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I' trying to isolate a webservice in its own class, and I plan to add separate classes to each webmethod there is in the webservice. So far, this is what I've got. And it works, I have this feeling tickling that I've missed something. (Except for the invisible variable declarations down here, I didn't want to clog the page).

The following is my webservice instatiation class and its fault handler.

 public class CfdWS

            private var model:ModelLocator = ModelLocator.getInstance();

            public function loadWebService():WebService{
                var webService : WebService = new WebService();
                webService.wsdl = model.configXML.cfdwsWSDL;
                webService.addEventListener(FaultEvent.FAULT, onWebServiceFault);
                return webService;

            private function onWebServiceFault(event:FaultEvent):void{
                var fault: Fault = event.fault;
                var message:String = "\ncodigo: " + fault.faultCode;
                message += "\nDetalle: " + fault.faultDetail;
                Alert.show("Error de webservice:" + message);

The following is my webservice method call class. I have written only what I think is the essential code for the question.

public class GeneratePDF extends CfdWS{

    public function generatePDF():void{
                webService = loadWebService();
                webService.addEventListener(LoadEvent.LOAD, doGeneratePDF);
            private function doGeneratePDF(event:LoadEvent):void{
                webService.generatePDF.addEventListener(ResultEvent.RESULT, generatePDFResultHandler);
            private function generatePDFResultHandler (event:ResultEvent):void{
                // After getting what I want, I remove the event listeners here.

Please don't murder me. This is my first attempt at "good practices" I've ever tried.

I'm trying to re-write an application that is already in production while on testing phase. Testing for the next version I mean.

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1 Answer 1

I don't see why would you put every method of the service in a separate class. A "method" is a function of the class. I imagine you wanted to decouple your code, but doing it this way you will force a lot of overhead:

  • the service is instantiated for every 'method' called, and then, hopefully, garbage collected (as you remove event listeners and there's no more references to the service left)
  • because of above, the service is stateless; with time you may want to add some functionality like caching, but you'd need to change whole code structure for that
  • CfdWS - not descriptive name; your way of decoupling code will force you to make three or even five times more classes then you normally would, so I would expect a hell on the file-naming level
  • really, dividing to so many classes is not a good idea - you don't want to switch between files all the time; try to put related code in one Class, and if it grows big, create some helper classes

I think you already understand the benefit of a good MVC implementation, try Robotlegs, it really makes a life easier: http://www.robotlegs.org/

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