Gpars - Groovy parallel systems
Gpars is a framework which provides straightforward Java or Groovy-based APIs to declare, which parts of the code should be performed in parallel. Collections can have their elements processed concurrently, closures can be turned into composable asynchronous functions and run in the background on your behalf, mutable data can be protected by agents or software transactional memory.
GPars helps to create several independent Actors, which consume messages passed to them and communicate with other actors by sending them messages.
http://gpars.codehaus.org/
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