Best framework and best practice for OAuth2.0 auth-server and provider implementation?

I have some rest-service(simple fileuploader) on scala play and now we need protect this with oauth2 protocol. I try found any scala oauth2-frameworks but they not supported implicit flow. I decided use java for ouath2 server but now i can't decide which framework should i choose. I have a choice between Spring Security OAuth and Apache CXF OAuth. I never work with this frameworks and hope that someone more experienced can give me any advices and help in choice Sorry for my bad English.