Header Expression Language

The Header Expression Language allows you to extract values of named headers.

Example usage

The recipientList element of the Spring DSL can utilize a header expression like:

{snippet:id=e1|lang=xml|url=camel/trunk/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/recipientListWithStringDelimitedHeader.xml}

In this case, the list of recipients are contained in the header 'myHeader'.

And the same example in Java DSL:

{snippet:id=example|lang=java|url=camel/trunk/camel-core/src/test/java/org/apache/camel/processor/RecipientListWithStringDelimitedHeaderTest.java}

And with a slightly different syntax where you use the builder to the fullest (i.e. avoid using parameters but using stacked operations, notice that header is not a parameter but a stacked method call)

java from("direct:a").recipientList().header("myHeader");

Dependencies

The Header language is part of camel-core.

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