metrics-json

Expose Dropwizard metrics in json

Compatible with scala 2.11 and scala 2.12, with play-json and circe.

Installation

Select metrics-json version

Circe

Circe version	metrics-circe version
0.8.0	0.1
0.9.A	0.3
0.12.3	1.0
0.13.0	1.1

Play-json

Play json version	metrics-playjson version
2.6.2	0.1
2.6.7	0.3
2.7.4	1.1
2.8.1	1.2.1

Add Dependency

resolvers += "Tabmo MyGet Public" at "https://www.myget.org/F/tabmo-public/maven/"

// For Circe
libraryDependencies += "io.tabmo" %% "metrics-circe" % metricsCirceVersion

// For Play-json
libraryDependencies += "io.tabmo" %% "metrics-playjson" % metricsPlayjsonVersion

Usage

Circe (eg with Play 2.6)

Required dependency: play-circe

libraryDependencies += "play-circe" %% "play-circe" % s"2.6-$playCirceVersion"

package play.api.libs.circe

import io.circe.generic.auto._
import io.circe.syntax._
import play.api._
import play.api.mvc._
import nl.grons.metrics.scala.DefaultInstrumented

class MetricController(val controllerComponents: ControllerComponents) extends BaseController with DefaultInstrumented with Circe {

  import io.circe.syntax._
  import io.tabmo.metrics.circe._

  def get = Action {
    Metrics.callToApiCounter.inc()
    Ok()
  }

  //expose all metrics to our json api
  def exposeMetrics = Action {
    Ok(Metrics.asJson)
  }
}

object Metrics extends DefaultInstrumented {
  val callToApiCounter = metrics.counter("callToApiCounter")
}

Play-json (eg with Play 2.6)

package play.api.libs.circe

import io.circe.generic.auto._
import io.circe.syntax._
import play.api._
import play.api.mvc._
import nl.grons.metrics.scala.DefaultInstrumented

class MetricController(val controllerComponents: ControllerComponents) extends BaseController with DefaultInstrumented {

  import play.api.libs.json.Writes
  import io.tabmo.metrics.playjson._

  def get = Action {
    Metrics.callToApiCounter.inc()
    Ok()
  }

  //expose all metrics to our json api
  def exposeMetrics = Action {
    Ok(Writes.of[DefaultInstrumented].writes(Metrics))
  }
}

object Metrics extends DefaultInstrumented {
  val callToApiCounter = metrics.counter("callToApiCounter")
}