From: Daniel Robinson <nelkahn_at_gmail.com>
Date: Wed, 28 Jun 2006 15:53:24 +0200

Hello all,

I have got a simple WebService running. I have successfully called it from
Perl.

I have also sucessfully called it using a java client running in Java 6.

However I now need to get this working in Java 5. I am starting by the
client side of things. This is where I get the NullPointerException. I have
had a look through the source code and am unsur how this could work.

This is the trace I get :

java.lang.NullPointerException
    at com.sun.xml.ws.client.WSServiceDelegate.createEndpointIFBaseProxy(
WSServiceDelegate.java:352)
    at com.sun.xml.ws.client.WSServiceDelegate.getPort(
WSServiceDelegate.java:242)
    at javax.xml.ws.Service.getPort(Service.java:94)
    at
jet.container.managers.webservicesclient.WebServicesClientManager$1.run(
WebServicesClientManager.java:101)
    at java.security.AccessController.doPrivileged(Native Method)
    at
jet.container.managers.webservicesclient.WebServicesClientManager.getWebServiceInstance
(WebServicesClientManager.java:96)
    at
jet.container.managers.webservicesclient.WebServicesClientManager.invoke(
WebServicesClientManager.java:77)
    at jet.container.exchange.AbstractContext.invoke(AbstractContext.java
:300)
    at
jet.container.managers.webservicesclient.WebServicesClientManagerContextImpl.getWebServiceInstance
(WebServicesClientManagerContextImpl.java:28)
    at be.inveo.jet.test.webservices.WebServiceTestNut.run(
WebServiceTestNut.java:92)
    at java.lang.Thread.run(Thread.java:595)


AS you can see the problem starts in the getPort method. This is how things
are called in the client :


    private Object getWebServiceInstance(final Class sei, final URL
wsdlLocation, final String namespaceURI, final String serviceName, final
String portName) throws ConnectException {
        final QName serviceQName = new QName(namespaceURI, serviceName);

        Object obj = null;
        try {
            obj = AccessController.doPrivileged(new
PrivilegedExceptionAction<Object>() {
                public Object run() throws Exception {
                    Service service = Service.create(wsdlLocation,
serviceQName);

                    QName portQName = new QName(namespaceURI, portName);
                    Object proxy = service.getPort(portQName, sei);
                    BindingProvider bp = (BindingProvider) proxy;

                    Map<String, Object> context = bp.getRequestContext();
                    context.put(BindingProvider.SESSION_MAINTAIN_PROPERTY,
Boolean.TRUE);

                    return proxy;
                }
            });
        } catch (PrivilegedActionException pae) {
            Throwable t = pae.getCause();
            if (t instanceof WebServiceException) {
                WebServiceException wse = (WebServiceException) t;
                throw wse;
            }
            if (t instanceof ConnectException) {
                ConnectException ce = (ConnectException) t;
                throw ce;
            }
        }


        return obj;
    }



When I run this through the debugger I can see that the problem is that the
seiContext in the WSServiceDelegate is empty. This is the case as the
addSEI() method is not called in the constructor as the serviceClass ==
Service.class.

It is not clear where I have gone wrong (though I am certain I have gone
wrong somewhere). The NullPointerException is not much help however.

Does anybody with a better understanding of the inner workings of JAX-WS
know what is going on here?

Thank you in advance for any help.

Daniel