Available as of Camel 2.4
There is a org.apache.camel.spi.ProcessorFactory which allows you to use a custom factory for creating Processor based on the Camel routes.
Here is a custom factory which will alter the processor definitions.
The unit test and route is as follows:
Now the idea is that the setBody processors has been changed by the factory to set a different body.
Notice we just return null which instructs Camel to use its default implementation to create the Processor. After all we just wanted to manipulate the definition. However if you do return a Processor then Camel use the returned processor.
In Java DSL all you need to do is to configure the custom factory on the CamelContext using the setProcessorFactory method:
In Spring XML all you have to do is just to declare a <bean> tag with the custom factory, and Camel will automatic lookup it up and use it.