Is it possiable send request to Google and Yahoo API at the same time?

Question

In my project I used Google adwords API and also Yahoo API. I want to send request to two API at same time by using flex.

Is it possible to send request to same time. If not how can I do ?

Answer 1

Since flex is event based, this should be pretty simple. Just create 2 URLRequest objects (I am assuming both APIs are REST-based), and set your GET variables. Create a loadComplete event listener for each of the URLRequest object, and in each of the eventlisteners, write code that processes the results from both APIs.

That should do it.

Answer 2

Not "at the same time," no. For one thing, you've got only one (background) thread to work with, and that thread can only do one thing at a time, so however you write your code, one of the requests will always be initiated first.

If what you're asking is whether you can send out a request to both services in a single call, then the answer is again no (since both will have different URLs, and the ActionScript APIs don't take arrays as URL parameters, they only take strings).

That said, I suppose you could "fake it," so to speak, by having your Flex app call a service you wrote yourself -- e.g., in C# -- and have that service call (synchronously) Google, then Yahoo, then return control back to your Flex app along with a modified result set consisting of whatever happened to come back from Google and Yahoo, respectively.

Unless I'm misunderstanding (or overthinking) the question. ;)

Here's some sample code illustrating one way to handle calling two services -- not concurrently, but one right after the other, using mx.rpc.HTTPService:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="onCreationComplete()">

    <mx:Script>
     <![CDATA[

      import mx.rpc.http.HTTPService;
      import mx.rpc.events.ResultEvent;
      import mx.rpc.events.FaultEvent;

      private function onCreationComplete():void
      {
       callGoogle();
       callYahoo();
      }

      private function callGoogle():void
      {
       var svc:HTTPService = new HTTPService();
       svc.url = "http://api.google.com/someservice.xml";
       svc.addEventListener(ResultEvent.RESULT, onGoogleResult, false, 0, true);
       svc.addEventListener(FaultEvent.FAULT, onGoogleFault, false, 0, true);
       svc.send();
      }

      private function callYahoo():void
      {
       var svc:HTTPService = new HTTPService();
       svc.url = "http://api.yahoo.com/someservice.xml";
       svc.addEventListener(ResultEvent.RESULT, onYahooResult, false, 0, true);
       svc.addEventListener(FaultEvent.FAULT, onYahooFault, false, 0, true);
       svc.send();
      }

      private function onGoogleResult(event:ResultEvent):void
      {
       trace(event.result);
      }

      private function onGoogleFault(event:FaultEvent):void
      {
       trace(event.fault.message);
      }

      private function onYahooResult(event:ResultEvent):void
      {
       trace(event.result);
      }

      private function onYahooFault(event:FaultEvent):void
      {
       trace(event.fault.message);
      }

     ]]>
    </mx:Script>

</mx:Application>

Hope that helps! Post back with comments and I'll keep an eye out.