Message Translator

Camel supports the Message Translator from the EIP patterns.

The Message Translator can be done in different ways in Camel:

Using Transform or Set Body in the DSL
Calling a Processor or bean to perform the transformation
Using template-based Components, with the template being the source for how the message is translated
Messages can also be transformed using Data Format to marshal and unmarshal messages in different encodings.

Example

Each of the approaches above is documented in the following examples:

Message Translator with Transform EIP

You can use a Transform which uses an Expression to do the transformation:

In the example below, we prepend Hello to the message body using the Simple language:

Java
XML

from("direct:cheese")
    .setBody(simple("Hello ${body}"))
    .to("log:hello");

<route>
    <from uri="activemq:cheese"/>
    <transform>
        <simple>Hello ${body}</simple>
    </transform>
    <to uri="activemq:wine"/>
</route>

Message Translator with Bean

You can transform a message using Camel’s Bean Integration to call any method on a bean that performs the message translation:

Java
XML

from("activemq:cheese")
  .bean("myTransformerBean", "doTransform")
  .to("activemq:wine");

<route>
    <from uri="activemq:cheese"/>
    <bean ref="myTransformerBean" method="doTransform"/>
    <to uri="activemq:wine"/>
</route>

Message Translator with Processor

You can also use a Processor to do the transformation:

Java
XML

from("activemq:cheese")
  .process(new MyTransformerProcessor())
  .to("activemq:wine");

<route>
    <from uri="activemq:cheese"/>
    <process ref="myTransformerProcessor"/>
    <to uri="activemq:wine"/>
</route>

Message Translator using Templating Components

You can also consume a message from one destination, transform it with something like Velocity or XQuery, and then send it on to another destination.

Java
XML

from("activemq:cheese")
    .to("velocity:com/acme/MyResponse.vm")
    .to("activemq:wine");

<route>
    <from uri="activemq:cheese"/>
    <to uri="velocity:com/acme/MyResponse.vm"/>
    <to uri="activemq:wine"/>
</route>

Message Translator using Data Format

See Marshal EIP for more details and examples.