Add GraalVM support to prometheus-rsocket-proxy

[klopfdreh]

Because prometheus-rsocket-proxy uses snappy-java and because this referenced library makes use of native libs packed into the dependency, the following PR needs to be merged so that GraalVM is supported: xerial/snappy-java#590. snappy-java is used in the submodule client, proxy and proxy-server

See:

• https://github.com/micrometer-metrics/prometheus-rsocket-proxy/blob/main/client/build.gradle#L12
• https://github.com/micrometer-metrics/prometheus-rsocket-proxy/blob/main/proxy-server/build.gradle#L28
• https://github.com/micrometer-metrics/prometheus-rsocket-proxy/blob/main/proxy/build.gradle#L33

[shakuzen]

I'm not sure there's anything we can/should do about this other than upgrade the version of snappy-java when/if a version is released that supports GraalVM. Am I missing anything?

[klopfdreh]

@shakuzen - this is right. I just added the issue here as others are also facing it. If snappy-java is released with the referenced PR you can update the dependency and close this issue. 👍

[shakuzen]

Thanks for the clarification and making us aware. We'll wait until we can upgrade.

[klopfdreh]

New version is released: https://github.com/xerial/snappy-java/releases/tag/v1.1.10.6 - but I guess we have to wait a bit until it is available at maven central.

[shakuzen]

Well that was quite a quick turnaround 😄

[shakuzen]

Could you confirm that the latest snapshots work with GraalVM native images now that the new version of snappy-java should be pulled in?

[klopfdreh]

I tested it already for snappy-java - if the version is resolved correctly via dependency management I think we are safe. 👍

[shakuzen]

Dependency management in this project is currently done with dynamic versions and lock files for release versions. main currently doesn't have any lock files, so the latest version of snappy-java should have been picked up in the latest snapshot build. I think we can close this if the latest snapshots are able to work with GraalVM native image compilation and running.

[klopfdreh]

Okay then let me check it - are the Snapshots also available in maven central?

[shakuzen]

Snapshots are in https://repo.spring.io/snapshot. See https://github.com/micrometer-metrics/micrometer?tab=readme-ov-file#snapshot-builds

[klopfdreh]

Hey @shakuzen - I created a demo project for you so that you are also able to test native support in future: https://github.com/klopfdreh/prometheus-rsocket-native-test

The README.md contains all required information what to do to create a Spring Boot application with prometheus-rsocket-proxy-client in a native docker image.

The server is not native compiled yet.

All in all - long explanation short answer: It works 😄

I used 2.0.0-SNAPSHOT and the newest snappy-java version was provided as dependency through that version.

[jonatan-ivanov]

@klopfdreh Thank you!