Flash / Flex / ActionScript: Using IResponder instead of EventListeners

Using addEventListener is a popular way of of waiting for a response from a server. I've run into issues using this when a server returns the same response for all methods. Many of the listener methods are tripped for the wrong response. The easy way to avoid this is to use an IResponder.

Here is an example using the HTTPService object. You should be able to use the same steps on a method that returns an AsyncToken.

var asyncToken:AsyncToken;
var internalIResponder:IResponder;
...
asyncToken = _httpService.send();
internalIResponder = new AsyncResponder(onHTTPServiceSuccess, onHTTPServiceFault, asyncToken);
asyncToken.addResponder(internalIResponder);

When send is called it will return an AsyncToken. We can attach an IResponder object to the AsyncToken that will handle the success and fail cases for the response.