Created
April 3, 2016 17:34
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Kamon Metrics Collector
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| import java.nio.LongBuffer | |
| import akka.actor.{ActorLogging, Actor} | |
| import kamon.metric._ | |
| import kamon.metric.instrument.{Histogram, CollectionContext} | |
| class MetricsCollector extends Actor with ActorLogging { | |
| import MetricsCollector._ | |
| def ms(nanos: Long) = nanos / 1000 / 1000 | |
| var histograms: Map[Entity, Histogram.Snapshot] = Map.empty | |
| def extractMetrics(): Iterable[EntityMetrics] = histograms.map { case (entity, histogram) => | |
| EntityMetrics(entity.name, ms(histogram.min), ms(histogram.max), ms(histogram.sum / histogram.numberOfMeasurements)) | |
| } | |
| def receive = { | |
| case tickSnapshot: SubscriptionsDispatcher.TickMetricSnapshot => | |
| tickSnapshot.metrics.map { case (entity, snapshot) => | |
| snapshot.histogram("elapsed-time").map { newHistogram => | |
| val histogram = histograms.get(entity).getOrElse(Histogram.Snapshot.empty) | |
| val mergedHistograms = histogram.merge(newHistogram, collectionContext) | |
| histograms += (entity -> mergedHistograms) | |
| } | |
| } | |
| case GetMetrics => sender ! extractMetrics() | |
| } | |
| val collectionContext = new CollectionContext { | |
| val buffer: LongBuffer = LongBuffer.allocate(10000) | |
| } | |
| } | |
| object MetricsCollector { | |
| case class EntityMetrics(name: String, min: Long, max: Long, avg: Long) | |
| case object GetMetrics | |
| } |
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