spring-based applications.
[[scheduling-quartz-jobdetail]]
=== Using the `JobDetailFactoryBean`
Quartz `JobDetail` objects contain all the information needed to run a job. Spring provides a
`JobDetailFactoryBean`, which provides bean-style properties for XML configuration purposes.
Consider the following example:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean name="exampleJob" class="org.springframework.scheduling.quartz.JobDetailFactoryBean">
<property name="jobClass" value="example.ExampleJob"/>
<property name="jobDataAsMap">
<map>
<entry key="timeout" value="5"/>
</map>
</property>
</bean>
----
The job detail configuration has all the information it needs to run the job (`ExampleJob`).
The timeout is specified in the job data map. The job data map is available through the
`JobExecutionContext` (passed to you at execution time), but the `JobDetail` also gets
its properties from the job data mapped to properties of the job instance. So, in the following example,
the `ExampleJob` contains a bean property named `timeout`, and the `JobDetail`
has it applied automatically:
[source,java,indent=0,subs="verbatim,quotes",chomp="-packages"]
----
package example;
public class ExampleJob extends QuartzJobBean {
private int timeout;
/**
* Setter called after the ExampleJob is instantiated
* with the value from the JobDetailFactoryBean.
*/
public void setTimeout(int timeout) {
this.timeout = timeout;
}
protected void executeInternal(JobExecutionContext ctx) throws JobExecutionException {
// do the actual work
}
}
----
All additional properties from the job data map are available to you as well.
NOTE: By using the `name` and `group` properties, you can modify the name and the group
of the job, respectively. By default, the name of the job matches the bean name
of the `JobDetailFactoryBean` (`exampleJob` in the preceding example above).
[[scheduling-quartz-method-invoking-job]]
=== Using the `MethodInvokingJobDetailFactoryBean`
Often you merely need to invoke a method on a specific object. By using the
`MethodInvokingJobDetailFactoryBean`, you can do exactly this, as the following example shows:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="jobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject" ref="exampleBusinessObject"/>
<property name="targetMethod" value="doIt"/>
</bean>
----
The preceding example results in the `doIt` method being called on the
`exampleBusinessObject` method, as the following example shows:
[source,java,indent=0,subs="verbatim,quotes"]
----
public class ExampleBusinessObject {
// properties and collaborators
public void doIt() {
// do the actual work
}
}
----
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="exampleBusinessObject" class="examples.ExampleBusinessObject"/>
----
By using the `MethodInvokingJobDetailFactoryBean`, you need not create one-line jobs
that merely invoke a method. You need only create the actual business object and
wire up the detail object.
By default, Quartz Jobs are stateless, resulting in the possibility of jobs interfering
with each other. If you specify two triggers for the same `JobDetail`, it is possible
that the second one starts before the first job has finished. If `JobDetail` classes
implement the `Stateful` interface, this does not happen: the second job does not start
before the first one has finished.
To make jobs resulting from the `MethodInvokingJobDetailFactoryBean` be non-concurrent,
set the `concurrent` flag to `false`, as the following example shows:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean id="jobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject" ref="exampleBusinessObject"/>
<property name="targetMethod" value="doIt"/>
<property name="concurrent" value="false"/>
</bean>
----
NOTE: By default, jobs will run in a concurrent fashion.
[[scheduling-quartz-cron]]
=== Wiring up Jobs by Using Triggers and `SchedulerFactoryBean`
We have created job details and jobs. We have also reviewed the convenience bean that lets
you invoke a method on a specific object. Of course, we still need to schedule the
jobs themselves. This is done by using triggers and a `SchedulerFactoryBean`. Several
triggers are available within Quartz, and Spring offers two Quartz `FactoryBean`
implementations with convenient defaults: `CronTriggerFactoryBean` and
`SimpleTriggerFactoryBean`.
Triggers need to be scheduled. Spring offers a `SchedulerFactoryBean` that exposes
triggers to be set as properties. `SchedulerFactoryBean` schedules the actual jobs with
those triggers.
The following listing uses both a `SimpleTriggerFactoryBean` and a `CronTriggerFactoryBean`:
[source,xml,indent=0]
[subs="verbatim"]
----
<bean id="simpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerFactoryBean">
<!-- see the example of method invoking job above -->
<property name="jobDetail" ref="jobDetail"/>
<!-- 10 seconds -->
<property name="startDelay" value="10000"/>
<!-- repeat every 50 seconds -->
<property name="repeatInterval" value="50000"/>
</bean>
<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail" ref="exampleJob"/>
<!-- run every morning at 6 AM -->
<property name="cronExpression" value="0 0 6 * * ?"/>
</bean>
----
The preceding example sets up two triggers, one running every 50 seconds with a starting delay of 10
seconds and one running every morning at 6 AM. To finalize everything, we need to set up the
`SchedulerFactoryBean`, as the following example shows:
[source,xml,indent=0,subs="verbatim,quotes"]
----
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="cronTrigger"/>
<ref bean="simpleTrigger"/>
</list>
</property>
</bean>
----
More properties are available for the `SchedulerFactoryBean`, such as the calendars used by the
job details, properties to customize Quartz with, and a Spring-provided JDBC DataSource. See
the {api-spring-framework}/scheduling/quartz/SchedulerFactoryBean.html[`SchedulerFactoryBean`]
javadoc for more information.
NOTE: `SchedulerFactoryBean` also recognizes a `quartz.properties` file in the classpath,
based on Quartz property keys, as with regular Quartz configuration. Please note that many
`SchedulerFactoryBean` settings interact with common Quartz settings in the properties file;
it is therefore not recommended to specify values at both levels. For example, do not set
an "org.quartz.jobStore.class" property if you mean to rely on a Spring-provided DataSource,
or specify an `org.springframework.scheduling.quartz.LocalDataSourceJobStore` variant which
is a full-fledged replacement for the standard `org.quartz.impl.jdbcjobstore.JobStoreTX`.
@@ -1,12 +0,0 @@
[[languages]]
= Language Support
include::attributes.adoc[]
include::page-layout.adoc[]
include::languages/kotlin.adoc[leveloffset=+1]
include::languages/groovy.adoc[leveloffset=+1]
include::languages/dynamic-languages.adoc[leveloffset=+1]

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