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Many enterprises use Messaging to integrate multiple, disparate applications.
How can you connect an application to the messaging system so that it can send and receive messages?
Use a Channel Adapter that can access the application's API or data and publish messages on a channel based on this data, and that likewise can receive messages and invoke functionality inside the application.
The adapter acts as a messaging client to the messaging system and invokes applications functions via an application-supplied interface. This way, any application can connect to the messaging system and be integrated with other applications as long as it has a proper Channel Adapter....
Related patterns: Canonical Data Model, Message Channel, Introduction to Message Transformation, Message Translator, Messaging, Messaging Bridge, Transactional Client
Gregor Hohpe and Bobby Woolf
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