关于数据同步的一些思考与改进

• 另起一个线程作为定时任务,主要负责定时数据同步

• 正常情况下,每小时与Github进行数据同步.

• 一旦网站数据被更新,检查剩余同步时间是否大于30秒.
  ** 如果大于三十秒,强行把计时器剩余时间设置为30秒.
  ** 如果小于三十秒,不做操作.

• 计时器时间走完,立即同步数据到Github.

public class BlogsTimer
{
    private static Stack<int> _upFunnel; //沙漏上部分
    private static Stack<int> _downFunnel; //沙漏下部分
    private static readonly List<Action> TimerEvents; //定时执行的事件
    private static bool _timerSwitch; //沙漏开关
    private static readonly int Speed; //每秒消费令牌数量
    private static Thread _timerThread;
    private static readonly object TimerLock;
    static BlogsTimer()
    {
        _upFunnel = new Stack<int>();
        _downFunnel = new Stack<int>();
        Speed = 1 * 1000;
        TimerEvents = new List<Action>();
        TimerLock = new object();
    }
    //计时器开始
    public static void Start(TimeSpan timeSpan)
    {
        lock (TimerLock)
        {
            _upFunnel.Clear();
            _downFunnel.Clear();
            for (var i = 0; i < timeSpan.TotalSeconds; i++)
            {
                _upFunnel.Push(i);
            }
        }
        _timerSwitch = true;
        _timerThread = new Thread(Consume); //起一个线程消费桶里的令牌
        _timerThread.Start();
        LunchEvents(); // 触发事件
    }
    public static void Stop()
    {
        _timerSwitch = false;
    }

    //给沙漏注册定时执行事件
    public static void Register(Action timeEvent)
    {
        TimerEvents.Add(timeEvent);
        timeEvent.Invoke();
    }

    //把沙漏加速到指定的时间
    public static void AccelerateTo(TimeSpan timeSpan)
    {
        var accelerateSeconds = timeSpan.TotalSeconds;
        lock (TimerLock)
        {
            if (_upFunnel.Count < accelerateSeconds) //当前沙漏中剩余令牌小于设置中秒数,则返回不加速
                return;
            while (_upFunnel.Count > accelerateSeconds && _upFunnel.Count > 1) //令牌数大于秒数,则释放出多余令牌
            {
                _downFunnel.Push(_upFunnel.Pop());
            }
        }
    }
    private static void LunchEvents()
    {
        TimerEvents.ForEach(a => a.Invoke());
    }
    private static void Consume()
    {
        while (_timerSwitch)
        {
            lock (TimerLock)
            {
                if (_upFunnel.TryPop(out var item))
                {
                    _downFunnel.Push(item);
                }
                else
                {
                    LunchEvents();
                    var tempStack = _downFunnel; //旋转沙漏
                    _downFunnel = _upFunnel;
                    _upFunnel = tempStack;
                }
            }
            Thread.Sleep(Speed);
        }
    }
}