private ActivityExecutionStatus CompensateTargetActivity(ActivityExecutionContext context)
{
Activity activityByName = null;
Activity activity2 = context.Activity;
do
{
activityByName = activity2.Parent.GetActivityByName(this.TargetActivityName, true);
}while (activityByName == null);
if (((activityByName is ICompensatableActivity) && (activityByName.ExecutionStatus == ActivityExecutionStatus.Closed)) && (activityByName.ExecutionResult == ActivityExecutionResult.Succeeded))
{
activityByName.RegisterForStatusChange(Activity.ClosedEvent, this);
context.CompensateActivity(activityByName);
return(context.Activity.ExecutionStatus);
}
if (activityByName.ExecutionStatus == ActivityExecutionStatus.Initialized)
{
ActivityExecutionContextManager executionContextManager = context.ExecutionContextManager;
foreach (ActivityExecutionContext context2 in executionContextManager.ExecutionContexts)
{
if ((activityByName.GetActivityByName(context2.Activity.QualifiedName, true) != null) && (((context2.Activity.ExecutionStatus == ActivityExecutionStatus.Compensating) || (context2.Activity.ExecutionStatus == ActivityExecutionStatus.Faulting)) || (context2.Activity.ExecutionStatus == ActivityExecutionStatus.Canceling)))
{
return(context.Activity.ExecutionStatus);
}
}
for (int i = executionContextManager.CompletedExecutionContexts.Count - 1; i >= 0; i--)
{
ActivityExecutionContextInfo contextInfo = executionContextManager.CompletedExecutionContexts[i];
if (((byte)(contextInfo.Flags & PersistFlags.NeedsCompensation)) != 0)
{
ActivityExecutionContext context3 = executionContextManager.DiscardPersistedExecutionContext(contextInfo);
if (context3.Activity is ICompensatableActivity)
{
context3.Activity.RegisterForStatusChange(Activity.ClosedEvent, this);
context3.CompensateActivity(context3.Activity);
}
return(context.Activity.ExecutionStatus);
}
}
}
else if (CompensationUtils.TryCompensateLastCompletedChildActivity(context, activityByName, this))
{
return(context.Activity.ExecutionStatus);
}
return(ActivityExecutionStatus.Closed);
}
void IActivityEventListener <ActivityExecutionStatusChangedEventArgs> .OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context == null)
{
throw new ArgumentException("sender");
}
if (e.Activity == context.Activity)
{
if (context.Activity.HasPrimaryClosed && !((bool)context.Activity.GetValue(CompensateProcessedProperty)))
{
context.Activity.SetValue(CompensateProcessedProperty, true);
if (context.Activity.ExecutionResult != ActivityExecutionResult.Compensated)
{
context.Activity.ReleaseLockOnStatusChange(this);
}
else
{
Activity compensationHandler = GetCompensationHandler(context.Activity);
if (compensationHandler != null)
{
compensationHandler.RegisterForStatusChange(Activity.ClosedEvent, this);
context.ExecuteActivity(compensationHandler);
}
else if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
context.Activity.ReleaseLockOnStatusChange(this);
}
}
}
}
else if ((e.Activity is CompensationHandlerActivity) && (e.ExecutionStatus == ActivityExecutionStatus.Closed))
{
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
context.Activity.ReleaseLockOnStatusChange(this);
}
else if (e.ExecutionStatus == ActivityExecutionStatus.Closed)
{
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
context.Activity.ReleaseLockOnStatusChange(this);
}
}
}
public override ActivityExecutionStatus Execute(Activity activity, ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (activity == null)
{
throw new ArgumentNullException("activity");
}
if (!activity.SupportsTransaction)
{
throw new ArgumentException("activity");
}
activity.RegisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
activity.HoldLockOnStatusChange(this);
return(ExecuteActivity(activity, executionContext, false));
}
public override ActivityExecutionStatus Execute(Activity activity, ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
if (activity == null)
{
throw new ArgumentNullException("activity");
}
activity.RegisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
activity.HoldLockOnStatusChange(this);
if (executionContext.AcquireLocks(this))
{
return(this.ExecuteActivityNow(executionContext));
}
return(activity.ExecutionStatus);
}
private static bool TryCompensateLastCompletedChildActivity(ActivityExecutionContext context, Activity targetActivity, IActivityEventListener <ActivityExecutionStatusChangedEventArgs> statusChangeHandler, bool isimmediateCompensation)
{
SortedDictionary <int, CompensationInfo> sortedListOfCompensatableTargets = new SortedDictionary <int, CompensationInfo>();
if (targetActivity is CompositeActivity)
{
if (CollectCompensatableTargetActivities(targetActivity as CompositeActivity, sortedListOfCompensatableTargets, isimmediateCompensation))
{
return(true);
}
if (CollectCompensatableActiveContexts(context, targetActivity, sortedListOfCompensatableTargets, isimmediateCompensation))
{
return(true);
}
CollectCompensatableCompletedContexts(context, targetActivity, sortedListOfCompensatableTargets, isimmediateCompensation);
if (sortedListOfCompensatableTargets.Count == 0)
{
CompleteRevokedExecutionContext(targetActivity, context);
return(false);
}
int?nullable = targetActivity.GetValue(CompensationHandlingFilter.LastCompensatedOrderIdProperty) as int?;
int num = -1;
CompensationInfo info = null;
foreach (int num2 in sortedListOfCompensatableTargets.Keys)
{
if (nullable.HasValue)
{
int?nullable2 = nullable;
int num3 = num2;
if ((nullable2.GetValueOrDefault() < num3) && nullable2.HasValue)
{
break;
}
}
info = sortedListOfCompensatableTargets[num2];
num = num2;
}
if (info == null)
{
CompleteRevokedExecutionContext(targetActivity, context);
return(false);
}
targetActivity.SetValue(CompensationHandlingFilter.LastCompensatedOrderIdProperty, num);
if ((info.TargetActivity != null) && (info.TargetActivity is ICompensatableActivity))
{
info.TargetActivity.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
context.CompensateActivity(info.TargetActivity);
return(true);
}
if ((info.TargetExecutionInfo != null) && (info.TargetExecutionContextManager != null))
{
ActivityExecutionContext context2 = info.TargetExecutionContextManager.DiscardPersistedExecutionContext(info.TargetExecutionInfo);
if (context2.Activity is ICompensatableActivity)
{
context2.Activity.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
context2.CompensateActivity(context2.Activity);
return(true);
}
if (context2.Activity is CompositeActivity)
{
Activity lastCompensatableChild = GetLastCompensatableChild(context2.Activity as CompositeActivity);
if (lastCompensatableChild != null)
{
lastCompensatableChild.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
context2.CompensateActivity(lastCompensatableChild);
return(true);
}
return(TryCompensateLastCompletedChildActivity(context2, context2.Activity, statusChangeHandler, false));
}
}
else if ((info.TargetExecutionContext != null) && (info.TargetExecutionContext.Activity is CompositeActivity))
{
Activity activity = GetLastCompensatableChild(info.TargetExecutionContext.Activity as CompositeActivity);
if (activity != null)
{
activity.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
info.TargetExecutionContext.CompensateActivity(activity);
return(true);
}
return(TryCompensateLastCompletedChildActivity(info.TargetExecutionContext, info.TargetExecutionContext.Activity, statusChangeHandler, false));
}
}
return(false);
}
void IActivityEventListener <ActivityExecutionStatusChangedEventArgs> .OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context == null)
{
throw new ArgumentException("sender");
}
if (e.Activity == context.Activity)
{
if (context.Activity.HasPrimaryClosed && !(bool)context.Activity.GetValue(CompensateProcessedProperty))
{
context.Activity.SetValue(CompensateProcessedProperty, true);
if (context.Activity.ExecutionResult == ActivityExecutionResult.Compensated)
{
// run compensation handler or do default compensation handling
Activity compensationHandler = GetCompensationHandler(context.Activity);
if (compensationHandler != null)
{
// subscribe for status change on compensation handler
compensationHandler.RegisterForStatusChange(Activity.ClosedEvent, this);
// execute compensation handler
context.ExecuteActivity(compensationHandler);
}
else
{
// do default compensation
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
// let activity get into closed state
context.Activity.ReleaseLockOnStatusChange(this);
}
}
}
else
{
// let activity get into closed state
context.Activity.ReleaseLockOnStatusChange(this);
}
}
}
else if (e.Activity is CompensationHandlerActivity && e.ExecutionStatus == ActivityExecutionStatus.Closed)
{
// remove subscriber for status change on compensation handler
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
// release lock on the primary activity
context.Activity.ReleaseLockOnStatusChange(this);
}
else if (e.ExecutionStatus == ActivityExecutionStatus.Closed)
{
// remove subscriber for status change on compensated activity
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
// release lock on the primary activity
context.Activity.ReleaseLockOnStatusChange(this);
}
}
}
private static bool TryCompensateLastCompletedChildActivity(ActivityExecutionContext context, Activity targetActivity, IActivityEventListener <ActivityExecutionStatusChangedEventArgs> statusChangeHandler, bool isimmediateCompensation)
{
SortedDictionary <int, CompensationInfo> sortedListOfCompensatableTargets = new SortedDictionary <int, CompensationInfo>();
if (!(targetActivity is CompositeActivity))
{
return(false);
}
//Walk through all of the direct children which are compensatable and add them in the sorted order of their completion
//bail out if any of the compensatable children is currently compensating/faulting or canceling
if (CollectCompensatableTargetActivities(targetActivity as CompositeActivity, sortedListOfCompensatableTargets, isimmediateCompensation))
{
return(true);
}
// walk through active contexts that contain compensatable child, add them in the sorted order of the completion
// this also, walks through the completed contexts which are compensatable and are nested directly within the active contexts and adds them in the order of their completion
// bail out if any activity is currently compensating/faulting or cancelling
if (CollectCompensatableActiveContexts(context, targetActivity, sortedListOfCompensatableTargets, isimmediateCompensation))
{
return(true);
}
// walk through all completed execution contexts which are compensatable and are directly nested under the target activity,
//and add them to our sorted list
CollectCompensatableCompletedContexts(context, targetActivity, sortedListOfCompensatableTargets, isimmediateCompensation);
//if there were no compensatable targets found, bail out
if (sortedListOfCompensatableTargets.Count == 0)
{
CompleteRevokedExecutionContext(targetActivity, context);
return(false);
}
int?lastCompletedOrderId = targetActivity.GetValue(CompensationHandlingFilter.LastCompensatedOrderIdProperty) as Nullable <int>;
int nextLastCompletedOrderId = -1;
//get the last compensatable target - this could be an activity, contextInfo or a Context
CompensationInfo lastCompensatableTarget = null;
foreach (int completedOrderId in sortedListOfCompensatableTargets.Keys)
{
if (lastCompletedOrderId.HasValue && lastCompletedOrderId < completedOrderId)
{
break;
}
lastCompensatableTarget = sortedListOfCompensatableTargets[completedOrderId];
nextLastCompletedOrderId = completedOrderId;
}
//We are done with compensation on entire branch, now complete execution contexts
//recursilvely which we might have opened up.
if (lastCompensatableTarget == null)
{
CompleteRevokedExecutionContext(targetActivity, context);
return(false);
}
targetActivity.SetValue(CompensationHandlingFilter.LastCompensatedOrderIdProperty, nextLastCompletedOrderId);
//the last compensatable target could be an activity
if (lastCompensatableTarget.TargetActivity != null && lastCompensatableTarget.TargetActivity is ICompensatableActivity)
{
lastCompensatableTarget.TargetActivity.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
context.CompensateActivity(lastCompensatableTarget.TargetActivity);
return(true);
} //or get the last compensatable "completed" context
else if (lastCompensatableTarget.TargetExecutionInfo != null && lastCompensatableTarget.TargetExecutionContextManager != null)
{
ActivityExecutionContext revokedExecutionContext = lastCompensatableTarget.TargetExecutionContextManager.DiscardPersistedExecutionContext(lastCompensatableTarget.TargetExecutionInfo);
//get the "first" compensatable child and compensate it
if (revokedExecutionContext.Activity is ICompensatableActivity)
{
revokedExecutionContext.Activity.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
revokedExecutionContext.CompensateActivity(revokedExecutionContext.Activity);
return(true);
}
else if (revokedExecutionContext.Activity is CompositeActivity)
{
//get the last compensatable child of the revoked context
Activity compensatableChild = GetLastCompensatableChild(revokedExecutionContext.Activity as CompositeActivity);
if (compensatableChild != null)
{
compensatableChild.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
revokedExecutionContext.CompensateActivity(compensatableChild);
return(true);
}
else// recursively, walk the context tree and keep revoking the compensatable contexts
{
return(TryCompensateLastCompletedChildActivity(revokedExecutionContext, revokedExecutionContext.Activity, statusChangeHandler, false));
}
}
}
else if (lastCompensatableTarget.TargetExecutionContext != null) //or get the last compensatable "active" context
{
if (lastCompensatableTarget.TargetExecutionContext.Activity is CompositeActivity)
{
//get the last compensatable child of the active context
Activity compensatableChild = GetLastCompensatableChild(lastCompensatableTarget.TargetExecutionContext.Activity as CompositeActivity);
if (compensatableChild != null)
{
compensatableChild.RegisterForStatusChange(Activity.StatusChangedEvent, statusChangeHandler);
lastCompensatableTarget.TargetExecutionContext.CompensateActivity(compensatableChild);
return(true);
}
else // recursively, walk the context tree and keep revoking the compensatable contexts
{
return(TryCompensateLastCompletedChildActivity(lastCompensatableTarget.TargetExecutionContext, lastCompensatableTarget.TargetExecutionContext.Activity, statusChangeHandler, false));
}
}
}
return(false);
}
public void OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context == null)
{
throw new ArgumentException("sender");
}
// waiting for primary activity to close
if (e.Activity == context.Activity)
{
if (context.Activity.HasPrimaryClosed &&
!(bool)context.Activity.GetValue(FaultAndCancellationHandlingFilter.FaultProcessedProperty))
{
context.Activity.SetValue(FaultAndCancellationHandlingFilter.FaultProcessedProperty, true);
if (context.Activity.WasExecuting &&
context.Activity.ExecutionResult == ActivityExecutionResult.Faulted &&
context.Activity.GetValue(ActivityExecutionContext.CurrentExceptionProperty) != null)
{
// execute exceptionHandlers, iff activity has transitioned from Executing to Faulting.
CompositeActivity exceptionHandlersActivity = FaultAndCancellationHandlingFilter.GetFaultHandlers(context.Activity);
if (exceptionHandlersActivity != null)
{
// listen for FaultHandler status change events
exceptionHandlersActivity.RegisterForStatusChange(Activity.ClosedEvent, this);
// execute exception handlers
context.ExecuteActivity(exceptionHandlersActivity);
}
else
{
// compensate completed children
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
SafeReleaseLockOnStatusChange(context); // no children to compensate...release lock on to the close status of the activity
}
}
}
else if (context.Activity.ExecutionResult == ActivityExecutionResult.Canceled)
{
// if primary activity is closed and outcome is canceled, then run the cancel handler
Activity cancelHandler = FaultAndCancellationHandlingFilter.GetCancellationHandler(context.Activity);
if (cancelHandler != null)
{
// execute the cancel handler
cancelHandler.RegisterForStatusChange(Activity.ClosedEvent, this);
context.ExecuteActivity(cancelHandler);
}
else
{
// run default compensation
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
SafeReleaseLockOnStatusChange(context); // release lock on to the close status of the activity
}
}
}
else // release lock on to the close status of the activity
{
SafeReleaseLockOnStatusChange(context);
}
}
}
else if ((e.Activity is FaultHandlersActivity || e.Activity is CancellationHandlerActivity)
&&
(e.ExecutionStatus == ActivityExecutionStatus.Closed)
)
{
// remove subscriber
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
// fetch the exception , it would be null if it was handled
if (context.Activity.GetValue(ActivityExecutionContext.CurrentExceptionProperty) != null)
{
// the exception was not handled by exceptionHandlers.... do default exceptionHandling
// compesate completed children
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
SafeReleaseLockOnStatusChange(context); // no children to compensate.Release lock on to the close status of the activity
}
}
else// the exception was handled by the exceptionHandlers. Release lock on to the close status of the parent activity
{
SafeReleaseLockOnStatusChange(context);
}
}
else if (e.ExecutionStatus == ActivityExecutionStatus.Closed)
{
// compensation of a child was in progress. // remove subscriber for this
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
// see if there are other children to be compensated
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
SafeReleaseLockOnStatusChange(context); // release lock on to the close status of the parent activity
}
}
}
private ActivityExecutionStatus CompensateTargetActivity(ActivityExecutionContext context)
{
Activity targetActivity = null;
Activity commonParentActivity = context.Activity;
do
{
commonParentActivity = commonParentActivity.Parent;
targetActivity = commonParentActivity.GetActivityByName(this.TargetActivityName, true);
} while (targetActivity == null);
if (targetActivity is ICompensatableActivity &&
targetActivity.ExecutionStatus == ActivityExecutionStatus.Closed &&
targetActivity.ExecutionResult == ActivityExecutionResult.Succeeded)
{
// same execution context
targetActivity.RegisterForStatusChange(Activity.ClosedEvent, this);
context.CompensateActivity(targetActivity);
return(context.Activity.ExecutionStatus);
}
else if (targetActivity.ExecutionStatus == ActivityExecutionStatus.Initialized)
{
// Template activity
// walk through active contexts
ActivityExecutionContextManager contextManager = context.ExecutionContextManager;
foreach (ActivityExecutionContext activeContext in contextManager.ExecutionContexts)
{
if (targetActivity.GetActivityByName(activeContext.Activity.QualifiedName, true) != null)
{
if (activeContext.Activity.ExecutionStatus == ActivityExecutionStatus.Compensating ||
activeContext.Activity.ExecutionStatus == ActivityExecutionStatus.Faulting ||
activeContext.Activity.ExecutionStatus == ActivityExecutionStatus.Canceling
)
{
return(context.Activity.ExecutionStatus);
}
}
}
// walk through all completed execution contexts
for (int index = contextManager.CompletedExecutionContexts.Count - 1; index >= 0; index--)
{
//only compensate direct child during explicit compensation
ActivityExecutionContextInfo completedActivityInfo = contextManager.CompletedExecutionContexts[index];
if (((completedActivityInfo.Flags & PersistFlags.NeedsCompensation) != 0))
{
ActivityExecutionContext revokedExecutionContext = contextManager.DiscardPersistedExecutionContext(completedActivityInfo);
if (revokedExecutionContext.Activity is ICompensatableActivity)
{
revokedExecutionContext.Activity.RegisterForStatusChange(Activity.ClosedEvent, this);
revokedExecutionContext.CompensateActivity(revokedExecutionContext.Activity);
}
return(context.Activity.ExecutionStatus);
}
}
}
else
{
// currently faulting, canceling, or compensating
if (CompensationUtils.TryCompensateLastCompletedChildActivity(context, targetActivity, this))
{
return(context.Activity.ExecutionStatus);
}
}
return(ActivityExecutionStatus.Closed);
}
public void OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context == null)
{
throw new ArgumentException("sender");
}
if (e.Activity == context.Activity)
{
if (context.Activity.HasPrimaryClosed && !((bool)context.Activity.GetValue(FaultProcessedProperty)))
{
context.Activity.SetValue(FaultProcessedProperty, true);
if ((!context.Activity.WasExecuting || (context.Activity.ExecutionResult != ActivityExecutionResult.Faulted)) || (context.Activity.GetValue(ActivityExecutionContext.CurrentExceptionProperty) == null))
{
if (context.Activity.ExecutionResult != ActivityExecutionResult.Canceled)
{
this.SafeReleaseLockOnStatusChange(context);
}
else
{
Activity cancellationHandler = GetCancellationHandler(context.Activity);
if (cancellationHandler != null)
{
cancellationHandler.RegisterForStatusChange(Activity.ClosedEvent, this);
context.ExecuteActivity(cancellationHandler);
}
else if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
this.SafeReleaseLockOnStatusChange(context);
}
}
}
else
{
CompositeActivity faultHandlers = GetFaultHandlers(context.Activity);
if (faultHandlers != null)
{
faultHandlers.RegisterForStatusChange(Activity.ClosedEvent, this);
context.ExecuteActivity(faultHandlers);
}
else if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
this.SafeReleaseLockOnStatusChange(context);
}
}
}
}
else if (((e.Activity is FaultHandlersActivity) || (e.Activity is CancellationHandlerActivity)) && (e.ExecutionStatus == ActivityExecutionStatus.Closed))
{
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
if (context.Activity.GetValue(ActivityExecutionContext.CurrentExceptionProperty) == null)
{
this.SafeReleaseLockOnStatusChange(context);
}
else if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
this.SafeReleaseLockOnStatusChange(context);
}
}
else if (e.ExecutionStatus == ActivityExecutionStatus.Closed)
{
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
if (!CompensationUtils.TryCompensateLastCompletedChildActivity(context, context.Activity, this))
{
this.SafeReleaseLockOnStatusChange(context);
}
}
}
