public virtual async ValueTask <ActionEvent> ExecuteAsync(CancellationToken token)
{
var results = new object[_queue.Count];
var actions = new IAction[_queue.Count];
var lastEvent = ActionEvent.EmptyOkEvent;
for (var i = 0; i < _queue.Count; i++)
{
if (token.IsCancellationRequested)
{
return(ActionEvent.Cancel(this));
}
actions[i] = actions[i] ?? _queue[i](results); // action只生成一次
var action = actions[i];
if (action == null)
{
continue;
}
var result = await action.ExecuteAutoAsync(token).DonotCapture();
results[i] = result.Target;
switch (result.Type)
{
case ActionEventType.EvtError:
case ActionEventType.EvtCanceled:
return(result);
case ActionEventType.EvtRetry:
case ActionEventType.EvtRepeat:
--i; // 回退，即重复执行
break;
default:
lastEvent = result;
break;
}
}
return(lastEvent);
}