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Info.scala
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Info.scala
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/*
* Copyright 2022 Permutive
*
* 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 prometheus4cats
import java.util.regex.Pattern
import cats.{Applicative, Contravariant, ~>}
sealed abstract class Info[F[_], -A] extends Metric[A] { self =>
def info(labels: A): F[Unit]
override def contramap[B](f: B => A): Info[F, B] = new Info[F, B] {
override def info(labels: B): F[Unit] = self.info(f(labels))
}
final def mapK[G[_]](fk: F ~> G): Info[G, A] = new Info[G, A] {
override def info(labels: A): G[Unit] = fk(self.info(labels))
}
}
object Info {
/** Refined value class for a info name that has been parsed from a string
*/
final class Name private (val value: String) extends AnyVal with internal.Refined.Value[String] {
override def toString: String = s"""Info.Name("$value")"""
}
object Name extends internal.Refined.StringRegexRefinement[Name] with internal.InfoNameFromStringLiteral {
override protected val regex: Pattern = "^[a-zA-Z_:][a-zA-Z0-9_:]*_info$".r.pattern
override protected def make(a: String): Name = new Name(a)
}
implicit def catsInstances[F[_]]: Contravariant[Info[F, *]] = new Contravariant[Info[F, *]] {
override def contramap[A, B](fa: Info[F, A])(f: B => A): Info[F, B] = fa.contramap(f)
}
implicit class InfoMapSyntax[F[_]](info: Info[F, Map[Label.Name, String]]) {
def info(labels: (Label.Name, String)*): F[Unit] = info.info(labels.toMap)
}
def make[F[_], A](_info: A => F[Unit]): Info[F, A] = new Info[F, A] {
override def info(labels: A): F[Unit] = _info(labels)
}
def noop[F[_]: Applicative, A]: Info[F, A] = new Info[F, A] {
override def info(labels: A): F[Unit] = Applicative[F].unit
}
}