protected void RaiseEvents(Queue deQueue)
{
if ((deQueue != null) && (deQueue.Count > 0))
{
DelayedEvent de = null;
while (deQueue.Count > 0)
{
de = deQueue.Dequeue() as DelayedEvent;
switch (de.Args.ChangeType)
{
case WatcherChangeTypes.Changed:
this.OnChanged(de.Args);
break;
case WatcherChangeTypes.Created:
this.OnCreated(de.Args);
break;
case WatcherChangeTypes.Deleted:
this.OnDeleted(de.Args);
break;
case WatcherChangeTypes.Renamed:
this.OnRenamed(de.Args as RenamedEventArgs);
break;
}
}
}
}
private void ElapsedEventHandler(Object sender, ElapsedEventArgs e)
{
// We don't fire the events inside the lock. We will queue them here until
// the code exits the locks.
Queue eventsToBeFired = null;
if (System.Threading.Monitor.TryEnter(this._enterThread))
{
// Only one thread at a time is processing the events
try
{
eventsToBeFired = new Queue(32);
// Lock the collection while processing the events
lock (this._events.SyncRoot)
{
DelayedEvent current = null;
for (int i = 0; i < this._events.Count; i++)
{
current = this._events[i] as DelayedEvent;
if (current.Delayed)
{
// This event has been delayed already so we can fire it
// We just need to remove any duplicates
for (int j = i + 1; j < this._events.Count; j++)
{
if (current.IsDuplicate(this._events[j]))
{
// Removing later duplicates
this._events.RemoveAt(j);
j--; // Don't skip next event
}
}
// Add the event to the list of events to be fired
eventsToBeFired.Enqueue(current);
// Remove it from the current list
this._events.RemoveAt(i);
i--; // Don't skip next event
}
else
{
// This event was not delayed yet, so we will delay processing
// this event for at least one timer interval
current.Delayed = true;
}
}
}
}
finally
{
System.Threading.Monitor.Exit(this._enterThread);
}
}
// else - this timer event was skipped, processing will happen during the next timer event
// Now fire all the events if any events are in eventsToBeFired
this.RaiseEvents(eventsToBeFired);
}