How to handle calls to multiple functions in the same web service?

This is a super newbie question on Flex. While I am a seasoned programmer, this is my first ever Flex application; please bear with me for my Flex codes.

I have a web service written in ColdFusion. In this web service, there are two functions; one is to return all the questions in a quiz and the other one is to return all the answer selections to the questions in a quiz.

            [Bindable]
        private var questionArray:ArrayCollection;
        private var cfquiz:RemoteObject;

        private function loadQuestions():void {
            currentQuestionCounter = 0;
            btnPrev.enabled = false;
            btnNext.enabled = false;
            cfquiz = new RemoteObject("ColdFusion");
            c开发者_如何学Cfquiz.source = "CFCertExam.cfquiz";
            cfquiz.addEventListener(ResultEvent.RESULT, resultHandler);
        }

        private function resultHandler(event:ResultEvent):void {
            questionArray = event.result as ArrayCollection;

            txt1Questions.htmlText = questionArray.getItemAt(currentQuestionCounter).Question_Text;
            btnNext.enabled = true;
        }

I have the codes above. loadQuestions is called at creationComplete to retrieve the questions. Things are working fine. What I want to do is to call another function within the same web service, returnAnswers, to return the answer options for a question. Since I have cfquiz associated to the web service already, I was using cfquiz to call returnAnswers. However, there is an event listener associated to cfquiz already, resultHandler is being called when returnAnswers comes back with the results.

My questions are, first, is it possible to check which function returns the results within resultHandler? If so, how? And second, what is the best way to handle calls to multiple functions within the same web service?

Thanks in advance, Monte

Yes you can. You need to specify a handler function for each method which in turn calls a different webservice.

The better way to do this is using AsyncToken and AsyncResponder instead of addEventListener, as following code.

tokenA = cfquiz.methodA();
tokenA.addResponder(new AsyncResponder(onResultForMethodA, onFaultMethodA));

tokenB = cfquiz.methodA();
tokenB.addResponder(new AsyncResponder(onResultForMethodB, onFaultMethodB));

tokenC = cfquiz.methodA();
tokenC.addResponder(new AsyncResponder(onResultForMethodC, onFaultMethodC));

or

tokenA = cfquiz.methodA();
var responderA:IResponder = new AsyncResponder(onResult, onFault, "methodA");
tokenB = cfquiz.methodB();
var responderB:IResponder = new AsyncResponder(onResult, onFault, "methodB");

tokenA.addResponder(responderA);
tokenB.addResponder(responderB);


private function onResult(evt:ResultEvent, token:Object):void {
   if(token == "methodA" ) {
     //logic for methodA
   }
   if(token == "methodB" ) {
     //logic for methodB
   }
}

I'm a little confused as I can't see where you are calling the actual web service function, for example from these examples, I am expecting to see:

cfquiz = new RemoteObject("ColdFusion");
cfquiz.source = "CFCertExam.cfquiz";
cfquiz.addEventListener(ResultEvent.RESULT, resultHandler);
cfquiz.myCFCFunctionCall(); /* where is this? */

Anyway, AFAIK you can create a new instance of the remote object and set that up to have it's own event listener.

Hope that helps.