added the option to host the server on a client

Projekte/battleship/client/src/main/java/pp/battleship/client/Menu.java

@@ -44,6 +44,7 @@ class Menu extends Dialog {
     public Menu(BattleshipApp app) {
         super(app.getDialogManager());
         this.app = app;
+
         addChild(new Label(lookup("battleship.name"), new ElementId("header")));//NON-NLS
 
         addChild(new Checkbox(lookup("menu.sound-enabled"), new StateCheckboxModel(app, GameSound.class)));

Projekte/battleship/client/src/main/java/pp/battleship/client/NetworkDialog.java

@@ -7,10 +7,12 @@
 
 package pp.battleship.client;
 
+import com.simsilica.lemur.Checkbox;
 import com.simsilica.lemur.Container;
 import com.simsilica.lemur.Label;
 import com.simsilica.lemur.TextField;
 import com.simsilica.lemur.component.SpringGridLayout;
+import pp.battleship.client.server.BattleshipSelfhostServer;
 import pp.dialog.Dialog;
 import pp.dialog.DialogBuilder;
 import pp.dialog.SimpleDialog;
@@ -33,6 +35,7 @@ class NetworkDialog extends SimpleDialog {
     private final NetworkSupport network;
     private final TextField host = new TextField(LOCALHOST);
     private final TextField port = new TextField(DEFAULT_PORT);
+    private static final Checkbox HOST  = new Checkbox(lookup("server.host"));
     private String hostname;
     private int portNumber;
     private Future<Object> connectionFuture;
@@ -56,6 +59,7 @@ class NetworkDialog extends SimpleDialog {
         input.addChild(host, 1);
         input.addChild(new Label(lookup("port.number") + ":  "));
         input.addChild(port, 1);
+        input.addChild(HOST).addClickCommands(s -> ifTopDialog(this::startClientServer));
 
         DialogBuilder.simple(app.getDialogManager())
                      .setTitle(lookup("server.dialog"))
@@ -150,4 +154,22 @@ class NetworkDialog extends SimpleDialog {
         network.getApp().errorDialog(lookup("server.connection.failed"));
         network.getApp().setInfoText(e.getLocalizedMessage());
     }
+
+    /**
+     * Starts the server of the client in a new thread and catches connectivity issues.
+     */
+    private void startClientServer() {
+        HOST.setEnabled(false);
+        Thread serverThread = new Thread(() -> {
+            try {
+                BattleshipSelfhostServer.main(null);
+            } catch (Exception e) {
+                HOST.setEnabled(true);
+                LOGGER.log(Level.ERROR, "Server could not be started", e);
+                network.getApp().errorDialog("Could not start server: " + e.getMessage());
             }
+        });
+        serverThread.start();
+    }
+}
+

Projekte/battleship/client/src/main/java/pp/battleship/client/server/BattleshipSelfhostServer.java

@@ -0,0 +1,179 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.server;
+
+import com.jme3.network.ConnectionListener;
+import com.jme3.network.HostedConnection;
+import com.jme3.network.Message;
+import com.jme3.network.MessageListener;
+import com.jme3.network.Network;
+import com.jme3.network.Server;
+import com.jme3.network.serializing.Serializer;
+import pp.battleship.BattleshipConfig;
+import pp.battleship.game.server.Player;
+import pp.battleship.game.server.ServerGameLogic;
+import pp.battleship.game.server.ServerSender;
+import pp.battleship.message.client.ClientMessage;
+import pp.battleship.message.client.MapMessage;
+import pp.battleship.message.client.ShootMessage;
+import pp.battleship.message.server.EffectMessage;
+import pp.battleship.message.server.GameDetails;
+import pp.battleship.message.server.ServerMessage;
+import pp.battleship.message.server.StartBattleMessage;
+import pp.battleship.model.Battleship;
+import pp.battleship.model.IntPoint;
+import pp.battleship.model.Shot;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.logging.LogManager;
+
+/**
+ * Server implementing the visitor pattern as MessageReceiver for ClientMessages
+ */
+public class BattleshipSelfhostServer implements MessageListener<HostedConnection>, ConnectionListener, ServerSender {
+    private static final Logger LOGGER = System.getLogger(BattleshipSelfhostServer.class.getName());
+    private static final File CONFIG_FILE = new File("server.properties");
+
+    private final BattleshipConfig config = new BattleshipConfig();
+    private Server myServer;
+    private final ServerGameLogic logic;
+    private final BlockingQueue<ReceivedMessageSelfhost> pendingMessages = new LinkedBlockingQueue<>();
+
+    static {
+        // Configure logging
+        LogManager manager = LogManager.getLogManager();
+        try {
+            manager.readConfiguration(new FileInputStream("logging.properties"));
+            LOGGER.log(Level.INFO, "Successfully read logging properties"); //NON-NLS
+        }
+        catch (IOException e) {
+            LOGGER.log(Level.INFO, e.getMessage());
+        }
+    }
+
+    /**
+     * Starts the server.
+     */
+    public static void main(String[] args) {
+        new BattleshipSelfhostServer().run();
+    }
+
+    /**
+     * Creates the server.
+     */
+    BattleshipSelfhostServer() {
+        config.readFromIfExists(CONFIG_FILE);
+        LOGGER.log(Level.INFO, "Configuration: {0}", config); //NON-NLS
+        logic = new ServerGameLogic(this, config);
+    }
+
+    public void run() {
+        startServer();
+        while (true)
+            processNextMessage();
+    }
+
+    private void startServer() {
+        try {
+            LOGGER.log(Level.INFO, "Starting server..."); //NON-NLS
+            myServer = Network.createServer(config.getPort());
+            initializeSerializables();
+            myServer.start();
+            registerListeners();
+            LOGGER.log(Level.INFO, "Server started: {0}", myServer.isRunning()); //NON-NLS
+        }
+        catch (IOException e) {
+            LOGGER.log(Level.ERROR, "Couldn't start server: {0}", e.getMessage()); //NON-NLS
+            exit(1);
+        }
+    }
+
+    private void processNextMessage() {
+        try {
+            pendingMessages.take().process(logic);
+        }
+        catch (InterruptedException ex) {
+            LOGGER.log(Level.INFO, "Interrupted while waiting for messages"); //NON-NLS
+            Thread.currentThread().interrupt();
+        }
+    }
+
+    private void initializeSerializables() {
+        Serializer.registerClass(GameDetails.class);
+        Serializer.registerClass(StartBattleMessage.class);
+        Serializer.registerClass(MapMessage.class);
+        Serializer.registerClass(ShootMessage.class);
+        Serializer.registerClass(EffectMessage.class);
+        Serializer.registerClass(Battleship.class);
+        Serializer.registerClass(IntPoint.class);
+        Serializer.registerClass(Shot.class);
+    }
+
+    private void registerListeners() {
+        myServer.addMessageListener(this, MapMessage.class);
+        myServer.addMessageListener(this, ShootMessage.class);
+        myServer.addConnectionListener(this);
+    }
+
+    @Override
+    public void messageReceived(HostedConnection source, Message message) {
+        LOGGER.log(Level.INFO, "message received from {0}: {1}", source.getId(), message); //NON-NLS
+        if (message instanceof ClientMessage clientMessage)
+            pendingMessages.add(new ReceivedMessageSelfhost(clientMessage, source.getId()));
+    }
+
+    @Override
+    public void connectionAdded(Server server, HostedConnection hostedConnection) {
+        LOGGER.log(Level.INFO, "new connection {0}", hostedConnection); //NON-NLS
+        logic.addPlayer(hostedConnection.getId());
+    }
+
+    @Override
+    public void connectionRemoved(Server server, HostedConnection hostedConnection) {
+        LOGGER.log(Level.INFO, "connection closed: {0}", hostedConnection); //NON-NLS
+        final Player player = logic.getPlayerById(hostedConnection.getId());
+        if (player == null)
+            LOGGER.log(Level.INFO, "closed connection does not belong to an active player"); //NON-NLS
+        else { //NON-NLS
+            LOGGER.log(Level.INFO, "closed connection belongs to {0}", player); //NON-NLS
+            exit(0);
+        }
+    }
+
+    private void exit(int exitValue) { //NON-NLS
+        LOGGER.log(Level.INFO, "close request"); //NON-NLS
+        if (myServer != null)
+            for (HostedConnection client : myServer.getConnections()) //NON-NLS
+                if (client != null) client.close("Game over"); //NON-NLS
+        System.exit(exitValue);
+    }
+
+    /**
+     * Send the specified message to the specified connection.
+     *
+     * @param id      the connection id
+     * @param message the message
+     */
+    public void send(int id, ServerMessage message) {
+        if (myServer == null || !myServer.isRunning()) {
+            LOGGER.log(Level.ERROR, "no server running when trying to send {0}", message); //NON-NLS
+            return;
+        }
+        final HostedConnection connection = myServer.getConnection(id);
+        if (connection != null)
+            connection.send(message);
+        else
+            LOGGER.log(Level.ERROR, "there is no connection with id={0}", id); //NON-NLS
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/server/ReceivedMessageSelfhost.java

@@ -0,0 +1,17 @@
+////////////////////////////////////////
+// Programming project code
+// UniBw M, 2022, 2023, 2024
+// www.unibw.de/inf2
+// (c) Mark Minas (mark.minas@unibw.de)
+////////////////////////////////////////
+
+package pp.battleship.client.server;
+
+import pp.battleship.message.client.ClientInterpreter;
+import pp.battleship.message.client.ClientMessage;
+
+record ReceivedMessageSelfhost(ClientMessage message, int from) {
+    void process(ClientInterpreter interpreter) {
+        message.accept(interpreter, from);
+    }
+}

Projekte/battleship/model/src/main/resources/battleship.properties

@@ -25,6 +25,7 @@ button.cancel=Cancel
 server.dialog=Server
 host.name=Host
 port.number=Port
+server.host= Self-Host Game
 wait.its.not.your.turn=Wait, it's not your turn!!
 menu.quit=Quit game
 menu.return-to-game=Return to game

Projekte/battleship/model/src/main/resources/battleship_de.properties

@@ -25,6 +25,7 @@ button.cancel=Abbruch
 server.dialog=Server
 host.name=Host
 port.number=Port
+server.host= Spiel selbst hosten
 wait.its.not.your.turn=Warte, Du bist nicht dran!!
 menu.quit=Spiel beenden
 menu.return-to-game=Zurück zum Spiel