Question

I have a Button that when clicked loads a Flex module in my AIR application. However, occasionally the Module fails to load the first time the button is clicked, but it works the second time it’s clicked. When I debug it in the debugger the READY event is not fired so the remaining logic is never called.

var moduleInfo:IModuleInfo = ModuleManager.getModule(managedModule.url);
moduleInfo.addEventListener(ModuleEvent.READY, function(event:ModuleEvent):void {
    trace("ModuleEvent.READY called.");
});
moduleInfo.addEventListener(ModuleEvent.ERROR, function(event:ModuleEvent):void {
    trace("ModuleEvent.ERROR called.");
});
moduleInfo.addEventListener(ModuleEvent.SETUP, function(event:ModuleEvent):void {
    trace("ModuleEvent.SETUP called.");
});
moduleInfo.addEventListener(ModuleEvent.PROGRESS, function(event:ModuleEvent):void {
    trace("ModuleEvent.PROGRESS called.");
});
moduleInfo.addEventListener(ModuleEvent.UNLOAD, function(event:ModuleEvent):void {
    trace("ModuleEvent.UNLOAD called.");
});
moduleInfo.load(ApplicationDomain.currentDomain);

The ApplicationDomain.currentDomain is needed to fix other issues, but having it there or removing it doesn’t seem to make a difference. Sometimes the modules just doesn’t load. The output is roughly as follows:

[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.PROGRESS called.
[SWF] MyStupidModule.swf – 342,932 bytes after decompression
[trace] ModuleEvent.SETUP called.
[trace] ModuleEvent.PROGRESS called.

Notice READY is never called, and neither is ERROR. If I click the button again here is what is printed out:

[trace] ModuleEvent.SETUP called.
[trace] ModuleEvent.PROGRESS called.
[trace] ModuleEvent.READY called.

Any clues what could be causing this? We are using Flex 3.6.0 AIR 2.6.019

Answer 1

Store reference somewhere in the owner class to the ModuleInfoProxy (IModuleInfo) – the instance that ModuleManager.getModule() returns for you, for example

class MyMainClass
{
           private var moduleInfo:IModuleInfo;
           public function load():void
           {
                 moduleInfo = ModuleManager.getModule("SimpleModule.swf");
                 ...
           }    
}

ModuleInfoProxy uses weak reference events and GC can remove it completely with event handlers if the object has no more reference to it. Storing a reference to IModuleInfo in a local variable makes that object eligible for GC once the load() method exits. If that happens before the module has fully loaded your listeners wouldn’t be called back.