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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 ClassLoadingMetrics(name: String) extends MetricGroupIdentity {
val category = ClassLoadingMetrics
}
object ClassLoadingMetrics extends MetricGroupCategory {
val name = "classes"
case object Loaded extends MetricIdentity { val name = "total-loaded" }
case object Unloaded extends MetricIdentity { val name = "total-unloaded" }
case object Current extends MetricIdentity { val name = "current-loaded" }
case class ClassLoadingMetricRecorder(loaded: Gauge, unloaded: Gauge, current: Gauge)
extends MetricGroupRecorder {
def collect(context: CollectionContext): MetricGroupSnapshot = {
ClassLoadingMetricSnapshot(loaded.collect(context), unloaded.collect(context), current.collect(context))
}
def cleanup: Unit = {}
}
case class ClassLoadingMetricSnapshot(loaded: Histogram.Snapshot, unloaded: Histogram.Snapshot, current: Histogram.Snapshot)
extends MetricGroupSnapshot {
type GroupSnapshotType = ClassLoadingMetricSnapshot
def merge(that: GroupSnapshotType, context: CollectionContext): GroupSnapshotType = {
ClassLoadingMetricSnapshot(loaded.merge(that.loaded, context), unloaded.merge(that.unloaded, context), current.merge(that.current, context))
}
lazy val metrics: Map[MetricIdentity, MetricSnapshot] = Map(
Loaded -> loaded,
Unloaded -> unloaded,
Current -> current)
}
val Factory = ClassLoadingMetricGroupFactory
}
case object ClassLoadingMetricGroupFactory extends MetricGroupFactory {
import ClassLoadingMetrics._
val classes = ManagementFactory.getClassLoadingMXBean
type GroupRecorder = ClassLoadingMetricRecorder
def create(config: Config, system: ActorSystem): GroupRecorder = {
val settings = config.getConfig("precision.jvm.classes")
val totalLoadedConfig = settings.getConfig("total-loaded")
val totalUnloadedConfig = settings.getConfig("total-unloaded")
val currentLoadedConfig = settings.getConfig("current-loaded")
new ClassLoadingMetricRecorder(
Gauge.fromConfig(totalLoadedConfig, system)(() ⇒ classes.getTotalLoadedClassCount),
Gauge.fromConfig(totalUnloadedConfig, system)(() ⇒ classes.getUnloadedClassCount),
Gauge.fromConfig(currentLoadedConfig, system)(() ⇒ classes.getLoadedClassCount.toLong))
}
}
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