I have created custom errors in my app:
sealed trait DataError extends Product with Serializable
final case class DataNotFound(ex: String) extends DataError
final case class DataStorageError(ex: String) extends DataError
And I have created simple decoder for json responses:
DataNotFound(code, message) => HttpResponse(StatusCodes.NotFound, entity = HttpEntity(ContentTypes.`application/json`, s"""{"code":"$code", "message":"No data found: $message"}"""))
DataStorageError(message) => HttpResponse(StatusCodes.InternalServerError, entity = HttpEntity(ContentTypes.`application/json`, s"$message"))
But as you see, this is a poor solution in my opinion. I would like to use json4s formats to parse error messages into jsons automatically, instead of writing manual strings.
I tried to do something like:
implicit val format = jsonFormat2(DataNotFound)
But it did not work in this case.
What is the best way to do it to get same results? Is it possible or maybe my solution is fine?
