[CONF] Apache Camel: Constant (page edited)

Tue, 21 Oct 2008 08:25:32 -0700

Page Edited : CAMEL : Constant

Constant has been edited by James Strachan (Oct 21, 2008).

(View changes)

Content:

Constant _expression_ Language

The Constant _expression_ Language is really just a way to specify constant strings as a type of _expression_.

Available as of Camel 1.5

Example usage

The setHeader element of the Spring DSL can utilize a constant _expression_ like:

<route>
  <from uri="seda:a"/>
  <setHeader headerName="theHeader">
    <constant>the value</constant>        
  </setHeader>
  <to uri="mock:b"/>     
</route>

in this case, the Message coming from the seda:a Endpoint will have 'theHeader' header set to the constant value 'the value'.



And the same example using Java DSL:




from("seda:a").setHeader("theHeader", constant("the value")).to("mock:b");





Dependencies


The Constant language is part of camel-core.

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