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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.sigar
import akka.actor.{ Props, Actor }
import akka.event.{ Logging, NoLogging, LoggingAdapter }
import kamon.Kamon
import kamon.metric.instrument.InstrumentFactory
import kamon.metric._
import kamon.system.sigar.SigarMetricsUpdater.UpdateSigarMetrics
import org.hyperic.sigar.Sigar
import scala.concurrent.duration.FiniteDuration
class SigarMetricsUpdater(refreshInterval: FiniteDuration) extends Actor {
val sigar = new Sigar
val metricsExtension = Kamon.metrics
val logger = Logging(context.system, this)
val sigarMetrics = List(
CpuMetrics.register(sigar, metricsExtension, logger),
FileSystemMetrics.register(sigar, metricsExtension, logger),
LoadAverageMetrics.register(sigar, metricsExtension, logger),
MemoryMetrics.register(sigar, metricsExtension, logger),
NetworkMetrics.register(sigar, metricsExtension, logger),
ProcessCpuMetrics.register(sigar, metricsExtension, logger),
ULimitMetrics.register(sigar, metricsExtension, logger)).flatten
val refreshSchedule = context.system.scheduler.schedule(refreshInterval, refreshInterval, self, UpdateSigarMetrics)(context.dispatcher)
def receive = {
case UpdateSigarMetrics ⇒ updateMetrics()
}
def updateMetrics(): Unit = {
sigarMetrics.foreach(_.update())
}
override def postStop(): Unit = {
refreshSchedule.cancel()
super.postStop()
}
}
object SigarMetricsUpdater {
def props(refreshInterval: FiniteDuration): Props =
Props(new SigarMetricsUpdater(refreshInterval))
case object UpdateSigarMetrics
}
trait SigarMetric extends EntityRecorder {
def update(): Unit
}
object SigarSafeRunner {
private val errorLogged = scala.collection.mutable.Set[String]()
def runSafe[T](thunk: ⇒ T, defaultValue: ⇒ T, error: String, logger: LoggingAdapter): T = {
try thunk catch {
case e: Exception ⇒
if (!errorLogged.contains(error)) {
errorLogged += error
logger.warning("Couldn't get the metric [{}]. Due to [{}]", error, e.getMessage)
}
defaultValue
}
}
}
abstract class SigarMetricRecorderCompanion(metricName: String) {
def register(sigar: Sigar, metricsExtension: MetricsModule, logger: LoggingAdapter = NoLogging): Option[SigarMetric] =
if (metricsExtension.shouldTrack(metricName, "system-metric"))
Some(metricsExtension.entity(EntityRecorderFactory("system-metric", apply(sigar, _)), metricName))
else
None
def apply(sigar: Sigar, instrumentFactory: InstrumentFactory, logger: LoggingAdapter = NoLogging): SigarMetric
}
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