[nOobCrafter]

	public class UserData extends EventDispatcher
	{
//- PRIVATE & PROTECTED VARIABLES -------------------------------------------------------------------------
		private static var _instance			:UserData;						// он диспатчит события об обновлении
....
 
//- CONSTRUCTOR	-------------------------------------------------------------------------------------------
		public function UserData() 
		{
			_instance 		= this;
		}
 
//- PUBLIC & INTERNAL METHODS -----------------------------------------------------------------------------
		public static function addEventListener($eventType:String, $handler:Function, $useCapture:Boolean = false, $priority:int = 0, $useWeakReference:Boolean = true):void
		{
			_instance.addEventListener($eventType, $handler, $useCapture, $priority, $useWeakReference);
		}
 
		public static function removeEventListener($eventType:String, $handler:Function, $useCapture:Boolean = false) : void
		{
			_instance.removeEventListener($eventType, $handler, $useCapture);
		}
 
		public function updateArmy($data:Array):void  
		{
....
				if (UserData._instance)
					UserData._instance.dispatchEvent(new Event(UserData.UPDATE_ARMY));
				return;
		}

что то типа такого, только 1 раз надо будет вызвать конструктор.