Added messagebus stuff to util

Dorkbox-Util/src/dorkbox/util/Message.java

@@ -0,0 +1,7 @@
+package dorkbox.util;
+
+import java.io.Serializable;
+
+public interface Message extends Serializable {
+
+}

Dorkbox-Util/src/dorkbox/util/MessageBus.java

@@ -0,0 +1,37 @@
+package dorkbox.util;
+
+import net.engio.mbassy.IMessageBus;
+import net.engio.mbassy.MBassador;
+import net.engio.mbassy.error.IPublicationErrorHandler;
+import net.engio.mbassy.error.PublicationError;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import dorkbox.util.OS;
+
+public class MessageBus {
+
+    public static final IMessageBus bus;
+    private static final Logger logger = LoggerFactory.getLogger(MessageBus.class);
+
+
+    static {
+        MBassador mBassador = new MBassador(OS.getOptimumNumberOfThreads()*2);
+
+        IPublicationErrorHandler ExceptionCounter = new IPublicationErrorHandler() {
+            @Override
+            public void handleError(PublicationError error) {
+                logger.error(error.toString());
+            }
+        };
+
+        mBassador.addErrorHandler(ExceptionCounter);
+        mBassador.start();
+
+        bus = mBassador;
+    }
+
+    private MessageBus() {
+    }
+}