/// <summary>Decay the stored counts for each user and clean as necessary.</summary>
/// <remarks>
/// Decay the stored counts for each user and clean as necessary.
/// This method should be called periodically in order to keep
/// counts current.
/// </remarks>
private void DecayCurrentCounts()
{
long total = 0;
IEnumerator <KeyValuePair <object, AtomicLong> > it = callCounts.GetEnumerator();
while (it.HasNext())
{
KeyValuePair <object, AtomicLong> entry = it.Next();
AtomicLong count = entry.Value;
// Compute the next value by reducing it by the decayFactor
long currentValue = count.Get();
long nextValue = (long)(currentValue * decayFactor);
total += nextValue;
count.Set(nextValue);
if (nextValue == 0)
{
// We will clean up unused keys here. An interesting optimization might
// be to have an upper bound on keyspace in callCounts and only
// clean once we pass it.
it.Remove();
}
}
// Update the total so that we remain in sync
totalCalls.Set(total);
// Now refresh the cache of scheduling decisions
RecomputeScheduleCache();
}