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/*
* =========================================================================================
* 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.datadog
import akka.actor._
import kamon.Kamon
import kamon.metric._
import scala.concurrent.duration._
import scala.collection.JavaConverters._
import com.typesafe.config.Config
import java.lang.management.ManagementFactory
import akka.event.Logging
import java.net.InetSocketAddress
import java.util.concurrent.TimeUnit.MILLISECONDS
object Datadog extends ExtensionId[DatadogExtension] with ExtensionIdProvider {
override def lookup(): ExtensionId[_ <: Extension] = Datadog
override def createExtension(system: ExtendedActorSystem): DatadogExtension = new DatadogExtension(system)
trait MetricKeyGenerator {
def generateKey(groupIdentity: MetricGroupIdentity, metricIdentity: MetricIdentity): String
}
}
class DatadogExtension(system: ExtendedActorSystem) extends Kamon.Extension {
val log = Logging(system, classOf[DatadogExtension])
log.info("Starting the Kamon(Datadog) extension")
private val datadogConfig = system.settings.config.getConfig("kamon.datadog")
val datadogHost = new InetSocketAddress(datadogConfig.getString("hostname"), datadogConfig.getInt("port"))
val flushInterval = datadogConfig.getDuration("flush-interval", MILLISECONDS)
val maxPacketSizeInBytes = datadogConfig.getBytes("max-packet-size")
val tickInterval = system.settings.config.getDuration("kamon.metrics.tick-interval", MILLISECONDS)
val datadogMetricsListener = buildMetricsListener(tickInterval, flushInterval)
// Subscribe to Actors
val includedActors = datadogConfig.getStringList("includes.actor").asScala
for (actorPathPattern ← includedActors) {
Kamon(Metrics)(system).subscribe(ActorMetrics, actorPathPattern, datadogMetricsListener, permanently = true)
}
// Subscribe to Traces
val includedTraces = datadogConfig.getStringList("includes.trace").asScala
for (tracePathPattern ← includedTraces) {
Kamon(Metrics)(system).subscribe(TraceMetrics, tracePathPattern, datadogMetricsListener, permanently = true)
}
// Subscribe to Dispatchers
val includedDispatchers = datadogConfig.getStringList("includes.dispatcher").asScala
for (dispatcherPathPattern ← includedDispatchers) {
Kamon(Metrics)(system).subscribe(DispatcherMetrics, dispatcherPathPattern, datadogMetricsListener, permanently = true)
}
def buildMetricsListener(tickInterval: Long, flushInterval: Long): ActorRef = {
assert(flushInterval >= tickInterval, "Datadog flush-interval needs to be equal or greater to the tick-interval")
val metricsTranslator = system.actorOf(DatadogMetricsSender.props(datadogHost, maxPacketSizeInBytes), "datadog-metrics-sender")
if (flushInterval == tickInterval) {
// No need to buffer the metrics, let's go straight to the metrics sender.
metricsTranslator
} else {
system.actorOf(TickMetricSnapshotBuffer.props(flushInterval.toInt.millis, metricsTranslator), "datadog-metrics-buffer")
}
}
}
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