This commit revisit the build configuration to enforce the following:
* A single Java toolchain is used consistently with a recent Java
version (here, Java 23) and language level
* the main source is compiled with the Java 17 "-release" target
* Multi-Release classes are compiled with their respective "-release"
target. For now, only "spring-core" ships Java 21 variants.
Closes gh-34507
The spring-jcl module no longer exists on main, but it still exists on
the 6.2.x branch and previous branches and can cause build failures when
switching between branches.
This commit adds a new custom build Plugin, the `ArchitecturePlugin`.
This plugin is using ArchUnit to enforce several rules in the main
sources of the project:
* All "package-info" should be `@NullMarked`
* Classes should not import forbidden types (like "reactor.core.support.Assert"
* Java Classes should not import "org.jetbrains.annotations.*" annotations
* Classes should not call "toLowerCase"/"toUpperCase" without a Locale
* There should not be any package tangle
Duplicate rules were removed from checkstyle as a result.
Note, these checks only consider the "main" source sets, so test
fixtures and tests are not considered. Repackaged sources like JavaPoet,
CGLib and ASM are also excluded from the analysis.
Closes gh-34276
In order to be able to fix gh-34140 which requires using at least a
Java 22 compiler, this commit intends to change the configuration of
the Gradle toolchain to use Java 23, while setting the Java release to
Java 17 (or other versions when using MRJARs) when relevant in order to
keep the current Java 17 baseline.
See gh-34220
Spring Framework 7.0 will use a Kotlin 2 baseline, using the latest 2.x
release at the time of the release.
This commit upgrades Kotlin to 2.1.0, and Kotlin Serialization and
Coroutines accordingly.
Closes gh-33629
This commit adds a DSL Gradle extension for optionally enabling Java
preview features in a specific project module. The "--enable-preview"
JVM flag will be configured automatically for compile and test tasks
where this is applied:
```
springFramework {
enableJavaPreviewFeatures = true
}
```
See gh-33616
Prior to this commit, the Gradle build output the following warning
multiple times.
OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
Since we don't need CDS enabled for our tests, I've added `-Xshare:off`
as a JVM argument for our tests to disable CDS.
(cherry picked from commit 27985b1439)
Commit 84714fbae9 introduced usage of the
-Djava.locale.providers=COMPAT command-line argument for javac in order
to allow our JDK 20 builds to pass by using legacy locale data.
That was done to ensure that Date/Time formats using AM/PM produced a
standard space (" ") before the "AM" or "PM" instead of a narrow
non-breaking space (NNBSP "\u202F"), which was introduced in Java 20
due to adoption of Unicode Common Locale Data Repository (CLDR-14032).
This commit removes usage of the -Djava.locale.providers=COMPAT
command-line argument and updates all affected tests to:
- Use an NNBSP before "AM" or "PM" in input text when running on Java 20
or higher.
- Leniently match against any Unicode space character in formatted
values containing "AM" or "PM".
See https://jdk.java.net/20/release-notes#JDK-8284840
See https://unicode-org.atlassian.net/browse/CLDR-14032
See gh-30185
Closes gh-33144
Juergen Hoeller
Brian Clozel
Vincent Potucek
rstoyanchev
Daeho Kwon
Sam Brannen
Sébastien Deleuze
Juergen Hoeller
Brian Clozel
Stéphane Nicoll
Johnny Lim