preparing message bus

bus/src/main/java/de/srsoftware/umbrella/messagebus/Event.java

@@ -1,4 +1,23 @@
 package de.srsoftware.umbrella.messagebus;
 
+import de.srsoftware.umbrella.core.model.UmbrellaUser;
+
 public class Event {
+	public enum Type{
+		CREATE,
+		UPDATE,
+		DELETE
+	}
+
+	private UmbrellaUser initiator;
+	private String realm;
+	private Object payload;
+	private Type type;
+
+	public Event(UmbrellaUser initiator, String realm, Object payload, Type type){
+		this.initiator = initiator;
+		this.realm     = realm;
+		this.payload   = payload;
+		this.type      = type;
+	}
 }

bus/src/main/java/de/srsoftware/umbrella/messagebus/EventListener.java

@@ -1,5 +1,5 @@
 package de.srsoftware.umbrella.messagebus;
 
 public interface EventListener {
-	public void onEvent(Event event);
+	void onEvent(Event event);
 }

bus/src/main/java/de/srsoftware/umbrella/messagebus/MessageApi.java

@@ -0,0 +1,17 @@
+package de.srsoftware.umbrella.messagebus;
+
+import com.sun.net.httpserver.HttpExchange;
+import de.srsoftware.tools.Path;
+import de.srsoftware.umbrella.core.BaseHandler;
+
+import java.io.IOException;
+
+public class MessageApi implements EventListener{
+
+	private static final System.Logger LOG = System.getLogger(MessageApi.class.getSimpleName());
+
+	@Override
+	public void onEvent(Event event) {
+		LOG.log(System.Logger.Level.DEBUG,"received {0}",event.getClass().getSimpleName());
+	}
+}

bus/src/main/java/de/srsoftware/umbrella/messagebus/MessageBus.java

@@ -10,7 +10,13 @@ public class MessageBus {
 	private MessageBus(){}
 
 	public void dispatch(Event event){
-		listeners.parallelStream().forEach(l -> l.onEvent(event));
+		new Thread(() -> { // TODO: use thread pool
+			try {
+				Thread.sleep(100);
+				listeners.parallelStream().forEach(l -> l.onEvent(event));
+			} catch (InterruptedException ignored) {
+			}
+		}).start();
 	}
 
 	public void drop(EventListener listener){

bus/src/main/java/de/srsoftware/umbrella/messagebus/TaskEvent.java

@@ -0,0 +1,11 @@
+package de.srsoftware.umbrella.messagebus;
+
+import de.srsoftware.umbrella.core.model.UmbrellaUser;
+
+import static de.srsoftware.umbrella.core.Constants.TASK;
+
+public class TaskEvent extends Event{
+	public TaskEvent(UmbrellaUser initiator,Object payload, Type type){
+		super(initiator,TASK,payload, type);
+	}
+}