1 files changed, 85 insertions, 0 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/metrics/DiskMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/metrics/DiskMetrics.scala
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+++ b/kamon-system-metrics/src/main/scala/kamon/metrics/DiskMetrics.scala
@@ -0,0 +1,85 @@
+/*
+ * =========================================================================================
+ * 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 DiskMetrics(name: String) extends MetricGroupIdentity {
+  val category = DiskMetrics
+}
+
+object DiskMetrics extends MetricGroupCategory {
+  val name = "disk"
+
+  case object Reads extends MetricIdentity { val name = "reads" }
+  case object Writes extends MetricIdentity { val name = "writes" }
+  case object Queue extends MetricIdentity { val name = "queue" }
+  case object ServiceTime extends MetricIdentity { val name = "service-time" }
+
+  case class DiskMetricsRecorder(reads: Histogram, writes: Histogram, queue: Histogram, serviceTime: Histogram)
+      extends MetricGroupRecorder {
+
+    def collect(context: CollectionContext): MetricGroupSnapshot = {
+      DiskMetricsSnapshot(reads.collect(context), writes.collect(context), queue.collect(context), serviceTime.collect(context))
+    }
+
+    def cleanup: Unit = {}
+  }
+
+  case class DiskMetricsSnapshot(reads: Histogram.Snapshot, writes: Histogram.Snapshot, queue: Histogram.Snapshot, serviceTime: Histogram.Snapshot)
+      extends MetricGroupSnapshot {
+
+    type GroupSnapshotType = DiskMetricsSnapshot
+
+    def merge(that: GroupSnapshotType, context: CollectionContext): GroupSnapshotType = {
+      DiskMetricsSnapshot(reads.merge(that.reads, context), writes.merge(that.writes, context), queue.merge(that.queue, context), serviceTime.merge(that.serviceTime, context))
+    }
+
+    lazy val metrics: Map[MetricIdentity, MetricSnapshot] = Map(
+      Reads -> reads,
+      Writes -> writes,
+      Queue -> queue,
+      ServiceTime -> serviceTime)
+  }
+
+  val Factory = DiskMetricGroupFactory
+}
+
+case object DiskMetricGroupFactory extends MetricGroupFactory {
+
+  import DiskMetrics._
+
+  type GroupRecorder = DiskMetricsRecorder
+
+  def create(config: Config, system: ActorSystem): GroupRecorder = {
+    val settings = config.getConfig("precision.system.disk")
+
+    val readsDiskConfig = settings.getConfig("reads")
+    val writesDiskConfig = settings.getConfig("writes")
+    val queueDiskConfig = settings.getConfig("queue")
+    val serviceTimeDiskConfig = settings.getConfig("service-time")
+
+    new DiskMetricsRecorder(
+      Histogram.fromConfig(readsDiskConfig),
+      Histogram.fromConfig(writesDiskConfig),
+      Histogram.fromConfig(queueDiskConfig),
+      Histogram.fromConfig(serviceTimeDiskConfig))
+  }
+}
+