/// <inheritdoc />
public sealed override void Start()
{
Listener.ActivityStopped = activity =>
{
var serviceAttribute = activity.Tags.FirstOrDefault(tag => tag.Key == OuterRequestSpans.Attributes.Service);
if (serviceAttribute.Value == null)
{
return;
}
if (_serviceThresholds.TryGetValue(serviceAttribute.Value, out var threshold))
{
if (activity.Duration > threshold)
{
var summary = ThresholdSummary.FromActivity(activity);
ThresholdServiceQueue.AddByService(serviceAttribute.Value, summary);
}
}
};
Listener.SampleUsingParentId = (ref ActivityCreationOptions <string> activityOptions) =>
ActivitySamplingResult.AllData;
Listener.Sample = (ref ActivityCreationOptions <ActivityContext> activityOptions) =>
ActivitySamplingResult.AllData;
Listener.ShouldListenTo = s => true;
}
public ThresholdTraceListener(ILoggerFactory loggerFactory, ThresholdOptions options)
{
var thresholdOptions1 = options;
var logger = loggerFactory.CreateLogger <RequestTracer>();
_timer = new Timer(GenerateAndLogReport, logger, thresholdOptions1.EmitInterval, thresholdOptions1.EmitInterval);
ThresholdServiceQueue.SetSampleSize((int)thresholdOptions1.SampleSize);//change to uint
_serviceThresholds = options.GetServiceThresholds();
Start();
}
private static void GenerateAndLogReport(object state)
{
ILogger logger = null;
try
{
logger = state as ILogger;
var reportSummaries = ThresholdServiceQueue.ReportSummaries();
var reportJson = JObject.FromObject(reportSummaries);
if (reportJson.HasValues)
{
logger?.LogInformation(LoggingEvents.ThresholdEvent, reportJson.ToString(Formatting.None));
}
}
catch (Exception e)
{
logger?.LogError(e, "ThresholdRequestLogging report generation failed.");
}
}