package com.example.http4s.blaze

import cats.effect._
import com.codahale.metrics.{Timer => _, _}
import com.example.http4s.ExampleService
import org.http4s.HttpRoutes
import org.http4s.metrics.dropwizard._
import org.http4s.server.{HttpMiddleware, Router}
import org.http4s.server.blaze.BlazeBuilder
import org.http4s.server.middleware.Metrics

class BlazeMetricsExample(implicit timer: Timer[IO], ctx: ContextShift[IO])
    extends BlazeMetricsExampleApp[IO]
    with IOApp {
  override def run(args: List[String]): IO[ExitCode] =
    stream.compile.toList.map(_.head)
}

class BlazeMetricsExampleApp[F[_]: ConcurrentEffect: ContextShift: Timer] {
  val metricsRegistry: MetricRegistry = new MetricRegistry()
  val metrics: HttpMiddleware[F] = Metrics[F](Dropwizard(metricsRegistry, "server"))

  def service: HttpRoutes[F] =
    Router(
      "" -> metrics(new ExampleService[F].routes),
      "/metrics" -> metricsService[F](metricsRegistry)
    )

  def stream: fs2.Stream[F, ExitCode] =
    BlazeBuilder[F]
      .bindHttp(8080)
      .mountService(service, "/http4s")
      .serve
}

package com.example.http4s.blaze

import cats.effect._
import com.codahale.metrics.{Timer => _, _}
import com.example.http4s.ExampleService
import org.http4s.HttpRoutes
import org.http4s.server.{HttpMiddleware, Router}
import org.http4s.server.blaze.BlazeBuilder
import org.http4s.server.metrics._

class BlazeMetricsExample(implicit timer: Timer[IO], ctx: ContextShift[IO])
    extends BlazeMetricsExampleApp[IO]
    with IOApp {
  override def run(args: List[String]): IO[ExitCode] =
    stream.compile.toList.map(_.head)
}

class BlazeMetricsExampleApp[F[_]: ConcurrentEffect: ContextShift: Timer] {
  val metricsRegistry: MetricRegistry = new MetricRegistry()
  val metrics: HttpMiddleware[F] = Metrics[F](metricsRegistry)

  def service: HttpRoutes[F] =
    Router(
      "" -> metrics(new ExampleService[F].routes),
      "/metrics" -> metricsService[F](metricsRegistry)
    )

  def stream: fs2.Stream[F, ExitCode] =
    BlazeBuilder[F]
      .bindHttp(8080)
      .mountService(service, "/http4s")
      .serve
}

--- 
+++ 
@@ -4,9 +4,10 @@
 import com.codahale.metrics.{Timer => _, _}
 import com.example.http4s.ExampleService
 import org.http4s.HttpRoutes
+import org.http4s.metrics.dropwizard._
 import org.http4s.server.{HttpMiddleware, Router}
 import org.http4s.server.blaze.BlazeBuilder
-import org.http4s.server.metrics._
+import org.http4s.server.middleware.Metrics
 
 class BlazeMetricsExample(implicit timer: Timer[IO], ctx: ContextShift[IO])
     extends BlazeMetricsExampleApp[IO]
@@ -17,7 +18,7 @@
 
 class BlazeMetricsExampleApp[F[_]: ConcurrentEffect: ContextShift: Timer] {
   val metricsRegistry: MetricRegistry = new MetricRegistry()
-  val metrics: HttpMiddleware[F] = Metrics[F](metricsRegistry)
+  val metrics: HttpMiddleware[F] = Metrics[F](Dropwizard(metricsRegistry, "server"))
 
   def service: HttpRoutes[F] =
     Router(
Consolidate dropwizard client and server metrics in one project
