As this theserverside.com announcement shows, although OpenJPA is still in the Apache incubator and not yet certified as a Java Persistence API compliant provider, it is not far from that stage. There is a source download available and I must say, it is quite easy to build. If you want to use it in GlassFish, then it's even easier. It is as simple as these intuitive steps:
Step #1: Download and...
