Meters4s

Meters4s is a thin, functional wrapper around Micrometer designed to integrate with the Cats ecosystem. This allows for in-process metrics aggregation for counters, timers, gauges and distributions.

Install

Add the following depdency to your build.sbt:

libraryDependencies += "com.ovoenergy" %% "meters4s" % "1.0.0"

Or for Cats Effect 2.x use the 0.4.x series.

You will likely also want to add the module corresponding to whichever monitoring system you want to report metrics to. All systems supported by micrometer can be used by brining in the corresponding micormeter dependecy and then using Reporter.fromRegistry to construct a reporter.

For developer convience we also provide a couple of modules for particular monitoring systems, specifically Datadog and StatsD to provide and ergonomic means for creating reporters for these registries. These can be added to your poject as follows:

libraryDependencies += "com.ovoenergy" %% "meters4s-datadog" % "1.0.0"

or

libraryDependencies += "com.ovoenergy" %% "meters4s-statsd" % "1.0.0"

Usage

For comprehensive API documentation check the scaladoc.

A simple usage example for incrementing a counter, backed by a Micrometer SimpleMeterRegistry:

import com.ovoenergy.meters4s.{Reporter, MetricsConfig}
import cats.effect.IO

val config = MetricsConfig()
for {
    reporter <- Reporter.createSimple[IO](config)
    counter  <- reporter.counter("my.counter")
    _        <- counter.increment
} yield ()

With Datadog

import com.ovoenergy.meters4s.{MetricsConfig, Reporter}
import com.ovoenergy.meters4s.datadog.{DataDog, DataDogConfig}
import cats.effect.IO

val datadog = DataDog.createReporter[IO](DataDogConfig(apiKey = "1234"), MetricsConfig())
datadog.use { reporter =>
    reporter.counter("my.counter").flatMap { counter =>
        counter.increment
    }
}

Inspiration

This library was heavily inspired by (and in some places copied wholesale from) http4s-micrometer-metrics.