Customizing Operation/Span for JAX-RS

[dmossakowski]

Hi, in our application we use very few entry points which are like:

        @POST
	@Path("/{method: .+}")
	public Object postData

When this is mapped to /ws we see a single operation as ws/{method: .+} and all requests against it.

As you can imagine this is not very useful. I know that this could be done in code to set name of the Span but is there a way to configure this to use http.target or http.url information?

[iNikem]

This follows Otel semantic conventions which says that span name for HTTP server spans should be the route that the request was mapped to. Currently there is no built-in way to change this.

[dmossakowski]

Thanks Nikita, I saw somewhere that there was a way to configure routes. Is that a possible avenue for doing this? Could we manually specify routes based on a dynamic condition where http.target=ws/someMethod ?
someMethod.route
http.target=ws/someMethod
someMethod2.route
http.target=ws/someMethod2

[iNikem]

There is no such functionality atm.

[dmossakowski]

Thanks Nikita, what would be your recommendation for us increase the cardinality of operations? Can we customize the operation in code itself? How would we do that? Span.current().updateName() or something?

https://github.com/open-telemetry/opentelemetry-java/blob/main/api/all/src/main/java/io/opentelemetry/api/trace/Span.java

[iNikem]

Yes, Span.current().updateName() is totally legal way to do that. Please try, if this works for you.