/// <summary>
/// Handle child task completed eveent
/// </summary>
/// <param name="tce"></param>
private void HandleChildTaskCompleted(TaskCompleted tce)
{
lock (this)
{
if (tce.ParentTaskInstanceId != this.InstanceId)
throw new TaskRuntimeException("Parent task correlation id is incorrect").SetInstanceId(InstanceId);
TransitionInfo ti = GetTransitionInfo(tce.FromTaskInstanceId);
if (ti == null)
throw new TaskRuntimeException("Child task not found: " + tce.FromTaskInstanceId).SetInstanceId(InstanceId);
if (ti.Status == TransitionStatus.Completed)
return;
if (ti.IsTransitionActive)
{
OnChildTaskCompleted(tce);
}
else
{
log.Warn("Child task {0} ({1}) completed, but current transition status is {2}. Ignoring the notification - status inconsistent.", tce.FromTaskInstanceId, ti.TaskId, ti.Status);
return;
}
//else throw new Exception("Invalid transition status");
}
}
/// <summary>
/// Invoked when a child task completes. Executes task output data bindings
/// and moves the tokens.
/// TODO: handle a case when the transition is 'cancelling' but the task fails or completes
/// before nginn cancels it
/// </summary>
/// <param name="tce"></param>
private void OnChildTaskCompleted(TaskCompleted tce)
{
log.Debug("Child task completed: {0}", tce.FromTaskInstanceId);
TransitionInfo ti = GetTransitionInfo(tce.FromTaskInstanceId);
TaskDef tsk = MyTask.GetTask(ti.TaskId);
if (ti.Status == TransitionStatus.Enabling)
ti.Status = TransitionStatus.Enabled;
if (ti.Status == TransitionStatus.Enabled || ti.Status == TransitionStatus.Started)
{
ConsumeTaskInputTokens(tce.FromTaskInstanceId);
if (tce is MultiTaskCompleted)
{
MultiTaskCompleted mce = (MultiTaskCompleted)tce;
if (!string.IsNullOrEmpty(tsk.MultiInstanceResultsBinding) && mce.MultiOutputData != null)
{
TaskData[tsk.MultiInstanceResultsBinding] = mce.MultiOutputData;
}
}
else
{
if (tce.OutputData != null)
{
ScriptRuntime.ExecuteChildTaskOutputDataBinding(this, tsk, tce.OutputData, Context);
}
}
ti.Status = TransitionStatus.Completed;
ProduceTaskOutputTokens(ti.InstanceId);
}
else
{
ti.Status = TransitionStatus.Completed;
log.Warn("Task {0} has completed, but the transition status was {1} and it did not produce output tokens or execute data bindings", ti.InstanceId, ti.Status);
}
}
private void Handle(TaskCompleted message)
{
HandleChildTaskCompleted(message);
}
private void Handle(TaskCompleted message)
{
RequireActivation(true);
if (message.ParentTaskInstanceId != this.InstanceId) throw new Exception();
if (message is MultiTaskCompleted) throw new Exception();
TransitionInfo ti = GetTransition(message.FromTaskInstanceId);
if (ti == null) throw new Exception();
log.Info("MT Child task {0} has completed", ti.InstanceId);
if (ti.Status == TransitionStatus.Completed)
return;
if (!ti.IsTransitionActive)
{
log.Warn("Transition {0} ({1}) is not active: {2}", ti.InstanceId, ti.TaskId, ti.Status);
return;
}
ti.Status = TransitionStatus.Completed;
ti.OutputData = message.OutputData;
if (ti.OutputData == null)
{
log.Info("No output data returned from child task {0}", ti.InstanceId);
ti.OutputData = new Dictionary<string, object>();
}
OnTransitionStatusChanged(ti.InstanceId);
return;
}