From d76d5a6f445278e686fc7484edbdb61483971b23 Mon Sep 17 00:00:00 2001
From: Diego <diegolparra@gmail.com>
Date: Wed, 2 Apr 2014 18:16:09 -0300
Subject: refactor

---
 .../scala/kamon/statsd/StatsdMetricsSender.scala   | 70 ++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 kamon-statsd/src/main/scala/kamon/statsd/StatsdMetricsSender.scala

(limited to 'kamon-statsd/src/main/scala/kamon/statsd/StatsdMetricsSender.scala')

diff --git a/kamon-statsd/src/main/scala/kamon/statsd/StatsdMetricsSender.scala b/kamon-statsd/src/main/scala/kamon/statsd/StatsdMetricsSender.scala
new file mode 100644
index 00000000..1ccf5397
--- /dev/null
+++ b/kamon-statsd/src/main/scala/kamon/statsd/StatsdMetricsSender.scala
@@ -0,0 +1,70 @@
+/*
+ * =========================================================================================
+ * 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.statsd
+
+import akka.actor.{ActorLogging, Props, ActorRef, Actor}
+import akka.io.{Udp, IO}
+import java.net.InetSocketAddress
+import akka.util.ByteString
+
+class StatsdMetricsSender(statPrefix:String, remote: InetSocketAddress) extends Actor with ActorLogging {
+  import StatsdMetricsSender._
+  import context.system
+
+  IO(Udp) ! Udp.SimpleSender
+
+  def receive = {
+    case Udp.SimpleSenderReady =>
+      context.become(ready(sender))
+  }
+
+  def ready(send: ActorRef): Receive = {
+    case metric: StatsdMetric =>
+      send ! Udp.Send(toByteString(statPrefix, metric), remote)
+
+    case _ => log.error("Unknown Metric")
+  }
+}
+
+object StatsdMetricsSender {
+
+  sealed trait StatsdMetric
+  case class Counter(key: String, value: Long = 1, suffix:String = "c", samplingRate: Double = 1.0) extends StatsdMetric
+  case class Timing(key: String, millis: Long, suffix:String = "ms", samplingRate: Double = 1.0) extends StatsdMetric
+  case class Gauge(key: String, value: Long, suffix:String = "g", samplingRate: Double = 1.0) extends StatsdMetric
+
+  def props(statPrefix:String, remote: InetSocketAddress): Props = Props(new StatsdMetricsSender(statPrefix, remote))
+
+  def toByteString(statPrefix:String, metric:StatsdMetric) : ByteString = metric match  {
+    case Counter(key, value, suffix, samplingRate) => statFor(statPrefix, key, value, suffix, samplingRate)
+    case Timing(key, value, suffix, samplingRate) => statFor(statPrefix, key, value, suffix, samplingRate)
+    case Gauge(key, value, suffix, samplingRate) => statFor(statPrefix, key, value, suffix, samplingRate)
+  }
+
+  /*
+   * Creates the stat string to send to statsd.
+   * For counters, it provides something like {@code key:value|c}.
+   * For timing, it provides something like {@code key:millis|ms}.
+   * If sampling rate is less than 1, it provides something like {@code key:value|type|@rate}
+   */
+  private[this] def statFor(statPrefix:String, key: String, value: Long, suffix: String, samplingRate: Double): ByteString = {
+    samplingRate match {
+      case x if x >= 1.0 => ByteString(s"${statPrefix}.${key}:${value}|$suffix")
+      case _ => ByteString(s"${statPrefix}.${key}:${value}|${suffix}|@$samplingRate")
+    }
+  }
+}
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