1 files changed, 73 insertions, 0 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/metrics/ProcessCPUMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/metrics/ProcessCPUMetrics.scala
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+++ b/kamon-system-metrics/src/main/scala/kamon/metrics/ProcessCPUMetrics.scala
@@ -0,0 +1,73 @@
+/*
+ * =========================================================================================
+ * 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._
+import kamon.metric.instrument.Histogram
+
+case class ProcessCPUMetrics(name: String) extends MetricGroupIdentity {
+  val category = ProcessCPUMetrics
+}
+
+object ProcessCPUMetrics extends MetricGroupCategory {
+  val name = "proc-cpu"
+
+  case object User extends MetricIdentity { val name = "user" }
+  case object System extends MetricIdentity { val name = "system" }
+
+  case class ProcessCPUMetricsRecorder(user: Histogram, system: Histogram)
+      extends MetricGroupRecorder {
+
+    def collect(context: CollectionContext): MetricGroupSnapshot = {
+      ProcessCPUMetricsSnapshot(user.collect(context), system.collect(context))
+    }
+
+    def cleanup: Unit = {}
+  }
+
+  case class ProcessCPUMetricsSnapshot(user: Histogram.Snapshot, system: Histogram.Snapshot)
+      extends MetricGroupSnapshot {
+
+    type GroupSnapshotType = ProcessCPUMetricsSnapshot
+
+    def merge(that: ProcessCPUMetricsSnapshot, context: CollectionContext): GroupSnapshotType = {
+      ProcessCPUMetricsSnapshot(user.merge(that.user, context), system.merge(that.system, context))
+    }
+
+    lazy val metrics: Map[MetricIdentity, MetricSnapshot] = Map(
+      User -> user,
+      System -> system)
+  }
+
+  val Factory = new MetricGroupFactory {
+
+    type GroupRecorder = ProcessCPUMetricsRecorder
+
+    def create(config: Config, system: ActorSystem): GroupRecorder = {
+      val settings = config.getConfig("precision.system.process-cpu")
+
+      val userConfig = settings.getConfig("user")
+      val systemConfig = settings.getConfig("system")
+
+      new ProcessCPUMetricsRecorder(
+        Histogram.fromConfig(userConfig),
+        Histogram.fromConfig(systemConfig))
+    }
+  }
+}
+