Callback not working on a non-blocking invocation

[Eu Expat]

Hi,

I'm following the example here : Axis2 - advanced user guide to work through creating web services in Java/Axis.

I have cloned the code on the blocking example to use my classes and it works fine. When I try to do the non-blocking invocation, the code compiles and runs but I do not get the response printed to the screen. In fact, I don't even get the string "test:" in the output window. Can someone give me a pointer in the right direction please? Much appreciated.

The function DoSomethingSimple takes the two integer attributes in the object and adds them together returning the integer result.

Not sure what else you may want, so I'll just list the function code here, let me know if you want anything else...

    
    //// WORKING
    public static void DoBlocking() throws AxisFault {

        // initialise the stub class
        try {
            OperationsStub stub = new OperationsStub(null, "http://localhost:8080/axis2/services/Operations");

            // create the request
            DoSomethingSimple request = new DoSomethingSimple();
            SimpleObject obj1 = new SimpleObject();
            obj1.setX(3);
            obj1.setY(3);
            request.setObj1(obj1);

            // invoke the web service

            DoSomethingSimpleResponse response = stub.doSomethingSimple(request);
            System.out.println(String.valueOf(response.get_return()));

        } catch (java.rmi.RemoteException e) {
            e.printStackTrace();

        }

    }

    //// NOT WORKING
    public static void DoNonBlocking() throws AxisFault {
        try {
            OperationsStub stub = new OperationsStub(null, "http://localhost:8080/axis2/services/Operations");

            // implementing the callback
            OperationsCallbackHandler callback = new OperationsCallbackHandler() {
                public void receiveResultdoSomethingSimple(axisobject.OperationsStub.DoSomethingSimpleResponse result){
                    System.out.println("test: " + result.get_return());
                }
            };

            // create the request
            DoSomethingSimple request = new DoSomethingSimple();
            SimpleObject obj1 = new SimpleObject();
            obj1.setX(3);
            obj1.setY(3);
            request.setObj1(obj1);

            //start the asynchronous call...
            stub.startdoSomethingSimple(request, callback);
            //System.out.println("This should appear before the result...");
        }
        catch (java.rmi.RemoteException e) {
            e.printStackTrace();
        }
    }