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Merge pull request #240 from kovstas/sdk-resource-class
Add Resource entity
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91 changes: 91 additions & 0 deletions
91
sdk/common/src/main/scala/org/typelevel/otel4s/sdk/Attributes.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.typelevel.otel4s.sdk | ||
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| import cats.Applicative | ||
| import cats.Monad | ||
| import cats.Monoid | ||
| import cats.Show | ||
| import cats.implicits._ | ||
| import org.typelevel.otel4s.Attribute | ||
| import org.typelevel.otel4s.Attribute.KeySelect | ||
| import org.typelevel.otel4s.AttributeKey | ||
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| /** An immutable collection of [[Attribute]]s. | ||
| */ | ||
| final class Attributes private ( | ||
| private val m: Map[AttributeKey[_], Attribute[_]] | ||
| ) { | ||
| def get[T: KeySelect](name: String): Option[Attribute[T]] = { | ||
| val key = KeySelect[T].make(name) | ||
| m.get(key).map(_.asInstanceOf[Attribute[T]]) | ||
| } | ||
| def get[T](key: AttributeKey[T]): Option[Attribute[T]] = | ||
| m.get(key).map(_.asInstanceOf[Attribute[T]]) | ||
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| def isEmpty: Boolean = m.isEmpty | ||
| def size: Int = m.size | ||
| def contains(key: AttributeKey[_]): Boolean = m.contains(key) | ||
| def foldLeft[F[_]: Monad, B](z: B)(f: (B, Attribute[_]) => F[B]): F[B] = | ||
| m.foldLeft(Monad[F].pure(z)) { (acc, v) => | ||
| acc.flatMap { b => | ||
| f(b, v._2) | ||
| } | ||
| } | ||
| def forall[F[_]: Monad](p: Attribute[_] => F[Boolean]): F[Boolean] = | ||
| foldLeft(true)((b, a) => { | ||
| if (b) p(a).map(b && _) | ||
| else Monad[F].pure(false) | ||
| }) | ||
| def foreach[F[_]: Applicative](f: Attribute[_] => F[Unit]): F[Unit] = | ||
| m.foldLeft(Applicative[F].unit) { (acc, v) => | ||
| acc *> f(v._2) | ||
| } | ||
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| def toMap: Map[AttributeKey[_], Attribute[_]] = m | ||
| def toList: List[Attribute[_]] = m.values.toList | ||
|
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| } | ||
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| object Attributes { | ||
|
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| val Empty = new Attributes(Map.empty) | ||
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| def apply(attributes: Attribute[_]*): Attributes = { | ||
| val builder = Map.newBuilder[AttributeKey[_], Attribute[_]] | ||
| attributes.foreach { a => | ||
| builder += (a.key -> a) | ||
| } | ||
| new Attributes(builder.result()) | ||
| } | ||
|
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| implicit val showAttributes: Show[Attributes] = Show.show { attributes => | ||
| attributes.toList | ||
| .map(a => show"$a") | ||
| .mkString("Attributes(", ", ", ")") | ||
| } | ||
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| implicit val monoidAttributes: Monoid[Attributes] = | ||
| new Monoid[Attributes] { | ||
| def empty: Attributes = Attributes.Empty | ||
| def combine(x: Attributes, y: Attributes): Attributes = { | ||
| if (y.isEmpty) x | ||
| else if (x.isEmpty) y | ||
| else new Attributes(x.m ++ y.m) | ||
| } | ||
| } | ||
| } |
125 changes: 125 additions & 0 deletions
125
sdk/common/src/main/scala/org/typelevel/otel4s/sdk/Resource.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.typelevel.otel4s.sdk | ||
|
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| import cats.Show | ||
| import cats.implicits.catsSyntaxEitherId | ||
| import cats.implicits.catsSyntaxOptionId | ||
| import cats.implicits.catsSyntaxSemigroup | ||
| import cats.implicits.showInterpolator | ||
| import org.typelevel.otel4s.Attribute | ||
| import org.typelevel.otel4s.sdk.BuildInfo | ||
| import org.typelevel.otel4s.sdk.Resource.ResourceInitiationError | ||
| import org.typelevel.otel4s.semconv.resource.attributes.ResourceAttributes._ | ||
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| /** [[Resource]] serves as a representation of a resource that captures | ||
| * essential identifying information regarding the entities associated with | ||
| * reported signals, such as statistics or traces. | ||
| * @param attributes | ||
| * \- a collection of [[Attribute]]s | ||
| * @param schemaUrl | ||
| * \- an optional schema URL | ||
| */ | ||
| final case class Resource( | ||
| attributes: Attributes, | ||
| schemaUrl: Option[String] | ||
| ) { | ||
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| /** Merges [[Resource]] into another [[Resource]]. If the same attribute | ||
| * exists in both resources, the attribute in the other [[Resource]] will be | ||
| * used. | ||
| * @param other | ||
| * \- the other [[Resource]] to merge into. | ||
| * @return | ||
| * a new [[Resource]] with the merged attributes. | ||
| */ | ||
| def mergeInto(other: Resource): Either[ResourceInitiationError, Resource] = { | ||
| if (other == Resource.Empty) this.asRight | ||
| else { | ||
| val schemaUrlOptEither = (other.schemaUrl, schemaUrl) match { | ||
| case (Some(otherUrl), Some(url)) => | ||
| if (otherUrl == url) | ||
| url.some.asRight | ||
| else | ||
| ResourceInitiationError.SchemaUrlConflict.asLeft | ||
| case (otherUrl, url) => | ||
| otherUrl.orElse(url).asRight | ||
| } | ||
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| schemaUrlOptEither.map( | ||
| Resource( | ||
| other.attributes |+| attributes, | ||
| _ | ||
| ) | ||
| ) | ||
| } | ||
| } | ||
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| /** Unsafe version of [[Resource.mergeInto]] which throws an exception if the | ||
| * merge fails. | ||
| */ | ||
| private def mergeIntoUnsafe(other: Resource): Resource = | ||
| mergeInto(other).fold( | ||
| throw _, | ||
| identity | ||
| ) | ||
| } | ||
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| object Resource { | ||
| sealed abstract class ResourceInitiationError extends Throwable | ||
| object ResourceInitiationError { | ||
| case object SchemaUrlConflict extends ResourceInitiationError | ||
| } | ||
|
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| def apply(attributes: Attributes): Resource = | ||
| Resource(attributes, None) | ||
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| /** Returns an empty [[Resource]]. It is strongly recommended to start with | ||
| * [[Resource.Default]] instead of this method to include SDK required | ||
| * attributes. | ||
| * | ||
| * @return | ||
| * an empty [[Resource]]. | ||
| */ | ||
| val Empty: Resource = Resource(Attributes.Empty) | ||
|
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| private val TelemetrySdk: Resource = Resource( | ||
| Attributes( | ||
| Attribute(TelemetrySdkName, "otel4s"), | ||
| Attribute(TelemetrySdkLanguage, TelemetrySdkLanguageValue.Scala.value), | ||
| Attribute(TelemetrySdkVersion, BuildInfo.version) | ||
| ) | ||
| ) | ||
|
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| private val Mandatory: Resource = Resource( | ||
| Attributes( | ||
| Attribute(ServiceName, "unknown_service:scala") | ||
| ) | ||
| ) | ||
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| /** Returns the default [[Resource]]. This resource contains the default | ||
| * attributes provided by the SDK. | ||
| * | ||
| * @return | ||
| * a [[Resource]]. | ||
| */ | ||
| val Default: Resource = TelemetrySdk.mergeIntoUnsafe(Mandatory) | ||
|
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| implicit val showResource: Show[Resource] = | ||
| r => show"Resource(${r.attributes}, ${r.schemaUrl})" | ||
|
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| } |
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