Camel-jetty component : use of available options - apache-camel

Question

I am using the recipientList tag in my route as shown below. The bean findCallbackUrl will return a String which is my destination address. i.e i will be making a POST request to this endpoint . For example i may have a server listening at http://localhost:8080/acceptcallbacks .
<recipientList>
<method ref="findCallbackUrl"/>
</recipientList>
So when the String(destination) returned from the findCallbackUrl bean is jetty:http://localhost:8080/acceptcallback , the POST works fine.
However when some of the option mentioned in the Camel-jetty component are used so issues are seen. when the destination returned is jetty:http://localhost:8080/acceptcallbacks?enableJmx=false or jetty:http://localhost:8080/acceptcallbacks?disableStreamCache=false the POST works fine. However if the returned string is jetty:http://localhost:8080/acceptcallbacks?chunked=false , the call becomes a GET request .
Not sure what is happening here. If the Camel-jetty options are not to be used in the way they have been used above , for options enableJmx or disableStreamCache or some other options , the resulting destination URL should have been http://localhost:8080/acceptcallbacks?enableJmx=false which is a GET request.
Can chunked=false be used for producer as well as consumer endpoints or is it only for consumer endpoint?

Answer 1

Selection of http method in jetty depends on In Body of camel exchange, or on CamelHttpMethod header.
Look at source code of class org.apache.camel.component.http.helper.HttpHelper, method createMethod:
public static HttpMethods createMethod(Exchange exchange, HttpEndpoint endpoint, boolean hasPayload) throws URISyntaxException {
// compute what method to use either GET or POST
HttpMethods answer;
HttpMethods m = exchange.getIn().getHeader(Exchange.HTTP_METHOD, HttpMethods.class);
if (m != null) {
// always use what end-user provides in a header
answer = m;
} else if (hasPayload) {
// use POST if we have payload
answer = HttpMethods.POST;
} else {
// fallback to GET
answer = HttpMethods.GET;
}
return answer;
}
Now look at the call of this method in class org.apache.camel.component.jetty.JettyHttpProducer:
HttpMethods methodToUse = HttpHelper.createMethod(exchange, getEndpoint(), exchange.getIn().getBody() != null);
IMHO options don't matter. Check exchange.getIn().getBody() before request to HTTP, or you can reset header CamelHttpMethod.