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|
/*
* =========================================================================================
* 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.logreporter
import akka.actor._
import akka.event.Logging
import kamon.Kamon
import kamon.metric.SubscriptionsDispatcher.TickMetricSnapshot
import kamon.metric._
import kamon.metric.instrument.{ Counter, Histogram }
object LogReporter extends ExtensionId[LogReporterExtension] with ExtensionIdProvider {
override def lookup(): ExtensionId[_ <: Extension] = LogReporter
override def createExtension(system: ExtendedActorSystem): LogReporterExtension = new LogReporterExtension(system)
}
class LogReporterExtension(system: ExtendedActorSystem) extends Kamon.Extension {
val log = Logging(system, classOf[LogReporterExtension])
log.info("Starting the Kamon(LogReporter) extension")
val subscriber = system.actorOf(Props[LogReporterSubscriber], "kamon-log-reporter")
Kamon.metrics.subscribe("trace", "**", subscriber, permanently = true)
Kamon.metrics.subscribe("akka-actor", "**", subscriber, permanently = true)
Kamon.metrics.subscribe("akka-dispatcher", "**", subscriber, permanently = true)
Kamon.metrics.subscribe("counter", "**", subscriber, permanently = true)
Kamon.metrics.subscribe("histogram", "**", subscriber, permanently = true)
Kamon.metrics.subscribe("min-max-counter", "**", subscriber, permanently = true)
Kamon.metrics.subscribe("gauge", "**", subscriber, permanently = true)
Kamon.metrics.subscribe("system-metric", "**", subscriber, permanently = true)
}
class LogReporterSubscriber extends Actor with ActorLogging {
import kamon.logreporter.LogReporterSubscriber.RichHistogramSnapshot
def receive = {
case tick: TickMetricSnapshot ⇒ printMetricSnapshot(tick)
}
def printMetricSnapshot(tick: TickMetricSnapshot): Unit = {
// Group all the user metrics together.
val histograms = Map.newBuilder[String, Option[Histogram.Snapshot]]
val counters = Map.newBuilder[String, Option[Counter.Snapshot]]
val minMaxCounters = Map.newBuilder[String, Option[Histogram.Snapshot]]
val gauges = Map.newBuilder[String, Option[Histogram.Snapshot]]
tick.metrics foreach {
case (entity, snapshot) if entity.category == "akka-actor" ⇒ logActorMetrics(entity.name, snapshot)
case (entity, snapshot) if entity.category == "akka-dispatcher" ⇒ logDispatcherMetrics(entity, snapshot)
case (entity, snapshot) if entity.category == "trace" ⇒ logTraceMetrics(entity.name, snapshot)
case (entity, snapshot) if entity.category == "histogram" ⇒ histograms += (entity.name -> snapshot.histogram("histogram"))
case (entity, snapshot) if entity.category == "counter" ⇒ counters += (entity.name -> snapshot.counter("counter"))
case (entity, snapshot) if entity.category == "min-max-counter" ⇒ minMaxCounters += (entity.name -> snapshot.minMaxCounter("min-max-counter"))
case (entity, snapshot) if entity.category == "gauge" ⇒ gauges += (entity.name -> snapshot.gauge("gauge"))
case (entity, snapshot) if entity.category == "system-metric" ⇒ logSystemMetrics(entity.name, snapshot)
case ignoreEverythingElse ⇒
}
logMetrics(histograms.result(), counters.result(), minMaxCounters.result(), gauges.result())
}
def logActorMetrics(name: String, actorSnapshot: EntitySnapshot): Unit = {
for {
processingTime ← actorSnapshot.histogram("processing-time")
timeInMailbox ← actorSnapshot.histogram("time-in-mailbox")
mailboxSize ← actorSnapshot.minMaxCounter("mailbox-size")
errors ← actorSnapshot.counter("errors")
} {
log.info(
"""
|+--------------------------------------------------------------------------------------------------+
|| |
|| Actor: %-83s |
|| |
|| Processing Time (nanoseconds) Time in Mailbox (nanoseconds) Mailbox Size |
|| Msg Count: %-12s Msg Count: %-12s Min: %-8s |
|| Min: %-12s Min: %-12s Avg.: %-8s |
|| 50th Perc: %-12s 50th Perc: %-12s Max: %-8s |
|| 90th Perc: %-12s 90th Perc: %-12s |
|| 95th Perc: %-12s 95th Perc: %-12s |
|| 99th Perc: %-12s 99th Perc: %-12s Error Count: %-6s |
|| 99.9th Perc: %-12s 99.9th Perc: %-12s |
|| Max: %-12s Max: %-12s |
|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin.format(
name,
processingTime.numberOfMeasurements, timeInMailbox.numberOfMeasurements, mailboxSize.min,
processingTime.min, timeInMailbox.min, mailboxSize.average,
processingTime.percentile(50.0D), timeInMailbox.percentile(50.0D), mailboxSize.max,
processingTime.percentile(90.0D), timeInMailbox.percentile(90.0D),
processingTime.percentile(95.0D), timeInMailbox.percentile(95.0D),
processingTime.percentile(99.0D), timeInMailbox.percentile(99.0D), errors.count,
processingTime.percentile(99.9D), timeInMailbox.percentile(99.9D),
processingTime.max, timeInMailbox.max))
}
}
def logDispatcherMetrics(entity: Entity, snapshot: EntitySnapshot): Unit = entity.tags.get("dispatcher-type") match {
case Some("fork-join-pool") ⇒ logForkJoinPool(entity.name, snapshot)
case Some("thread-pool-executor") ⇒ logThreadPoolExecutor(entity.name, snapshot)
case ignoreOthers ⇒
}
def logForkJoinPool(name: String, forkJoinMetrics: EntitySnapshot): Unit = {
for {
paralellism ← forkJoinMetrics.minMaxCounter("parallelism")
poolSize ← forkJoinMetrics.gauge("pool-size")
activeThreads ← forkJoinMetrics.gauge("active-threads")
runningThreads ← forkJoinMetrics.gauge("running-threads")
queuedTaskCount ← forkJoinMetrics.gauge("queued-task-count")
} {
log.info(
"""
|+--------------------------------------------------------------------------------------------------+
|| Fork-Join-Pool |
|| |
|| Dispatcher: %-83s |
|| |
|| Paralellism: %-4s |
|| |
|| Pool Size Active Threads Running Threads Queue Task Count |
|| Min %-4s %-4s %-4s %-4s |
|| Avg %-4s %-4s %-4s %-4s |
|| Max %-4s %-4s %-4s %-4s |
|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin.format(name,
paralellism.max, poolSize.min, activeThreads.min, runningThreads.min, queuedTaskCount.min,
poolSize.average, activeThreads.average, runningThreads.average, queuedTaskCount.average,
poolSize.max, activeThreads.max, runningThreads.max, queuedTaskCount.max))
}
}
def logThreadPoolExecutor(name: String, threadPoolMetrics: EntitySnapshot): Unit = {
for {
corePoolSize ← threadPoolMetrics.gauge("core-pool-size")
maxPoolSize ← threadPoolMetrics.gauge("max-pool-size")
poolSize ← threadPoolMetrics.gauge("pool-size")
activeThreads ← threadPoolMetrics.gauge("active-threads")
processedTasks ← threadPoolMetrics.gauge("processed-tasks")
} {
log.info(
"""
|+--------------------------------------------------------------------------------------------------+
|| Thread-Pool-Executor |
|| |
|| Dispatcher: %-83s |
|| |
|| Core Pool Size: %-4s |
|| Max Pool Size: %-4s |
|| |
|| |
|| Pool Size Active Threads Processed Task |
|| Min %-4s %-4s %-4s |
|| Avg %-4s %-4s %-4s |
|| Max %-4s %-4s %-4s |
|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin.format(name,
corePoolSize.max,
maxPoolSize.max,
poolSize.min, activeThreads.min, processedTasks.min,
poolSize.average, activeThreads.average, processedTasks.average,
poolSize.max, activeThreads.max, processedTasks.max))
}
}
def logSystemMetrics(metric: String, snapshot: EntitySnapshot): Unit = metric match {
case "cpu" ⇒ logCpuMetrics(snapshot)
case "network" ⇒ logNetworkMetrics(snapshot)
case "process-cpu" ⇒ logProcessCpuMetrics(snapshot)
case "context-switches" ⇒ logContextSwitchesMetrics(snapshot)
case ignoreOthers ⇒
}
def logCpuMetrics(cpuMetrics: EntitySnapshot): Unit = {
for {
user ← cpuMetrics.histogram("cpu-user")
system ← cpuMetrics.histogram("cpu-system")
cpuWait ← cpuMetrics.histogram("cpu-wait")
idle ← cpuMetrics.histogram("cpu-idle")
} {
log.info(
"""
|+--------------------------------------------------------------------------------------------------+
|| |
|| CPU (ALL) |
|| |
|| User (percentage) System (percentage) Wait (percentage) Idle (percentage) |
|| Min: %-3s Min: %-3s Min: %-3s Min: %-3s |
|| Avg: %-3s Avg: %-3s Avg: %-3s Avg: %-3s |
|| Max: %-3s Max: %-3s Max: %-3s Max: %-3s |
|| |
|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin.format(
user.min, system.min, cpuWait.min, idle.min,
user.average, system.average, cpuWait.average, idle.average,
user.max, system.max, cpuWait.max, idle.max))
}
}
def logNetworkMetrics(networkMetrics: EntitySnapshot): Unit = {
for {
rxBytes ← networkMetrics.histogram("rx-bytes")
txBytes ← networkMetrics.histogram("tx-bytes")
rxErrors ← networkMetrics.histogram("rx-errors")
txErrors ← networkMetrics.histogram("tx-errors")
} {
log.info(
"""
|+--------------------------------------------------------------------------------------------------+
|| |
|| Network (ALL) |
|| |
|| Rx-Bytes (KB) Tx-Bytes (KB) Rx-Errors Tx-Errors |
|| Min: %-4s Min: %-4s Total: %-8s Total: %-8s |
|| Avg: %-4s Avg: %-4s |
|| Max: %-4s Max: %-4s |
|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin.
format(
rxBytes.min, txBytes.min, rxErrors.sum, txErrors.sum,
rxBytes.average, txBytes.average,
rxBytes.max, txBytes.max))
}
}
def logProcessCpuMetrics(processCpuMetrics: EntitySnapshot): Unit = {
for {
user ← processCpuMetrics.histogram("process-user-cpu")
total ← processCpuMetrics.histogram("process-cpu")
} {
log.info(
"""
|+--------------------------------------------------------------------------------------------------+
|| |
|| Process-CPU |
|| |
|| User-Percentage Total-Percentage |
|| Min: %-12s Min: %-12s |
|| Avg: %-12s Avg: %-12s |
|| Max: %-12s Max: %-12s |
|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin.format(
user.min, total.min,
user.average, total.average,
user.max, total.max))
}
}
def logContextSwitchesMetrics(contextSwitchMetrics: EntitySnapshot): Unit = {
for {
perProcessVoluntary ← contextSwitchMetrics.histogram("context-switches-process-voluntary")
perProcessNonVoluntary ← contextSwitchMetrics.histogram("context-switches-process-non-voluntary")
global ← contextSwitchMetrics.histogram("context-switches-global")
} {
log.info(
"""
|+--------------------------------------------------------------------------------------------------+
|| |
|| Context-Switches |
|| |
|| Global Per-Process-Non-Voluntary Per-Process-Voluntary |
|| Min: %-12s Min: %-12s Min: %-12s |
|| Avg: %-12s Avg: %-12s Avg: %-12s |
|| Max: %-12s Max: %-12s Max: %-12s |
|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin.
format(
global.min, perProcessNonVoluntary.min, perProcessVoluntary.min,
global.average, perProcessNonVoluntary.average, perProcessVoluntary.average,
global.max, perProcessNonVoluntary.max, perProcessVoluntary.max))
}
}
def logTraceMetrics(name: String, traceSnapshot: EntitySnapshot): Unit = {
val traceMetricsData = StringBuilder.newBuilder
for {
elapsedTime ← traceSnapshot.histogram("elapsed-time")
} {
traceMetricsData.append(
"""
|+--------------------------------------------------------------------------------------------------+
|| |
|| Trace: %-83s |
|| Count: %-8s |
|| |
|| Elapsed Time (nanoseconds): |
|"""
.stripMargin.format(
name, elapsedTime.numberOfMeasurements))
traceMetricsData.append(compactHistogramView(elapsedTime))
traceMetricsData.append(
"""
|| |
|+--------------------------------------------------------------------------------------------------+"""
.
stripMargin)
log.info(traceMetricsData.toString())
}
}
def logMetrics(histograms: Map[String, Option[Histogram.Snapshot]],
counters: Map[String, Option[Counter.Snapshot]], minMaxCounters: Map[String, Option[Histogram.Snapshot]],
gauges: Map[String, Option[Histogram.Snapshot]]): Unit = {
if (histograms.isEmpty && counters.isEmpty && minMaxCounters.isEmpty && gauges.isEmpty) {
log.info("No metrics reported")
return
}
val metricsData = StringBuilder.newBuilder
metricsData.append(
"""
|+--------------------------------------------------------------------------------------------------+
|| |
|| Counters |
|| ------------- |
|""".stripMargin)
counters.foreach { case (name, snapshot) ⇒ metricsData.append(userCounterString(name, snapshot.get)) }
metricsData.append(
"""|| |
|| |
|| Histograms |
|| -------------- |
|""".stripMargin)
histograms.foreach {
case (name, snapshot) ⇒
metricsData.append("| %-40s |\n".format(name))
metricsData.append(compactHistogramView(snapshot.get))
metricsData.append("\n| |\n")
}
metricsData.append(
"""|| |
|| MinMaxCounters |
|| ----------------- |
|""".stripMargin)
minMaxCounters.foreach {
case (name, snapshot) ⇒
metricsData.append("| %-40s |\n".format(name))
metricsData.append(histogramView(snapshot.get))
metricsData.append("\n| |\n")
}
metricsData.append(
"""|| |
|| Gauges |
|| ---------- |
|"""
.stripMargin)
gauges.foreach {
case (name, snapshot) ⇒
metricsData.append("| %-40s |\n".format(name))
metricsData.append(histogramView(snapshot.get))
metricsData.append("\n| |\n")
}
metricsData.append(
"""|| |
|+--------------------------------------------------------------------------------------------------+"""
.stripMargin)
log.info(metricsData.toString())
}
def userCounterString(counterName: String, snapshot: Counter.Snapshot): String = {
"| %30s => %-12s |\n"
.format(counterName, snapshot.count)
}
def compactHistogramView(histogram: Histogram.Snapshot): String = {
val sb = StringBuilder.newBuilder
sb.append("| Min: %-11s 50th Perc: %-12s 90th Perc: %-12s 95th Perc: %-12s |\n".format(
histogram.min, histogram.percentile(50.0D), histogram.percentile(90.0D), histogram.percentile(95.0D)))
sb.append("| 99th Perc: %-12s 99.9th Perc: %-12s Max: %-12s |".format(
histogram.percentile(99.0D), histogram.percentile(99.9D), histogram.max))
sb.toString()
}
def histogramView(histogram: Histogram.Snapshot): String =
"| Min: %-12s Average: %-12s Max: %-12s |"
.format(histogram.min, histogram.average, histogram.max)
}
object LogReporterSubscriber {
implicit class RichHistogramSnapshot(histogram: Histogram.Snapshot) {
def average: Double = {
if (histogram.numberOfMeasurements == 0) 0D
else histogram.sum / histogram.numberOfMeasurements
}
}
}
|
