Deprecate SmallRye Metrics

[radcortez]

• Quarkus SmallRye Metrics has been announced as deprecated since 2023: https://quarkus.io/blog/quarkus-observability-roadmap-2023/.
• Also, on the guide page: https://quarkus.io/guides/smallrye-metrics.
• MicroProfile Metrics was also removed from MicroProfile 7.0: https://download.eclipse.org/microprofile/microprofile-7.0/microprofile-spec-7.0.html#microprofile7.0

This PR fails the build when using Quarkus SmallRye Metrics for increased awareness of our intention to remove the extension (after the next LTS). The extension can be reenabled by setting quarkus.smallrye-metrics.deprecated.enabled=true.

• Relates to Removed SmallRye Metrics #49735
• Requires Removed SmallRye Metrics quarkus-quickstarts#1565

[quarkus-bot]

/cc @ebullient (metrics), @gsmet (hibernate-orm), @jmartisk (metrics)

[github-actions]

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[quarkus-bot]

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[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 2fcf402.

Failing Jobs

Status	Name	Step	Failures	Logs	Raw logs	Build scan
❌	Quickstarts Compilation - JDK 17	Compile Quickstarts	Failures	Logs	Raw logs	🚧

You can consult the Develocity build scans.

Failures

⚙️ Quickstarts Compilation - JDK 17 #

- Failing: microprofile-metrics-quickstart 

📦 microprofile-metrics-quickstart

❌ Failed to execute goal io.quarkus:quarkus-maven-plugin:999-SNAPSHOT:build (default) on project microprofile-metrics-quickstart: Failed to build quarkus application

[radcortez]

Are we ok to include this on the next LTS?

[jmartisk]

The "next LTS" (3.27) is scheduled for Final release today... So I have serious doubts about that TBH, given that it's a breaking change and coming at the last minute, I don't think so. Let's hear what @gsmet thinks, but my guess is this will need to go in to 3.29 (3.28 is also releasing today, right?)

[radcortez]

We discussed this on Zulip some time ago, and we opened the PR 2 weeks ago:
https://quarkusio.zulipchat.com/#narrow/channel/187038-dev/topic/Remove.20quarkus-smallrye-metrics/with/537063154

Unfortunately, it went under the radar. I would like to avoid having to keep this for yet another year.

[radcortez]

To clarify, this is not removing the extension, is just disabling it (if being used), with a warning message and a configuration to reenable it again. The change is minimal.

[jmartisk]

IIUC it will fail the build unless the user explicitly adds a new property, so I wouldn't exactly call it minimal. Well, @gsmet has already kicked off 3.27.0 and 3.28.0 releases, so this discussion is now moot anyway.