Add OSGi support for API and SDK

[Sandared]

It would be awesome if ot api and sdk could provide manifests with proper OSGi entries, e.g., by using the bnd gradle plugin that calculates them automatically :)

[LWogan]

Added a PR to do this here:
#4627

[royteeuwen]

Could you give input if this is feasible? We also want to include opentelemetry into an OSGi application and would love to have the osgi manifest headers available

[jkwatson]

None of the maintainers are very familiar with OSGI, so your best bet is a contribution at this point.

[royteeuwen]

@jkwatson I have created a very basic PR that adds OSGi support. It only adds a gradle plugin that automatically sets the correct headers and added the exportcontents manifest so that every package is available for OSGi usage. How can we get this merged :)?

[jkwatson]

@jkwatson I have created a very basic PR that adds OSGi support. It only adds a gradle plugin that automatically sets the correct headers and added the exportcontents manifest so that every package is available for OSGi usage. How can we get this merged :)?

Hi @royteeuwen . I noticed the PR. We're looking for someone (anyone!) who knows something about OSGi to help review this. Post xz, you can understand how we're a bit cautious about accepting changes to our build process from people who have not been active in the community, with plugins that none of us are familiar with.

Would you be able to attend one of our weekly Java SIG meetings to help us get to know you and feel comfortable with the addition to the build process?

[bdhoine]

@jkwatson I also added a commit and opened a PR to semcov (open-telemetry/semantic-conventions-java#87) to achieve the same and I'm also working on opening a PR on the libraries. If you would like me to join also feel free reach out.

[royteeuwen]

@jkwatson of course! I'm an Apache committer myself (royteeuwen: https://people.apache.org/committer-index.html#R)

I also have some other open source projects under my organisation name Orbinson:
https://github.com/orbinson

@bdhoine and myself are also hosting a session at a conference, specifically highlighting all capabilities of OpenTelemetry in AEM, which is a platform that is built upon OSGi:

https://adapt.to/2024/schedule/observability-in-aemaacs-with-opentelemetry

There are enough other OSGi based platforms that would benefit a lot of having things, I can name some if it is of interest.

Just shout how I can join the Java SIG and I'll join to give an intro of myself and what the PR does

[jkwatson]

Meeting info can be found here: https://github.com/open-telemetry/community?tab=readme-ov-file#implementation-sigs

[jkwatson]

@royteeuwen have you had a chance to test the resulting artifacts from this change? Concerns were expressed offline about whether you need to consider the internal classes as well, since they are used, but not intended for public consumption.