better network structure

app/src/main/java/network/protocol/PacketDispatcher.java

@@ -0,0 +1,28 @@
+package network.protocol;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PacketDispatcher {
+
+	private final List<PacketVisitor> handlers;
+
+	public PacketDispatcher() {
+		this.handlers = new ArrayList<>();
+	}
+
+	public void dispatch(Packet packet) {
+		for (PacketVisitor handler : handlers) {
+			handler.visitPacket(packet);
+		}
+	}
+
+	public void registerHandler(PacketVisitor handler) {
+		handlers.add(handler);
+	}
+
+	public void unregisterHandler(PacketVisitor handler) {
+		handlers.remove(handler);
+	}
+
+}