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After started, we can view the routes configured in camel context by directing your browser to http://localhost:8080/routes^{Image Removed}.
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There are originally several message files in the directory: src/data and the message system processes them once it is started. We can get the processing result by checking the console and the files in target/messages.

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from("file:src/data?noop=true").convertBodyTo(java.lang.String.class).to("stream:out")
  .loadBalance().random()
    .to("activemq:personnel.records1")
    .to("activemq:personnel.records2")
  .end()

Let the route2 collect messages from both queues providing the load balance support:

from("activemq:personnel.records1", "activemq:personnel.records2")
  .choice()
    .when().xpath("/person/city = 'London'").to("file:target/messages/uk")
    .otherwise().to("file:target/messages/others")
  .end()

With these two operations, you have complete this work. Just throw your message into the directory, camel will process and deliver it automatically. By the way, you may need some Dead Letter Channel configuration for it since XML analyzing with rigid format usually accompanies frequent error.

Source code

If you would not like to build it by yourself, a copy is here:
LoadBalanceSample
Just extract it and run it.