/// <summary>
/// Create IApiResult object with specified RateLimitDescription.
/// </summary>
/// <typeparam name="T">type of result</typeparam>
/// <param name="item">result item</param>
/// <param name="description">rate limit description</param>
/// <returns></returns>
public static IApiResult <T> Create <T>([NotNull] T item, RateLimitDescription description)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
return(new ApiResultImpl <T>(item, description.Limit, description.Remain, description.Reset));
}
protected override long CalculateIntervalTicks(TimeSpan remain, RateLimitDescription rld)
{
int count;
lock (_targetLists)
{
count = _targetLists.Count;
}
if (count == 0)
{
// list receiver is empty -> re-evaluate 5 seconds later.
return(TimeSpan.FromSeconds(5).Ticks);
}
// based on rate-limit description
var rldintv = (long)(remain.Ticks / (rld.Remain * ApiConsumptionLimitRatio));
// based on list count
var lcintv = TimeSpan.FromSeconds(BaseAccessIntervalSec).Ticks / count;
// choose larger interval
return(Math.Max(rldintv, lcintv));
}
protected virtual long CalculateIntervalTicks(TimeSpan remain, RateLimitDescription rld)
{
if (_lastRateLimitDescription != null)
{
// estimate api consumption
var delta = _lastRateLimitDescription.Value.Remain - rld.Remain;
if (delta > 0)
{
// sliding average
_averageApiConsumption = _averageApiConsumption * 0.3 + delta * 0.7;
}
}
else
{
_averageApiConsumption = rld.Limit - rld.Remain;
}
_lastRateLimitDescription = rld;
var inferCallableCount = rld.Remain * ApiConsumptionLimitRatio / _averageApiConsumption;
var tick = (long)(remain.Ticks / inferCallableCount);
var resetTick = (rld.Reset - DateTime.Now).Ticks;
// if calculated wait tick is after the reset tick, we should use reset tick.
return(Math.Min(tick, resetTick));
}
public ApiResultImpl(T result, long limit, long remain, DateTime reset)
{
RateLimit = new RateLimitDescription(limit, remain, reset);
Result = result;
}
protected virtual long CalculateIntervalTicks(TimeSpan remain, RateLimitDescription rld)
{
if (_lastRateLimitDescription != null)
{
// estimate api consumption
var delta = _lastRateLimitDescription.Value.Remain - rld.Remain;
if (delta > 0)
{
// sliding average
_averageApiConsumption = _averageApiConsumption * 0.3 + delta * 0.7;
}
}
else
{
_averageApiConsumption = rld.Limit - rld.Remain;
}
_lastRateLimitDescription = rld;
var inferCallableCount = rld.Remain * ApiConsumptionLimitRatio / _averageApiConsumption;
var tick = (long)(remain.Ticks / inferCallableCount);
var resetTick = (rld.Reset - DateTime.Now).Ticks;
// if calculated wait tick is after the reset tick, we should use reset tick.
return Math.Min(tick, resetTick);
}
protected override long CalculateIntervalTicks(TimeSpan remain, RateLimitDescription rld)
{
int count;
lock (_targetLists)
{
count = _targetLists.Count;
}
if (count == 0)
{
// list receiver is empty -> re-evaluate 5 seconds later.
return TimeSpan.FromSeconds(5).Ticks;
}
// based on rate-limit description
var rldintv = (long)(remain.Ticks / (rld.Remain * ApiConsumptionLimitRatio));
// based on list count
var lcintv = TimeSpan.FromSeconds(BaseAccessIntervalSec).Ticks / count;
// choose larger interval
return Math.Max(rldintv, lcintv);
}
