[writing-async-app-in-scala-part-3] blocking dao 2

BlockingDao2.scala

class RobustDao(jdbcTemplate: JdbcTemplate,
                blockingEc: ExecutionContext,
                applicationEc: ExecutionContext) {
  def get(id: String): Future[Option[RichDomainObject]] = {
    Future(getBlocking(id))(blockingEc)
      .map(blob => blob.map(parseJson))(applicationEc)
  }

  private def getBlocking(id: String): Option[String] =
    jdbcTemplate.queryForObject(
      "SELECT blob FROM table WHERE id = ?",
      Array(id),
      rs => rs.getString(1) // no parsing, just simple data extraction
    )

  private def parseJson(s: String): RichDomainObject = ???
}