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|
/*
* =========================================================================================
* Copyright © 2013 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.metric
import akka.event.Logging.Error
import akka.event.EventStream
import scala.collection.concurrent.TrieMap
import akka.actor._
import com.typesafe.config.Config
import kamon.util.GlobPathFilter
import kamon.Kamon
import akka.actor
import kamon.metric.Metrics.MetricGroupFilter
import kamon.metric.Subscriptions.{ Unsubscribe, Subscribe }
import java.util.concurrent.TimeUnit
class MetricsExtension(system: ExtendedActorSystem) extends Kamon.Extension {
val metricsExtConfig = system.settings.config.getConfig("kamon.metrics")
printInitializationMessage(system.eventStream, metricsExtConfig.getBoolean("disable-aspectj-weaver-missing-error"))
/** Configured Dispatchers */
val metricSubscriptionsDispatcher = system.dispatchers.lookup(metricsExtConfig.getString("dispatchers.metric-subscriptions"))
val gaugeRecordingsDispatcher = system.dispatchers.lookup(metricsExtConfig.getString("dispatchers.gauge-recordings"))
/** Configuration Settings */
val gaugeRecordingInterval: Long = metricsExtConfig.getMilliseconds("gauge-recording-interval")
val storage = TrieMap[MetricGroupIdentity, MetricGroupRecorder]()
val filters = loadFilters(metricsExtConfig)
lazy val subscriptions = system.actorOf(Props[Subscriptions], "kamon-metrics-subscriptions")
def register(identity: MetricGroupIdentity, factory: MetricGroupFactory): Option[factory.GroupRecorder] = {
if (shouldTrack(identity))
Some(storage.getOrElseUpdate(identity, factory.create(metricsExtConfig, system)).asInstanceOf[factory.GroupRecorder])
else
None
}
def unregister(identity: MetricGroupIdentity): Unit = {
storage.remove(identity)
}
def subscribe[C <: MetricGroupCategory](category: C, selection: String, subscriber: ActorRef, permanently: Boolean = false): Unit =
subscriptions.tell(Subscribe(category, selection, subscriber, permanently), subscriber)
def unsubscribe(subscriber: ActorRef): Unit =
subscriptions.tell(Unsubscribe(subscriber), subscriber)
def scheduleGaugeRecorder(body: ⇒ Unit): Cancellable = {
import scala.concurrent.duration._
system.scheduler.schedule(gaugeRecordingInterval milliseconds, gaugeRecordingInterval milliseconds) {
body
}(gaugeRecordingsDispatcher)
}
private def shouldTrack(identity: MetricGroupIdentity): Boolean = {
filters.get(identity.category.name).map(filter ⇒ filter.accept(identity.name)).getOrElse(true)
}
def loadFilters(config: Config): Map[String, MetricGroupFilter] = {
import scala.collection.JavaConverters._
val filters = config.getObjectList("filters").asScala
val allFilters =
for (
filter ← filters;
entry ← filter.entrySet().asScala
) yield {
val key = entry.getKey
val keyBasedConfig = entry.getValue.atKey(key)
val includes = keyBasedConfig.getStringList(s"$key.includes").asScala.map(inc ⇒ new GlobPathFilter(inc)).toList
val excludes = keyBasedConfig.getStringList(s"$key.excludes").asScala.map(exc ⇒ new GlobPathFilter(exc)).toList
(key, MetricGroupFilter(includes, excludes))
}
allFilters.toMap
}
def buildDefaultCollectionContext: CollectionContext =
CollectionContext(metricsExtConfig.getInt("default-collection-context-buffer-size"))
def printInitializationMessage(eventStream: EventStream, disableWeaverMissingError: Boolean): Unit = {
if (!disableWeaverMissingError) {
val weaverMissingMessage =
"""
|
| ___ _ ___ _ _ ___ ___ _ _
| / _ \ | | |_ | | | | | | \/ |(_) (_)
|/ /_\ \ ___ _ __ ___ ___ | |_ | | | | | | ___ __ _ __ __ ___ _ __ | . . | _ ___ ___ _ _ __ __ _
|| _ |/ __|| '_ \ / _ \ / __|| __| | | | |/\| | / _ \ / _` |\ \ / // _ \| '__| | |\/| || |/ __|/ __|| || '_ \ / _` |
|| | | |\__ \| |_) || __/| (__ | |_ /\__/ / \ /\ /| __/| (_| | \ V /| __/| | | | | || |\__ \\__ \| || | | || (_| |
|\_| |_/|___/| .__/ \___| \___| \__|\____/ \/ \/ \___| \__,_| \_/ \___||_| \_| |_/|_||___/|___/|_||_| |_| \__, |
| | | __/ |
| |_| |___/
|
| It seems like your application wasn't started with the -javaagent:/path-to-aspectj-weaver.jar option. Without that Kamon might
| not work properly, if you need help on setting up the weaver go to http://kamon.io/introduction/get-started/ for more info. If
| you are sure that you don't need the weaver (e.g. you are only using KamonStandalone) then you can disable this error message
| by changing the kamon.metrics.disable-aspectj-weaver-missing-error setting in your configuration file.
|
""".stripMargin
eventStream.publish(Error("MetricsExtension", classOf[MetricsExtension], weaverMissingMessage))
}
}
}
object Metrics extends ExtensionId[MetricsExtension] with ExtensionIdProvider {
def lookup(): ExtensionId[_ <: actor.Extension] = Metrics
def createExtension(system: ExtendedActorSystem): MetricsExtension = new MetricsExtension(system)
case class MetricGroupFilter(includes: List[GlobPathFilter], excludes: List[GlobPathFilter]) {
def accept(name: String): Boolean = includes.exists(_.accept(name)) && !excludes.exists(_.accept(name))
}
}
|
