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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.statsd
import akka.testkit.{ TestKitBase, TestProbe }
import akka.actor.{ ActorRef, Props, ActorSystem }
import kamon.Kamon
import kamon.metric.instrument.{ InstrumentFactory, UnitOfMeasurement }
import kamon.testkit.BaseKamonSpec
import kamon.util.MilliTimestamp
import org.scalatest.{ Matchers, WordSpecLike }
import kamon.metric._
import akka.io.Udp
import kamon.metric.SubscriptionsDispatcher.TickMetricSnapshot
import java.net.InetSocketAddress
import com.typesafe.config.ConfigFactory
class StatsDMetricSenderSpec extends BaseKamonSpec("statsd-metric-sender-spec") {
override lazy val config =
ConfigFactory.parseString(
"""
|kamon {
| statsd.simple-metric-key-generator {
| application = kamon
| hostname-override = kamon-host
| include-hostname = true
| metric-name-normalization-strategy = normalize
| }
|}
|
""".stripMargin)
implicit val metricKeyGenerator = new SimpleMetricKeyGenerator(system.settings.config) {
override def hostName: String = "localhost_local"
}
"the StatsDMetricSender" should {
"flush the metrics data after processing the tick, even if the max-packet-size is not reached" in new UdpListenerFixture {
val testMetricKey = buildMetricKey(testEntity, "metric-one")
val testRecorder = buildRecorder("user/kamon")
testRecorder.metricOne.record(10L)
val udp = setup(Map(testEntity -> testRecorder.collect(collectionContext)))
val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send]
data.utf8String should be(s"$testMetricKey:10|ms")
}
"render several measurements of the same key under a single (key + multiple measurements) packet" in new UdpListenerFixture {
val testMetricKey = buildMetricKey(testEntity, "metric-one")
val testRecorder = buildRecorder("user/kamon")
testRecorder.metricOne.record(10L)
testRecorder.metricOne.record(11L)
testRecorder.metricOne.record(12L)
val udp = setup(Map(testEntity -> testRecorder.collect(collectionContext)))
val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send]
data.utf8String should be(s"$testMetricKey:10|ms:11|ms:12|ms")
}
"include the correspondent sampling rate when rendering multiple occurrences of the same value" in new UdpListenerFixture {
val testMetricKey = buildMetricKey(testEntity, "metric-one")
val testRecorder = buildRecorder("user/kamon")
testRecorder.metricOne.record(10L)
testRecorder.metricOne.record(10L)
val udp = setup(Map(testEntity -> testRecorder.collect(collectionContext)))
val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send]
data.utf8String should be(s"$testMetricKey:10|ms|@0.5")
}
"flush the packet when the max-packet-size is reached" in new UdpListenerFixture {
val testMetricKey = buildMetricKey(testEntity, "metric-one")
val testRecorder = buildRecorder("user/kamon")
var bytes = testMetricKey.length
var level = 0
while (bytes <= testMaxPacketSize) {
level += 1
testRecorder.metricOne.record(level)
bytes += s":$level|ms".length
}
val udp = setup(Map(testEntity -> testRecorder.collect(collectionContext)))
udp.expectMsgType[Udp.Send] // let the first flush pass
val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send]
data.utf8String should be(s"$testMetricKey:$level|ms")
}
"render multiple keys in the same packet using newline as separator" in new UdpListenerFixture {
val testMetricKey1 = buildMetricKey(testEntity, "metric-one")
val testMetricKey2 = buildMetricKey(testEntity, "metric-two")
val testRecorder = buildRecorder("user/kamon")
testRecorder.metricOne.record(10L)
testRecorder.metricOne.record(10L)
testRecorder.metricOne.record(11L)
testRecorder.metricTwo.record(20L)
testRecorder.metricTwo.record(21L)
val udp = setup(Map(testEntity -> testRecorder.collect(collectionContext)))
val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send]
data.utf8String should be(s"$testMetricKey1:10|ms|@0.5:11|ms\n$testMetricKey2:20|ms:21|ms")
}
}
trait UdpListenerFixture {
val testMaxPacketSize = system.settings.config.getBytes("kamon.statsd.max-packet-size")
val testEntity = Entity("user/kamon", "test")
def buildMetricKey(entity: Entity, metricName: String)(implicit metricKeyGenerator: SimpleMetricKeyGenerator): String = {
val metricKey = HistogramKey(metricName, UnitOfMeasurement.Unknown)
metricKeyGenerator.generateKey(entity, metricKey)
}
def buildRecorder(name: String): TestEntityRecorder = {
Kamon.metrics.entity(TestEntityRecorder, name)
}
def setup(metrics: Map[Entity, EntitySnapshot]): TestProbe = {
val udp = TestProbe()
val metricsSender = system.actorOf(Props(new StatsDMetricsSender("127.0.0.1", 0, testMaxPacketSize, metricKeyGenerator) {
override def udpExtension(implicit system: ActorSystem): ActorRef = udp.ref
}))
// Setup the SimpleSender
udp.expectMsgType[Udp.SimpleSender]
udp.reply(Udp.SimpleSenderReady)
val fakeSnapshot = TickMetricSnapshot(MilliTimestamp.now, MilliTimestamp.now, metrics)
metricsSender ! fakeSnapshot
udp
}
}
}
class TestEntityRecorder(instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
val metricOne = histogram("metric-one")
val metricTwo = histogram("metric-two")
}
object TestEntityRecorder extends EntityRecorderFactory[TestEntityRecorder] {
def category: String = "test"
def createRecorder(instrumentFactory: InstrumentFactory): TestEntityRecorder = new TestEntityRecorder(instrumentFactory)
}
|
