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<route>
  <from uri="direct:start"/>
  <toD uri="${header.foo}"/>
</route>

And in Java DSL

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<route>
  <from uri="direct:start"/>
  <toD uri="mock:${header.foo}"/>
</route>

And in Java DSL

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You can also use other languages that  than Simple such as XPath - this requires to prefix with language: as shown below (simple language is the default language). If you do not specify language: then the endpoint is a component name. And in some cases there is both a component and language with the same name such as xquery.

<route>
  <from uri="direct:start"/>
  <toD uri="language:xpath:/order/@uri"/>
</route>

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from("direct:start")
  .toD("language:xpath:/order/@uri");

You can also concat multiple Language(s) together using the plus sign + such as shown below:

<route>
  <from uri="direct:start"/>
  <toD uri="jms:${header.base}+language:xpath:/order/@id"/>
</route>

...

from("direct:start")
  .toD("jms:${header.base}+language:xpath:/order/@id");

You can concat as many languages as you want, just separate them with the plus sign

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