public RateLimiterRule Occur(IDateTime dateTime)
{
var current = _counterQueue.LastOrDefault();
if (current == null || current.Start < dateTime.GetUtcNow().AddMinutes(-1))
{
current = new MinuteCounter(dateTime.GetUtcNow());
lock (_syncLock)
{
_counterQueue.Add(current);
while (_counterQueue.Count > _minutesToRetainCount)
{
_counterQueue.RemoveAt(0);
}
}
}
foreach (var rule in _rules)
{
var count = _counterQueue
.Where(c => c.Start >= dateTime.GetUtcNow().AddMinutes(-rule.Minutes))
.Sum(c => c.Count);
if (count >= rule.Count)
{
return(rule);
}
}
current.Count++;
return(null);
}