internal static Activity GetLastCompensatableChild(CompositeActivity compositeActivity)
{
Activity[] activities = CompensationUtils.GetCompensatableChildren(compositeActivity);
if (activities != null && activities.Length > 0 && activities[activities.Length - 1] != null)
{
return(activities[activities.Length - 1]);
}
return(null);
}
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);
}
}
}
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)
{
// 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);
}
}
}
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);
}
}
}
