internal static void ValidateSlidingWindowAndBucketLength(TimeSpan slidingWindowLength, TimeSpan bucketLength)
{
ExAssert.RetailAssert(bucketLength >= SlidingWindow.MinBucketLength, "bucketLength: [{0}] must be at least [{1}].", new object[]
{
bucketLength,
SlidingWindow.MinBucketLength
});
ExAssert.RetailAssert(slidingWindowLength > TimeSpan.Zero, "slidingWindowLength: [{0}] must be greater than zero.", new object[]
{
slidingWindowLength
});
ExAssert.RetailAssert(bucketLength < slidingWindowLength, "bucketLength: [{0}] must be less than slidingWindowLength: [{1}]", new object[]
{
bucketLength,
slidingWindowLength
});
ExAssert.RetailAssert(slidingWindowLength <= SlidingWindow.MaxSlidingWindowLength, "slidingWindowLength: [{0}] must be less than or equal to slidingWindowLength: [{1}]", new object[]
{
slidingWindowLength,
SlidingWindow.MaxSlidingWindowLength
});
ExAssert.RetailAssert(slidingWindowLength.Ticks % bucketLength.Ticks == 0L, "slidingWindowLength: [{0}] must be a multiple of bucketLength: [{1}]", new object[]
{
slidingWindowLength,
bucketLength
});
}
protected void ExpireBucketsIfNecessary()
{
ExAssert.RetailAssert(this.ValueBuckets != null, "Child class did not create a ValueBuckets array");
if (this.ValueBuckets.Length != this.NumberOfBuckets)
{
ExAssert.RetailAssert(false, "The child class did not define the appropriate number of elements in the ValueBuckets array. Expected: {0}, Actual: {1}", new object[]
{
this.NumberOfBuckets,
this.ValueBuckets.Length
});
}
DateTime d = this.currentTimeProvider();
long num = (d - this.creationTime).Ticks / this.BucketLength.Ticks;
int num2 = 0;
while (num2 < this.ValueBuckets.Length && this.totalBucketsExpired < num)
{
this.currentBucket = (this.currentBucket + 1) % this.ValueBuckets.Length;
this.ExpireBucket(this.currentBucket);
this.filled[this.currentBucket] = false;
this.totalBucketsExpired += 1L;
num2++;
}
this.totalBucketsExpired = num;
}
public static void RetailAssert(bool condition, string formatString)
{
if (!condition)
{
ExAssert.AssertInternal(formatString, null);
}
}
public static void RetailAssert(bool condition, string formatString, params object[] parameters)
{
if (!condition)
{
ExAssert.AssertInternal(formatString, parameters);
}
}
protected SlidingWindow(TimeSpan slidingWindowLength, TimeSpan bucketLength, Func <DateTime> currentTimeProvider)
{
SlidingWindow.ValidateSlidingWindowAndBucketLength(slidingWindowLength, bucketLength);
ExAssert.RetailAssert(currentTimeProvider != null, "Current time provider should not be null.");
this.BucketLength = bucketLength;
this.currentTimeProvider = currentTimeProvider;
this.creationTime = this.currentTimeProvider();
this.NumberOfBuckets = (int)(slidingWindowLength.Ticks / this.BucketLength.Ticks);
this.filled = new bool[this.NumberOfBuckets];
}
public MultiGranularityPercentileCounter(TimeSpan expiryInterval, TimeSpan granularityInterval, MultiGranularityPercentileCounter.Param[] parameters, CurrentTimeProvider currentTimeProvider)
{
this.count = parameters.Length;
ExAssert.RetailAssert(this.count > 0, "Number of parameters: {0} must be greater than zero.", new object[]
{
this.count
});
for (int i = 0; i < this.count - 1; i++)
{
ExAssert.RetailAssert(parameters[i].Granularity < parameters[i + 1].Granularity, "The granularities must be sorted.");
ExAssert.RetailAssert(parameters[i].Range < parameters[i + 1].Range, "The ranges must be sorted.");
ExAssert.RetailAssert(parameters[i].Range % parameters[i + 1].Granularity == 0L, "The range[i] MOD granularity[i + 1] must be zero.");
}
this.percentileCounters = new PercentileCounter[this.count];
this.borderBuckets = new long[this.count];
for (int j = 0; j < this.count; j++)
{
this.percentileCounters[j] = new PercentileCounter(expiryInterval, granularityInterval, parameters[j].Granularity, parameters[j].Range, currentTimeProvider);
this.borderBuckets[j] = parameters[j].Range - parameters[j].Granularity;
}
}
public Param(long granularity, long range)
{
ExAssert.RetailAssert(range % granularity == 0L, "The range MOD granularity must be zero.");
this.granularity = granularity;
this.range = range;
}