in pekko-sample-sharding-scala/killrweather/src/main/scala/sample/killrweather/JacksonSerializers.scala [28:33]
override def deserialize(p: JsonParser, ctxt: DeserializationContext): WeatherStation.DataType =
p.getText match {
case "d" => WeatherStation.DataType.Dewpoint
case "t" => WeatherStation.DataType.Temperature
case "p" => WeatherStation.DataType.Pressure
}