protected sealed override void OnActivityChangeRemove(ActivityExecutionContext executionContext, Activity removedActivity)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (removedActivity == null)
{
throw new ArgumentNullException("removedActivity");
}
ListenActivity activity = executionContext.Activity as ListenActivity;
if (((activity.ExecutionStatus == ActivityExecutionStatus.Executing) && (activity.ActivityState != null)) && !activity.IsListenTrigerred)
{
EventDrivenActivity activity2 = removedActivity as EventDrivenActivity;
for (int i = 0; i < activity.ActivityState.Count; i++)
{
ListenEventActivitySubscriber parentEventHandler = activity.ActivityState[i];
if (parentEventHandler.eventDrivenActivity.QualifiedName.Equals(activity2.QualifiedName))
{
activity2.EventActivity.Unsubscribe(executionContext, parentEventHandler);
activity.ActivityState.RemoveAt(i);
return;
}
}
}
else if (this.IsListenTrigerred && (removedActivity.ExecutionStatus == ActivityExecutionStatus.Closed))
{
this.activeBranchRemoved = true;
}
}
protected override sealed void OnActivityChangeRemove(ActivityExecutionContext executionContext, Activity removedActivity)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (removedActivity == null)
{
throw new ArgumentNullException("removedActivity");
}
ListenActivity listen = executionContext.Activity as ListenActivity;
if (listen.ExecutionStatus == ActivityExecutionStatus.Executing && listen.ActivityState != null && !listen.IsListenTrigerred)
{
EventDrivenActivity eda = removedActivity as EventDrivenActivity;
for (int i = 0; i < listen.ActivityState.Count; ++i)
{
ListenEventActivitySubscriber listenEventSubscriber = listen.ActivityState[i];
if (listenEventSubscriber.eventDrivenActivity.QualifiedName.Equals(eda.QualifiedName))
{
eda.EventActivity.Unsubscribe(executionContext, listenEventSubscriber);
listen.ActivityState.RemoveAt(i);
return;
}
}
}
else if (this.IsListenTrigerred && removedActivity.ExecutionStatus == ActivityExecutionStatus.Closed)
{
activeBranchRemoved = true;
}
}
protected override ActivityExecutionStatus Cancel(ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (this.ActivityState == null)
{
return(ActivityExecutionStatus.Closed);
}
try
{
if (this.IsListenTrigerred)
{
//We need to cancel the active running branch
for (int i = 0; i < this.EnabledActivities.Count; ++i)
{
EventDrivenActivity eventDriven = this.EnabledActivities[i] as EventDrivenActivity;
if (eventDriven.ExecutionStatus == ActivityExecutionStatus.Executing)
{
executionContext.CancelActivity(eventDriven);
return(ActivityExecutionStatus.Canceling);
} //If the branch is faulting let it close.
else if (eventDriven.ExecutionStatus == ActivityExecutionStatus.Faulting)
{
return(ActivityExecutionStatus.Canceling);
}
}
}
else
{
//Everything is passive. Lets unsubscribe all and close.
for (int i = 0; i < this.ActivityState.Count; ++i)
{
EventDrivenActivity eventDrivenChild = this.EnabledActivities[i] as EventDrivenActivity;
ListenEventActivitySubscriber eventActivitySubscriber = this.ActivityState[i];
eventDrivenChild.EventActivity.Unsubscribe(executionContext, eventActivitySubscriber);
}
}
}
finally
{
// We null out ActivityState in the finally block to ensure that if
// eventDrivenChild.EventActivity.Unsubscribe above throws then the
// Cancel method does not get called repeatedly.
this.ActivityState = null;
}
return(ActivityExecutionStatus.Closed);
}
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
List <ListenEventActivitySubscriber> list = new List <ListenEventActivitySubscriber>();
this.ActivityState = list;
for (int i = 0; i < base.EnabledActivities.Count; i++)
{
EventDrivenActivity eventDriven = base.EnabledActivities[i] as EventDrivenActivity;
ListenEventActivitySubscriber parentEventHandler = new ListenEventActivitySubscriber(eventDriven);
eventDriven.EventActivity.Subscribe(executionContext, parentEventHandler);
list.Add(parentEventHandler);
}
return(ActivityExecutionStatus.Executing);
}
protected override ActivityExecutionStatus Cancel(ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (this.ActivityState != null)
{
try
{
if (this.IsListenTrigerred)
{
for (int i = 0; i < base.EnabledActivities.Count; i++)
{
EventDrivenActivity activity = base.EnabledActivities[i] as EventDrivenActivity;
if (activity.ExecutionStatus == ActivityExecutionStatus.Executing)
{
executionContext.CancelActivity(activity);
return(ActivityExecutionStatus.Canceling);
}
if (activity.ExecutionStatus == ActivityExecutionStatus.Faulting)
{
return(ActivityExecutionStatus.Canceling);
}
}
}
else
{
for (int j = 0; j < this.ActivityState.Count; j++)
{
EventDrivenActivity activity2 = base.EnabledActivities[j] as EventDrivenActivity;
ListenEventActivitySubscriber parentEventHandler = this.ActivityState[j];
activity2.EventActivity.Unsubscribe(executionContext, parentEventHandler);
}
}
}
finally
{
this.ActivityState = null;
}
}
return(ActivityExecutionStatus.Closed);
}
protected sealed override void OnActivityChangeAdd(ActivityExecutionContext executionContext, Activity addedActivity)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (addedActivity == null)
{
throw new ArgumentNullException("addedActivity");
}
ListenActivity activity = executionContext.Activity as ListenActivity;
if (((activity.ExecutionStatus == ActivityExecutionStatus.Executing) && (activity.ActivityState != null)) && !activity.IsListenTrigerred)
{
EventDrivenActivity eventDriven = addedActivity as EventDrivenActivity;
ListenEventActivitySubscriber parentEventHandler = new ListenEventActivitySubscriber(eventDriven);
eventDriven.EventActivity.Subscribe(executionContext, parentEventHandler);
activity.ActivityState.Insert(activity.EnabledActivities.IndexOf(addedActivity), parentEventHandler);
}
}
void IActivityEventListener <QueueEventArgs> .OnEvent(object sender, QueueEventArgs e)
{
if (sender == null)
{
throw new ArgumentNullException("sender");
}
if (e == null)
{
throw new ArgumentNullException("e");
}
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context == null)
{
throw new ArgumentException(SR.Error_SenderMustBeActivityExecutionContext, "sender");
}
ListenActivity parentActivity = context.Activity as ListenActivity;
if (!parentActivity.IsListenTrigerred && parentActivity.ExecutionStatus != ActivityExecutionStatus.Canceling && parentActivity.ExecutionStatus != ActivityExecutionStatus.Closed)
{
//Check whether it is still live in tree.
if (!parentActivity.EnabledActivities.Contains(eventDrivenActivity))//Activity is dynamically removed.
{
return;
}
parentActivity.IsListenTrigerred = true;
for (int i = 0; i < parentActivity.EnabledActivities.Count; ++i)
{
EventDrivenActivity eventDriven = parentActivity.EnabledActivities[i] as EventDrivenActivity;
ListenEventActivitySubscriber eventSubscriber = parentActivity.ActivityState[i];
eventDriven.EventActivity.Unsubscribe(context, eventSubscriber);
}
eventDrivenActivity.RegisterForStatusChange(Activity.ClosedEvent, parentActivity);
context.ExecuteActivity(eventDrivenActivity);
}
}
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
List <ListenEventActivitySubscriber> eventActivitySubscribers = new List <ListenEventActivitySubscriber>();
this.ActivityState = eventActivitySubscribers;
//Subscribe to all EventDriven Children.
for (int i = 0; i < this.EnabledActivities.Count; ++i)
{
EventDrivenActivity eventDriven = this.EnabledActivities[i] as EventDrivenActivity;
ListenEventActivitySubscriber eventActivitySubscriber = new ListenEventActivitySubscriber(eventDriven);
eventDriven.EventActivity.Subscribe(executionContext, eventActivitySubscriber);
eventActivitySubscribers.Add(eventActivitySubscriber);
}
return(ActivityExecutionStatus.Executing);
}
protected override sealed void OnActivityChangeAdd(ActivityExecutionContext executionContext, Activity addedActivity)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (addedActivity == null)
{
throw new ArgumentNullException("addedActivity");
}
Debug.Assert(addedActivity is EventDrivenActivity, "Listen only contains EventDriven activities");
ListenActivity listen = executionContext.Activity as ListenActivity;
if (listen.ExecutionStatus == ActivityExecutionStatus.Executing && listen.ActivityState != null && !listen.IsListenTrigerred)
{
EventDrivenActivity eda = addedActivity as EventDrivenActivity;
ListenEventActivitySubscriber eventActivitySubscriber = new ListenEventActivitySubscriber(eda);
eda.EventActivity.Subscribe(executionContext, eventActivitySubscriber);
listen.ActivityState.Insert(listen.EnabledActivities.IndexOf(addedActivity), eventActivitySubscriber);
}
}
