From 29068fc70a3e5a17a630c2c7fff951572bb5fa21 Mon Sep 17 00:00:00 2001 From: Ivan Topolnjak Date: Thu, 3 Jul 2014 14:36:42 -0300 Subject: ! all: refactor the core metric recording instruments and accomodate UserMetrics This PR is including several changes to the kamon-core, most notably: - Formalize the interface for Histograms, Counters and MinMaxCounters. Making sure that the interfaces are as clean as possible. - Move away from the all Vector[Measurement] based Histogram snapshot to a new approach in which we use a single long to store both the index in the counts array and the frequency on that bucket. The leftmost 2 bytes of each long are used for storing the counts array index and the remaining 6 bytes are used for the actual count, and everything is put into a simple long array. This way only the buckets that actually have values will be included in the snapshot with the smallest possible memory footprint. - Introduce Gauges. - Reorganize the instrumentation for Akka and Scala and rewrite most of the tests of this components to avoid going through the subscription protocol to test. - Introduce trace tests and fixes on various tests. - Necessary changes on new relic, datadog and statsd modules to compile with the new codebase. Pending: - Finish the upgrade of the new relic to the current model. - Introduce proper limit checks for histograms to ensure that we never pass the 2/6 bytes limits. - More testing, more testing, more testing. - Create the KamonStandalone module. --- .../kamon/statsd/StatsDMetricSenderSpec.scala | 40 +++++++++++++--------- 1 file changed, 23 insertions(+), 17 deletions(-) (limited to 'kamon-statsd/src/test/scala/kamon/statsd') diff --git a/kamon-statsd/src/test/scala/kamon/statsd/StatsDMetricSenderSpec.scala b/kamon-statsd/src/test/scala/kamon/statsd/StatsDMetricSenderSpec.scala index 9dfd05f7..19d8a80b 100644 --- a/kamon-statsd/src/test/scala/kamon/statsd/StatsDMetricSenderSpec.scala +++ b/kamon-statsd/src/test/scala/kamon/statsd/StatsDMetricSenderSpec.scala @@ -18,11 +18,12 @@ package kamon.statsd import akka.testkit.{ TestKitBase, TestProbe } import akka.actor.{ ActorRef, Props, ActorSystem } +import kamon.metric.instrument.Histogram.Precision +import kamon.metric.instrument.{ Histogram, HdrHistogram } import org.scalatest.{ Matchers, WordSpecLike } -import kamon.metrics._ +import kamon.metric._ import akka.io.Udp -import org.HdrHistogram.HdrRecorder -import kamon.metrics.Subscriptions.TickMetricSnapshot +import kamon.metric.Subscriptions.TickMetricSnapshot import java.lang.management.ManagementFactory import java.net.InetSocketAddress import com.typesafe.config.ConfigFactory @@ -31,14 +32,16 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers implicit lazy val system = ActorSystem("statsd-metric-sender-spec", ConfigFactory.parseString("kamon.statsd.max-packet-size = 256 bytes")) + val context = CollectionContext.default + "the StatsDMetricSender" should { "flush the metrics data after processing the tick, even if the max-packet-size is not reached" in new UdpListenerFixture { val testMetricName = "test-metric" val testMetricKey = buildMetricKey(testMetricName) - val testRecorder = HdrRecorder(1000L, 2, Scale.Unit) + val testRecorder = Histogram(1000L, Precision.Normal, Scale.Unit) testRecorder.record(10L) - val udp = setup(Map(testMetricName -> testRecorder.collect())) + val udp = setup(Map(testMetricName -> testRecorder.collect(context))) val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send] data.utf8String should be(s"$testMetricKey:10|ms") @@ -47,12 +50,12 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers "render several measurements of the same key under a single (key + multiple measurements) packet" in new UdpListenerFixture { val testMetricName = "test-metric" val testMetricKey = buildMetricKey(testMetricName) - val testRecorder = HdrRecorder(1000L, 2, Scale.Unit) + val testRecorder = Histogram(1000L, Precision.Normal, Scale.Unit) testRecorder.record(10L) testRecorder.record(11L) testRecorder.record(12L) - val udp = setup(Map(testMetricName -> testRecorder.collect())) + val udp = setup(Map(testMetricName -> testRecorder.collect(context))) val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send] data.utf8String should be(s"$testMetricKey:10|ms:11|ms:12|ms") @@ -61,11 +64,11 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers "include the correspondent sampling rate when rendering multiple occurrences of the same value" in new UdpListenerFixture { val testMetricName = "test-metric" val testMetricKey = buildMetricKey(testMetricName) - val testRecorder = HdrRecorder(1000L, 2, Scale.Unit) + val testRecorder = Histogram(1000L, Precision.Normal, Scale.Unit) testRecorder.record(10L) testRecorder.record(10L) - val udp = setup(Map(testMetricName -> testRecorder.collect())) + val udp = setup(Map(testMetricName -> testRecorder.collect(context))) val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send] data.utf8String should be(s"$testMetricKey:10|ms|@0.5") @@ -74,7 +77,7 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers "flush the packet when the max-packet-size is reached" in new UdpListenerFixture { val testMetricName = "test-metric" val testMetricKey = buildMetricKey(testMetricName) - val testRecorder = HdrRecorder(testMaxPacketSize, 3, Scale.Unit) + val testRecorder = Histogram(10000L, Precision.Normal, Scale.Unit) var bytes = testMetricKey.length var level = 0 @@ -84,7 +87,7 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers bytes += s":$level|ms".length } - val udp = setup(Map(testMetricName -> testRecorder.collect())) + val udp = setup(Map(testMetricName -> testRecorder.collect(context))) udp.expectMsgType[Udp.Send] // let the first flush pass val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send] @@ -97,8 +100,8 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers val secondTestMetricName = "second-test-metric" val secondTestMetricKey = buildMetricKey(secondTestMetricName) - val firstTestRecorder = HdrRecorder(1000L, 2, Scale.Unit) - val secondTestRecorder = HdrRecorder(1000L, 2, Scale.Unit) + val firstTestRecorder = Histogram(1000L, Precision.Normal, Scale.Unit) + val secondTestRecorder = Histogram(1000L, Precision.Normal, Scale.Unit) firstTestRecorder.record(10L) firstTestRecorder.record(10L) @@ -108,8 +111,8 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers secondTestRecorder.record(21L) val udp = setup(Map( - firstTestMetricName -> firstTestRecorder.collect(), - secondTestMetricName -> secondTestRecorder.collect())) + firstTestMetricName -> firstTestRecorder.collect(context), + secondTestMetricName -> secondTestRecorder.collect(context))) val Udp.Send(data, _, _) = udp.expectMsgType[Udp.Send] data.utf8String should be(s"$firstTestMetricKey:10|ms|@0.5:11|ms\n$secondTestMetricKey:20|ms:21|ms") @@ -122,7 +125,7 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers def buildMetricKey(metricName: String): String = s"kamon.$localhostName.test-metric-category.test-group.$metricName" - def setup(metrics: Map[String, MetricSnapshotLike]): TestProbe = { + def setup(metrics: Map[String, MetricSnapshot]): TestProbe = { val udp = TestProbe() val metricsSender = system.actorOf(Props(new StatsDMetricsSender(new InetSocketAddress(localhostName, 0), testMaxPacketSize) { override def udpExtension(implicit system: ActorSystem): ActorRef = udp.ref @@ -149,7 +152,10 @@ class StatsDMetricSenderSpec extends TestKitBase with WordSpecLike with Matchers } metricsSender ! TickMetricSnapshot(0, 0, Map(testGroupIdentity -> new MetricGroupSnapshot { - val metrics: Map[MetricIdentity, MetricSnapshotLike] = testMetrics.toMap + type GroupSnapshotType = Histogram.Snapshot + def merge(that: GroupSnapshotType, context: CollectionContext): GroupSnapshotType = ??? + + val metrics: Map[MetricIdentity, MetricSnapshot] = testMetrics.toMap })) udp -- cgit v1.2.3