[GH-ISSUE #292] DPS - 3 - Make DPS jar compatible with jre 8 #108

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opened 2026-02-26 04:34:04 +03:00 by kerem · 3 comments

kerem commented

2026-02-26 04:34:04 +03:00

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Originally created by @mageddo on GitHub (Feb 20, 2023).
Original GitHub issue: https://github.com/mageddo/dns-proxy-server/issues/292

What is expected

Make DPS jar run in jre 8

What is Happening

Actually compatible with jre 17

Changes (Optional)

Initial work using jabel is done at this branch

Research

jabel make it possible compile java 17 code into jre 8 target but won't support jdk9+ new methods or classes like Set.of() and go on
UniJ has the proposal to implement jdk 9+ classes for jdk 8, the project is out of date and you need to use the prefix Uni for each class you use, like UniList.of()
refaster maybe can fix unij limitation by merging the new implementations to List and go on
here a discussion on jabel github about that but no proposal to merge all this stuff into a new tool
Another impeditive to use jre 8 is that DPS need java 16 support for unix sockets to be fully compatible with docker, need to find a lib replacement for that, docker-java library have a lot of incompatible stuff with native image, old jres and so on though, maybe think in a better replacement for docker java

Originally created by @mageddo on GitHub (Feb 20, 2023). Original GitHub issue: https://github.com/mageddo/dns-proxy-server/issues/292 ### What is expected Make DPS jar run in jre 8 ### What is Happening Actually compatible with jre 17 ### Changes (Optional) * Initial work using jabel is done at [this branch][5] ## Research * [jabel][1] make it possible compile java 17 code into jre 8 target but won't support jdk9+ new methods or classes like Set.of() and go on * [UniJ][2] has the proposal to implement jdk 9+ classes for jdk 8, the project is out of date and you need to use the prefix `Uni` for each class you use, like `UniList.of()` * [refaster][3] maybe can fix unij limitation by merging the new implementations to List and go on * [here][4] a discussion on jabel github about that but no proposal to merge all this stuff into a new tool * Another impeditive to use jre 8 is that DPS need java 16 support for unix sockets to be fully compatible with docker, need to find a lib replacement for that, docker-java library have a lot of incompatible stuff with native image, old jres and so on though, maybe think in a better replacement for docker java [1]: https://github.com/bsideup/jabel [2]: https://github.com/tlinkowski/UniJ [3]: https://errorprone.info/docs/refaster [4]: https://github.com/bsideup/jabel/issues/3 [5]: https://github.com/mageddo/dns-proxy-server/compare/jre-8?expand=1

kerem

2026-02-26 04:34:04 +03:00

closed this issue
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kerem commented

2026-02-26 04:34:04 +03:00

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@mageddo commented on GitHub (Feb 22, 2023):

we are considerably far to achieve this feature, better people try to use the binary releases or just download jre 17+ and use the jar

@mageddo commented on GitHub (Feb 22, 2023): we are considerably far to achieve this feature, better people try to use the binary releases or just download jre 17+ and use the jar

kerem commented

2026-02-26 04:34:04 +03:00

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@mageddo commented on GitHub (Feb 25, 2023):

I think it won't be possible, best choice is to tryout the native image binaries we have, and on the future also provide a Windows binary. As a fallback run the jar which requires jre 17+

@mageddo commented on GitHub (Feb 25, 2023): I think it won't be possible, best choice is to tryout the native image binaries we have, and on the future also provide a Windows binary. As a fallback run the jar which requires jre 17+

kerem commented

2026-02-26 04:34:04 +03:00

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Owner

@mageddo commented on GitHub (Feb 25, 2023):

See https://github.com/mageddo/dns-proxy-server/issues/306 for windows binary release support

@mageddo commented on GitHub (Feb 25, 2023): See https://github.com/mageddo/dns-proxy-server/issues/306 for windows binary release support

kerem referenced this issue

2026-02-26 04:34:43 +03:00

[PR #113] [MERGED] Configurable containers domain #279