internal void Populate(Metric metric, DateTime now)
{
var summary = new Contracts.Summary();
var quantiles = new Quantile[_objectives.Count];
lock (_bufLock)
{
lock (_lock)
{
// Swap bufs even if hotBuf is empty to set new hotBufExpTime.
SwapBufs(now);
FlushColdBuf();
summary.SampleCount = _count;
summary.SampleSum = _sum;
for (var idx = 0; idx < _sortedObjectives.Length; idx++)
{
var rank = _sortedObjectives[idx];
var q = _headStream.Count == 0 ? double.NaN : _headStream.Query(rank);
quantiles[idx] = new Quantile
{
quantile = rank,
Value = q
};
}
}
}
if (quantiles.Length > 0)
{
Array.Sort(quantiles, _quantileComparer);
}
foreach (var quantile in quantiles)
{
summary.Quantiles.Add(quantile);
}
metric.Summary = summary;
}
internal void Init(ICollector parent, LabelValues labelValues, DateTime now)
{
base.Init(parent, labelValues);
_objectives = ((Summary)parent)._objectives;
_maxAge = ((Summary)parent)._maxAge;
_ageBuckets = ((Summary)parent)._ageBuckets;
_bufCap = ((Summary)parent)._bufCap;
_sortedObjectives = new double[_objectives.Count];
_hotBuf = new SampleBuffer(_bufCap);
_coldBuf = new SampleBuffer(_bufCap);
_streamDuration = new TimeSpan(_maxAge.Ticks / _ageBuckets);
_headStreamExpTime = now.Add(_streamDuration);
_hotBufExpTime = _headStreamExpTime;
_streams = new QuantileStream[_ageBuckets];
for (var i = 0; i < _ageBuckets; i++)
{
_streams[i] = QuantileStream.NewTargeted(_objectives);
}
_headStream = _streams[0];
for (var i = 0; i < _objectives.Count; i++)
{
_sortedObjectives[i] = _objectives[i].Quantile;
}
Array.Sort(_sortedObjectives);
_wireMetric = new Contracts.Summary();
foreach (var quantileEpsilonPair in _objectives)
{
_wireMetric.Quantiles.Add(new Quantile
{
quantile = quantileEpsilonPair.Quantile
});
}
}