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An application is using Messaging. It consumes Messages from a Message Channel, but it does not necessarily want to consume all of the messages on that channel, just some of them.

How can a message consumer select which messages it wishes to receive?

Make the consumer a Selective Consumer, one that filteres the messages delivered by its channel so that it only receives the ones that match its criteria.

There are three parts to this filtering process:

Related patterns: Competing Consumers, Content-Based Router, Correlation Identifier, Datatype Channel, Durable Subscriber, Event-Driven Consumer, Message Filter, Guaranteed Delivery, Invalid Message Channel, Message, Message Channel, Message Dispatcher, Message Expiration, Messaging, Point-to-Point Channel, Polling Consumer, Publish-Subscribe Channel, Request-Reply, Transactional Client

For a full description of the pattern see:

Enterprise Integration Patterns Gregor Hohpe and Bobby Woolf ISBN 0321200683 650 pages Addison-Wesley

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