options.setListenerTransportProtocol(Constants.TRANSPORT_HTTP);
options.setUseSeparateListener(false);
options.setProperty(Constants.Configuration.ENABLE_MTOM, Constants.VALUE_TRUE);
//Blocking invocation
OMElement result = call.invokeBlocking("echo", payload);
StringWriter writer = new StringWriter();
result.serialize(XMLOutputFactory.newInstance()
.createXMLStreamWriter(writer));
writer.flush();