/// <summary>
/// Initializes a new instance of the <see cref="AdaptiveSamplingTelemetryProcessor"/> class.
/// <param name="settings">Sampling percentage estimator settings.</param>
/// <param name="callback">Callback invoked every time sampling percentage is evaluated.</param>
/// <param name="next">Next TelemetryProcessor in call chain.</param>
/// </summary>
public AdaptiveSamplingTelemetryProcessor(
SamplingPercentageEstimatorSettings settings,
AdaptiveSamplingPercentageEvaluatedCallback callback,
ITelemetryProcessor next)
{
this.estimatorSettings = settings;
this.evaluationCallback = callback;
// make estimatortelemetry processor work after sampling was done
this.estimatorProcessor = new SamplingPercentageEstimatorTelemetryProcessor(settings, this.SamplingPercentageChanged, next);
this.samplingProcessor = new SamplingTelemetryProcessor(this.estimatorProcessor);
}
/// <summary>
/// Initializes a new instance of the <see cref="AdaptiveSamplingTelemetryProcessor"/> class.
/// <param name="settings">Sampling percentage estimator settings.</param>
/// <param name="callback">Callback invoked every time sampling percentage is evaluated.</param>
/// <param name="next">Next TelemetryProcessor in call chain.</param>
/// </summary>
public AdaptiveSamplingTelemetryProcessor(
SamplingPercentageEstimatorSettings settings,
AdaptiveSamplingPercentageEvaluatedCallback callback,
ITelemetryProcessor next)
{
this.estimatorSettings = settings;
this.evaluationCallback = callback;
// make estimatortelemetry processor work after sampling was done
this.estimatorProcessor = new SamplingPercentageEstimatorTelemetryProcessor(settings, this.SamplingPercentageChanged, next);
this.samplingProcessor = new SamplingTelemetryProcessor(this.estimatorProcessor);
}
public void TelemetryItemHasSamplingPercentageSet()
{
var sentTelemetry = new List<ITelemetry>();
var processor = new SamplingTelemetryProcessor(new StubTelemetryProcessor(null) { OnProcess = t => sentTelemetry.Add(t) });
processor.SamplingPercentage = 20;
do
{
processor.Process(new RequestTelemetry());
}
while (sentTelemetry.Count == 0);
Assert.Equal(20, ((ISupportSampling)sentTelemetry[0]).SamplingPercentage);
}
public void AllTelemetryIsSentWithDefaultSamplingRate()
{
var sentTelemetry = new List<ITelemetry>();
var processor = new SamplingTelemetryProcessor(new StubTelemetryProcessor(null) { OnProcess = t => sentTelemetry.Add(t) });
const int ItemsToGenerate = 100;
for (int i = 0; i < ItemsToGenerate; i++)
{
processor.Process(new RequestTelemetry());
}
Assert.Equal(ItemsToGenerate, sentTelemetry.Count);
}
/// <summary>
/// Initializes a new instance of the <see cref="AdaptiveSamplingTelemetryProcessor"/> class.
/// <param name="settings">Sampling percentage estimator settings.</param>
/// <param name="callback">Callback invoked every time sampling percentage is evaluated.</param>
/// <param name="next">Next TelemetryProcessor in call chain.</param>
/// </summary>
public AdaptiveSamplingTelemetryProcessor(
Channel.Implementation.SamplingPercentageEstimatorSettings settings,
Channel.Implementation.AdaptiveSamplingPercentageEvaluatedCallback callback,
ITelemetryProcessor next)
{
this.estimatorSettings = settings;
this.evaluationCallback = callback;
// make estimator telemetry processor work after sampling was done
this.estimatorProcessor = new SamplingPercentageEstimatorTelemetryProcessor(settings, this.SamplingPercentageChanged, next);
this.samplingProcessor = new SamplingTelemetryProcessor(next, this.estimatorProcessor)
{
SamplingPercentage = this.estimatorSettings.InitialSamplingPercentage,
};
}
public void DefaultSamplingRateIs100Percent()
{
var processor = new SamplingTelemetryProcessor(new StubTelemetryProcessor(null));
Assert.Equal(processor.SamplingPercentage, 100.0, 12);
}