Add prometheus simple client support

[sorobon]

Is your feature request related to a problem? Please describe.

I have several projects using the Prometheus Simpleclient (https://prometheus.github.io/client_java/instrumentation/jvm/) with Spring Boot. I’d like to use this library with the same behavior as Micrometer. Is that possible?

Describe the solution you'd like

In my opinion, the best approach is to support metrics like Micrometer does (io.micrometer.prometheus.PrometheusMeterRegistry). I tried creating an extension, but it’s complex and has many edge cases.

Describe alternatives you've considered

Create an extension or migrate everything to Micrometer.

Additional context

No response

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[jaydeluca]

@sorobon I'm not sure if you have the right repository. Did you mean to open this issue in https://github.com/prometheus/client_java ?

[sorobon]

@jaydeluca Maybe I’m wrong, but I’d like the OpenTelemetry Java agent to automatically convert metrics created with the Prometheus Simpleclient library, the same way it does with Micrometer. Is that possible?

[zeitlinger]

You can use the OTLP exporter https://prometheus.github.io/client_java/otel/otlp/

[sorobon]

hanks, @zeitlinger. I’d rather just configure and use the agent than add a bunch of other libraries.

[zeitlinger]

I'm still trying to understand what your setup is

• you want to use the OTel java agent - how is OTel related to what you're doing?
• but you're saying you also want something like micrometer - which is not a java agent

[github-actions]

This issue has been labeled as stale due to lack of activity and needing author feedback. It will be automatically closed if there is no further activity over the next 7 days.

[github-actions]

This issue has been labeled as stale due to lack of activity and needing author feedback. It will be automatically closed if there is no further activity over the next 7 days.