Merge pull request #1160 from avast/http4s-prometheus-conflict

Http4s prometheus conflict

build.sbt

@@ -513,7 +513,12 @@ lazy val micrometerPrometheus = project
   .settings(BuildSettings.common)
   .settings(
     name := "sst-micrometer-prometheus",
-    libraryDependencies += Dependencies.micrometerPrometheus
+    libraryDependencies ++= Seq(
+      Dependencies.micrometerPrometheus,
+      Dependencies.monixEval % Test,
+      Dependencies.monixExecution % Test,
+      Dependencies.http4sPrometheus % Test
+    )
   )
 
 lazy val micrometerPrometheusPureConfig = project

micrometer-prometheus/src/main/scala/com/avast/sst/micrometer/prometheus/MicrometerPrometheusConfig.scala

@@ -1,11 +1,14 @@
 package com.avast.sst.micrometer.prometheus
 
+import io.micrometer.prometheus.HistogramFlavor
+
 import java.util.concurrent.TimeUnit
 import scala.concurrent.duration.Duration
 
 final case class MicrometerPrometheusConfig(
     step: Duration = Duration(1, TimeUnit.MINUTES),
     prefix: String = "",
     descriptions: Boolean = true,
+    histogramFlavor: HistogramFlavor = HistogramFlavor.Prometheus,
     commonTags: Map[String, String] = Map.empty
 )

micrometer-prometheus/src/main/scala/com/avast/sst/micrometer/prometheus/MicrometerPrometheusModule.scala

@@ -3,7 +3,7 @@ package com.avast.sst.micrometer.prometheus
 import cats.effect.{Blocker, ContextShift, Resource, Sync}
 import com.avast.sst.micrometer.PrefixMeterFilter
 import io.micrometer.core.instrument.config.{MeterFilter, NamingConvention}
-import io.micrometer.prometheusmetrics.{PrometheusConfig, PrometheusMeterRegistry}
+import io.micrometer.prometheus.{HistogramFlavor, PrometheusConfig, PrometheusMeterRegistry}
 
 import java.time.Duration
 
@@ -44,6 +44,7 @@ object MicrometerPrometheusModule {
     override val step: Duration = java.time.Duration.ofMillis(c.step.toMillis)
     override val prefix: String = c.prefix
     override val descriptions: Boolean = c.descriptions
+    override val histogramFlavor: HistogramFlavor = c.histogramFlavor
 
     // the method is @Nullable and we don't need to implement it here
     @SuppressWarnings(Array("scalafix:DisableSyntax.null"))

micrometer-prometheus/src/test/scala/com/avast/sst/micrometer/prometheus/Http4sPrometheusCompatibilityTest.scala

@@ -0,0 +1,39 @@
+package com.avast.sst.micrometer.prometheus
+
+import cats.effect.*
+import monix.eval.Task
+import monix.eval.instances.CatsConcurrentEffectForTask
+import monix.execution.Scheduler
+import org.http4s.metrics.prometheus.PrometheusExportService
+import org.scalatest.funsuite.AnyFunSuite
+
+import java.util.concurrent.{SynchronousQueue, ThreadPoolExecutor, TimeUnit}
+import scala.concurrent.ExecutionContext
+
+class Http4sPrometheusCompatibilityTest extends AnyFunSuite {
+
+  implicit def scheduler: Scheduler = Scheduler.global
+
+  protected def options: Task.Options = Task.defaultOptions.withSchedulerFeatures(scheduler)
+
+  protected implicit lazy val catsEffect: ConcurrentEffect[Task] =
+    new CatsConcurrentEffectForTask()(scheduler, options)
+
+  test("Http4s Prometheus compatibility test") {
+
+    val config = MicrometerPrometheusConfig()
+
+    val blockingExecutor = new ThreadPoolExecutor(1, 1, 10, TimeUnit.SECONDS, new SynchronousQueue())
+    val blocker = Blocker.liftExecutionContext(ExecutionContext.fromExecutor(blockingExecutor))
+
+    val test = for {
+
+      prometheusMeterRegistry <- MicrometerPrometheusModule.make(config, blocker)
+      _ = PrometheusExportService(prometheusMeterRegistry.getPrometheusRegistry)
+      _ <- PrometheusExportService.addDefaults(prometheusMeterRegistry.getPrometheusRegistry)
+    } yield ()
+
+    test.use(_ => Task.unit).runSyncUnsafe()
+
+  }
+}

project/Dependencies.scala

@@ -17,6 +17,7 @@ object Dependencies {
   val http4sEmberServer = "org.http4s" %% "http4s-ember-server" % Versions.http4s
   val http4sClient = "org.http4s" %% "http4s-client" % Versions.http4s
   val http4sDsl = "org.http4s" %% "http4s-dsl" % Versions.http4s
+  val http4sPrometheus = "org.http4s" %% "http4s-prometheus-metrics" % Versions.http4s
   val http4sServer = "org.http4s" %% "http4s-server" % Versions.http4s
   val jacksonDatabind = "com.fasterxml.jackson.core" % "jackson-databind" % "2.17.1"
   val jetbrainsAnnotations = "org.jetbrains" % "annotations" % "24.1.0"
@@ -30,6 +31,7 @@ object Dependencies {
   val micrometerPrometheus = "io.micrometer" % "micrometer-registry-prometheus" % Versions.micrometerPrometheus
   val monixCatnap = "io.monix" %% "monix-catnap" % Versions.monix
   val monixEval = "io.monix" %% "monix-eval" % Versions.monix
+  val monixExecution = "io.monix" %% "monix-execution" % Versions.monix
   val postgresql = "org.postgresql" % "postgresql" % "42.7.3"
   val pureConfigCore = "com.github.pureconfig" %% "pureconfig-core" % Versions.pureConfig
   val pureConfigGeneric = "com.github.pureconfig" %% "pureconfig-generic" % Versions.pureConfig
@@ -51,10 +53,10 @@ object Dependencies {
     val doobie = "0.13.4"
     val grpc = "1.64.0"
     val http4s = "0.22.15"
-    val micrometerCore = "1.13.1"
-    val micrometerJmx = "1.13.1"
-    val micrometerStatsD = "1.13.1"
-    val micrometerPrometheus = "1.13.1"
+    val micrometerCore = "1.12.7"
+    val micrometerJmx = "1.12.7"
+    val micrometerStatsD = "1.12.7"
+    val micrometerPrometheus = "1.12.7"
     val monix = "3.4.1"
     val pureConfig = "0.17.1"