public static IHistogram Histogram(App.Metrics.IMetrics context, string name, Units unit, SamplingTypes samplingType, List <KeyValuePair <string, string> > tags = null)
{
var options = new App.Metrics.Histogram.HistogramOptions
{
MeasurementUnit = unit.GetUnit(),
Name = name,
Tags = tags.GetTags()
};
switch (samplingType)
{
case SamplingTypes.FavorRecent:
options.Reservoir = () => new App.Metrics.ReservoirSampling.ExponentialDecay.DefaultForwardDecayingReservoir(1024, 0.015, 0);
break;
case SamplingTypes.LongTerm:
options.Reservoir = () => new App.Metrics.ReservoirSampling.Uniform.DefaultAlgorithmRReservoir(1024);
break;
case SamplingTypes.SlidingWindow:
options.Reservoir = () => new App.Metrics.ReservoirSampling.SlidingWindow.DefaultSlidingWindowReservoir(1024);
break;
default:
throw new ArgumentOutOfRangeException(nameof(samplingType), samplingType, null);
}
return(new Histogram(context.Provider.Histogram.Instance(options)));
}
private static void MeasureLength(IMetrics metrics, string shortSha)
{
var length = shortSha.Length;
var startsWith = shortSha.First().ToString();
var measurement = new App.Metrics.Histogram.HistogramOptions
{
Name = "ShortShaKeyLength",
MeasurementUnit = Unit.Bytes,
Tags = new MetricTags("starts with", startsWith)
};
metrics?.Measure?.Histogram.Update(measurement, length);
}
