--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/4-Scala/sizer/src/main/scala/example/sizer.scala	Sat Oct 14 13:39:41 2017 +0100
@@ -0,0 +1,64 @@
+package example
+
+import scala.io._
+import akka.actor.{Actor,ActorSystem,Props}
+
+object PageLoader {
+    def getPageSize(url : String) : Int = {
+        try {
+            return Source.fromURL(url).mkString.length
+        } catch {
+            case e:Exception =>
+                return -1
+        }
+    }
+}
+
+class ConcurrentActor extends Actor {
+    def receive = {
+        case (url, size) => println("Size for " + url + ": " + size)
+    }
+}
+
+object Main {
+    val urls = List(
+        "https://www.amazon.com/",
+        "https://twitter.com/",
+        "https://www.google.co.uk/",
+        "https://www.bbc.co.uk/news/"
+    )
+
+    val system = ActorSystem("MySystem")
+    val actor = system.actorOf(Props[ConcurrentActor], name="concurrent-actor")
+
+    def timeMethod(method: () => Unit) = {
+        val start = System.nanoTime
+        method()
+        val end = System.nanoTime
+        println("+++ Method took " + (end - start) / 1000000000.0 + " seconds.")
+    }
+
+    def getPageSizeSequentially() = {
+        for (url <- urls) {
+            println("Size for " + url +": " + PageLoader.getPageSize(url))
+        }
+    }
+
+    def getPageSizeConcurrently() = {
+        for (url <- urls) {
+            // Send a message to the actor (which won't arrive until the PageLoader call completes)
+            println(s"Sending message for $url")
+            actor ! (url, PageLoader.getPageSize(url))
+        }
+    }
+
+    def main(args: Array[String]) {
+        println("Sequential:")
+        timeMethod { getPageSizeSequentially }
+
+        println("Concurrent:")
+        timeMethod { getPageSizeConcurrently }
+        system.stop(actor)
+        system.terminate()
+    }
+}
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