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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.newrelic
import java.util.concurrent.TimeUnit.{ MILLISECONDS ⇒ milliseconds }
import akka.actor.{ ActorSystem, ActorLogging, Actor }
import akka.event.LoggingAdapter
import akka.io.IO
import akka.util.Timeout
import kamon.Kamon
import kamon.metric.{ CollectionContext, Metrics }
import spray.can.Http
import spray.json._
import scala.concurrent.{ ExecutionContext, Future }
import spray.httpx.{ SprayJsonSupport, ResponseTransformation }
import spray.http._
import spray.json.lenses.JsonLenses._
import java.lang.management.ManagementFactory
import spray.http.Uri.Query
import scala.concurrent.duration._
import Agent._
import akka.pattern.pipe
// TODO: Setup a proper host connector with custom timeout configuration for use with this.
class Agent extends Actor with ClientPipelines with ResponseTransformation with SprayJsonSupport with ActorLogging {
import JsonProtocol._
import context.dispatcher
implicit val operationTimeout = Timeout(30 seconds)
val collectorClient = compressedToJsonPipeline(IO(Http)(context.system))
val settings = buildAgentSettings(context.system)
val baseQuery = Query(
"license_key" -> settings.licenseKey,
"marshal_format" -> "json",
"protocol_version" -> "12")
// Start the connection to the New Relic collector.
self ! Initialize
def receive: Receive = uninitialized(settings.maxRetries)
def uninitialized(attemptsLeft: Int): Receive = {
case Initialize ⇒ pipe(connectToCollector) to self
case Initialized(runID, collector) ⇒
log.info("Agent initialized with runID: [{}] and collector: [{}]", runID, collector)
val baseCollectorUri = Uri(s"http://$collector/agent_listener/invoke_raw_method").withQuery(baseQuery)
context.actorOf(MetricReporter.props(settings, runID, baseCollectorUri), "metric-reporter")
case InitializationFailed(reason) if (attemptsLeft > 0) ⇒
log.error(reason, "Initialization failed, retrying in {} seconds", settings.retryDelay.toSeconds)
context.system.scheduler.scheduleOnce(settings.retryDelay, self, Initialize)
context become (uninitialized(attemptsLeft - 1))
case InitializationFailed(reason) ⇒
log.error(reason, "Giving up while trying to set up a connection with the New Relic collector.")
context.stop(self)
}
def connectToCollector: Future[InitResult] = {
(for {
collector ← selectCollector
runId ← connect(collector, settings)
} yield Initialized(runId, collector)) recover { case error ⇒ InitializationFailed(error) }
}
def selectCollector: Future[String] = {
val query = ("method" -> "get_redirect_host") +: baseQuery
val getRedirectHostUri = Uri("http://collector.newrelic.com/agent_listener/invoke_raw_method").withQuery(query)
collectorClient {
Post(getRedirectHostUri, JsArray())
} map { json ⇒
json.extract[String]('return_value)
}
}
def connect(collectorHost: String, connect: Settings): Future[Long] = {
log.debug("Connecting to NewRelic Collector [{}]", collectorHost)
val query = ("method" -> "connect") +: baseQuery
val connectUri = Uri(s"http://$collectorHost/agent_listener/invoke_raw_method").withQuery(query)
collectorClient {
Post(connectUri, connect)
} map { json ⇒
json.extract[Long]('return_value / 'agent_run_id)
}
}
}
object Agent {
case object Initialize
sealed trait InitResult
case class Initialized(runId: Long, collector: String) extends InitResult
case class InitializationFailed(reason: Throwable) extends InitResult
case class Settings(licenseKey: String, appName: String, host: String, pid: Int, maxRetries: Int, retryDelay: FiniteDuration, apdexT: Double)
def buildAgentSettings(system: ActorSystem) = {
val config = system.settings.config.getConfig("kamon.newrelic")
val appName = config.getString("app-name")
val licenseKey = config.getString("license-key")
val maxRetries = config.getInt("max-initialize-retries")
val retryDelay = FiniteDuration(config.getDuration("initialize-retry-delay", milliseconds), milliseconds)
val apdexT: Double = config.getDuration("apdexT", MILLISECONDS) / 1E3 // scale to seconds.
// Name has the format of 'pid'@'host'
val runtimeName = ManagementFactory.getRuntimeMXBean.getName.split('@')
Agent.Settings(licenseKey, appName, runtimeName(1), runtimeName(0).toInt, maxRetries, retryDelay, apdexT)
}
}
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