public TelemetryEtwSink(
ITelemetryWriter telemetryWriter,
string clusterId,
string tenantId,
string clusterType,
string serviceFabricVersion,
string nodeName,
bool isScaleMin,
TelemetryScheduler telemetryScheduler)
{
string clusterDevType = isScaleMin.ToString();
this.telemetryWriter = telemetryWriter;
// creating filter to only aggregate traces which are white-listed
this.telemetryFilter = new TelemetryFilter();
// creating the unique identifier of the cluster/node
this.telemetryIdentifier = new TelemetryIdentifiers(clusterId, tenantId, nodeName);
// getting path to where telemetry will be persisted
Utility.CreateWorkSubDirectory(
Utility.TraceSource,
LogSourceId,
TelemetryWorkSubDirectoryKey,
AggregationPersistenceFolder,
Utility.DcaWorkFolder,
out this.telemetryPersistFilePath);
this.telemetryPersistFilePath = Path.Combine(this.telemetryPersistFilePath, TelemetryEtwSink.TelemetryPersistFileName);
// initializing the collection of telemetry (first it tries to load it from file, if fails an empty collection is created)
bool telCollectionloadedFromDisk;
this.telemetryCollection = TelemetryCollection.LoadOrCreateTelemetryCollection(this.telemetryPersistFilePath, this.telemetryIdentifier, telemetryScheduler.DailyPushes, out telCollectionloadedFromDisk, Utility.TraceSource.WriteError);
// updating the scheduling for sending telemetry based on the persisted (or not persisted) telemetryCollection.
telemetryScheduler.UpdateScheduler(telCollectionloadedFromDisk, this.telemetryCollection.TotalPushes > 0, this.telemetryCollection.PushTime, DateTime.Now.ToLocalTime().TimeOfDay);
this.telemetryCollection.PushTime = telemetryScheduler.PushTime;
// creating environment telemetry and including it in the collection
this.environmentTelemetry = new EnvironmentTelemetry(
clusterType,
serviceFabricVersion,
clusterDevType);
this.telemetryCollection.Aggregate(this.environmentTelemetry);
this.telemetryPerformanceInstrumentation = new TelemetryPerformanceInstrumentation();
this.telemetryCollection.Aggregate(this.telemetryPerformanceInstrumentation);
this.telemetryLock = new object();
Utility.TraceSource.WriteInfo(LogSourceId, "{0}, Initial send telemetry delay of {1} at a frequency of every {2} minutes.", this.telemetryIdentifier, telemetryScheduler.SendDelay, telemetryScheduler.SendInterval.TotalMinutes);
this.telemetrySendTimer = new System.Threading.Timer(this.SendTelemetry, null, telemetryScheduler.SendDelay, telemetryScheduler.SendInterval);
}
public static void Aggregate(this TelemetryCollection telemetryCollection, TelemetryPerformanceInstrumentation telPerfInstrumentation)
{
telemetryCollection.Aggregate(
telPerfInstrumentation.TraceAggregationCfg,
string.Empty,
telPerfInstrumentation.Metrics,
new Dictionary <string, string>(),
DateTime.UtcNow);
// the stop watch has to reset everytime the aggregation happens so that the accumulation in sum represents the total time
// this is necessary so that it supports loading the accumulation from the persisted value.
telPerfInstrumentation.ProcessingEventsMeasuredTimeReset();
}