Real random generator

RealRandom.scala

import java.io.IOException
import scala.io.Source
import scala.util.Random

case class RealRandom(val limit: Int) extends Iterator[Int]:

  private val cacheSize = 128
  private val url = s"https://www.random.org/integers/?num=$cacheSize&min=0&max=${limit-1}&col=1&base=10&format=plain&rnd=new"
  private var generator = Iterator[Int]()
  private lazy val failsafe = new Random(System.currentTimeMillis)

  def next: Int =
    if  !generator.hasNext
    then
      try
        generator = Source.fromURL(url).getLines map {_.toInt}
      catch
        case _: IOException ⇒ generator = fallback
    generator.next
  
  def hasNext: Boolean = true
  
  private def fallback: Iterator[Int] =
    (for (_ <- 1 until cacheSize) yield (failsafe.nextDouble * limit).toInt).iterator

Example:

for (i <- RealRandom(100) take 5) System.out println i.toString