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First we take a moment to look at the Enterprise Integration Patterns - the base pattern catalog for integration scenarios. In particular we focus on the Pipes and filters EIP pattern, that is - a central pattern. This is used for: to route messages through a sequence of processing steps, each performing a specific function - much like the Java Servlet Filters.

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In this sample we want to process a message in a sequence of steps where each steps can perform their specific function. In our example we have a JMS queue for receiving new orders. When an order is received we need to process it in several steps:

• validate
• register
• send confirm email

This can be created in a route like this:

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This example is also based on the in-only message exchange pattern. What you must understand as well is the in-out message exchange pattern, where the caller expects a response. We will look into this in another example.

See also

• Examples
• Tutorials
• User Guide