1 files changed, 63 insertions, 0 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/SystemMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/SystemMetrics.scala
new file mode 100644
index 00000000..29048915
--- /dev/null
+++ b/kamon-system-metrics/src/main/scala/kamon/system/SystemMetrics.scala
@@ -0,0 +1,63 @@
+/*
+ * =========================================================================================
+ * 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.system
+
+import java.lang.management.ManagementFactory
+
+import akka.actor._
+import akka.event.Logging
+import kamon.Kamon
+import kamon.metric.Metrics
+import kamon.metrics._
+
+import scala.collection.JavaConverters._
+import scala.concurrent.duration._
+
+object SystemMetrics extends ExtensionId[SystemMetricsExtension] with ExtensionIdProvider {
+  override def lookup(): ExtensionId[_ <: Extension] = SystemMetrics
+
+  override def createExtension(system: ExtendedActorSystem): SystemMetricsExtension = new SystemMetricsExtension(system)
+}
+
+class SystemMetricsExtension(private val system: ExtendedActorSystem) extends Kamon.Extension {
+  import kamon.system.SystemMetricsExtension._
+
+  val log = Logging(system, classOf[SystemMetricsExtension])
+  log.info(s"Starting the Kamon(SystemMetrics) extension")
+
+  val systemMetricsExtension = Kamon(Metrics)(system)
+
+  //JVM Metrics
+  systemMetricsExtension.register(HeapMetrics(Heap), HeapMetrics.Factory)
+  garbageCollectors.map { gc ⇒ systemMetricsExtension.register(GCMetrics(gc.getName), GCMetrics.Factory(gc)) }
+
+  //System Metrics
+  system.actorOf(SystemMetricsCollector.props(1 second), "system-metrics-collector")
+}
+
+object SystemMetricsExtension {
+  val CPU = "cpu"
+  val ProcessCPU = "process-cpu"
+  val Network = "network"
+  val Memory = "memory"
+  val Heap = "heap"
+
+  def toKB(value: Long): Long = (value / 1024)
+  def toMB(value: Long): Long = (value / 1024 / 1024)
+  def toLong(value: Double): Long = math round (value * 100L)
+
+  val garbageCollectors = ManagementFactory.getGarbageCollectorMXBeans.asScala.filter(_.isValid)
+}