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The following example shows how to route a request from an input seda:a endpoint to either seda:b, seda:c or seda:d depending on the evaluation of various Predicate expressions
Using the Fluent Builders
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RouteBuilder builder = new RouteBuilder() {
public void configure() {
errorHandler(deadLetterChannel("mock:error"));
from("direct:a")
.choice()
.when(header("foo").isEqualTo("bar"))
.to("direct:b")
.when(header("foo").isEqualTo("cheese"))
.to("direct:c")
.otherwise()
.to("direct:d");
}
};
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![]() Tip |
| See Why can I not use when or otherwise in a Java Camel route if you have problems with the Java DSL, accepting using when or otherwise. |
Using the Spring XML Extensions
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<camelContext errorHandlerRef="errorHandler" xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="direct:a"/>
<choice>
<when>
<xpath>$foo = 'bar'</xpath>
<to uri="direct:b"/>
</when>
<when>
<xpath>$foo = 'cheese'</xpath>
<to uri="direct:c"/>
</when>
<otherwise>
<to uri="direct:d"/>
</otherwise>
</choice>
</route>
</camelContext>
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For further examples of this pattern in use you could look at the junit test case
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Content Based Router 