Add untyped transactor

akka-stm/src/test/java/akka/stm/example/TransactionalMapExample.java

@@ -0,0 +1,34 @@
+package akka.stm.example;
+
+import akka.stm.*;
+
+public class TransactionalMapExample {
+    public static void main(String[] args) {
+        System.out.println();
+        System.out.println("TransactionalMap example");
+        System.out.println();
+
+        final TransactionalMap<String, User> users = new TransactionalMap<String, User>();
+
+        // fill users map (in a transaction)
+        new Atomic() {
+            public Object atomically() {
+                users.put("bill", new User("bill"));
+                users.put("mary", new User("mary"));
+                users.put("john", new User("john"));
+                return null;
+            }
+        }.execute();
+
+        System.out.println("users: " + users);
+
+        // access users map (in a transaction)
+        User user = new Atomic<User>() {
+            public User atomically() {
+                return users.get("bill").get();
+            }
+        }.execute();
+
+        System.out.println("user: " + user);
+    }
+}