String address = "http://localhost:" + CB_PORT + "/CallbackContext/CallbackPort";
Endpoint ep = Endpoint.publish(address, implementor);
URL wsdlURL = getClass().getResource("/wsdl/basic_callback_test.wsdl");
SOAPService ss = new SOAPService(wsdlURL, SERVICE_NAME);
ServerPortType port = ss.getPort(PORT_NAME, ServerPortType.class);
updateAddressPort(port, PORT);
EndpointReference w3cEpr = ep.getEndpointReference();
String resp = port.registerCallback((W3CEndpointReference)w3cEpr);