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{snippet:id=e1|lang=java|url=camel/trunk/camel-core/src/test/java/org/apache/camel/processor/TryProcessorOnWhenTest.java}

Using try .. catch .. finally in Spring DSL

We show the three sample samples using Spring DSL instead.

In the route below we have all keywords in action. As the code is based on a unit test we route using Mock.

{snippet:id=e1|lang=xml|url=camel/trunk/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/SpringTryProcessorMultipleExceptionTest.xml}

And in the route below we want to indicate if an IOException occured we want to route it elsewhere and at the same time keep the exception so the original caller is notified about this exception. To do this we need to not rethrow the exception and this is why we use handled and set it to false to indicate, no we did not handle it so please keep the exception.
The 2nd exception block can be omitted but as the code is based on an unit test we want to test the behavior non IOException as well.

{snippet:id=e1|lang=xml|url=camel/trunk/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/SpringTryProcessorHandledTest.xml}

And finally we have an example of the onWhen predicate in action. We can attach it to a doCatch block and at runtime determine if the block should be triggered or not.
In our case we only want to trigger if the caused exception message contains the damn word.

{snippet:id=e1|lang=xml|url=camel/trunk/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/SpringTryProcessorOnWhenTest.xml}

See Also

• Error handling in Camel
• Error Handler
• Exception Clause