/// <summary>
/// Calculates a new kpi value.
/// </summary>
/// <param name="keyTimeStamp">The timestamp which is used for the result object.</param>
/// <param name="minTimeStamp">The timestamp which is the minimum for current calculation step.</param>
/// <param name="maxTimeStamp">The maximum timestamp up to which to calculate the next kpi.</param>
/// <param name="calculationInterval">The interval from which to take all values from.</param>
internal override PerformanceAnalyzeResultBase Calculate(
DateTime keyTimeStamp,
DateTime minTimeStamp, DateTime maxTimeStamp,
TimeSpan calculationInterval)
{
if (!m_lastDurationItems.HasAny())
{
return(null);
}
else
{
// Throw away all items which are too old
foreach (var dummy in m_lastDurationItems.DequeueWhile((actItem) => actItem.Item1 < minTimeStamp))
{
}
// Check again wether we have any items
if (!m_lastDurationItems.HasAny())
{
return(null);
}
// Calculate result values
long minValue = long.MaxValue;
long maxValue = long.MinValue;
long sumValue = 0;
long itemCount = 0;
foreach (var actItem in m_lastDurationItems.PeekWhile((actTuple) => actTuple.Item1 < maxTimeStamp))
{
if (minValue > actItem.Item2)
{
minValue = actItem.Item2;
}
if (maxValue < actItem.Item2)
{
maxValue = actItem.Item2;
}
sumValue += actItem.Item2;
itemCount++;
}
// Check again wether we have any items
if (itemCount == 0)
{
return(null);
}
// Calculate average time value
long avgValue = sumValue / itemCount;
// Create result object
return(new DurationPerformanceResult(this, keyTimeStamp, avgValue, maxValue, minValue));
}
}
/// <summary>
/// Calculates a new kpi value based on given timestamp parameters.
/// </summary>
/// <param name="keyTimeStamp">The timestamp which is used for the result object.</param>
/// <param name="minTimeStamp">The timestamp which is the minimum for current calculation step.</param>
/// <param name="maxTimeStamp">The maximum timestamp up to which to calculate the next kpi.</param>
/// <param name="calculationInterval">The interval from which to take all values from.</param>
/// <returns></returns>
internal override PerformanceAnalyzeResultBase Calculate(
DateTime keyTimeStamp,
DateTime minTimeStamp, DateTime maxTimeStamp,
TimeSpan calculationInterval)
{
if (!m_lastReportedTimestamps.HasAny())
{
return(new FlowRatePerformanceResult(this, keyTimeStamp, 0.0));
}
else
{
// Throw away all items which are too old
foreach (var dummy in m_lastReportedTimestamps.DequeueWhile((actItem) => actItem < minTimeStamp))
{
}
// Check again wether we have any items
if (!m_lastReportedTimestamps.HasAny())
{
return(new FlowRatePerformanceResult(this, keyTimeStamp, 0.0));
}
// Counts all relevant items
double resultValue = (double)(m_lastReportedTimestamps
.PeekWhile((actTuple) => actTuple < maxTimeStamp)
.Count());
// Handle case where measured timespan in more less than the calculation timespan
TimeSpan currentValueTimespan = maxTimeStamp - minTimeStamp;
if (currentValueTimespan != calculationInterval)
{
double timespanFactor = (double)calculationInterval.Ticks / (double)currentValueTimespan.Ticks;
resultValue *= timespanFactor;
}
// Generate the result object
return(new FlowRatePerformanceResult(this, keyTimeStamp, resultValue));
}
}
