How to make existing graphQL-java server Apollo federation compatible?

Hi everyone!
I am new to the Apollo Federation. I have an existing Java service, that uses graphQL-java library to serve the graphQL request. How do I make my scheme federation compatible? Do I need to include any specific library which is compatible with the graphQL-java library?
Can someone guide me on this?
Thank You!

Hello :wave:
If you are using plain vanilla graphql-java without any frameworks you can take a look at federation-jvm README for example integration.

If you are using some higher level frameworks (if you don’t I would highly suggest that you would switch to use them), there a few that officially support it