Call with Retry

  val random = new Random();
  def serviceWithBadConnection(): String = {
    if (random.nextFloat() < 0.8) throw new RuntimeException;
    "Data"
  }

  def call[T](retries: Int)(block: => T): Option[T] = {
    if (retries == 0) None 
    else {
      try {
        Some(block);
      } catch {
        case _ => {
          println("Retrying!");
          call(retries - 1)(block);
        }
      }
    }
  }
  
  val result = call(retries = 10) {
    val data = serviceWithBadConnection();
    "Enhanced " + data;
  }
  println(result);