Add Observed Tomcat Valve

[marcingrzejszczak]

Example here https://github.com/micrometer-metrics/micrometer-samples/blob/4f9a6cd9d1c12fa19ec79a49766cce6afccd5ce2/micrometer-samples-boot3-web/src/main/java/io/micrometer/boot3/samples/web/ManualConfiguration.java#L41-L96

[fischermatte]

@marcingrzejszczak Do you have a solution to this?

[jonatan-ivanov]

What are you seeking a solution for?
Have you checked the code in the description of this PR?

[fischermatte]

Sry, maybe I misunderstood something. I am coming from this issue (Exceptions are not logged with span-id/trace-id with latest spring boot). There @bclozel mentioned this

"You can follow #3777 if you'd like to instrument your application at a lower level with Tomcat."

Now it looks like this PR is still open for some reason. Do you see any chance that exceptions logged from tomcat itself can be enhanced with a trace-id/span-id?

[marcingrzejszczak]

Tomcat valve instrumentation is done here - #3989