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OtelMetricsTests and Metrics example
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core-jvm-tests/src/test/scala/org/http4s/otel4s/OtelMetricsTests.scala
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| /* | ||
| * Copyright 2023 http4s.org | ||
| * | ||
| * 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 org.http4s.otel4s | ||
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|
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| import cats.data.OptionT | ||
| import cats.effect.IO | ||
| import io.opentelemetry.sdk.metrics.data.{MetricData => JMetricData} | ||
| import munit.CatsEffectSuite | ||
| import org.http4s._ | ||
| import org.http4s.server.middleware.Metrics | ||
| import org.typelevel.otel4s.metrics.Meter | ||
| import org.typelevel.otel4s.oteljava.AttributeConverters._ | ||
| import org.typelevel.otel4s.oteljava.testkit.metrics.MetricsTestkit | ||
| import io.opentelemetry.api.common.{Attributes => JAttributes} | ||
| import scala.jdk.CollectionConverters._ | ||
|
|
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| class OtelMetricsTests extends CatsEffectSuite { | ||
| test("OtelMetrics") { | ||
| MetricsTestkit | ||
| .inMemory[IO]() | ||
| .use { testkit => | ||
| for { | ||
| meterIO <- testkit.meterProvider.get("meter") | ||
| metricsOps <- { | ||
| implicit val meter: Meter[IO] = meterIO | ||
| OtelMetrics.metricsOps[IO]() | ||
| } | ||
| _ <- { | ||
| val fakeServer = | ||
| HttpRoutes[IO](e => OptionT.liftF(e.body.compile.drain.as(Response[IO](Status.Ok)))) | ||
| val meteredServer = Metrics[IO](metricsOps)(fakeServer) | ||
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|
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| meteredServer | ||
| .run(Request[IO](Method.GET)) | ||
| .semiflatMap(_.body.compile.drain) | ||
| .value | ||
| } | ||
| metrics <- testkit.collectMetrics[JMetricData] | ||
| } yield { | ||
| def attributes(attrs: JAttributes): Map[String, String] = | ||
| attrs.toScala.toSeq.map(e => e.key.name -> e.value.toString).toMap | ||
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| val activeRequests = metrics.find(_.getName == "http.server.active_requests").get | ||
| val activeRequestsDataPoints: Map[Map[String, String], Long] = | ||
| activeRequests.getLongSumData.getPoints.asScala.toList | ||
| .map(e => attributes(e.getAttributes) -> e.getValue) | ||
| .toMap | ||
|
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| val requestDuration = metrics.find(_.getName == "http.server.request.duration").get | ||
| val requestDurationDataPoints: Map[Map[String, String], Long] = | ||
| requestDuration.getHistogramData.getPoints.asScala.toList | ||
| .map(e => attributes(e.getAttributes) -> e.getCount) | ||
| .toMap | ||
|
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||
| assertEquals( | ||
| activeRequestsDataPoints, | ||
| Map( | ||
| Map("classifier" -> "") -> 0L | ||
| ), | ||
| ) | ||
|
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||
| assertEquals( | ||
| requestDurationDataPoints, | ||
| Map( | ||
| Map( | ||
| "classifier" -> "", | ||
| "http.phase" -> "headers", | ||
| "http.request.method" -> "GET", | ||
| ) -> 1L, | ||
| Map( | ||
| "classifier" -> "", | ||
| "http.phase" -> "body", | ||
| "http.request.method" -> "GET", | ||
| "http.response.status_code" -> "200", | ||
| ) -> 1L, | ||
| ), | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } |
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