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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 akka.actor.{ ActorRef, ActorSystem, Props }
import akka.io.IO
import akka.testkit.TestActor.{ AutoPilot, KeepRunning }
import akka.testkit._
import com.typesafe.config.ConfigFactory
import kamon.AkkaExtensionSwap
import kamon.newrelic.MetricTranslator.TimeSliceMetrics
import org.scalatest.{ BeforeAndAfterAll, WordSpecLike }
import spray.can.Http
import spray.http.{ HttpRequest, HttpResponse, _ }
class AgentSpec extends TestKitBase with WordSpecLike with BeforeAndAfterAll {
import kamon.newrelic.AgentSpec._
implicit lazy val system: ActorSystem = ActorSystem("Agent-Spec", ConfigFactory.parseString(
"""
|akka {
| loggers = ["akka.testkit.TestEventListener"]
| loglevel = "INFO"
|}
|kamon {
| newrelic {
| retry-delay = 1 second
| max-retry = 3
| }
|}
|
""".stripMargin))
var agent: ActorRef = _
setupFakeHttpManager
"the Newrelic Agent" should {
"try to connect upon creation, retry to connect if an error occurs" in {
EventFilter.info(message = "Initialization failed: Unexpected response from HTTP transport: None, retrying in 1 seconds", occurrences = 3).intercept {
system.actorOf(Props[Agent])
Thread.sleep(1000)
}
}
"when everything is fine should select a NewRelic collector" in {
EventFilter.info(message = "Agent initialized with runID: [161221111] and collector: [collector-8.newrelic.com]", occurrences = 1).intercept {
system.actorOf(Props[Agent])
}
}
"merge the metrics if not possible send them and do it in the next post" in {
EventFilter.info(pattern = "Trying to send metrics to NewRelic collector, attempt.*", occurrences = 2).intercept {
agent = system.actorOf(Props[Agent].withDispatcher(CallingThreadDispatcher.Id))
for (_ ← 1 to 3) {
sendDelayedMetric(agent)
}
}
}
"when the connection is re-established, the metrics should be send" in {
EventFilter.info(message = "Sending metrics to NewRelic collector", occurrences = 2).intercept {
sendDelayedMetric(agent)
}
}
}
def setupFakeHttpManager: Unit = {
val ConnectionAttempts = 3 // an arbitrary value only for testing purposes
val PostAttempts = 3 // if the number is achieved, the metrics should be discarded
val fakeHttpManager = TestProbe()
var attemptsToConnect: Int = 0 // should retry grab an NewRelic collector after retry-delay
var attemptsToSendMetrics: Int = 0
fakeHttpManager.setAutoPilot(new TestActor.AutoPilot {
def run(sender: ActorRef, msg: Any): AutoPilot = {
msg match {
case HttpRequest(_, uri, _, _, _) if rawMethodIs("get_redirect_host", uri) ⇒
if (attemptsToConnect == ConnectionAttempts) {
sender ! jsonResponse(
"""
| {
| "return_value": "collector-8.newrelic.com"
| }
| """.stripMargin)
system.log.info("Selecting Collector")
} else {
sender ! None
attemptsToConnect += 1
system.log.info("Network Error or Connection Refuse")
}
case HttpRequest(_, uri, _, _, _) if rawMethodIs("connect", uri) ⇒
sender ! jsonResponse(
"""
| {
| "return_value": {
| "agent_run_id": 161221111
| }
| }
| """.stripMargin)
system.log.info("Connecting")
case HttpRequest(_, uri, _, _, _) if rawMethodIs("metric_data", uri) ⇒
if (attemptsToSendMetrics < PostAttempts) {
sender ! None
attemptsToSendMetrics += 1
system.log.info("Error when trying to send metrics to NewRelic collector, the metrics will be merged")
} else {
system.log.info("Sending metrics to NewRelic collector")
}
}
KeepRunning
}
def jsonResponse(json: String): HttpResponse = {
HttpResponse(entity = HttpEntity(ContentTypes.`application/json`, json))
}
def rawMethodIs(method: String, uri: Uri): Boolean = {
uri.query.get("method").filter(_ == method).isDefined
}
})
AkkaExtensionSwap.swap(system, Http, new IO.Extension {
def manager: ActorRef = fakeHttpManager.ref
})
}
override def afterAll() {
super.afterAll()
system.shutdown()
}
}
object AgentSpec {
def sendDelayedMetric(agent: ActorRef, delay: Int = 1000): Unit = {
agent ! TimeSliceMetrics(100000L, 200000L, Map("Latency" -> NewRelic.Metric("Latency", None, 1000L, 2000D, 3000D, 1D, 100000D, 300D)))
Thread.sleep(delay)
}
}
|
