Structured logging using akka, slf4j, Logstash Logback Json Encoder

AkkaStructuredLogging.scala

// Snippet
import akka.event.LogMarker
import akka.event.slf4j.Slf4jLogMarker
import net.logstash.logback.marker.RawJsonAppendingMarker

import io.circe._
import io.circe.generic.extras._
import io.circe.syntax._

implicit private val config: Configuration = Configuration.default.withSnakeCaseMemberNames // ELK has good support for snake case json convention

implicit def asMarker[T: Encoder](pair: (String, T)): Marker = {
  val (field, entity) = pair
  val json = entity.asJson.pretty(Printer.noSpaces)
  new RawJsonAppendingMarker(field, json)
}

type Marker = org.slf4j.Marker

def m(head: Marker, tail: Marker*): LogMarker = {
  tail.foreach(v => head.add(v))
  new Slf4jLogMarker(head)
}

// Example of usage
import org.joda.time.DateTime

case class ExampleModel(playerId: String, date: DateTime)

val system: ActorSystem = ActorSystem()

val logger: MarkerLoggingAdapter = Logging.withMarker(system, "application")

val model = ExampleModel("some-player-id-1", DateTime.now())
val model2 = ExampleModel("some-player-id-2", DateTime.now())

logger.info(m("player_1" -> model2, "player_2" -> model), "some random data in your pile")

Great, thanks! Found out your gist from google search. Are you using https://github.com/logstash/logstash-logback-encoder for logging backend?