Micrometer Observation support

[marcingrzejszczak]

I'm a co-maintainer of Spring Cloud Sleuth and Micrometer projects (together with @shakuzen and @jonatan-ivanov).

Micrometer Observation is part of the Micrometer 1.10 release and Micrometer Tracing is a new project. The idea of Micrometer Observation is that you instrument code once but you get multiple benefits out of it - e.g. you can get tracing, metrics, logging or whatever you see fit).

Since this project already records metrics I was curious if there's interest in adding Micrometer Observation support so that except for metrics, spans could be created and tracing context propagation could happen too. Via Micrometer Tracing one can use OpenTelemetry or OpenZipkin Brave Tracer, but with the handler mechanism the possibilities are endless :)

If there's such interest we could provide a PR to add support for that.

[marcingrzejszczak]

It's worth mentioning that we already have such instrumentation in Micrometer and we would be happy to donate it to this project and help maintain it in the future

[jansupol]

Hi @marcingrzejszczak,
This sounds great! We would be happy to see a contribution of Micrometer integration.

As you can see, we have some MicroProfile extensions, I can imagine having Micrometer extensions in the ext/micrometer the similar way.

How can we help you with the PR? Are there any details you would like to discuss?

[marcingrzejszczak]

Sorry for the delay - I was on PTO.

#5391 this is a PR that basically has the port of what we currently have in Micrometer. It has tests for metrics and observability listeners. This is an example of how the trace looks like from the point of view of the server