Data commit

Task/Rate-counter/Scala/rate-counter-1.scala

@@ -0,0 +1,11 @@
+def task(n: Int) = Thread.sleep(n * 1000)
+def rate(fs: List[() => Unit]) = {
+  val jobs = fs map (f => scala.actors.Futures.future(f()))
+  val cnt1 = scala.actors.Futures.awaitAll(5000, jobs: _*).count(_ != None)
+  val cnt2 = scala.actors.Futures.awaitAll(5000, jobs: _*).count(_ != None)
+  val cnt3 = scala.actors.Futures.awaitAll(5000, jobs: _*).count(_ != None)
+  println("%d jobs in 5 seconds" format cnt1)
+  println("%d jobs in 10 seconds" format cnt2)
+  println("%d jobs in 15 seconds" format cnt3)
+}
+rate(List.fill(30)(() => task(scala.util.Random.nextInt(10)+1)))

Task/Rate-counter/Scala/rate-counter-2.scala

@@ -0,0 +1,15 @@
+def rate(n: Int, y: Int)(task: => Unit) {
+  val startTime = System.currentTimeMillis
+  var currTime = startTime
+  var loops = 0
+  do {
+    task
+    currTime = System.currentTimeMillis
+    loops += 1
+  } while (currTime - startTime < n * 1000 && loops < y)
+  if (currTime - startTime > n * 1000)
+    println("Rate %d times per %d seconds" format (loops - 1, n))
+  else
+    println("Rate %d times in %.3f seconds" format (y, (currTime - startTime).toDouble / 1000))
+}
+rate(5, 20)(task(2))