private bool IsEventDrivenSubscribed(EventDrivenActivity eventDriven)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
EventActivitySubscription subscription = GetSubscription(eventActivity);
return(subscription != null);
}
internal void ReevaluateSubscriptions(ActivityExecutionContext context)
{
Dictionary <IComparable, StateMachineSubscription> subscriptionsShallowCopy = this.GetSubscriptionsShallowCopy();
List <IComparable> list = new List <IComparable>();
for (StateActivity activity = StateMachineHelpers.GetCurrentState(context); activity != null; activity = activity.Parent as StateActivity)
{
foreach (Activity activity2 in activity.EnabledActivities)
{
EventDrivenActivity eventDriven = activity2 as EventDrivenActivity;
if (eventDriven != null)
{
IComparable queueName = StateMachineHelpers.GetEventActivity(eventDriven).QueueName;
if (queueName != null)
{
StateMachineSubscription subscription;
subscriptionsShallowCopy.TryGetValue(queueName, out subscription);
EventActivitySubscription subscription2 = subscription as EventActivitySubscription;
if (subscription2 != null)
{
if (subscription2.EventDrivenName.Equals(eventDriven.QualifiedName))
{
list.Add(queueName);
continue;
}
if (subscription2.StateName.Equals(activity.QualifiedName))
{
throw new InvalidOperationException(SR.GetStateAlreadySubscribesToThisEvent(activity.QualifiedName, queueName));
}
if (this.IsParentState(activity, subscription2.StateName))
{
UnsubscribeAction action = new UnsubscribeAction(subscription2.StateName, subscription2.EventDrivenName);
this.ExecutionState.EnqueueAction(action);
subscriptionsShallowCopy.Remove(queueName);
}
}
if (!list.Contains(queueName))
{
SubscribeAction action2 = new SubscribeAction(activity.QualifiedName, eventDriven.QualifiedName);
this.ExecutionState.EnqueueAction(action2);
list.Add(queueName);
}
}
}
}
}
DisableQueuesAction action3 = new DisableQueuesAction(StateMachineHelpers.GetCurrentState(context).QualifiedName);
this.ExecutionState.EnqueueAction(action3);
}
private StateMachineSubscription SubscribeEventActivity(ActivityExecutionContext context, IEventActivity eventActivity)
{
EventActivitySubscription subscription = new EventActivitySubscription();
StateActivity state = (StateActivity)context.Activity;
subscription.Subscribe(context, state, eventActivity);
WorkflowQueue workflowQueue = GetWorkflowQueue(context, subscription.QueueName);
if (workflowQueue != null)
{
workflowQueue.Enabled = true;
}
this.Subscriptions[subscription.QueueName] = subscription;
return(subscription);
}
private EventActivitySubscription GetSubscription(IEventActivity eventActivity)
{
IComparable queueName = GetQueueName(eventActivity);
if ((queueName != null) && this.Subscriptions.ContainsKey(queueName))
{
EventActivitySubscription subscription = this.Subscriptions[queueName] as EventActivitySubscription;
Activity activity = (Activity)eventActivity;
if ((subscription != null) && !(subscription.EventActivityName != activity.QualifiedName))
{
return(subscription);
}
}
return(null);
}
private void UnsubscribeEventActivity(ActivityExecutionContext context, IEventActivity eventActivity)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (eventActivity == null)
{
throw new ArgumentNullException("eventActivity");
}
EventActivitySubscription subscription = this.GetSubscription(eventActivity);
WorkflowQueue workflowQueue = GetWorkflowQueue(context, subscription.QueueName);
if (workflowQueue != null)
{
workflowQueue.Enabled = false;
}
this.UnsubscribeEventActivity(context, eventActivity, subscription);
}
private void UnsubscribeEventActivity(ActivityExecutionContext context,
IEventActivity eventActivity,
EventActivitySubscription subscription)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (eventActivity == null)
{
throw new ArgumentNullException("eventActivity");
}
if (subscription == null)
{
throw new ArgumentNullException("subscription");
}
subscription.Unsubscribe(context, eventActivity);
RemoveFromQueue(subscription.SubscriptionId);
Debug.Assert(subscription.QueueName != null);
this.Subscriptions.Remove(subscription.QueueName);
}
private void UnsubscribeEventActivity(ActivityExecutionContext context,
IEventActivity eventActivity,
EventActivitySubscription subscription)
{
if (context == null)
throw new ArgumentNullException("context");
if (eventActivity == null)
throw new ArgumentNullException("eventActivity");
if (subscription == null)
throw new ArgumentNullException("subscription");
subscription.Unsubscribe(context, eventActivity);
RemoveFromQueue(subscription.SubscriptionId);
Debug.Assert(subscription.QueueName != null);
this.Subscriptions.Remove(subscription.QueueName);
}
private StateMachineSubscription SubscribeEventActivity(ActivityExecutionContext context,
IEventActivity eventActivity)
{
EventActivitySubscription subscription = new EventActivitySubscription();
StateActivity state = (StateActivity)context.Activity;
subscription.Subscribe(context, state, eventActivity);
WorkflowQueue workflowQueue = GetWorkflowQueue(context, subscription.QueueName);
if (workflowQueue != null)
workflowQueue.Enabled = true;
Debug.Assert(subscription.QueueName != null);
this.Subscriptions[subscription.QueueName] = subscription;
return subscription;
}
internal void ReevaluateSubscriptions(ActivityExecutionContext context)
{
Dictionary <IComparable, StateMachineSubscription> subscriptions = this.GetSubscriptionsShallowCopy();
List <IComparable> subscribed = new List <IComparable>();
StateActivity state = StateMachineHelpers.GetCurrentState(context);
while (state != null)
{
foreach (Activity activity in state.EnabledActivities)
{
EventDrivenActivity eventDriven = activity as EventDrivenActivity;
if (eventDriven == null)
{
continue;
}
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
IComparable queueName = eventActivity.QueueName;
if (queueName == null)
{
continue;
}
StateMachineSubscription subscription;
subscriptions.TryGetValue(queueName, out subscription);
EventActivitySubscription eventActivitySubscription = subscription as EventActivitySubscription;
if (eventActivitySubscription != null)
{
if (eventActivitySubscription.EventDrivenName.Equals(eventDriven.QualifiedName))
{
// this EventDriven is already subscribed
subscribed.Add(queueName);
continue;
}
else
{
// Check if this state already subscribe to this event
// if so, throws, since it is not valid to subscribe to the
// same event twice
if (eventActivitySubscription.StateName.Equals(state.QualifiedName))
{
throw new InvalidOperationException(SR.GetStateAlreadySubscribesToThisEvent(state.QualifiedName, queueName));
}
// some other EventDriven is subscribed, so we need to unsubscribe if
// the event driven belongs to one of our parents
if (IsParentState(state, eventActivitySubscription.StateName))
{
UnsubscribeAction unsubscribe = new UnsubscribeAction(eventActivitySubscription.StateName, eventActivitySubscription.EventDrivenName);
this.ExecutionState.EnqueueAction(unsubscribe);
subscriptions.Remove(queueName);
}
}
}
// Tests if a child state already subscribes to this event
// is so, skip, since the child takes precedence
if (subscribed.Contains(queueName))
{
continue;
}
SubscribeAction subscribe = new SubscribeAction(state.QualifiedName, eventDriven.QualifiedName);
this.ExecutionState.EnqueueAction(subscribe);
subscribed.Add(queueName);
}
state = state.Parent as StateActivity;
}
StateActivity currentState = StateMachineHelpers.GetCurrentState(context);
DisableQueuesAction disableQueues = new DisableQueuesAction(currentState.QualifiedName);
this.ExecutionState.EnqueueAction(disableQueues);
}
