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An application needs to consume Messages as soon as they’re delivered.

How can an application automatically consume messages as they become available?

The application should use an Event-Driven Consumer, one that is automatically handed messages as they’re delivered on the channel.

This is also known as an asynchronous receiver, because the receiver does not have a running thread until a callback thread delivers a message. We call it an Event-Driven Consumer because the receiver acts like the message delivery is an event that triggers the receiver into action.

Related patterns: Competing Consumers, Durable Subscriber, Message, Message Channel, Message Dispatcher, Selective Consumer, Polling Consumer, Transactional Client

Find the full description of this pattern in: Enterprise Integration Patterns Gregor Hohpe and Bobby Woolf ISBN 0321200683 650 pages Addison-Wesley

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