Visualiser ConnectionController:

Clicking the host button doesn't create more than one server.

racevisionGame/src/main/java/visualiser/Controllers/ConnectionController.java

@@ -43,6 +43,13 @@ public class ConnectionController extends Controller {
 
     private ObservableList<RaceConnection> connections;
 
+
+    /**
+     * Represents whether the client is currently hosting a game already - this is to ensure they don't launch multiple servers.
+     */
+    private boolean currentlyHostingGame = false;
+
+
     @Override
     public void initialize(URL location, ResourceBundle resources) {
         // TODO - replace with config file
@@ -104,12 +111,17 @@ public class ConnectionController extends Controller {
      */
     public void addLocal() {
         try {
+            //We don't want to host more than one game.
+            if (!currentlyHostingGame) {
                 Event game = Event.getEvent();
                 urlField.textProperty().set(game.getAddress());
                 portField.textProperty().set(Integer.toString(game.getPort()));
 
                 game.start();
                 addConnection();
+
+                currentlyHostingGame = true;
+            }
         } catch (InvalidRaceDataException e) {
             e.printStackTrace();
         } catch (XMLReaderException e) {