lightweight publish/subscribe framework in java

Posted by mdma on Stack Overflow See other posts from Stack Overflow or by mdma
Published on 2010-06-13T15:48:10Z Indexed on 2010/06/13 15:52 UTC
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java

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framework

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publish-subscribe

Is there a good lightweight framework for java that provides the publish/subscribe pattern?

Some ideal features

Support for generics
Registration of multiple subscribers to a publisher
API primarily interfaces and some useful implementations
purely in-memory, persistence and transaction guarantees not required.

I know about JMS but that is overkill for my need. The publish/subscribed data are the result of scans of a file system, with scan results being fed to another component for processing, which are then processed before being fed to another and so on.

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