/// <summary>
/// Add the specified custom sampled metric sample object to the collection
/// </summary>
/// <param name="newMetricSample">The new custom sampled metric object to add</param>
public void Add(EventMetricSample newMetricSample)
{
if (newMetricSample == null)
{
throw new ArgumentNullException(nameof(newMetricSample), "A new custom sampled metric sample object must be provided to add it to the collection.");
}
//our base object does all the work
base.Add(newMetricSample);
}
private MetricValueCollection OnCalculateValuesShortest(DateTimeOffset startDateTime, DateTimeOffset endDateTime, IEventMetricValueDefinition trendValue)
{
//there are two possibilities for unit caption: Either use the caption from the trend definition or, if that's null, we'll just do Count.
string unitCaption = null;
if (trendValue != null)
{
unitCaption = trendValue.UnitCaption;
}
if (string.IsNullOrEmpty(unitCaption))
{
unitCaption = "Events";
}
MetricValueCollection newMetricValueCollection;
if (trendValue == null)
{
//initialize with our metric object for default caption/description behavior
newMetricValueCollection = new MetricValueCollection(this, MetricSampleInterval.Shortest, 0, unitCaption);
}
else
{
//initialize with our trend for trend-specific captions and descriptions
newMetricValueCollection = new MetricValueCollection((EventMetricValueDefinition)trendValue, MetricSampleInterval.Shortest, 0, unitCaption);
}
double lastValue = 0.0;
//First, we need to find the value for the start date & time and the sample index into the collection.
for (int curSampleIndex = 0; curSampleIndex < Samples.Count; curSampleIndex++)
{
//get the sample on deck
EventMetricSample curSample = Samples[curSampleIndex];
//Is this sample in our range?
if (curSample.Timestamp >= startDateTime)
{
//Go ahead and calculate the value, adding it to our set. We don't use a baseline because we're looking at each individual value.
CalculateSample(newMetricValueCollection, new List <EventMetricSample>(new[] { curSample }), lastValue, curSampleIndex, curSample.Timestamp, (EventMetricValueDefinition)trendValue);
}
else if (curSample.Timestamp > endDateTime)
{
//we're done - there are no more samples to consider, break out of the for loop
break;
}
}
return(newMetricValueCollection);
}
/// <summary>
/// Add a new custom sampled metric sample from the specified sample packet
/// </summary>
/// <param name="newMetricSamplePacket">The sample packet to create a new metric sample object from</param>
internal EventMetricSample Add(EventMetricSamplePacket newMetricSamplePacket)
{
if (newMetricSamplePacket == null)
{
throw new ArgumentNullException(nameof(newMetricSamplePacket), "A new custom sampled metric sample packet object must be provided to add it to the collection.");
}
//now we have to create a new sample object to wrap the provided packet
EventMetricSample newMetricSample = new EventMetricSample(m_EventMetric, newMetricSamplePacket);
//and forward to our normal add routine
Add(newMetricSample);
//returning our new wrapped object
return(newMetricSample);
}
private MetricValueCollection OnCalculateValuesInterval(MetricSampleInterval interval, int intervals, DateTimeOffset startDateTime, DateTimeOffset endDateTime, IEventMetricValueDefinition trendValue)
{
//there are two possibilities for unit caption: Either use the caption from the trend definition or, if that's null, we'll just do Count.
string unitCaption = null;
if (trendValue != null)
{
unitCaption = trendValue.UnitCaption;
}
if (string.IsNullOrEmpty(unitCaption))
{
unitCaption = "Events";
}
MetricValueCollection newMetricValueCollection;
if (trendValue == null)
{
//initialize with our metric object for default caption/description behavior
newMetricValueCollection = new MetricValueCollection(this, interval, intervals, unitCaption);
}
else
{
//initialize with our trend for trend-specific captions and descriptions
newMetricValueCollection = new MetricValueCollection((EventMetricValueDefinition)trendValue, interval, intervals, unitCaption);
}
//And prep for our process loop
DateTimeOffset windowStartDateTime = startDateTime;
DateTimeOffset windowEndDateTime = CalculateOffset(windowStartDateTime, interval, intervals);
double lastValue = 0.0;
//now loop through all of the intervals in the range to create the sample ranges.
int lastUsedSampleIndex = 0;
while (windowStartDateTime < endDateTime)
{
//find all of the samples in the current range...
List <EventMetricSample> samples = new List <EventMetricSample>();
for (int curSampleIndex = lastUsedSampleIndex; curSampleIndex < Samples.Count; curSampleIndex++)
{
//get the sample on deck
EventMetricSample curSample = Samples[curSampleIndex];
//if we're outside of the window (before or after) then break out because we've found this whole bucket.
if ((curSample.Timestamp < windowStartDateTime) || (curSample.Timestamp > windowEndDateTime))
{
//we'll need to look at this sample in the next window to see if it fits.
lastUsedSampleIndex = curSampleIndex;
break;
}
//this sample is in the bucket
samples.Add(curSample);
}
//add a metric value for this bucket now that we know everything in it.
lastValue = CalculateSample(newMetricValueCollection, samples, lastValue, lastUsedSampleIndex, windowEndDateTime, (EventMetricValueDefinition)trendValue);
//and now we have recorded a metric value for the requested date & time if possible, move that forward.
windowStartDateTime = windowEndDateTime; //we're moving on to the next window
windowEndDateTime = CalculateOffset(windowEndDateTime, interval, intervals);
//if the target is beyond our end date & time, set to the end date and time so we calculate our last sample
if (windowEndDateTime > endDateTime)
{
windowEndDateTime = endDateTime;
}
}
return(newMetricValueCollection);
}
