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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.newrelic
import akka.actor.{ActorLogging, Actor}
import spray.json._
import scala.concurrent.Future
import spray.httpx.{SprayJsonSupport, RequestBuilding, ResponseTransformation}
import spray.httpx.encoding.Deflate
import spray.http._
import spray.json.lenses.JsonLenses._
import akka.pattern.pipe
import java.lang.management.ManagementFactory
import spray.client.pipelining._
import scala.util.control.NonFatal
import kamon.newrelic.NewRelicMetric.{Data, ID, MetricBatch}
class Agent extends Actor with RequestBuilding with ResponseTransformation with SprayJsonSupport with ActorLogging {
import context.dispatcher
import Agent._
val agentInfo = {
val config = context.system.settings.config.getConfig("kamon.newrelic")
val appName = config.getString("app-name")
val licenseKey = config.getString("license-key")
// Name has the format of pid@host
val runtimeName = ManagementFactory.getRuntimeMXBean.getName.split('@')
AgentInfo(licenseKey, appName, runtimeName(1), runtimeName(0).toInt)
}
def receive = {
case Initialize(runId, collector) => context become reporting(runId, collector)
}
def reporting(runId: Long, collector: String): Receive = {
case batch: MetricBatch => sendMetricData(runId, collector, batch.metrics)
}
override def preStart(): Unit = {
super.preStart()
initialize
}
def initialize: Unit = {
pipe ({
for(
collector <- selectCollector;
runId <- connect(collector, agentInfo)
) yield Initialize(runId, collector)
} recover {
case NonFatal(ex) => InitializationFailed(ex)
}) to self
}
import AgentJsonProtocol._
val compressedPipeline: HttpRequest => Future[HttpResponse] = encode(Deflate) ~> sendReceive
val compressedToJsonPipeline: HttpRequest => Future[JsValue] = compressedPipeline ~> toJson
def toJson(response: HttpResponse): JsValue = response.entity.asString.asJson
def selectCollector: Future[String] = {
compressedToJsonPipeline {
Post(s"http://collector.newrelic.com/agent_listener/invoke_raw_method?method=get_redirect_host&license_key=${agentInfo.licenseKey}&marshal_format=json&protocol_version=12", JsArray())
} map { json =>
json.extract[String]('return_value)
}
}
def connect(collectorHost: String, connect: AgentInfo): Future[Long] = {
compressedToJsonPipeline {
Post(s"http://$collectorHost/agent_listener/invoke_raw_method?method=connect&license_key=${agentInfo.licenseKey}&marshal_format=json&protocol_version=12", connect)
} map { json =>
json.extract[Long]('return_value / 'agent_run_id)
}
}
def sendMetricData(runId: Long, collector: String, metrics: List[(ID, Data)]) = {
log.info("Reporting this to NewRelic: " + metrics.mkString("\n"))
val end = System.currentTimeMillis() / 1000L
val start = end - 60
compressedPipeline {
Post(s"http://$collector/agent_listener/invoke_raw_method?method=metric_data&license_key=${agentInfo.licenseKey}&marshal_format=json&protocol_version=12&run_id=$runId", MetricData(runId, start, end, metrics))
}
}
}
object Agent {
case class Initialize(runId: Long, collector: String)
case class InitializationFailed(reason: Throwable)
case class CollectorSelection(return_value: String)
case class AgentInfo(licenseKey: String, appName: String, host: String, pid: Int)
case class MetricData(runId: Long, start: Long, end: Long, metrics: List[(ID, Data)])
}
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