I can't quite figure out whether Apache OLTU (http://oltu.apache.org/ - Java OAuth 2 implementation) is production ready or not. The distribution files on the Download page all currently end in *-0.22-incubating.zip. Does anyone have experience with Jersey 2.4.1 + Apache OLTU 0.22 in a production environment? Would it be better to go with the OAuth 1 implementation that already ships with Jersey and wait until OAuth 2 is also implemented?
While this answer is a year late, I hope anyone still looking for Apache Oltu will find this useful.
Apache Oltu has made a production release version 1.0.0 around March 2014. This supports OAuth 2. So, you can now use Apache Oltu for your projects. You can get it from Maven Central at http://search.maven.org/#search%7Cga%7C1%7Capache%20oltu.