An enterprise has two separate applications that need to communicate, preferably by using Messaging.
How does one application communicate with another using messaging?
Connect the applications using a Message Channel, where one application writes information to the channel and the other one reads that information from the channel.
When an application has information to communicate, it doesn't just fling the information into the messaging system, it adds the information to a particular Message Channel. An application receiving information doesn't just pick it up at random from the messaging system; it retrieves the information from a particular Message Channel....
Related patterns: Channel Adapter, Datatype Channel, Invalid Message Channel, Message Bus, Message Endpoint, Selective Consumer, Messaging, Introduction to Messaging Channels, Point-to-Point Channel, Publish-Subscribe Channel
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Enterprise Integration Patterns
Gregor Hohpe and Bobby Woolf
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