[CONF] Apache Camel: Header (page edited)

Fri, 30 Jan 2009 10:35:32 -0800

Page Edited : CAMEL : Header

Header has been edited by Jonathan Anstey (Jan 30, 2009).

Change summary:

Use wiki snippets instead of hardcodes

(View changes)

Content:

Header _expression_ Language

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

Available as of Camel 1.5

Example usage

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

<route>
  <from uri="direct:a" />
  <!-- use comma as a delimiter for String based values -->
  <recipientList delimiter=",">
    <header>myHeader</header>
  </recipientList>
</route>


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



And the same example in Java DSL:





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





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)




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





Dependencies


The Header language is part of camel-core.

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