如何限制每个时间量的方法,使用情况如何? [英] How to limit method usage per amount of time?
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问题描述
它是微不足道的,但我就是无法通过它。
我有限制的任务量(假设连接,发送的电子邮件或点击的按钮),每个时间。因此,如我可以每小时发送1000封电子邮件。
我该怎么做,在C#?我不知道和不关心每一个操作都会多少时间。我只是想确保了最后一小时,仅1000将被执行。
解决方案
类EventLimiter
{
问答LT; DateTime的> requestTimes;
INT maxRequests;
时间跨度时间跨度;
公共EventLimiter(INT maxRequests,时间跨度时间跨度)
{
this.maxRequests = maxRequests;
this.timeSpan =时间跨度;
requestTimes =新的问答LT; DateTime的>(maxRequests);
}
私人无效SynchronizeQueue()
{
,而((requestTimes.Count大于0)及和放大器;(requestTimes.Peek()添加(时间跨度)LT; DateTime.UtcNow))
requestTimes.Dequeue();
}
公共BOOL CanRequestNow()
{
SynchronizeQueue();
返回requestTimes.Count< maxRequests;
}
公共无效EnqueueRequest()
{
,而(!CanRequestNow())
的Thread.Sleep(requestTimes.Peek()。添加(时间跨度).Subtract(DateTime.UtcNow));
//为:System.Threading.Thread.Sleep(1000);
requestTimes.Enqueue(DateTime.UtcNow);
}
}
It has to be trivial, but I just cannot get through it. I have to limit amount of tasks (let's say connections, emails sent or clicks in the button) per amount of time. So e.g. I can send 1000 emails per hour.
How can I do that in c#? I don't know and don't care how much time each operation will take. I just want to make sure that for last hour, only 1000 will be executed.
解决方案
class EventLimiter
{
Queue<DateTime> requestTimes;
int maxRequests;
TimeSpan timeSpan;
public EventLimiter(int maxRequests, TimeSpan timeSpan)
{
this.maxRequests = maxRequests;
this.timeSpan = timeSpan;
requestTimes = new Queue<DateTime>(maxRequests);
}
private void SynchronizeQueue()
{
while ((requestTimes.Count > 0) && (requestTimes.Peek().Add(timeSpan) < DateTime.UtcNow))
requestTimes.Dequeue();
}
public bool CanRequestNow()
{
SynchronizeQueue();
return requestTimes.Count < maxRequests;
}
public void EnqueueRequest()
{
while (!CanRequestNow())
Thread.Sleep(requestTimes.Peek().Add(timeSpan).Subtract(DateTime.UtcNow));
// Was: System.Threading.Thread.Sleep(1000);
requestTimes.Enqueue(DateTime.UtcNow);
}
}
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