parallel java libraries

Question

I'm looking for Java libraries/applications which are parallel and feature objects that can be queried in parallel. That is, there is/are objects in which multiple types of operations can be made from different threads and these will be synchronized.

It would be helpful if someone could ideas of where I could find such applications as well.

EDIT: Actually, language doesn't matter so much, so C++, Python, anything is welcome

Answer 1

In my opinion Actor based concurrency is the best (depending on what you are doing of course)

See this article for som JVM actor options.

My favourite is AKKA