1 files changed, 84 insertions, 0 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/metrics/CPUMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/metrics/CPUMetrics.scala
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+++ b/kamon-system-metrics/src/main/scala/kamon/metrics/CPUMetrics.scala
@@ -0,0 +1,84 @@
+/*
+ * =========================================================================================
+ * 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 akka.actor.ActorSystem
+import com.typesafe.config.Config
+import kamon.metric.instrument.{ Gauge, Histogram }
+import kamon.metric._
+import kamon.system.SigarExtensionProvider
+import org.hyperic.sigar.SigarProxy
+
+case class CPUMetrics(name: String) extends MetricGroupIdentity {
+  val category = CPUMetrics
+}
+
+object CPUMetrics extends MetricGroupCategory {
+  val name = "cpu"
+
+  case object User extends MetricIdentity { val name = "user" }
+  case object System extends MetricIdentity { val name = "system" }
+  case object Wait extends MetricIdentity { val name = "wait" }
+  case object Idle extends MetricIdentity { val name = "idle" }
+
+  case class CPUMetricRecorder(user: Gauge, system: Gauge, cpuWait: Gauge, idle: Gauge)
+      extends MetricGroupRecorder {
+
+    def collect(context: CollectionContext): MetricGroupSnapshot = {
+      CPUMetricSnapshot(user.collect(context), system.collect(context), cpuWait.collect(context), idle.collect(context))
+    }
+
+    def cleanup: Unit = {}
+  }
+
+  case class CPUMetricSnapshot(user: Histogram.Snapshot, system: Histogram.Snapshot, cpuWait: Histogram.Snapshot, idle: Histogram.Snapshot)
+      extends MetricGroupSnapshot {
+
+    type GroupSnapshotType = CPUMetricSnapshot
+
+    def merge(that: CPUMetricSnapshot, context: CollectionContext): GroupSnapshotType = {
+      CPUMetricSnapshot(user.merge(that.user, context), system.merge(that.system, context), cpuWait.merge(that.cpuWait, context), idle.merge(that.idle, context))
+    }
+
+    lazy val metrics: Map[MetricIdentity, MetricSnapshot] = Map(
+      User -> user,
+      System -> system,
+      Wait -> cpuWait,
+      Idle -> idle)
+  }
+
+  val Factory = new MetricGroupFactory with SigarExtensionProvider {
+    def cpu = sigar.getCpu
+
+    type GroupRecorder = CPUMetricRecorder
+
+    def create(config: Config, system: ActorSystem): GroupRecorder = {
+      val settings = config.getConfig("precision.system.cpu")
+
+      val userConfig = settings.getConfig("user")
+      val systemConfig = settings.getConfig("system")
+      val cpuWaitConfig = settings.getConfig("wait")
+      val idleConfig = settings.getConfig("idle")
+
+      new CPUMetricRecorder(
+        Gauge.fromConfig(userConfig, system)(() ⇒ cpu.getUser),
+        Gauge.fromConfig(systemConfig, system)(() ⇒ cpu.getSys),
+        Gauge.fromConfig(cpuWaitConfig, system)(() ⇒ cpu.getWait),
+        Gauge.fromConfig(idleConfig, system)(() ⇒ cpu.getIdle))
+    }
+  }
+}
+