public MetricEvent Clone()
{
MetricEvent metricEvent = new MetricEvent()
{
TimeCreated = this.TimeCreated,
EventSource = this.EventSource,
TenantId = this.TenantId,
InstanceId = this.InstanceId,
AdditionalData = this.AdditionalData,
Name = this.Name,
TimeWindow = this.TimeWindow,
Count = this.Count,
Total = this.Total,
Average = this.Average,
Minimum = this.Minimum,
Maximum = this.Maximum
};
foreach (KeyValuePair <string, string> pair in this.Dimensions)
{
metricEvent.Dimensions.Add(pair.Key, pair.Value);
}
return(metricEvent);
}
static void UpdateMultipleTimeWindows(MetricEvent metricEvent, RollupAggregateTimeWindow[] aggregateTimeWindows)
{
Fx.Assert(aggregateTimeWindows.Length > 1, "AggregateTimeWindows array length greater than 1");
int countIncrement = metricEvent.Count / aggregateTimeWindows.Length;
int countRemainder = metricEvent.Count % aggregateTimeWindows.Length;
double total = metricEvent.Average * metricEvent.Count;
double totalIncrement = total / aggregateTimeWindows.Length;
// Spread the contributions of metricEvent.Count and metricEvent.Value evenly across the different time windows.
MetricEvent tempMetricEvent = metricEvent.Clone();
tempMetricEvent.Count = countIncrement;
tempMetricEvent.Total = totalIncrement;
tempMetricEvent.Average = totalIncrement / tempMetricEvent.Count;
for (int i = 0; i < aggregateTimeWindows.Length - 1; i++)
{
aggregateTimeWindows[i].Update(tempMetricEvent);
}
// Any remaining contribution is added to the last time window.
tempMetricEvent.Count = countIncrement + countRemainder;
tempMetricEvent.Total = total - ((aggregateTimeWindows.Length - 1) * totalIncrement);
tempMetricEvent.Average = tempMetricEvent.Total / tempMetricEvent.Count;
aggregateTimeWindows[aggregateTimeWindows.Length - 1].Update(tempMetricEvent);
}
void ConsumeMetricEvent(MetricEvent metricEvent)
{
if (this.processEventTestHook != null)
{
this.processEventTestHook(metricEvent);
}
}
// Check if we need to produce output events. Return true if we issued output
protected bool CleanExpiredTimeWindows()
{
bool issuedOutput = false;
// We only consider application time when computing the expiration time, not system time
DateTime cutOffTime = this.NewestEventTimeCreated - this.Settings.ExtraExpirationWaitTime;
// Find expired time windows
while (this.TimeWindowList.Count > 0)
{
AggregateTimeWindowBase timeWindow = this.TimeWindowList[0];
if (cutOffTime < timeWindow.EndTime)
{
break;
}
MetricEvent metricEvent = timeWindow.ProduceOutput();
issuedOutput = true;
// If the last output was a zero metric, don't continue to produce zero metrics
if (metricEvent.Count != 0)
{
this.OutputEventQueue.Enqueue(metricEvent);
}
this.EndTimeLastProducedEvent = timeWindow.EndTime;
this.TimeWindowList.RemoveAt(0);
}
return(issuedOutput);
}
public override MetricEvent ProduceOutput()
{
MetricEvent metricEvent = new MetricEvent()
{
Name = this.AggregateTimeWindow.Key.Metric,
TenantId = this.AggregateTimeWindow.Key.TenantId,
EventSource = this.AggregateTimeWindow.Key.EventSource,
InstanceId = this.AggregateTimeWindow.Key.InstanceId,
TimeCreated = this.AggregateTimeWindow.StartTime,
TimeWindow = this.AggregateTimeWindow.EndTime - this.AggregateTimeWindow.StartTime,
AdditionalData = this.AdditionalData,
Average = this.Value,
Total = this.Total,
Count = this.Count,
Minimum = this.Minimum.HasValue ? this.Minimum.Value : 0,
Maximum = this.Maximum.HasValue ? this.Maximum.Value : 0
};
if (this.AggregateTimeWindow.Key.Dimensions != null && this.AggregateTimeWindow.Key.Dimensions.Count > 0)
{
foreach (KeyValuePair <string, string> pair in this.AggregateTimeWindow.Key.Dimensions)
{
metricEvent.Dimensions.Add(pair.Key, pair.Value);
}
}
return(metricEvent);
}
public void Update(MetricEvent metricEvt)
{
AggregateGroupKey key = new AggregateGroupKey(
metricEvt.EventSource,
metricEvt.InstanceId,
metricEvt.TenantId,
metricEvt.Dimensions,
metricEvt.Name);
Queue <MetricEvent> writeOutputEventQueue = null;
lock (this.ThisLock)
{
// Lookup the correct time window queue
RollupAggregateTimeWindowQueue timeWindowQueue = this.GetOrCreateAggregateTimeWindowQueue(key);
// Update the time window queue
timeWindowQueue.Update(key, metricEvt);
// Check if we need to produce output events
writeOutputEventQueue = this.ProduceOutputEvents();
}
this.EnqueueOutputEvents(writeOutputEventQueue);
}
protected void EnqueueOutputEvents(Queue <MetricEvent> writeOutputEventQueue)
{
if (writeOutputEventQueue != null)
{
while (writeOutputEventQueue.Count > 0)
{
MetricEvent outputEvent = writeOutputEventQueue.Dequeue();
this.outputEventCallback(outputEvent);
}
}
}
protected bool ShouldDiscard(MetricEvent evt)
{
if (evt.TimeCreated < this.EndTimeLastProducedEvent)
{
/*
* ManagementEtwProvider.Provider.EventWriteMonitoringDropEvent(
* evt.Name, evt.EventSource, evt.TimeCreated.ToString(CultureInfo.InvariantCulture), this.EndTimeLastProducedEvent.ToString(CultureInfo.InvariantCulture));
*/
return(true);
}
return(false);
}
public override void Update(MetricEvent evt)
{
this.Count += evt.Count;
this.Total += evt.Total;
if (!string.IsNullOrEmpty(evt.AdditionalData))
{
this.AdditionalData = evt.AdditionalData;
}
if (!this.Maximum.HasValue || evt.Maximum > this.Maximum)
{
this.Maximum = evt.Maximum;
}
if (!this.Minimum.HasValue || evt.Minimum < this.Minimum)
{
this.Minimum = evt.Minimum;
}
}
void ProduceCurrentOutput()
{
if (this.TimeWindowList.Count > 0)
{
// Current output should be calculated over all existing time windows that are being tracking. The timestamp should be set to the earliest metric event.
MetricEvent currentMetricEvent = this.TimeWindowList[0].ProduceOutput();
currentMetricEvent.TimeWindow = AggregationDefaults.TimeWindowCurrent;
for (int i = 1; i < this.TimeWindowList.Count; i++)
{
MetricEvent metricEvent = this.TimeWindowList[i].ProduceOutput();
if (metricEvent.Count > 0)
{
currentMetricEvent.Total += metricEvent.Total;
currentMetricEvent.Count += metricEvent.Count;
if (metricEvent.Maximum > currentMetricEvent.Maximum)
{
currentMetricEvent.Maximum = metricEvent.Maximum;
}
if (metricEvent.Minimum > currentMetricEvent.Minimum)
{
currentMetricEvent.Minimum = metricEvent.Minimum;
}
if (!string.IsNullOrEmpty(metricEvent.AdditionalData))
{
currentMetricEvent.AdditionalData = metricEvent.AdditionalData;
}
}
}
if (currentMetricEvent.Count > 0)
{
currentMetricEvent.Average = currentMetricEvent.Total / currentMetricEvent.Count;
}
this.OutputEventQueue.Enqueue(currentMetricEvent);
}
}
public void Update(AggregateGroupKey key, MetricEvent evt)
{
Fx.Assert(evt.TimeWindow != AggregationDefaults.TimeWindowCurrent, "We don't support processing speculative metric events");
if (this.ShouldDiscard(evt))
{
return;
}
RollupAggregateTimeWindow[] aggregateTimeWindows = this.GetOrCreateAggregateTimeWindow(key, evt);
if (aggregateTimeWindows.Length == 1)
{
aggregateTimeWindows[0].Update(evt);
}
else
{
UpdateMultipleTimeWindows(evt, aggregateTimeWindows);
}
this.AdvanceTime(evt.TimeCreated);
this.ProduceCurrentOutput();
}
public abstract void Update(MetricEvent evt);
public void Update(MetricEvent evt)
{
this.State.Update(evt);
}
public void Publish(MetricEvent evt)
{
this.synopsis.Update(evt);
}
// Handles interval based events
RollupAggregateTimeWindow[] GetOrCreateAggregateTimeWindow(AggregateGroupKey key, MetricEvent metricEvent)
{
TimeSpan timeWindow = metricEvent.TimeWindow;
DateTimeOffset metricEndTime = metricEvent.TimeCreated.Add(timeWindow);
List <RollupAggregateTimeWindow> foundAggregateTimeWindows = new List <RollupAggregateTimeWindow>();
// Find the correct TimeWindow that the input event belongs to
foreach (RollupAggregateTimeWindow aggregateTimeWindow in this.TimeWindowList)
{
if ((metricEvent.TimeCreated >= aggregateTimeWindow.StartTime &&
metricEndTime <= aggregateTimeWindow.EndTime) ||
(metricEvent.TimeCreated <= aggregateTimeWindow.StartTime &&
metricEndTime >= aggregateTimeWindow.EndTime))
{
foundAggregateTimeWindows.Add(aggregateTimeWindow);
}
if (metricEndTime < aggregateTimeWindow.StartTime)
{
break;
}
}
// If the TimeWindow does not exist, create a new TimeWindow
if (foundAggregateTimeWindows.Count == 0)
{
RollupAggregateTimeWindow foundAggregateTimeWindow = RollupAggregateTimeWindow.Create(key, metricEvent.TimeCreated, timeWindow);
foundAggregateTimeWindows.Add(foundAggregateTimeWindow);
if (this.TimeWindowList.Count == 0)
{
this.AppendNewFoundTimeWindow(foundAggregateTimeWindow, RollupAggregateTimeWindow.Create(key, metricEvent.TimeCreated.Add(timeWindow), timeWindow));
}
else if (foundAggregateTimeWindow.StartTime >= this.TimeWindowList[this.TimeWindowList.Count - 1].EndTime)
{ // New TimeWindow belongs at the end.
this.FillMissingTimeWindowAtEnd(key, metricEvent.TimeCreated, timeWindow);
this.AppendNewFoundTimeWindow(foundAggregateTimeWindow, RollupAggregateTimeWindow.Create(key, metricEvent.TimeCreated.Add(timeWindow), timeWindow));
}
else
{ // New TimeWindow belongs at the beginning of the list.
this.FillMissingTimeWindowAtBeginning(key, foundAggregateTimeWindow.EndTime, timeWindow);
this.TimeWindowList.Insert(0, foundAggregateTimeWindow);
}
}
else
{ // In this case, we found matching time windows.
if (foundAggregateTimeWindows[foundAggregateTimeWindows.Count - 1].EndTime < metricEndTime)
{
// In this case, the input event partially overlaps existing time window objects. We need to create the remaining windows on the right side.
DateTime currentStartTime = foundAggregateTimeWindows[foundAggregateTimeWindows.Count - 1].EndTime;
TimeSpan currentTimeWindowSpan = foundAggregateTimeWindows[foundAggregateTimeWindows.Count - 1].TimeWindow;
while (currentStartTime < metricEndTime)
{
RollupAggregateTimeWindow currentTimeWindow = RollupAggregateTimeWindow.Create(key, currentStartTime, currentTimeWindowSpan);
foundAggregateTimeWindows.Add(currentTimeWindow);
this.TimeWindowList.Add(currentTimeWindow);
currentStartTime = currentStartTime.Add(currentTimeWindowSpan);
}
}
if (metricEvent.TimeCreated < foundAggregateTimeWindows[0].StartTime)
{
// In this case, the input event partially overlaps existing time window objects. We need to create the remaining windows on the left side.
DateTime currentStartTime = metricEvent.TimeCreated;
TimeSpan currentTimeWindowSpan = foundAggregateTimeWindows[0].TimeWindow;
List <RollupAggregateTimeWindow> tempTimeWindowList = new List <RollupAggregateTimeWindow>();
while (currentStartTime < foundAggregateTimeWindows[0].StartTime)
{
RollupAggregateTimeWindow currentTimeWindow = RollupAggregateTimeWindow.Create(key, currentStartTime, currentTimeWindowSpan);
tempTimeWindowList.Add(currentTimeWindow);
currentStartTime = currentStartTime.Add(currentTimeWindowSpan);
}
this.TimeWindowList.InsertRange(0, tempTimeWindowList);
foundAggregateTimeWindows.InsertRange(0, tempTimeWindowList);
}
}
return(foundAggregateTimeWindows.ToArray());
}
public abstract void Update(MetricEvent evt);
public void Update(MetricEvent evt)
{
this.State.Update(evt);
}
public override void Update(MetricEvent evt)
{
this.Count += evt.Count;
this.Total += evt.Total;
if (!string.IsNullOrEmpty(evt.AdditionalData))
{
this.AdditionalData = evt.AdditionalData;
}
if (!this.Maximum.HasValue || evt.Maximum > this.Maximum)
{
this.Maximum = evt.Maximum;
}
if (!this.Minimum.HasValue || evt.Minimum < this.Minimum)
{
this.Minimum = evt.Minimum;
}
}
public MetricEvent Clone()
{
MetricEvent metricEvent = new MetricEvent()
{
TimeCreated = this.TimeCreated,
EventSource = this.EventSource,
TenantId = this.TenantId,
InstanceId = this.InstanceId,
AdditionalData = this.AdditionalData,
Name = this.Name,
TimeWindow = this.TimeWindow,
Count = this.Count,
Total = this.Total,
Average = this.Average,
Minimum = this.Minimum,
Maximum = this.Maximum
};
foreach (KeyValuePair<string, string> pair in this.Dimensions)
{
metricEvent.Dimensions.Add(pair.Key, pair.Value);
}
return metricEvent;
}
public override MetricEvent ProduceOutput()
{
MetricEvent metricEvent = new MetricEvent()
{
Name = this.AggregateTimeWindow.Key.Metric,
TenantId = this.AggregateTimeWindow.Key.TenantId,
EventSource = this.AggregateTimeWindow.Key.EventSource,
InstanceId = this.AggregateTimeWindow.Key.InstanceId,
TimeCreated = this.AggregateTimeWindow.StartTime,
TimeWindow = this.AggregateTimeWindow.EndTime - this.AggregateTimeWindow.StartTime,
AdditionalData = this.AdditionalData,
Average = this.Value,
Total = this.Total,
Count = this.Count,
Minimum = this.Minimum.HasValue ? this.Minimum.Value : 0,
Maximum = this.Maximum.HasValue ? this.Maximum.Value : 0
};
if (this.AggregateTimeWindow.Key.Dimensions != null && this.AggregateTimeWindow.Key.Dimensions.Count > 0)
{
foreach (KeyValuePair<string, string> pair in this.AggregateTimeWindow.Key.Dimensions)
{
metricEvent.Dimensions.Add(pair.Key, pair.Value);
}
}
return metricEvent;
}
void ConsumeMetricEvent(MetricEvent metricEvent)
{
if (this.processEventTestHook != null)
{
this.processEventTestHook(metricEvent);
}
}
