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102
sdk/trace/src/main/scala/org/typelevel/otel4s/sdk/trace/processor/SimpleSpanProcessor.scala
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * Copyright 2023 Typelevel | ||
| * | ||
| * 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.typelevel.otel4s.sdk.trace | ||
| package processor | ||
|
|
||
| import cats.MonadThrow | ||
| import cats.effect.std.Console | ||
| import cats.syntax.applicative._ | ||
| import cats.syntax.applicativeError._ | ||
| import cats.syntax.flatMap._ | ||
| import cats.syntax.functor._ | ||
| import org.typelevel.otel4s.sdk.trace.data.SpanData | ||
| import org.typelevel.otel4s.sdk.trace.exporter.SpanExporter | ||
| import org.typelevel.otel4s.trace.SpanContext | ||
|
|
||
| import scala.util.control.NonFatal | ||
|
|
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| /** An implementation of the [[SpanProcessor]] that passes ended | ||
| * [[data.SpanData SpanData]] directly to the configured exporter. | ||
| * | ||
| * @note | ||
| * this processor exports spans individually upon completion, resulting in a | ||
| * single span per export request. | ||
| * | ||
| * @see | ||
| * [[https://opentelemetry.io/docs/specs/otel/trace/sdk/#simple-processor]] | ||
| * | ||
| * @tparam F | ||
| * the higher-kinded type of a polymorphic effect | ||
| */ | ||
| final class SimpleSpanProcessor[F[_]: MonadThrow: Console] private ( | ||
| exporter: SpanExporter[F], | ||
| exportOnlySampled: Boolean | ||
| ) extends SpanProcessor[F] { | ||
|
|
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| val isStartRequired: Boolean = false | ||
| val isEndRequired: Boolean = true | ||
|
|
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| def onStart(parentContext: Option[SpanContext], span: SpanRef[F]): F[Unit] = | ||
| MonadThrow[F].unit | ||
|
|
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| def onEnd(span: SpanData): F[Unit] = { | ||
| val canExport = !exportOnlySampled || span.spanContext.isSampled | ||
| doExport(span).whenA(canExport) | ||
| } | ||
|
|
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| private def doExport(span: SpanData): F[Unit] = | ||
| exporter.exportSpans(List(span)).onError { | ||
| case e if NonFatal(e) => | ||
| for { | ||
| _ <- Console[F].errorln("SimpleSpanExporter: the export has failed") | ||
| _ <- Console[F].printStackTrace(e) | ||
| } yield () | ||
| } | ||
|
|
||
| def forceFlush: F[Unit] = | ||
| MonadThrow[F].unit | ||
| } | ||
|
|
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| object SimpleSpanProcessor { | ||
|
|
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| /** Creates a [[SimpleSpanProcessor]] that passes only '''sampled''' ended | ||
| * spans to the given `exporter`. | ||
| * | ||
| * @param exporter | ||
| * the [[exporter.SpanExporter SpanExporter]] to use | ||
| */ | ||
| def apply[F[_]: MonadThrow: Console]( | ||
| exporter: SpanExporter[F] | ||
| ): SimpleSpanProcessor[F] = | ||
| apply(exporter, exportOnlySampled = true) | ||
|
|
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| /** Creates a [[SimpleSpanProcessor]] that passes ended spans to the given | ||
| * `exporter`. | ||
| * | ||
| * @param exporter | ||
| * the [[exporter.SpanExporter SpanExporter]] to use | ||
| * | ||
| * @param exportOnlySampled | ||
| * whether to export only sampled spans | ||
| */ | ||
| def apply[F[_]: MonadThrow: Console]( | ||
| exporter: SpanExporter[F], | ||
| exportOnlySampled: Boolean | ||
| ): SimpleSpanProcessor[F] = | ||
| new SimpleSpanProcessor[F](exporter, exportOnlySampled) | ||
|
|
||
| } |
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190 changes: 190 additions & 0 deletions
190
...ce/src/test/scala/org/typelevel/otel4s/sdk/trace/processor/SimpleSpanProcessorSuite.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,190 @@ | ||
| /* | ||
| * Copyright 2023 Typelevel | ||
| * | ||
| * 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.typelevel.otel4s.sdk.trace | ||
| package processor | ||
|
|
||
| import cats.Foldable | ||
| import cats.effect.IO | ||
| import cats.syntax.foldable._ | ||
| import cats.syntax.traverse._ | ||
| import munit.CatsEffectSuite | ||
| import munit.ScalaCheckEffectSuite | ||
| import org.scalacheck.Arbitrary | ||
| import org.scalacheck.Test | ||
| import org.scalacheck.effect.PropF | ||
| import org.typelevel.otel4s.Attribute | ||
| import org.typelevel.otel4s.AttributeKey | ||
| import org.typelevel.otel4s.meta.InstrumentMeta | ||
| import org.typelevel.otel4s.sdk.common.InstrumentationScope | ||
| import org.typelevel.otel4s.sdk.trace.data.SpanData | ||
| import org.typelevel.otel4s.sdk.trace.exporter.InMemorySpanExporter | ||
| import org.typelevel.otel4s.sdk.trace.exporter.SpanExporter | ||
| import org.typelevel.otel4s.trace.Span | ||
| import org.typelevel.otel4s.trace.SpanContext | ||
| import org.typelevel.otel4s.trace.SpanKind | ||
| import org.typelevel.otel4s.trace.Status | ||
|
|
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| import scala.concurrent.duration.FiniteDuration | ||
|
|
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| class SimpleSpanProcessorSuite | ||
| extends CatsEffectSuite | ||
| with ScalaCheckEffectSuite { | ||
|
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| private implicit val spanDataArbitrary: Arbitrary[SpanData] = | ||
| Arbitrary(Gens.spanData) | ||
|
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| test("do nothing on start") { | ||
| PropF.forAllF { (spans: List[SpanData]) => | ||
| for { | ||
| exporter <- InMemorySpanExporter.create[IO](None) | ||
| processor = SimpleSpanProcessor(exporter, exportOnlySampled = true) | ||
| _ <- spans.traverse_(s => processor.onStart(None, constSpanRef(s))) | ||
| exported <- exporter.finishedSpans | ||
| } yield assert(exported.isEmpty) | ||
| } | ||
| } | ||
|
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| test("export only sampled spans on end (exportOnlySampled = true)") { | ||
| PropF.forAllF { (spans: List[SpanData]) => | ||
| val sampled = spans.filter(_.spanContext.isSampled) | ||
|
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| for { | ||
| exporter <- InMemorySpanExporter.create[IO](None) | ||
| processor = SimpleSpanProcessor(exporter, exportOnlySampled = true) | ||
| _ <- spans.traverse_(span => processor.onEnd(span)) | ||
| exported <- exporter.finishedSpans | ||
| } yield assertEquals(exported, sampled) | ||
| } | ||
| } | ||
|
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| test("export all spans on end (exportOnlySampled = false)") { | ||
| PropF.forAllF { (spans: List[SpanData]) => | ||
| for { | ||
| exporter <- InMemorySpanExporter.create[IO](None) | ||
| processor = SimpleSpanProcessor(exporter, exportOnlySampled = false) | ||
| _ <- spans.traverse_(span => processor.onEnd(span)) | ||
| exported <- exporter.finishedSpans | ||
| } yield assertEquals( | ||
| exported.map(_.spanContext.spanIdHex), | ||
| spans.map(_.spanContext.spanIdHex) | ||
| ) | ||
| } | ||
| } | ||
|
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| test("rethrow export errors") { | ||
| PropF.forAllF { (spans: List[SpanData]) => | ||
| val error = new RuntimeException("something went wrong") | ||
| val exporter = new FailingExporter("error-prone", error) | ||
| val processor = SimpleSpanProcessor(exporter, exportOnlySampled = false) | ||
|
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| for { | ||
| attempts <- spans.traverse(span => processor.onEnd(span).attempt) | ||
| } yield assertEquals(attempts, List.fill(spans.size)(Left(error))) | ||
| } | ||
| } | ||
|
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| private def constSpanRef(data: SpanData): SpanRef[IO] = { | ||
| new SpanRef[IO] with Span.Backend[IO] { | ||
| private val noopBackend = Span.Backend.noop[IO] | ||
|
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| def kind: SpanKind = | ||
| data.kind | ||
|
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| def scopeInfo: InstrumentationScope = | ||
| data.instrumentationScope | ||
|
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| def parentSpanContext: Option[SpanContext] = | ||
| data.parentSpanContext | ||
|
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| def name: IO[String] = | ||
| IO(data.name) | ||
|
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| def toSpanData: IO[SpanData] = | ||
| IO(data) | ||
|
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| def hasEnded: IO[Boolean] = | ||
| IO(false) | ||
|
|
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| def duration: IO[FiniteDuration] = | ||
| IO(data.startTimestamp) | ||
|
|
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| def getAttribute[A](key: AttributeKey[A]): IO[Option[A]] = | ||
| IO(data.attributes.get(key).map(_.value)) | ||
|
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| // span.backend | ||
|
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| val meta: InstrumentMeta[IO] = | ||
| noopBackend.meta | ||
|
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| val context: SpanContext = | ||
| noopBackend.context | ||
|
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| def updateName(name: String): IO[Unit] = | ||
| noopBackend.updateName(name) | ||
|
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| def addAttributes(attributes: Attribute[_]*): IO[Unit] = | ||
| noopBackend.addAttributes(attributes: _*) | ||
|
|
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| def addEvent(name: String, attributes: Attribute[_]*): IO[Unit] = | ||
| noopBackend.addEvent(name, attributes: _*) | ||
|
|
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| def addEvent( | ||
| name: String, | ||
| timestamp: FiniteDuration, | ||
| attributes: Attribute[_]* | ||
| ): IO[Unit] = | ||
| noopBackend.addEvent(name, timestamp, attributes: _*) | ||
|
|
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| def recordException( | ||
| exception: Throwable, | ||
| attributes: Attribute[_]* | ||
| ): IO[Unit] = | ||
| noopBackend.recordException(exception, attributes: _*) | ||
|
|
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| def setStatus(status: Status): IO[Unit] = | ||
| noopBackend.setStatus(status) | ||
|
|
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| def setStatus(status: Status, description: String): IO[Unit] = | ||
| noopBackend.setStatus(status, description) | ||
|
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| private[otel4s] def end: IO[Unit] = | ||
| noopBackend.end | ||
|
|
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| private[otel4s] def end(timestamp: FiniteDuration): IO[Unit] = | ||
| noopBackend.end(timestamp) | ||
| } | ||
| } | ||
|
|
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| override protected def scalaCheckTestParameters: Test.Parameters = | ||
| super.scalaCheckTestParameters | ||
| .withMinSuccessfulTests(10) | ||
| .withMaxSize(10) | ||
|
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| private class FailingExporter( | ||
| exporterName: String, | ||
| onExport: Throwable | ||
| ) extends SpanExporter[IO] { | ||
| def name: String = exporterName | ||
|
|
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| def exportSpans[G[_]: Foldable](spans: G[SpanData]): IO[Unit] = | ||
| IO.raiseError(onExport) | ||
|
|
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| def flush: IO[Unit] = | ||
| IO.unit | ||
| } | ||
|
|
||
| } |
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