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The Command Message EIP allows you to use messaging, to invoke a procedure in another application. For more information, refer to see http://www.eaipatterns.com/CommandMessage.html.
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This example demonstrates how the ESB uses messaging to invoke functionality provided by an application, in this case a stock quote service. A command message can be in any form, including a JMS serialized object or a text message in the form of an XML or SOAP request. In this example, the ESB will pass the message as a document to a sample Axis2 server and invoke the operation directly using the Callout mediator.
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| Command Message EIP (Figure 1) | Command Message Example Scenario (Figure 2) |
|---|---|
| Sender | Stock Quote Client |
| Command Message | Callout mediator |
| Receiver | Stock Quote Service |
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