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This mini-guide takes you through the source code of a simple example.

Camel can be configured either by using Spring or directly in Java - which this example does.

We start with creating a CamelContext - which is a container for Components, Routes etc:

{snippet:id=e1|lang=java|url=activemq/camel/trunk/examples/camel-example-jms-file/src/main/java/org/apache/camel/example/jmstofile/CamelJmsToFileExample.java}

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{snippet:id=e3|lang=java|url=activemq/camel/trunk/examples/camel-example-jms-file/src/main/java/org/apache/camel/example/jmstofile/CamelJmsToFileExample.java}

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{snippet:id=e2|lang=java|url=activemq/camel/trunk/examples/camel-example-jms-file/src/main/java/org/apache/camel/example/jmstofile/CamelJmsToFileExample.java}

The above works with any JMS provider. If we know we are using ActiveMQ we can use an even simpler form using the activeMQComponent() method while specifying the brokerURL used to connect to ActiveMQ

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In normal use, an external system would be firing messages or events directly into Camel through one if its Components but we are going to use the ProducerTemplate which is a really easy way for testing your configuration:

{snippet:id=e4|lang=java|url=activemq/camel/trunk/examples/camel-example-jms-file/src/main/java/org/apache/camel/example/jmstofile/CamelJmsToFileExample.java}

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{snippet:id=e5|lang=java|url=activemq/camel/trunk/examples/camel-example-jms-file/src/main/java/org/apache/camel/example/jmstofile/CamelJmsToFileExample.java}

What happens?

From the ProducerTemplate - we send objects (in this case text) into the CamelContext to the Component test-jms:queue:test.queue. These text objects will be converted automatically into JMS Messages and posted to a JMS Queue named test.queue. When we set up the Route, we configured the FileComponent to listen of the test.queue.

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