A basic infinite retry implementation. More extreme versions: (1) https://gist.github.com/Mortimerp9/5430595, (2) https://github.com/softprops/retry and (3) http://stackoverflow.com/questions/7930814/whats-the-scala-way-to-implement-a-retry-able-call-like-this-one

## AppThatUsesRetry.scala
import scala.concurrent.duration._

object AppThatUsesRetry extends App {
  Retry(backoff = 30 seconds) {
    throw new Exception("fail every 30 seconds")
  }
}

## Retry.scala
import scala.util.{Failure, Success, Try}
import scala.concurrent.duration._

object Retry {
  @annotation.tailrec
  def apply[A](backoff: Duration = 5 seconds)(f: => A): A = {
    Try(f) match {
      case Success(x) => x
      case Failure(e) =>
        Thread.sleep(backoff.toMillis)
        Retry(backoff) {
          f
        }
    }
  }
}