(Ensemble) Route messages to subscribers based on their expressed interests.
Publish and subscribe
refers to a technique where a message is sent to one or more subscribers based on their interest in a specific topic. Typically a topic is inferred from the contents of the message.
Provides a mechanism to quickly find the set of interested subscribers for a given topic. Your application-specific business process must both invoke the PubSub routing engine and also dispatch messages to subscribers as part of a business process (this is in order to make the actual processing of messages as flexible as possible).
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