private async Task AggregatorLoopAsync()
{
while (_isDisposed == false)
{
try
{
// Wait for end end of the aggregation period:
await Task.Delay(AggregationPeriod).ConfigureAwait(continueOnCapturedContext: false);
if (_isDisposed)
{
break;
}
// Atomically snap the current aggregation:
MetricAggregator nextAggregator = new MetricAggregator(DateTimeOffset.UtcNow);
if (_aggregator == null)
{
_aggregator = nextAggregator;
continue;
}
MetricAggregator prevAggregator = Interlocked.Exchange(ref _aggregator, nextAggregator);
// Only send anything is at least one value was measured:
if (prevAggregator != null && prevAggregator.Count > 0)
{
// Compute the actual aggregation period length:
TimeSpan aggPeriod = nextAggregator.StartTimestamp - prevAggregator.StartTimestamp;
if (aggPeriod.TotalMilliseconds < 1)
{
aggPeriod = TimeSpan.FromMilliseconds(1);
}
foreach (var sink in _sinks)
{
try
{
sink.TrackMetric(
Name,
prevAggregator.Count,
prevAggregator.Sum,
prevAggregator.Min,
prevAggregator.Max,
prevAggregator.StandardDeviation,
aggPeriod,
prevAggregator.StartTimestamp,
_properties
);
}catch (Exception ex) {
}
}
}
}
catch (Exception ex)
{
}
}
}
public void TrackValue(double value)
{
MetricAggregator currAggregator = _aggregator;
if (currAggregator != null)
{
currAggregator.TrackValue(value);
}
}
public Metric(string name, ITelemetrySink[] sinks, IDictionary <string, string> properties = null)
{
this.Name = name ?? "null";
this._aggregator = new MetricAggregator(DateTimeOffset.UtcNow);
this._sinks = sinks ?? throw new ArgumentNullException(nameof(sinks));
_properties = properties;
Task.Run(this.AggregatorLoopAsync);
}
void IDisposable.Dispose()
{
_isDisposed = true;
_aggregator = null;
}
