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; } } } }
private static ActivityExecutionStatus ExecuteActivity(Activity activity, ActivityExecutionContext context, bool locksAcquired) { // acquire needed synchronization TransactedContextFilter executor = (TransactedContextFilter)ActivityExecutors.GetActivityExecutorFromType(typeof(TransactedContextFilter)); if (!locksAcquired && !context.AcquireLocks(executor)) { return(activity.ExecutionStatus); } // checkpoint for instance state // WorkflowTransactionOptions transaction = TransactedContextFilter.GetTransactionOptions(activity); if (transaction != null) { context.CheckpointInstanceState(); } // delegate to the next executor for the activity return(executor.NextActivityExecutorInChain(activity).Execute(activity, context)); }