如何使用ActionFilterAttribute来记录运行时间

我创建了一个操作过滤器，用于测量Web API v2中每个操作的运行时间。

public class RunningTimeAttribute : ActionFilterAttribute
    {
        private readonly ILogFactory _logFactory;
        private readonly ITimerFactory _timerFactory;
        private ITimer _timer;
        private ILogger _logger;
        public RunningTimeAttribute(ILogFactory logFactory, ITimerFactory timerFactory) {
            if(logFactory == null)
                throw new ArgumentNullException("logFactory");
            if(timerFactory == null)
                throw new ArgumentNullException("timerFactory");
            _logFactory = logFactory;
            _timerFactory = timerFactory;
        }
        public override void OnActionExecuting(HttpActionContext actionContext) {
            base.OnActionExecuting(actionContext);
            OnBeforeAction(actionContext);
        }
        public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext) {
            OnAfterAction(actionExecutedContext);
            base.OnActionExecuted(actionExecutedContext);
        }
        private void OnBeforeAction(HttpActionContext actionContext) {
            var controllerName = actionContext.ControllerContext.Controller.GetType().FullName;
            var actionName = actionContext.ActionDescriptor.ActionName;
            _logger = _logFactory.Create(controllerName);
            _logger.Trace("Action '"{0}'" begins execution", actionName);
            _timer = _timerFactory.Create();
            _timer.Start();
        }
        private void OnAfterAction(HttpActionExecutedContext actionExecutedContext) {
            var actionName = actionExecutedContext.ActionContext.ActionDescriptor.ActionName;
            _timer.Stop();
            _logger.Trace("Time elapsed for action '"{0}'": {1} msec", actionName, _timer.ElapsedMilliseconds);
        }
}

但是，操作筛选器充当singleton，因此当OnActionExecuted运行时，我不能确定_logger和_timer是否与为相同操作OnActionExecuting创建的对应。

例如。

1. Action Foo1开始执行。_logger = "logger1"、_timer = "timer1"
2. Action Foo2开始执行。_logger = "logger2"、_timer = "timer2"(它们被覆盖(
3. Action Foo1结束执行。它停止计时器并记录无意义的运行时间(end1-start2(

问题：有没有办法让我知道OnActionExecuted中它对应的OnActionExecuting？如果有一些操作的唯一标识符，我可以将其用作Dictionary的键，以存储任何与操作相关的对象，如记录器和计时器。有吗？或者其他解决方案？