Check to see if CallResponder is processing
- by Travesty3
I'm using Flash Builder 4.6. As a simple example, say I have the following application:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:sdk="services.sdk.*">
<fx:Script>
<![CDATA[
private function btnGetValue_clickHandler():void
{
getValueResult.token = sdk.getValue();
}
private function getValueResultHandler():void
{
// ...
}
]]>
</fx:Script>
<fx:Declarations>
<sdk:SDK id="sdk" fault="{Alert.show(event.fault.faultString +'\n\n'+ event.fault.faultDetail, 'SDK ERROR');}" showBusyCursor="false"/>
<s:CallResponder id="getValueResult" result="getValueResultHandler()"/>
</fx:Declarations>
<s:Button id="btnGetValue" click="btnGetValue_clickHandler()" label="Get Value" />
</s:Application>
So when you click on the button, it calls a PHP file and when it gets a result, it calls getValueResultHandler(). Easy enough.
But what if the response from the PHP file takes a second or two and the user clicks the button rapidly? Then the result handler function may not get called every time, since the call responder gets a new token before it received the last response.
Is there a standard way of resolving this issue? I came up with the following workaround, and it works fine, but it seems like this issue would be common enough to have a more built-in solution.
My workaround is:
var getValueResultProcessing:Boolean = false;
private function btnGetValue_clickHandler():void
{
var interval:uint = setInterval(function():void
{
if (!getValueResultProcessing)
{
getValueResultProcessing = true;
getValueResult.token = sdk.getValue();
clearInterval(interval);
}
}, 100);
getValueResult.token = sdk.getValue();
}
private function getValueResultHandler():void
{
getValueResultProcessing = false;
// ...
}
Any better way of resolving this issue?
