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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.ManagementFactory
import akka.actor.ActorSystem
import com.typesafe.config.Config
import kamon.metric._
import kamon.metric.instrument.{ Gauge, Histogram }
case class HeapMetrics(name: String) extends MetricGroupIdentity {
val category = HeapMetrics
}
object HeapMetrics extends MetricGroupCategory {
val name = "heap"
case object Used extends MetricIdentity { val name = "used-heap" }
case object Max extends MetricIdentity { val name = "max-heap" }
case object Committed extends MetricIdentity { val name = "committed-heap" }
case class HeapMetricRecorder(used: Gauge, max: Gauge, committed: Gauge)
extends MetricGroupRecorder {
def collect(context: CollectionContext): MetricGroupSnapshot = {
HeapMetricSnapshot(used.collect(context), max.collect(context), committed.collect(context))
}
def cleanup: Unit = {}
}
case class HeapMetricSnapshot(used: Histogram.Snapshot, max: Histogram.Snapshot, committed: Histogram.Snapshot)
extends MetricGroupSnapshot {
type GroupSnapshotType = HeapMetricSnapshot
def merge(that: GroupSnapshotType, context: CollectionContext): GroupSnapshotType = {
HeapMetricSnapshot(used.merge(that.used, context), max.merge(that.max, context), committed.merge(that.committed, context))
}
lazy val metrics: Map[MetricIdentity, MetricSnapshot] = Map(
Used -> used,
Max -> max,
Committed -> committed)
}
val Factory = new MetricGroupFactory {
import kamon.system.SystemMetricsExtension._
val memory = ManagementFactory.getMemoryMXBean
def heap = memory.getHeapMemoryUsage
type GroupRecorder = HeapMetricRecorder
def create(config: Config, system: ActorSystem): GroupRecorder = {
val settings = config.getConfig("precision.jvm.heap")
val usedHeapConfig = settings.getConfig("used")
val maxHeapConfig = settings.getConfig("max")
val committedHeapConfig = settings.getConfig("committed")
new HeapMetricRecorder(
Gauge.fromConfig(usedHeapConfig, system,Scale.Mega)(() ⇒ toMB(heap.getUsed)),
Gauge.fromConfig(maxHeapConfig, system, Scale.Mega)(() ⇒ toMB(heap.getMax)),
Gauge.fromConfig(committedHeapConfig, system, Scale.Mega)(() ⇒ toMB(heap.getCommitted)))
}
}
}
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