How to access parent or wrapper variables from an AS3 Worker Class

Question

I am using Flash Builder 4.7 and have created a Worker Class. Below is the code:

package co.fuix.mobile.system.model
{
    import flash.display.DisplayObjectContainer;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.system.MessageChannel;
    import flash.system.Worker;
    import flash.utils.getDefinitionByName;

    import mx.managers.SystemManager;

    public class InstantMessengerWorker extends Sprite
    {

        private var bm:MessageChannel;
        private var mb:MessageChannel;
        public function InstantMessengerWorker()
        {

            super();

            bm = Worker.current.getSharedProperty("BACK_TO_MAIN_CHANNEL");
            mb = Worker.current.getSharedProperty("MAIN_TO_BACK_CHANNEL");
            mb.addEventListener(Event.CHANNEL_MESSAGE, onMainToBack);

        }

        protected function onMainToBack(event:Event):void
        {
            if(mb.messageAvailable){
                var s:SystemManager;
                trace('*'+mb.receive());
                trace('**'+mb.receive());
                trace('***'+mb.receive());
                trace(mx.core.FlexGlobals.topLevelApplication.myVariable);
            }
        }
    }
}

How do I reference a variable in the main mxml file. I know how to use message channels but I want to get that variable straight.

When I run the above code, this part

trace(mx.core.FlexGlobals.topLevelApplication.myVariable);

is giving me an error.

Any help will be regreatly appreciated

`"is giving me an error"` What error? – Brian Apr 09 '15 at 15:05 — Brian, Apr 09 '15 at 15:05

Jason Reeves · Accepted Answer · 2015-04-09T18:02:58.020

0

You can't access a variable from the main app like that. They are running separately. What you need to do is:

Link to Adobe docs

edited Apr 09 '15 at 18:02

answered Apr 09 '15 at 17:43

Jason Reeves

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Thank you @jason-reeves for your answer. At least I now know how it works. Then is it possible to share the FlexGlobals.topLevelApplication like so `worker.setSharedProperty("FlexGlobalsObject", mx.core.FlexGlobals.topLevelApplication);` in the main SWF. Then in the worker I want to access the property as `flexGlobalsProperty = Worker.current.getSharedProperty("FlexGlobalsObject");`. Basically I want to share the FlexGlobals Object between the swf. – Drmaposa Apr 10 '15 at 14:55
no that won't work. only simple objects can be shared. Basically you have two different flash players running and sending info back and forth either through a message channel or shared properties. This is stateless and one can't see into the other for references... only pass messages back and forth (except ByteArray which is sharable). The link I gave you is the ONLY way to handle communications to workers. – Jason Reeves Apr 10 '15 at 18:14
Thanks Jason. Now I understand. Its only that I started using Workers recently. ;) – Drmaposa Apr 11 '15 at 09:15

How to access parent or wrapper variables from an AS3 Worker Class

1 Answers1