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/*
* =========================================================================================
* Copyright © 2013-2014 the kamon project <http://kamon.io/>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
* =========================================================================================
*/
package kamon.metrics
import java.lang.management.GarbageCollectorMXBean
import akka.actor.ActorSystem
import com.typesafe.config.Config
import kamon.metric._
import kamon.metric.instrument.{ Gauge, Histogram }
case class GCMetrics(name: String) extends MetricGroupIdentity {
val category = GCMetrics
}
object GCMetrics extends MetricGroupCategory {
val name = "gc"
case object CollectionCount extends MetricIdentity { val name = "collection-count" }
case object CollectionTime extends MetricIdentity { val name = "collection-time" }
case class GCMetricRecorder(count: Gauge, time: Gauge)
extends MetricGroupRecorder {
def collect(context: CollectionContext): MetricGroupSnapshot = {
GCMetricSnapshot(count.collect(context), time.collect(context))
}
def cleanup: Unit = {}
}
case class GCMetricSnapshot(count: Histogram.Snapshot, time: Histogram.Snapshot)
extends MetricGroupSnapshot {
type GroupSnapshotType = GCMetricSnapshot
def merge(that: GroupSnapshotType, context: CollectionContext): GroupSnapshotType = {
GCMetricSnapshot(count.merge(that.count, context), time.merge(that.time, context))
}
lazy val metrics: Map[MetricIdentity, MetricSnapshot] = Map(
CollectionCount -> count,
CollectionTime -> time)
}
def Factory(gc: GarbageCollectorMXBean) = new MetricGroupFactory {
type GroupRecorder = GCMetricRecorder
def create(config: Config, system: ActorSystem): GroupRecorder = {
val settings = config.getConfig("precision.jvm.gc")
val countConfig = settings.getConfig("count")
val timeConfig = settings.getConfig("time")
new GCMetricRecorder(
Gauge.fromConfig(countConfig, system)(() ⇒ gc.getCollectionCount),
Gauge.fromConfig(timeConfig, system, Scale.Milli)(() ⇒ gc.getCollectionTime))
}
}
}
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