private static void ProcessMetrics <TTelemetry>(
CollectionConfigurationAccumulator configurationAccumulatorLocal,
IEnumerable <CalculatedMetric <TTelemetry> > metrics,
TTelemetry telemetry,
out CollectionConfigurationError[] filteringErrors,
ref string projectionError)
{
filteringErrors = new CollectionConfigurationError[] { };
foreach (CalculatedMetric <TTelemetry> metric in metrics)
{
if (metric.CheckFilters(telemetry, out filteringErrors))
{
// the telemetry document has passed the filters, count it in and project
try
{
double projection = metric.Project(telemetry);
configurationAccumulatorLocal.MetricAccumulators[metric.Id].AddValue(projection);
}
catch (Exception e)
{
// most likely the projection did not result in a value parsable by double.Parse()
projectionError = e.ToString();
}
}
}
}
private void UpdateConfiguration(CollectionConfigurationInfo configurationInfo)
{
// we only get here if Etag in the header is different from the current one, but we still want to check if Etag in the body is also different
if (configurationInfo != null && !string.Equals(configurationInfo.ETag, this.currentConfigurationETag, StringComparison.Ordinal))
{
QuickPulseEventSource.Log.CollectionConfigurationUpdating(this.currentConfigurationETag, configurationInfo.ETag, string.Empty);
this.collectionConfigurationErrors.Clear();
CollectionConfigurationError[] errors = null;
try
{
errors = this.onUpdatedConfiguration?.Invoke(configurationInfo);
}
catch (Exception e)
{
QuickPulseEventSource.Log.CollectionConfigurationUpdateFailed(this.currentConfigurationETag, configurationInfo.ETag, e.ToInvariantString(), string.Empty);
this.collectionConfigurationErrors.Add(
CollectionConfigurationError.CreateError(
CollectionConfigurationErrorType.CollectionConfigurationFailureToCreateUnexpected,
string.Format(CultureInfo.InvariantCulture, "Unexpected error applying configuration. ETag: {0}", configurationInfo.ETag ?? string.Empty),
e,
Tuple.Create("ETag", configurationInfo.ETag)));
}
if (errors != null)
{
this.collectionConfigurationErrors.AddRange(errors);
}
this.currentConfigurationETag = configurationInfo.ETag;
}
}
private void UpdatePerformanceCollector(IEnumerable <Tuple <string, string> > performanceCountersToCollect, out CollectionConfigurationError[] errors)
{
// all counters that need to be collected according to the new configuration - remove duplicates
List <Tuple <string, string> > countersToCollect =
performanceCountersToCollect.GroupBy(counter => counter.Item1, StringComparer.Ordinal)
.Select(group => group.First())
.Concat(
QuickPulseDefaults.DefaultCountersToCollect.Select(defaultCounter => Tuple.Create(defaultCounter.Value, defaultCounter.Value)))
.ToList();
lock (this.performanceCollectorUpdateLock)
{
List <PerformanceCounterData> countersCurrentlyCollected = this.performanceCollector.PerformanceCounters.ToList();
IEnumerable <Tuple <string, string> > countersToRemove =
countersCurrentlyCollected.Where(
counter => !countersToCollect.Any(c => string.Equals(c.Item1, counter.ReportAs, StringComparison.Ordinal)))
.Select(counter => Tuple.Create(counter.ReportAs, counter.OriginalString));
IEnumerable <Tuple <string, string> > countersToAdd =
countersToCollect.Where(
counter => !countersCurrentlyCollected.Any(c => string.Equals(c.ReportAs, counter.Item1, StringComparison.Ordinal)));
// remove counters that should no longer be collected
foreach (var counter in countersToRemove)
{
this.performanceCollector.RemoveCounter(counter.Item2, counter.Item1);
}
var errorsList = new List <CollectionConfigurationError>();
// add counters that should now be collected
foreach (var counter in countersToAdd)
{
try
{
string error;
this.performanceCollector.RegisterCounter(counter.Item2, counter.Item1, out error, true);
if (!string.IsNullOrWhiteSpace(error))
{
errorsList.Add(
CollectionConfigurationError.CreateError(
CollectionConfigurationErrorType.PerformanceCounterParsing,
string.Format(CultureInfo.InvariantCulture, "Error parsing performance counter: '{0}'. {1}", counter, error),
null,
Tuple.Create("MetricId", counter.Item1)));
QuickPulseEventSource.Log.CounterParsingFailedEvent(error, counter.Item2);
continue;
}
QuickPulseEventSource.Log.CounterRegisteredEvent(counter.Item2);
}
catch (Exception e)
{
errorsList.Add(
CollectionConfigurationError.CreateError(
CollectionConfigurationErrorType.PerformanceCounterUnexpected,
string.Format(CultureInfo.InvariantCulture, "Unexpected error processing counter '{0}': {1}", counter, e.Message),
e,
Tuple.Create("MetricId", counter.Item1)));
QuickPulseEventSource.Log.CounterRegistrationFailedEvent(e.Message, counter.Item2);
}
}
errors = errorsList.ToArray();
}
}