Creating application specific log in the Flex program

You can create application specific log in your flex application like this. In my case i am initializing myLogger in the initLogger() method at the time of document creation and once the logger is initialized we can write something at debug level by calling myLogger.debug() method.

Similar to debug there are methods to indicate log statement at different levels, same as that of log4j.


<?xml version="1.0"?>
<!-- logging/ButtonLifeCycle.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
creationComplete='initLogging()'>
  <mx:Script><![CDATA[
    import mx.controls.Alert;
    import mx.logging.ILogger;
    import mx.logging.Log;
    import mx.logging.LogEventLevel;
    import mx.logging.targets.TraceTarget;
    import mx.rpc.events.FaultEvent;
    import mx.rpc.events.ResultEvent;
    import mx.rpc.http.HTTPService;
    
    private var myLogger:ILogger;
    private function initLogging():void {
      var logTarget:TraceTarget = new TraceTarget();
      logTarget.filters=["MyCustomClass"];
      logTarget.level = LogEventLevel.ALL;
      Log.addTarget(logTarget); 
      myLogger = Log.getLogger("MyCustomClass");
    }

    private function traceClick():void {
      myLogger.debug("Entering traceClick");
      useHttpService("http://www.google.com");
      myLogger.debug("Exiting traceClick");
    }
    
    private var service:HTTPService
    public function useHttpService(url:String):void {
      myLogger.debug("Entering useHttpService");
      service = new HTTPService();
      service.url = url;
      service.resultFormat = HTTPService.RESULT_FORMAT_TEXT;
      service.method = "GET";
      service.addEventListener("result", httpResult);
      service.addEventListener("fault", httpFault);
      service.send(parameters);
      myLogger.debug("Entering useHttpService");
    }
    public function httpResult(event:ResultEvent):void {
      myLogger.debug("Entering httpResult");
      var result:Object = event.result;
      Alert.show(event.result.toString());
      myLogger.debug("Entering httpResult");
    }
    public function httpFault(event:FaultEvent):void {
      myLogger.debug("Entering httpFault");
      var faultstring:String = event.fault.faultString;
      Alert.show(faultstring + event.fault.faultDetail + event.fault.rootCause);
      myLogger.debug("Entering httpFault");
    }
  ]]></mx:Script>
  <mx:Button id="b1" label="Click Me" click="traceClick()" />
</mx:Application>

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