private void RemoveActiveBookmark(ActivityContext context)
{
StateMachineEventManager eventManager = this.EventManager.Get(context);
Bookmark bookmark = _evaluateConditionBookmark.Get(context);
if (bookmark != null)
{
eventManager.RemoveActiveBookmark(bookmark);
}
}
/// <summary>
/// Execution of StateMachine
/// </summary>
/// <param name="context">NativeActivityContext reference</param>
//[SuppressMessage("Microsoft.Design", "CA1062:Validate arguments of public methods", MessageId = "0",
//Justification = "The context is used by workflow runtime. The parameter should be fine.")]
protected override void Execute(NativeActivityContext context)
{
// We view the duration before moving to initial state is on transition.
StateMachineEventManager localEventManager = _eventManager.Get(context);
localEventManager.OnTransition = true;
localEventManager.CurrentBeingProcessedEvent = null;
int index = StateMachineIdHelper.GetChildStateIndex(RootId, this.InitialState.StateId);
context.ScheduleFunc <StateMachineEventManager, string>(
_internalStateFuncs[index],
localEventManager,
_onStateComplete);
}
private void TakeTransition(NativeActivityContext context, StateMachineEventManager eventManager, int triggerId)
{
this.EventManager.Get(context).OnTransition = true;
InternalTransition transition = this.GetInternalTransition(triggerId);
if (transition.IsUnconditional)
{
Fx.Assert(-1 == eventManager.CurrentConditionIndex, "CurrentConditionIndex should be -1, if the transition is unconditional.");
this.PrepareForExit(context, this.GetTo(triggerId));
}
else
{
Fx.Assert(-1 != eventManager.CurrentConditionIndex, "CurrentConditionIndex should not be -1, if the transition is conditional.");
this.PrepareForExit(context, this.GetTo(triggerId, eventManager.CurrentConditionIndex));
}
}
private void ScheduleAction(NativeActivityContext context)
{
StateMachineEventManager eventManager = this.EventManager.Get(context);
if (eventManager.IsReferredByBeingProcessedEvent(_evaluateConditionBookmark.Get(context)))
{
InternalTransition transition = this.GetInternalTransition(eventManager.CurrentBeingProcessedEvent.TriggedId);
Activity action = transition.TransitionDataList[-1 == eventManager.CurrentConditionIndex ? 0 : eventManager.CurrentConditionIndex].Action;
if (action != null)
{
context.ScheduleActivity(action);
}
}
this.RemoveBookmarks(context);
}
private void StartEvaluateCondition(NativeActivityContext context, Bookmark bookmark, object value)
{
// Start to evaluate conditions of the trigger which represented by currentTriggerIndex
StateMachineEventManager eventManager = this.EventManager.Get(context);
int triggerId = eventManager.CurrentBeingProcessedEvent.TriggedId;
InternalTransition transition = this.GetInternalTransition(triggerId);
if (transition.IsUnconditional)
{
eventManager.CurrentConditionIndex = -1;
this.TakeTransition(context, eventManager, triggerId);
}
else
{
eventManager.CurrentConditionIndex = 0;
context.ScheduleActivity <bool>(
this.GetCondition(
triggerId,
eventManager.CurrentConditionIndex),
_onConditionComplete,
null);
}
}
private static void ProcessNextTriggerCompletedEvent(NativeActivityContext context, StateMachineEventManager eventManager)
{
eventManager.CurrentBeingProcessedEvent = null;
eventManager.OnTransition = false;
TriggerCompletedEvent completedEvent = eventManager.GetNextCompletedEvent();
if (completedEvent != null)
{
StateMachineExtension extension = context.GetExtension <StateMachineExtension>();
Fx.Assert(extension != null, "Failed to obtain a StateMachineExtension.");
extension.ResumeBookmark(completedEvent.Bookmark);
}
}
/// <summary>
/// Used for Dynamic Update: after the instance is updated, if the statemachine is already transitioning, the index of the to-be-scheduled state
/// would need to be updated.
/// </summary>
/// <param name="updateContext">Dynamic Update context</param>
/// <param name="eventManager">Internal StateMachineEventManager</param>
/// <returns>True, 1. if update is successful and the instanced is updated with the new indexes, and 2 all the trigger ID in the queue are updated;
/// false otherwise and the update should fail.</returns>
private bool UpdateEventManager(
NativeActivityUpdateContext updateContext,
StateMachineEventManager eventManager)
{
Fx.Assert(null != eventManager.CurrentBeingProcessedEvent, "The eventManager must have some info that needs to be updated during transition.");
int updatedEventsInQueue = 0;
int originalTriggerId = int.MinValue;
int originalConditionIndex = int.MinValue;
bool updateCurrentEventSucceed = null == eventManager.CurrentBeingProcessedEvent ? true : false;
foreach (InternalTransition transition in this.internalTransitions)
{
object savedTriggerIndex = updateContext.GetSavedOriginalValue(transition.Trigger);
if (savedTriggerIndex != null)
{
Fx.Assert(!updateContext.IsNewlyAdded(transition.Trigger), "the trigger in transition already exist.");
if (null != eventManager.CurrentBeingProcessedEvent &&
eventManager.CurrentBeingProcessedEvent.TriggedId == (int)savedTriggerIndex)
{
// found a match of the running trigger update the current processed event
// Don't match the trigger ID, match only when the Condition is also matched.
if (eventManager.CurrentConditionIndex == -1)
{
if (transition.IsUnconditional)
{
// executing transition before persist is unconditional
originalTriggerId = eventManager.CurrentBeingProcessedEvent.TriggedId;
originalConditionIndex = 0;
eventManager.CurrentBeingProcessedEvent.TriggedId = transition.InternalTransitionIndex;
if (updateContext.GetValue(this.isExiting))
{
Fx.Assert(eventManager.OnTransition, "The state is transitioning.");
updateContext.SetValue(this.Result, GetTo(transition.InternalTransitionIndex));
}
updateCurrentEventSucceed = true;
}
else
{
updateContext.DisallowUpdate(SR.ChangeTransitionTypeDuringTransitioningBlockDU);
return(false);
}
}
else if (eventManager.CurrentConditionIndex >= 0)
{
Fx.Assert(!transition.IsUnconditional, "Cannot update a running conditional transition with a unconditional one.");
if (!transition.IsUnconditional)
{
// executing transition before and after are conditional
for (int updatedIndex = 0; updatedIndex < transition.TransitionDataList.Count; updatedIndex++)
{
Activity condition = transition.TransitionDataList[updatedIndex].Condition;
Fx.Assert(null != condition, "Conditional transition must have Condition activity.");
int?savedCondIndex = updateContext.GetSavedOriginalValue(condition) as int?;
if (eventManager.CurrentConditionIndex == savedCondIndex)
{
originalTriggerId = eventManager.CurrentBeingProcessedEvent.TriggedId;
originalConditionIndex = eventManager.CurrentConditionIndex;
eventManager.CurrentBeingProcessedEvent.TriggedId = transition.InternalTransitionIndex;
eventManager.CurrentConditionIndex = updatedIndex;
if (updateContext.GetValue(this.isExiting))
{
Fx.Assert(eventManager.OnTransition, "The state is transitioning.");
updateContext.SetValue(this.Result, this.GetTo(transition.InternalTransitionIndex, (int)updatedIndex));
}
updateCurrentEventSucceed = true;
break;
}
}
}
}
}
foreach (TriggerCompletedEvent completedEvent in eventManager.Queue)
{
if ((int)savedTriggerIndex == completedEvent.TriggedId)
{
completedEvent.TriggedId = transition.InternalTransitionIndex;
updatedEventsInQueue++;
}
}
}
}
return(eventManager.Queue.Count() == updatedEventsInQueue ? updateCurrentEventSucceed : false);
}
