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Chapter 11. System Management
Abstract
The system management patterns describe how to monitor, test, and administer a messaging system.
11.1. Detour
Detour
The Detour from the Introducing Enterprise Integration Patterns allows you to send messages through additional steps if a control condition is met. It can be useful for turning on extra validation, testing, debugging code when needed.
Example
In this example we essentially have a route like
from("direct:start").to("mock:result") with a conditional detour to the mock:detour endpoint in the middle of the route..
from("direct:start").choice()
.when().method("controlBean", "isDetour").to("mock:detour").end()
.to("mock:result");
Using the Spring XML Extensions
<route>
<from uri="direct:start"/>
<choice>
<when>
<method bean="controlBean" method="isDetour"/>
<to uri="mock:detour"/>
</when>
</choice>
<to uri="mock:result"/>
</split>
</route>
whether the detour is turned on or off is decided by the
ControlBean. So, when the detour is on the message is routed to mock:detour and then mock:result. When the detour is off, the message is routed to mock:result.
For full details, check the example source here:
