private void updatePO() {
        Service service = Service.create(qname);
        service.addPort(qname, HTTPBinding.HTTP_BINDING, url);
        Dispatch<Source> dispatcher = service.createDispatch(qname, Source.class,
                                             Service.Mode.MESSAGE);
        Map<String, Object> requestContext = dispatcher.getRequestContext();
        requestContext.put(MessageContext.HTTP_REQUEST_METHOD, "PUT");
        Source result = dispatcher.invoke(new StreamSource(new StringReader(poXML)));
        printSource(result);
    }