QName portName = new QName(targetNS, "PingEndpointPort");
Service service = Service.create(wsdlURL, serviceName);
Dispatch dispatch = service.createDispatch(portName, Source.class, Mode.PAYLOAD);
String payload = "<ns1:ping xmlns:ns1='http://oneway.samples.jaxws.ws.test.jboss.org/'/>";
dispatch.invokeOneWay(new StreamSource(new StringReader(payload)));
payload = "<ns1:feedback xmlns:ns1='http://oneway.samples.jaxws.ws.test.jboss.org/'/>";
Source retObj = (Source)dispatch.invoke(new StreamSource(new StringReader(payload)));
Element docElement = DOMUtils.sourceToElement(retObj);