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List:       james-dev
Subject:    [jira] [Resolved] (JAMES-3961) Migrate code base to JDK21
From:       René_Cordier_(Jira) <server-dev () james ! apache ! org>
Date:       2024-04-03 5:03:00
Message-ID: JIRA.13557667.1699861474000.106750.1712120580046 () Atlassian ! JIRA
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     [ https://issues.apache.org/jira/browse/JAMES-3961?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
]

René Cordier resolved JAMES-3961.
---------------------------------
    Resolution: Fixed

We migrated to java 21

> 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
> Priority: Major
> Fix For: 3.9.0
> 
> Time Spent: 3h 40m
> Remaining Estimate: 0h
> 
> 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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