Header

Since Camel 1.5

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

Header Options

The Header language supports 1 options, which are listed below.

Name Default Java Type Description

Name	Default	Java Type	Description
trim	`true`	`Boolean`	Whether to trim the value to remove leading and trailing whitespaces and line breaks

trim

true

Boolean

Whether to trim the value to remove leading and trailing whitespaces and line breaks

Example usage

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

      <route>
        <from uri="direct:a" />
        <recipientList>
          <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.