Verify socket with scala

IsUp.scala

object IsUp {

  class RetryException(msg: String, exception: Throwable) extends Exception(msg, exception)

  def socket(host: String, port: Int, nb: Int = 10, time: Long = 1000): Unit = {
    retry(nb, time) {
      val socket = new Socket()
      try {
        socket.connect(new InetSocketAddress(host, port));
      } finally {
        socket.close()
      }
    }
  }

  import scala.util.Try
  import scala.util.Success

  def retry[T](nb: Int = 1, time: Long = 0)(fn: ⇒ T): Try[T] = {
    Try {
      fn
    } match {
      case x: Success[T] ⇒ x
      case _ if nb > 1 ⇒ {
        Thread.sleep(time)
        retry(nb - 1, time)(fn)
      }
      case fail ⇒ throw new RetryException(s"retry fails '$nb' '$time'", fail.failed.get)
    }
  }

}