Does an Open Source implementation of "Message Bus" pattern exist for Delphi?

Question

I'm looking for an implementation of this Enterprise Integration Pattern

http://msdn.microsoft.com/en-us/library/ms978583.aspx

explained in a more general way on

http://www.eaipatterns.com/Messaging.html

Does an Open Source implementation of "Message Bus" (or message queue) pattern exist for Delphi?

Answer 1

This is more of a specific use of the publish/subscribe pattern. I believe an open sourced version is available here which implements a message queue. If you search for the publish subscribe pattern, you might get more hits that reach more of what your looking for.

Answer 2

The Enterprise Edition of Components4Developers kbmMW includes messaging features (Wide Information Bus support, subject based publish/subscribe support, Synchrone and asynchrone Request/Response support, Support for selective relay and gatewaying messages, Transactional message queues ...). It is not open source however.

A video presentation is here.