Using java libraries from jruby rails code

[jlahtinen]

We have a rails app that uses https://github.com/open-telemetry/opentelemetry-ruby-contrib/tree/main/instrumentation/all and all works nicely.

Our app uses Apache HttpClient 4.3 and I was wondering how to use https://github.com/open-telemetry/opentelemetry-java-instrumentation/tree/main/instrumentation/apache-httpclient/apache-httpclient-4.3/library

I would like to start first without using Java agent and just change my app code to use TracingHttpClientBuilder (is this correct way?).

But I am a little confused how do I pass OpenTelemetry instance to TracingHttpClientBuilder. SDK is initialized in ruby "code/side" with OpenTelemetry::SDK.configure { |c| c.use_all }

So any examples/ideas how to close this cap between java libraries and ruby code?