void IActivityEventListener <ActivityExecutionStatusChangedEventArgs> .OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context == null)
{
throw new ArgumentException("sender");
}
if (context.Activity.HasPrimaryClosed && context.Activity.LockCountOnStatusChange == 1)
{
// get exception
Exception exception = (Exception)context.Activity.GetValue(ActivityExecutionContext.CurrentExceptionProperty);
if (exception != null)
{
WorkflowTransactionOptions transactionOptions = TransactedContextFilter.GetTransactionOptions(context.Activity);
if (transactionOptions != null)
{
// request revert to checkpoint state
context.RequestRevertToCheckpointState(this.OnRevertInstanceState, new StateRevertedEventArgs(exception), false, null);
}
else
{
// release locks
context.ReleaseLocks(false);
context.Activity.UnregisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
context.Activity.ReleaseLockOnStatusChange(this);
}
}
else
{
try
{
// 1st param is for transactional, means if the release lock on status change will try to persist the workflow instace
// if that fails, then locks will be reacquired, otherwise they will be released.
context.ReleaseLocks(true);
context.Activity.UnregisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
context.Activity.ReleaseLockOnStatusChange(this);
context.DisposeCheckpointState();
}
catch
{
// re-subscribe
context.Activity.RegisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
throw;
}
}
}
}
public void OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context.Activity.HasPrimaryClosed && (context.Activity.LockCountOnStatusChange == 1))
{
context.ReleaseLocks(false);
context.Activity.UnregisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
context.Activity.ReleaseLockOnStatusChange(this);
}
}
void IActivityEventListener <ActivityExecutionStatusChangedEventArgs> .OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (context == null)
{
throw new ArgumentException("sender");
}
if (context.Activity.HasPrimaryClosed && (context.Activity.LockCountOnStatusChange == 1))
{
Exception exception = (Exception)context.Activity.GetValue(ActivityExecutionContext.CurrentExceptionProperty);
if (exception != null)
{
if (GetTransactionOptions(context.Activity) != null)
{
context.RequestRevertToCheckpointState(new EventHandler <EventArgs>(this.OnRevertInstanceState), new StateRevertedEventArgs(exception), false, null);
}
else
{
context.ReleaseLocks(false);
context.Activity.UnregisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
context.Activity.ReleaseLockOnStatusChange(this);
}
}
else
{
try
{
context.ReleaseLocks(true);
context.Activity.UnregisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
context.Activity.ReleaseLockOnStatusChange(this);
context.DisposeCheckpointState();
}
catch
{
context.Activity.RegisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
throw;
}
}
}
}
private void OnRevertInstanceState(object sender, EventArgs e)
{
if (sender == null)
{
throw new ArgumentNullException("sender");
}
if (e == null)
{
throw new ArgumentNullException("e");
}
ActivityExecutionContext context = sender as ActivityExecutionContext;
StateRevertedEventArgs args = e as StateRevertedEventArgs;
context.Activity.SetValueCommon(ActivityExecutionContext.CurrentExceptionProperty, args.Exception, ActivityExecutionContext.CurrentExceptionProperty.DefaultMetadata, false);
context.ReleaseLocks(false);
context.Activity.UnregisterForStatusChange(Activity.LockCountOnStatusChangeChangedEvent, this);
context.Activity.ReleaseLockOnStatusChange(this);
}
