ToMarkers

This is a type class used to convert given types to Markers.

Markers are very useful for structured logging, because they can be converted into key/value pairs without altering the structure of a message or keeping the ordering in arguments (especially since an exception must be at the end of the tail).

The API does not define type class instances in this layer, but the logstash package provides many useful mappings to Markers.

case class Person(name: String, age: Int)
implicit val personToMarkers: ToMarkers[Person] = ToMarkers { person =>
  val personObj = bobj("name" -> person.name)
  Markers(personObj)
}