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 supports OpenCensus that is deprecated 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]

Hey I've created a draft PR #1879 where we could discuss how this could theoretically look like.

[blakeli0]

Hi @marcingrzejszczak, thanks for opening the issue! Migrating from OpenCensus to OpenTelemetry is in our long term vision but not in the near future, and adding Micrometer is not on our roadmap at this moment either.
If you are interested, you can take a look at the possibility of adding Micrometer support to gax-java, which is the runtime dependency for all the Google Cloud Client libraries.
We don't have plans to add Micrometer to gax-java at this moment either, but it is being more actively maintained and the possibility of having Micrometer support is higher. In addition, I have a PoC code for adding OpenTelemetry support to gax-java, which may give you some ideas.