An enterprise has two separate applications that are communicating via Messaging, using a Message Channel that connects them.
How can two applications connected by a message channel exchange a piece of information?
Package the information into a Message, a data record that the messaging system can transmit through a message channel.
Thus any data that is to be transmitted via a messaging system must be converted into one or more messages that can be sent through messaging channels....
Related patterns: Canonical Data Model, Command Message, Document Message, Event Message, Message Channel, Message Expiration, Message Sequence, Messaging, Request-Reply
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Enterprise Integration Patterns
Gregor Hohpe and Bobby Woolf
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