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package kamon.newrelic
import kamon.metric.instrument.{ Counter, Histogram }
import kamon.metric.{ MetricSnapshot, Scale }
case class MetricID(name: String, scope: Option[String])
case class MetricData(callCount: Long, total: Double, totalExclusive: Double, min: Double, max: Double, sumOfSquares: Double) {
def merge(that: MetricData): MetricData =
MetricData(
callCount + that.callCount,
total + that.total,
totalExclusive + that.totalExclusive,
math.min(min, that.min),
math.max(max, that.max),
sumOfSquares + that.sumOfSquares)
}
object Metric {
def fromKamonMetricSnapshot(snapshot: MetricSnapshot, name: String, scope: Option[String], targetScale: Scale): Metric = {
snapshot match {
case hs: Histogram.Snapshot ⇒
var total: Double = 0D
var sumOfSquares: Double = 0D
val scaledMin = Scale.convert(hs.scale, targetScale, hs.min)
val scaledMax = Scale.convert(hs.scale, targetScale, hs.max)
hs.recordsIterator.foreach { record ⇒
val scaledValue = Scale.convert(hs.scale, targetScale, record.level)
total += scaledValue * record.count
sumOfSquares += (scaledValue * scaledValue) * record.count
}
(MetricID(name, scope), MetricData(hs.numberOfMeasurements, total, total, scaledMin, scaledMax, sumOfSquares))
case cs: Counter.Snapshot ⇒
(MetricID(name, scope), MetricData(cs.count, cs.count, cs.count, 0, cs.count, cs.count * cs.count))
}
}
}
case class TimeSliceMetrics(from: Long, to: Long, metrics: Map[MetricID, MetricData]) {
import kamon.metric.combineMaps
def merge(that: TimeSliceMetrics): TimeSliceMetrics = {
val mergedFrom = math.min(from, that.from)
val mergedTo = math.max(to, that.to)
val mergedMetrics = combineMaps(metrics, that.metrics)((l, r) ⇒ l.merge(r))
TimeSliceMetrics(mergedFrom, mergedTo, mergedMetrics)
}
}
case class MetricBatch(runID: Long, timeSliceMetrics: TimeSliceMetrics)
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