I don't come across work that requires much experience with multi-threading. So I was wondering if anyone know of site (open source project) where I could take look at real world examples of some heavy duty code that takes care of thread pools solves deadlock situation, uses nonblocking algorithms, reentrant locks, join-fork, futures-callables well you get the idea.
To be more specific I'm looking for J2EE and MOM integration and messaging used between them.