Choice
The Content Based Router from the EIP patterns allows you to route messages to the correct destination based on the contents of the message exchanges.
Choice options
The Choice EIP supports 2 options which are listed below:
Name | Description | Default | Type |
---|---|---|---|
whenClauses |
Sets the when clauses |
List |
|
otherwise |
Sets the otherwise node |
OtherwiseDefinition |
Examples
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
RouteBuilder builder = new RouteBuilder() {
public void configure() {
from("direct:a")
.choice()
.when(simple("${header.foo} == 'bar'"))
.to("direct:b")
.when(simple("${header.foo} == 'cheese'"))
.to("direct:c")
.otherwise()
.to("direct:d");
}
};
See Why
can I not use when or otherwise in a Java Camel route if you have
problems with the Java DSL, accepting using |
And the same example using XML:
<camelContext xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="direct:a"/>
<choice>
<when>
<simple>${header.foo} == 'bar'</simple>
<to uri="direct:b"/>
</when>
<when>
<simple>${header.foo} == 'cheese'</simple>
<to uri="direct:c"/>
</when>
<otherwise>
<to uri="direct:d"/>
</otherwise>
</choice>
</route>
</camelContext>