public SummaryChild(Summary parent)
{
this.parentName = parent.Name;
this.objectives = parent.objectives;
this.maxAge = parent.maxAge;
this.ageBuckets = parent.ageBuckets;
this.bufCap = parent.bufCap;
this.sortedObjectives = new double[this.objectives.Count];
this.hotBuf = new SampleBuffer(this.bufCap);
this.coldBuf = new SampleBuffer(this.bufCap);
this.streamDuration = new TimeSpan(this.maxAge.Ticks / this.ageBuckets);
this.headStreamExpTime = DateTime.UtcNow.Add(this.streamDuration);
this.hotBufExpTime = this.headStreamExpTime;
this.streams = new QuantileStream[this.ageBuckets];
for (var i = 0; i < this.ageBuckets; i++)
{
this.streams[i] = QuantileStream.NewTargeted(this.objectives);
}
this.headStream = this.streams[0];
for (var i = 0; i < this.objectives.Count; i++)
{
this.sortedObjectives[i] = this.objectives[i].Quantile;
}
Array.Sort(this.sortedObjectives);
}
// SwapBufs needs mtx AND bufMtx locked, coldBuf must be empty.
private void SwapBufs(DateTime now)
{
if (!this.coldBuf.IsEmpty)
{
throw new InvalidOperationException("coldBuf is not empty");
}
var temp = this.hotBuf;
this.hotBuf = this.coldBuf;
this.coldBuf = temp;
// hotBuf is now empty and gets new expiration set.
while (now > this.hotBufExpTime)
{
this.hotBufExpTime = this.hotBufExpTime.Add(this.streamDuration);
}
}