Setting header with simple

[Bob Jolliffe]

I am trying to set the value of a header in a route like:

...
  <c:log message="${body.get('properties').get('Dhis2UID')}" />
  <c:setHeader headerName="uid"
><c:constant>${body.get('properties').get('Dhis2UID')}</c:constant></c:setHeader>
...

The log message displays the expected value.

But the header is being populated with the literal text
"${body.get('properties').get('Dhis2UID')}".

Any idea what I am doing wrong?

Regards
Bob