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/*
* =========================================================================================
* Copyright © 2013-2015 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.system.jmx
import java.lang.management.{ GarbageCollectorMXBean, ManagementFactory }
import kamon.metric.{ Entity, MetricsExtension, GenericEntityRecorder }
import kamon.metric.instrument.{ DifferentialValueCollector, Time, InstrumentFactory }
import scala.collection.JavaConverters._
/**
* Garbage Collection metrics, as reported by JMX:
* - @see [[http://docs.oracle.com/javase/7/docs/api/java/lang/management/GarbageCollectorMXBean.html "GarbageCollectorMXBean"]]
*/
class GarbageCollectionMetrics(gc: GarbageCollectorMXBean, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
gauge("garbage-collection-count", DifferentialValueCollector(() ⇒ {
gc.getCollectionCount
}))
gauge("garbage-collection-time", Time.Milliseconds, DifferentialValueCollector(() ⇒ {
gc.getCollectionTime
}))
}
object GarbageCollectionMetrics {
def sanitizeCollectorName(name: String): String =
name.replaceAll("""[^\w]""", "-").toLowerCase
def register(metricsExtension: MetricsExtension): Unit = {
val instrumentFactory = metricsExtension.instrumentFactory("system-metric")
ManagementFactory.getGarbageCollectorMXBeans.asScala.filter(_.isValid) map { gc ⇒
val gcName = sanitizeCollectorName(gc.getName)
metricsExtension.register(Entity(s"$gcName-garbage-collector", "system-metric"), new GarbageCollectionMetrics(gc, instrumentFactory))
}
}
}
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