Flex 3 Dynamic RemoteObject Class

Question

I have a class which I want to use throughout my projects. It essentially would allow me to easily work with a RemoteObject so that I don't have to define it throughout all of my projects. It works when not passing "args" to sendRequest(..). But when I want to call the cfc function with parameters and try passing "args" in I get the following error:

The parameter USERNAME to function getAllPreferences is required but was not passed in.

Heres my code:

package Actionscript
{
    import mx.collections.ArrayCollection;
    import mx.rpc.AbstractOperation;
    import mx.rpc.events.FaultEvent;
    import mx.rpc.events.ResultEvent;
    import mx.rpc.remoting.mxml.RemoteObject;

    public class CFCRemote
    {
     private var ro:RemoteObject;
     private var roSource:ArrayCollection;
     private var appPointer:Object;

     // constructor
     public function CFCRemote(appMain:Object):void
     {
      appPointer = appMain;
      roSource = new ArrayCollection();
     }

     public function addSource(alias:String, source:String, thisObj:Object):void
     {
      roSource.addItem({alias:alias, source:source, thisObj:thisObj});
     }

     public function sendRequest(roAlias:String, funcName:String, args:Object = null):void
     {
      var roCaller:Object;

      ro = new RemoteObject("ColdFusion");
      ro.showBusyCursor = true;   

      for(var i:int = 0; i < roSource.length; i++)
      {
       if(roSource.getItemAt(i).alias == roAlias)
       {
        ro.source = roSource.getItemAt(i).source;
        roCaller = roSource.getItemAt(i).thisObj;
        break;
       }
      }

      var ao:AbstractOperation = ro.getOperation(funcName);
      ao.arguments = args;
      ao.addEventListener(ResultEvent.RESULT, function(e:ResultEvent):void{roCaller.handleROF(e,funcName)});
      ao.addEventListener(FaultEvent.FAULT, function(e:FaultEvent):void{appPointer.server_fault(e,funcName,"unknown")});
      ao.send();

     }
    }
}

When I trace(args.username) I see that its passed in correctly. I tried this in another script, however, the RemoteObject in that script was defined in with mxml. I don't see how this would be much different.

Running out of ideas :(

Edit: It's working for us now, if anyone wants to use this solution and is having a problem implementing this class I'll gladly help

Answer 1

Well I can't say I know Flex terribly well, but the fact that you're instantiating an abstract class does throw up some red flags for me. Usually you never directly instantiate abstract classes - instead they are used as base classes for the classes you actually do instantiate.

In this case I think you are looking for the Operation class. If that's the case then you may also need to provide it with an "argumentNames" array - this seems to provide the order in which your arguments should be passed.

Answer 2

Trying passing the arguments to AbstractOperation.send() rather than setting them on the AbstractOperation. I haven't tried the latter before but I've passed them to the send() method more times that I can count without problems. You may want to consider passing the args using "... args" or as an Array/ArrayCollection to ensure you maintain the order.

Answer 3

hellow,

i dont speak de english language, but....

do you have an use example of this class?

i have problems to send the object of arguments to my method at php backend.

thanks