Enthuware

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1.2 Async Callback

    //async callback Method
    public Future<?> addNumbers(int number1, int number2, AsyncHandler<AddNumbersResponse>);

Here the client application provides an AsyncHandler by implementing the javax.xml.ws.AsyncHandler<T> interface.

    /**
     *
     * Async callback handler
     */
    class AddNumbersCallbackHandler implements AsyncHandler<AddNumbersResponse> {
        private AddNumbersResponse output;
        /*
         *
         * @see javax.xml.ws.AsyncHandler#handleResponse(javax.xml.ws.Response)
         */
        public void handleResponse(Response<AddNumbersResponse> response) {
            try {
                output = response.get();
            } catch (ExecutionException e) {
                e.printStackTrace();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        AddNumbersResponse getResponse(){
            return output;
        }
    }

The async handler is then passed as the last parameter of the async callback method:

    //instantiates the callback handler
    AddNumbersCallbackHandler callbackHandler = new AddNumbersCallbackHandler();

    //invoke the async callback method
    Future<?> resp = port.addNumbersAsync(number1, number2, callbackHandler);
    while(!resp.isDone()){
           //do something
    }
    System.out.println("The sum is: " + callbackHandler.getResponse().getReturn());