Java 21 Masterplan

[cdietrich]

Once Java 21 LTS is out we should try to support it

• set minimum supported version to Java 17, Drop Java 11 (build)
• adapt JavaVersion Enum
• adapt Wizard test
• asm version?
• adapt platform dependencies in dev-bom
• adapt minimal target platform
• adapt gradle version in wizard
• check if classgraph needs adaptation?
• check if tycho needs adaptation?
• Guice/Guava update needed?
• new MWE?
• check java version switches in tests
• new Jetty version needed?
• with new minimal target version, check which reflective switches we can get rid of (platform, jdt)
• deal with Java deprecations

TODO: 100 things i have forgot

[cdietrich]

Guice and Guava is now on latest. we will see if this is sufficient

[OLibutzki]

As Java 21 has been released today, do you have any roadmap when to support it? Especially solving the jdt issue mentioned in #2680 is something we are looking forward to.

[cdietrich]

There is no road map and as Xtext is no longer my day job it might take long. First question: are Java 21 capable eclipse platform and jdt maven artifacts already available or will they ship in December ?

[OLibutzki]

Hmm, this issue is "open", no new comments for months.

eclipse-jdt/eclipse.jdt.core#890

[cdietrich]

https://github.com/eclipse-jdt/eclipse.jdt.core/commits/BETA_JAVA21 Shows some wip

[mpalat]

Please see : https://www.eclipse.org/lists/eclipse-dev/msg12203.html

[cdietrich]

with https://www.eclipse.org/lists/eclipse-dev/msg12207.html we wont have maven artifacts before end of year.
am not sure if there are maven snapshots meanwhile so development can start before

[DanySK]

Hi, is there any update on this plan?

I guess that errors like org.eclipse.xtext.common.types.access.TypeResource$CannotLoadTypeResourceException: java.lang.IllegalArgumentException: Unsupported class file major version 65 are due to Xtext not yet supporting Java 21 - am I correct?

I am asking because this is preventing Protelis from becoming Java 21 compliant which, in turn, also prevents Java 21 compliance for the Alchemist Simulator.

[cdietrich]

No jdt java 21 maven artifacts no java 21 in Xtext

[cdietrich]

Besides that: when these become available this is a help wanted story

[gmlongo1]

Has there been any progress on this? We make excessive use of generators in our daily builds and are looking to move to Java 21 in the very near future.

[cdietrich]

Obviously no. And Xtext is no longer my day job. And nobody seems to step in

[gmlongo1]

Not sure why "obviously" was needed, as its been 4+ months so we were just looking for any feedback. Are we saying xtext is no longer being officially maintained? If there is no roadmap for Java 21+, those of us that heavily rely on xtext will have to make plans to move away from the tool.