From 79630c2bab9d3b01f1728f4aa780c7e68665cc50 Mon Sep 17 00:00:00 2001
From: Diego <diegolparra@gmail.com>
Date: Thu, 20 Aug 2015 00:03:16 -0300
Subject: ! core: generalize ThreadPoolExecutors metrics

---
 .../util/executors/ExecutorServiceMetrics.scala    | 91 ++++++++++++++++++++++
 .../scala/kamon/util/http/HttpServerMetrics.scala  | 41 ++++++++++
 2 files changed, 132 insertions(+)
 create mode 100644 kamon-core/src/main/scala/kamon/util/executors/ExecutorServiceMetrics.scala
 create mode 100644 kamon-core/src/main/scala/kamon/util/http/HttpServerMetrics.scala

(limited to 'kamon-core/src/main/scala/kamon/util')

diff --git a/kamon-core/src/main/scala/kamon/util/executors/ExecutorServiceMetrics.scala b/kamon-core/src/main/scala/kamon/util/executors/ExecutorServiceMetrics.scala
new file mode 100644
index 00000000..e1d84df3
--- /dev/null
+++ b/kamon-core/src/main/scala/kamon/util/executors/ExecutorServiceMetrics.scala
@@ -0,0 +1,91 @@
+/*
+ * =========================================================================================
+ * Copyright © 2013-2015 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.util.executors
+
+import kamon.Kamon
+import kamon.metric.{ EntityRecorderFactory, Entity, GenericEntityRecorder }
+import kamon.metric.instrument.{ DifferentialValueCollector, InstrumentFactory }
+import java.util.concurrent.ThreadPoolExecutor
+import scala.concurrent.forkjoin.ForkJoinPool
+import java.util.concurrent.{ ForkJoinPool ⇒ JavaForkJoinPool }
+
+class ForkJoinPoolMetrics(fjp: ForkJoinPool, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
+  val paralellism = minMaxCounter("parallelism")
+  paralellism.increment(fjp.getParallelism) // Steady value.
+
+  val poolSize = gauge("pool-size", fjp.getPoolSize.toLong)
+  val activeThreads = gauge("active-threads", fjp.getActiveThreadCount.toLong)
+  val runningThreads = gauge("running-threads", fjp.getRunningThreadCount.toLong)
+  val queuedTaskCount = gauge("queued-task-count", fjp.getQueuedTaskCount)
+}
+
+object ForkJoinPoolMetrics {
+  def factory(fjp: ForkJoinPool) = new EntityRecorderFactory[ForkJoinPoolMetrics] {
+    def category: String = ExecutorServiceMetrics.Category
+    def createRecorder(instrumentFactory: InstrumentFactory) = new ForkJoinPoolMetrics(fjp, instrumentFactory)
+  }
+}
+
+class JavaForkJoinPoolMetrics(fjp: JavaForkJoinPool, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
+  val paralellism = minMaxCounter("parallelism")
+  paralellism.increment(fjp.getParallelism) // Steady value.
+
+  val poolSize = gauge("pool-size", fjp.getPoolSize.toLong)
+  val activeThreads = gauge("active-threads", fjp.getActiveThreadCount.toLong)
+  val runningThreads = gauge("running-threads", fjp.getRunningThreadCount.toLong)
+  val queuedTaskCount = gauge("queued-task-count", fjp.getQueuedTaskCount)
+}
+
+object JavaForkJoinPoolMetrics {
+  def factory(fjp: JavaForkJoinPool) = new EntityRecorderFactory[JavaForkJoinPoolMetrics] {
+    def category: String = ExecutorServiceMetrics.Category
+    def createRecorder(instrumentFactory: InstrumentFactory) = new JavaForkJoinPoolMetrics(fjp, instrumentFactory)
+  }
+}
+
+class ThreadPoolExecutorMetrics(tpe: ThreadPoolExecutor, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
+  val corePoolSize = gauge("core-pool-size", tpe.getCorePoolSize.toLong)
+  val maxPoolSize = gauge("max-pool-size", tpe.getMaximumPoolSize.toLong)
+  val poolSize = gauge("pool-size", tpe.getPoolSize.toLong)
+  val activeThreads = gauge("active-threads", tpe.getActiveCount.toLong)
+  val processedTasks = gauge("processed-tasks", DifferentialValueCollector(() ⇒ {
+    tpe.getTaskCount
+  }))
+}
+
+object ThreadPoolExecutorMetrics {
+  def factory(tpe: ThreadPoolExecutor) = new EntityRecorderFactory[ThreadPoolExecutorMetrics] {
+    def category: String = ExecutorServiceMetrics.Category
+    def createRecorder(instrumentFactory: InstrumentFactory) = new ThreadPoolExecutorMetrics(tpe, instrumentFactory)
+  }
+}
+
+object ExecutorServiceMetrics {
+  val Category = "thread-pool-executors"
+
+  def register(name: String, tpe: ThreadPoolExecutor): Unit = {
+    Kamon.metrics.entity(ThreadPoolExecutorMetrics.factory(tpe), Entity(name, Category))
+  }
+
+  def register(name: String, fjp: ForkJoinPool): Unit = {
+    Kamon.metrics.entity(ForkJoinPoolMetrics.factory(fjp), Entity(name, Category))
+  }
+
+  def register(name: String, jfjp: JavaForkJoinPool): Unit = {
+    Kamon.metrics.entity(JavaForkJoinPoolMetrics.factory(jfjp), Entity(name, Category))
+  }
+}
diff --git a/kamon-core/src/main/scala/kamon/util/http/HttpServerMetrics.scala b/kamon-core/src/main/scala/kamon/util/http/HttpServerMetrics.scala
new file mode 100644
index 00000000..81e8fb8b
--- /dev/null
+++ b/kamon-core/src/main/scala/kamon/util/http/HttpServerMetrics.scala
@@ -0,0 +1,41 @@
+/*
+ * =========================================================================================
+ * Copyright © 2013-2015 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.util.http
+
+import kamon.metric.{ EntityRecorderFactory, GenericEntityRecorder }
+import kamon.metric.instrument.InstrumentFactory
+
+/**
+ *  Counts HTTP response status codes into per status code and per trace name + status counters. If recording a HTTP
+ *  response with status 500 for the trace "GetUser", the counter with name "500" as well as the counter with name
+ *  "GetUser_500" will be incremented.
+ */
+class HttpServerMetrics(instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
+
+  def recordResponse(statusCode: String): Unit =
+    counter(statusCode).increment()
+
+  def recordResponse(traceName: String, statusCode: String): Unit = {
+    recordResponse(statusCode)
+    counter(traceName + "_" + statusCode).increment()
+  }
+}
+
+object HttpServerMetrics extends EntityRecorderFactory[HttpServerMetrics] {
+  def category: String = "http-server"
+  def createRecorder(instrumentFactory: InstrumentFactory): HttpServerMetrics = new HttpServerMetrics(instrumentFactory)
+}
-- 
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