svc.addPort(portName, null, url);
Dispatch<Source> dispatch = svc.createDispatch(portName, Source.class, Service.Mode.PAYLOAD);
//Create JAXBContext and JAXBSource here.
ObjectFactory factory = new ObjectFactory();
Invoke invokeObj = factory.createInvoke();
invokeObj.setInvokeStr("Some Request");
JAXBContext ctx = JAXBContext.newInstance("org.test.dispatch.jaxbsource");
JAXBSource jbSrc = new JAXBSource(ctx.createMarshaller(), invokeObj);
// Invoke the Dispatch