void IEventActivity.Subscribe(ActivityExecutionContext parentContext, IActivityEventListener <QueueEventArgs> parentEventHandler)
{
if (parentContext == null)
{
throw new ArgumentNullException("parentContext");
}
if (parentEventHandler == null)
{
throw new ArgumentNullException("parentEventHandler");
}
this.IsInEventActivityMode = true;
base.RaiseEvent(DelayActivity.InitializeTimeoutDurationEvent, this, EventArgs.Empty);
TimeSpan timeSpan = this.TimeoutDuration;
DateTime timeOut = DateTime.UtcNow + timeSpan;
WorkflowQueuingService qService = parentContext.GetService <WorkflowQueuingService>();
IComparable queueName = ((IEventActivity)this).QueueName;
TimerEventSubscription timerSub = new TimerEventSubscription((Guid)queueName, this.WorkflowInstanceId, timeOut);
WorkflowQueue queue = qService.CreateWorkflowQueue(queueName, false);
queue.RegisterForQueueItemAvailable(parentEventHandler, this.QualifiedName);
this.SubscriptionID = timerSub.SubscriptionId;
Activity root = this;
while (root.Parent != null)
{
root = root.Parent;
}
TimerEventSubscriptionCollection timers = (TimerEventSubscriptionCollection)root.GetValue(TimerEventSubscriptionCollection.TimerCollectionProperty);
Debug.Assert(timers != null, "TimerEventSubscriptionCollection on root activity should never be null, but it was");
timers.Add(timerSub);
}
