Yes I tried. I think that does not work. Instead, there is another approach that worked.

I wrote a custom processor as below: Improvements are required which I am yet to do

public class RSResponseProcessor implements Processor {

@Override

public void process(Exchange exchange) throws Exception {

Message message = exchange.getIn();

        Response response = convertToJaxRs(message);

        exchange.getIn().setBody(response);

        exchange.getIn().setHeader("Test", "Won't work unless DefaultCxfRsBinding is not replaced with a custom one");

}

private Response convertToJaxRs(Message message)

    {

       // ResponseBuilder jaxrsResponseBuilder = Response.ok(message.getBody(), MediaType.APPLICATION_JSON);

ResponseBuilder jaxrsResponseBuilder = Response.status(400);

jaxrsResponseBuilder.entity(" { \"message\" : \"There was a problem with the incoming message\" }");

jaxrsResponseBuilder.type(MediaType.APPLICATION_JSON);

//Response.

//jaxrsResponseBuilder.

       // jaxrsResponseBuilder.header("header1", "you'll see this");

        Response response = jaxrsResponseBuilder.build();

        return response;

    }

}