[CONF] Apache Camel > Message Router

[confluence]

Message Router Page edited by Claus Ibsen Changes (2) ... h4. Choice without otherwise If you use a {{choice}} without adding an {{otherwise}}, any unmatched exchanges will be dropped by default. If you prefer to have an exception for an unmatched exchange, you can add a {{throwFault}} to the {{otherwise}}. {code:java} ....otherwise().throwFault("No matching when clause found on choice block"); {code} {include:Using This Pattern} Full Content Message Router The Message Router from the EIP patterns allows you to consume from an input destination, evaluate some predicate then choose the right output destination. The following example shows how to route a request from an input queue:a endpoint to either queue:b, queue:c or queue:d depending on the evaluation of various Predicate expressions Using the Fluent Builders RouteBuilder builder = new RouteBuilder() { public void configure() { errorHandler(deadLetterChannel("mock:error")); from("seda:a") .choice() .when(header("foo").isEqualTo("bar")) .to("seda:b") .when(header("foo").isEqualTo("cheese")) .to("seda:c") .otherwise() .to("seda:d"); } }; Using the Spring XML Extensions <camelContext errorHandlerRef="errorHandler" xmlns="http://camel.apache.org/schema/spring"> <route> <from uri="seda:a"/> <choice> <when> <xpath>$foo = 'bar'</xpath> <to uri="seda:b"/> </when> <when> <xpath>$foo = 'cheese'</xpath> <to uri="seda:c"/> </when> <otherwise> <to uri="seda:d"/> </otherwise> </choice> </route> </camelContext> Choice without otherwise If you use a choice without adding an otherwise, any unmatched exchanges will be dropped by default. Using This Pattern If you would like to use this EIP Pattern then please read the Getting Started, you may also find the Architecture useful particularly the description of Endpoint and URIs. Then you could try out some of the Examples first before trying this pattern out. Change Notification Preferences View Online | View Changes | Add Comment