Hello,
I was curious if anyone had any clarification on how Flash AS3 deals with threads? I noticed the following code in the View, and I wasn't sure if it was left for compatability with other more concurrent languages (Java,C,etc)
Could anyone give an example where the notifiers might be modified during the notification loop?
PureMVC_AS3_2_0_4
[org/puremvc/as3/core/View.as]
{{{
96 : /**
97 : * Notify the <code>IObservers</code> for a particular <code>INotification</code>.
98 : *
99 : * <P>
100 : * All previously attached <code>IObservers</code> for this <code>INotification</code>'s
101 : * list are notified and are passed a reference to the <code>INotification</code> in
102 : * the order in which they were registered.</P>
103 : *
104 : * @param notification the <code>INotification</code> to notify <code>IObservers</code> of.
105 : */
106 : public function notifyObservers( notification:INotification ) : void
107 : {
108 : if( observerMap[ notification.getName() ] != null ) {
109 :
110 : // Get a reference to the observers list for this notification name
111 : var observers_ref:Array = observerMap[ notification.getName() ] as Array;
112 :
113 : // Copy observers from reference array to working array,
114 : // since the reference array may change during the notification loop
115 : var observers:Array = new Array();
116 : var observer:IObserver;
117 : for (var i:Number = 0; i < observers_ref.length; i++) {
118 : observer = observers_ref[ i ] as IObserver;
119 : observers.push( observer );
120 : }
121 :
122 : // Notify Observers from the working array
123 : for (i = 0; i < observers.length; i++) {
124 : observer = observers[ i ] as IObserver;
125 : observer.notifyObserver( notification );
126 : }
127 : }
128 : }
}}}
Also, if such a thing could occur, what thoughts did anyone have on using a more of an optimistic approach to the notification list - such as immutables (since it seems like it might not change nearly as often as notifications will be thrown).
thanks,
Paul
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