public LeakyBucket(LimitRequestZone limitRequestZone, IDelay delay = null)
{
if (limitRequestZone == null)
{
throw new ArgumentNullException(nameof(limitRequestZone));
}
LimitRequestZone = limitRequestZone;
_delay = delay ?? TaskDelay.Instance;
_secondsPerRequest = LimitRequestZone.RequestRate.TimePerRequest;
var burst = limitRequestZone.Burst.HasValue ? limitRequestZone.Burst.Value : 1;
_Queue = Channel.CreateBounded <TaskToProcess>(burst);
_Slots = burst;
}
public static bool TryParse(string str, out LimitRequestZone limitRequestZone)
{
if (str == null)
{
throw new ArgumentNullException(nameof(str));
}
limitRequestZone = null;
str = str.Trim();
var parts = str.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Select(p => p.Trim().ToLowerInvariant()).ToList();
string name = null;
int? burst = null;
bool nodelay = false;
RequestRate requestRate = null;
foreach (var p in parts)
{
if (p.StartsWith("zone=", StringComparison.OrdinalIgnoreCase))
{
if (name != null)
{
return(false);
}
name = p.Substring("zone=".Length);
var split = name.IndexOf(":", StringComparison.OrdinalIgnoreCase);
if (split != -1)
{
return(false);
}
}
else if (p.StartsWith("burst=", StringComparison.OrdinalIgnoreCase))
{
if (burst != null)
{
return(false);
}
if (!int.TryParse(p.Substring("burst=".Length), out int v))
{
return(false);
}
if (v <= 0)
{
return(false);
}
burst = v;
}
else if (p.Equals("nodelay", StringComparison.OrdinalIgnoreCase))
{
if (nodelay)
{
return(false);
}
nodelay = true;
}
else if (p.StartsWith("rate=", StringComparison.OrdinalIgnoreCase))
{
if (requestRate != null)
{
return(false);
}
var v = p.Substring("rate=".Length);
if (!RequestRate.TryParse(v, out requestRate))
{
return(false);
}
}
else
{
return(false);
}
}
if (requestRate == null || string.IsNullOrEmpty(name))
{
return(false);
}
limitRequestZone = new LimitRequestZone(name, burst, nodelay, requestRate);;
return(true);
}