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using System;
namespace Kaleida.ServiceMonitor.Model.Statistics
{
public class AggregateDurationCalculator
{
private long? minimumTicks ;
private long? maximumTicks ;
private long? meanTicks ;
private long? recentTicks ;
private int count;
public void AddResult(TimeSpan duration)
{
count++;
if (meanTicks == null)
{
meanTicks = duration.Ticks;
}
else
{
long difference = duration.Ticks - meanTicks.Value;
meanTicks += (difference / count);
}
if (minimumTicks == null || duration.Ticks < minimumTicks.Value)
{
minimumTicks = duration.Ticks;
}
if (maximumTicks == null || duration.Ticks > maximumTicks.Value)
{
maximumTicks = duration.Ticks;
}
recentTicks = duration.Ticks;
}
public TimeSpan? GetMean()
{
if (meanTicks == null)
return null;
return TimeSpan.FromTicks(meanTicks.Value);
}
public TimeSpan? GetMinimum()
{
return minimumTicks == null ? (TimeSpan?) null : TimeSpan.FromTicks(minimumTicks.Value);
}
public TimeSpan? GetMaximum()
{
return maximumTicks == null ? (TimeSpan?) null : TimeSpan.FromTicks(maximumTicks.Value);
}
public TimeSpan? GetMostRecent()
{
return recentTicks == null ? (TimeSpan?)null : TimeSpan.FromTicks(recentTicks.Value);
}
public void Reset()
{
meanTicks = null;
minimumTicks = null;
maximumTicks = null;
recentTicks = null;
count = 0;
}
}
}
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Stuart Wheelwright is the Principal Architect and Software Developer at
BlackJet Software Ltd.
He has over 16 years commercial experience producing robust, maintainable, web-based solutions and bespoke systems for Microsoft platforms.
His latest project is
Shopping UK, an elegantly simple shopping list for iPhone.