Re: asynchronous call back for client side method

void asyncMethod(final Callback<SuccessType, FailureType> callback) {

   //Some async work, could also be a simple Timer task or similar that only runs on the client.

   rpcservice.getData(new AsyncCallback<String, Throwable> {

      void onSuccess(String result) {

        //Do what you need to do

        ....

        if(callback != null) { callback.onSuccess(..); } //notify caller via callback

      }

      void onFailure(Throwable cause) {

        //Do what you need to do

        ....

        if(callback != null) { callback.onFailure(..); } //notify caller via callback

      }

   }

}

void otherMethod() {

   asyncMethod(new Callback<SuccessType, FailureType>() {

      //implement what you want to do when asyncMethod returns and calls the callback.

   });

}

SuccessType and FailureType can by anything including Void if you don't care about information and just want to be notified.

-- J.

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