public static async Task <ITokenBucket> GetTokenBucketAsync(CustomerThrottle customerThrottle)
{
return(await TokenBuckets.BucketWithFixedIntervalRefillStrategy(
capacity : (long)customerThrottle.MaximumRequestsPerSecond,
refillTokens : (long)customerThrottle.MaximumRequestsPerSecond,
period : oneSecond).ConfigureAwait(false));
}
public async Task RateLimitTests()
{
const int totalConsumes = 500;
const int refillRate = 40;
//initial capacity 40
//add 1 token to the bucket ~ every 25ms
var tokenBucket = await TokenBuckets.BucketWithFixedIntervalRefillStrategy(refillRate, 1, TimeSpan.FromMilliseconds(1000d / refillRate))
.ConfigureAwait(false);
var sw = new Stopwatch();
sw.Start();
for (var i = 0; i < totalConsumes; i++)
{
await tokenBucket.WaitConsumeAsync().ConfigureAwait(false);
}
sw.Stop();
// tokens consumed / time = refillRate
Assert.That(totalConsumes / (sw.Elapsed.TotalSeconds + 1), Is.EqualTo(refillRate).Within(0.2));
}