Superstitious parent mode

gistfile1.scala

import java.util.concurrent._

/**
 * A thread pool for superstitious parent threads who
 * know they shouldn't let their child threads back in the pool after
 * eating, without waiting at least `crampFactor` milliseconds.
 */
object Superstitious {
  def pool(crampFactor: Long) = new ThreadPoolExecutor(
    0, Int.MaxValue, 60L, TimeUnit.SECONDS, new SynchronousQueue[Runnable]) {
      override def afterExecute(r: Runnable, e: Throwable) = {
        Thread.sleep(crampFactor)
        super.afterExecute(r, e)
      }
    }
}