retrying.scala

trait Retrying[T] extends Repository[T] {
  abstract override def withConnection(f: (Connection => Option[T])): Option[T] = retry(f)

  private def retry(f: (Connection => Option[T]), times: Int = 3): Option[T] = {
    try {
      println("number of tries left: %d".format(times))
      super.withConnection(f)
    } catch {
      case _ if times == 0 => None
      case _ => retry(f, times - 1)
    }
  }
}