René Cordier created JAMES-3961:
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Summary: Migrate code base to JDK21
Key: JAMES-3961
URL: https://issues.apache.org/jira/browse/JAMES-3961
Project: James Server
Issue Type: Improvement
Reporter: René Cordier
Fix For: 3.9.0
The community seems in favor of adopting JDK 21 and migrating the code base to
it. Multiple reasons for it:
* JDK 11 reached officially EOL
* JDK 21 is the latest LTS
* multiple new features like records (bye bye boilerplates on POJOs), pattern
matching, better GC, better thread management, ...
Few things to keep in mind as well:
* should we switch our modules to Jigsaw modules?
* should we maintain a JDK11 version in parallel for letting time for
everybody to do the switch?
How:
* ADR explaining the change
* switch the JDK to 21 in the code base
* modify the code to get a green build with minimal changes first
* update documentation accordingly
* can refactoring things little by little after (like switching to records for
POJOs for example)
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