private bool IsEventDrivenSubscribed(EventDrivenActivity eventDriven)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
EventActivitySubscription subscription = GetSubscription(eventActivity);
return(subscription != null);
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
StateActivity rootState = StateMachineHelpers.GetRootState(base.State);
Queue <StateActivity> queue = new Queue <StateActivity>();
queue.Enqueue(rootState);
while (queue.Count > 0)
{
foreach (Activity activity3 in queue.Dequeue().EnabledActivities)
{
EventDrivenActivity eventDriven = activity3 as EventDrivenActivity;
if (eventDriven != null)
{
IComparable queueName = StateMachineHelpers.GetEventActivity(eventDriven).QueueName;
if (queueName != null)
{
WorkflowQueue workflowQueue = StateMachineSubscriptionManager.GetWorkflowQueue(context, queueName);
if (workflowQueue != null)
{
workflowQueue.Enabled = base.SubscriptionManager.Subscriptions.ContainsKey(queueName);
}
}
}
else
{
StateActivity item = activity3 as StateActivity;
if (item != null)
{
queue.Enqueue(item);
}
}
}
}
}
internal void UnsubscribeEventDriven(ActivityExecutionContext context, EventDrivenActivity eventDriven)
{
Debug.Assert(IsEventDrivenSubscribed(eventDriven));
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
UnsubscribeEventActivity(context, eventActivity);
}
internal void SubscribeEventDriven(ActivityExecutionContext context, EventDrivenActivity eventDriven)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
Activity activity1 = (Activity)eventActivity;
GetQueueName(eventActivity);
this.SubscribeEventActivity(context, eventActivity);
}
internal void SubscribeEventDriven(ActivityExecutionContext context, EventDrivenActivity eventDriven)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
Activity activity = (Activity)eventActivity;
IComparable queueName = GetQueueName(eventActivity);
Debug.Assert(!this.Subscriptions.ContainsKey(queueName));
SubscribeEventActivity(context, eventActivity);
}
internal static void ChangeEventDrivenQueueState(ActivityExecutionContext context, EventDrivenActivity eventDriven, bool enabled)
{
IComparable queueName = GetQueueName(StateMachineHelpers.GetEventActivity(eventDriven));
if (queueName != null)
{
WorkflowQueue workflowQueue = GetWorkflowQueue(context, queueName);
if (workflowQueue != null)
{
workflowQueue.Enabled = enabled;
}
}
}
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);
}
internal static void ChangeEventDrivenQueueState(ActivityExecutionContext context, EventDrivenActivity eventDriven, bool enabled)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
IComparable queueName = GetQueueName(eventActivity);
if (queueName == null)
{
return; // skip unitialized follower
}
WorkflowQueue workflowQueue = GetWorkflowQueue(context, queueName);
if (workflowQueue != null)
{
workflowQueue.Enabled = enabled;
}
}
internal override void Execute(ActivityExecutionContext context)
{
base.Execute(context);
StateActivity state = this.State;
StateActivity rootState = StateMachineHelpers.GetRootState(state);
Queue <StateActivity> states = new Queue <StateActivity>();
states.Enqueue(rootState);
while (states.Count > 0)
{
state = states.Dequeue();
foreach (Activity activity in state.EnabledActivities)
{
EventDrivenActivity eventDriven = activity as EventDrivenActivity;
if (eventDriven != null)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
IComparable queueName = eventActivity.QueueName;
if (queueName != null)
{
WorkflowQueue queue = StateMachineSubscriptionManager.GetWorkflowQueue(context, queueName);
if (queue != null)
{
queue.Enabled = this.SubscriptionManager.Subscriptions.ContainsKey(queueName);
}
}
}
else
{
StateActivity childState = activity as StateActivity;
if (childState != null)
{
states.Enqueue(childState);
}
}
}
}
}
internal void UnsubscribeEventDriven(ActivityExecutionContext context, EventDrivenActivity eventDriven)
{
IEventActivity eventActivity = StateMachineHelpers.GetEventActivity(eventDriven);
this.UnsubscribeEventActivity(context, eventActivity);
}
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);
}
