Really, what im looking for, is some way to check if
an object no
longer exists. I thought a weak reference in the dictionary might
work for me, but after 14 hours of inactivity, those weak references
are still there.
Am i misunderstanding the nature of a weak reference? Is there some
other way that I can test to see if a given object still exists?
--- In [EMAIL PROTECTED]ups.com,
"Matt Chotin" <[EMAIL PROTECTED]> wrote:
>
> There's no way to know if garbage collection was forced. Create a
> method does does a for loop that creates 10,000 objects into mid-
air.
>
>
>
> For (var i:int=0; I < 10000; i++)
>
> New Object();
>
>
>
> That should trigger the garbage collector hopefully.
>
>
>
> ________________________________
>
> From: [EMAIL PROTECTED]ups.com
[mailto:[EMAIL PROTECTED]ups.com]
On
> Behalf Of jeff tapper
> Sent: Thursday, July 27, 2006 5:56 AM
> To: [EMAIL PROTECTED]ups.com
> Subject: [flexcoders] Re: Tools for listing objects
>
>
>
> Well, that experiment failed as well. 14 hours later, the same
> objects are still listed in the dictionary.
> Wed Jul 26 17:07:23 GMT-0400 2006
> Testing56:Testing56
> Testing19:Testing19
> Testing38:Testing38
> Thu Jul 27 08:50:31 GMT-0400 2006
> Testing56:Testing56
> Testing19:Testing19
> Testing38:Testing38
>
> Am I misunderstanding the usage of Weak References in the
> Dictionary? Does anyone have any idea how this can be used to keep
> track of what objects exist and which dont?
>
> --- In [EMAIL PROTECTED]ups.com
<mailto:flexcoders%
40yahoogroups.com>
> , "jeff tapper" <jeff@> wrote:
> >
> > Ok, heres a sketch of what im trying now.
> > App.mxml
> > ====
> > <?xml version="1.0" encoding="utf-8"?>
> > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml
> <http://www.adobe.com/2006/mxml>
"
> > layout="vertical" creationComplete="initApp()">
> > <mx:Script>
> > <![CDATA[
> > import mx.managers.PopUpManager;
> > import mx.managers.PopUpManagerChildList;
> > import mx.core.IFlexDisplayObject;
> > private var screenDict:Dictionary;
> > private var scr1:IFlexDisplayObject;
> > private function initApp():void{
> > screenDict = new Dictionary(true);
> > }
> > public function createScreen
> > (parent:DisplayObjectContainer,
> > screen:Class,modal:Boolean=false):IFlexDisplayObject{
> > var s:IFlexDisplayObject =
> > PopUpManager.createPopUp(parent, screen,
> > modal,PopUpManagerChildList.APPLICATION);
> > screenDict[s] = s.name
> > return s;
> > }
> > public function showObjects():void{
> > trace(new Date());
> > for (var i:* in screenDict){
> > trace(i+":"+screenDict[i]);
> > }
> > }
> > public function removeScreen
> > (screen:IFlexDisplayObject):void{
> > PopUpManager.removePopUp(screen);
> > }
> > private function makeScreen():void{
> > if(scr1 == null){
> > scr1 = createScreen
> > (this,Testing,false);
> > }
> > }
> > private function destroyScreen():void{
> > removeScreen(scr1);
> > scr1 = null;
> > }
> >
> > ]]>
> > </mx:Script>
> > <mx:Button click="makeScreen()" label="make"/>
> > <mx:Button click="destroyScreen()" label="kill"/>
> > <mx:Button click="showObjects()" label="show"/>
> > </mx:Application>
> >
> > Testing.mxml
> > =====
> > <?xml version="1.0" encoding="utf-8"?>
> > <mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml
> <http://www.adobe.com/2006/mxml>
" width="400"
> > height="300">
> > <mx:Button click="this.dispatchEvent(new
Event('foo'))"/>
> > </mx:Panel>
> >
> > Now, as i run this, if i click make, kill, make, kill, show, The
> > trace shows:
> > Wed Jul 26 17:07:14 GMT-0400 2006
> > Testing58:Testing58
> > Testing20:Testing20
> > Testing39:Testing39
> >
> > Implying that the screens arent really being destroyed. Perhaps
I
> > didnt wait long enough, so 5 minutes later, I tried the same
> thing,
> > with the same results. Maybe 5 minutes isnt long enough, so I'll
> > leave it running over night and try again in the morning. But,
> the
> > fundemental question is, have i done enough to remove the
> screens?
> > Should the garbage collector clean the unused ones up, or have i
> > somehow left a reference lingering?
> >
> > We have a very complex app, which I want to ensure we clean up
all
> > unused objects, but im having trouble finding a way to verify
they
> > are removed.
> >
>
