fixed TX Vector and TX Ref plus added tests + rewrote Reactor impl + added custom Actor impl(currently not used though)

kernel/src/main/scala/reactor/MessageDispatcherBase.scala

@@ -0,0 +1,35 @@
+/**
+ * Copyright (C) 2009 Scalable Solutions.
+ */
+
+package se.scalablesolutions.akka.kernel.reactor
+
+import java.util.concurrent.{ConcurrentMap, ConcurrentHashMap}
+
+trait MessageDispatcherBase extends MessageDispatcher {
+  val messageQueue = new MessageQueue
+
+  protected val messageHandlers = new ConcurrentHashMap[AnyRef, MessageHandler]
+  protected var selectorThread: Thread = _
+  @volatile protected var active: Boolean = false
+  protected val guard = new Object
+
+  def registerHandler(key: AnyRef, handler: MessageHandler) = guard.synchronized {
+    messageHandlers.put(key, handler)
+  }
+
+  def unregisterHandler(key: AnyRef) = guard.synchronized {
+    messageHandlers.remove(key)
+  }
+
+  def shutdown = if (active) {
+    active = false
+    selectorThread.interrupt
+    doShutdown
+  }
+
+  /**
+   * Subclass callback. Override if additional shutdown behavior is needed.
+   */
+  protected def doShutdown = {}
+}