Merge pull request #48 from rubenpirreram/RMI

RMI

src/main/java/it/polimi/ingsw/gc14/Network/RMI/Client/ClientCallbackImpl.java

@@ -8,25 +8,52 @@ import it.polimi.ingsw.gc14.Network.RMI.Common.IClientCallback;
 import java.rmi.RemoteException;
 import java.rmi.server.UnicastRemoteObject;
 
+
+/**
+ * RMI client callback implementation of {@link IClientCallback}.
+ * Receives notifications from the server and updates the client game model.
+ */
 public class ClientCallbackImpl extends UnicastRemoteObject implements IClientCallback {
 
+    /** The client controller used to apply events and update the model */
     private final ClientController clientController;
 
+
+    /**
+     * Class constructor.
+     * @param clientController the client controller
+     * @throws RemoteException if any RMI error occurs
+     */
     public ClientCallbackImpl(ClientController clientController) throws RemoteException {
         this.clientController = clientController;
     }
 
+
+    /**
+     * Called by the server when the game is initialized.
+     * Sets the client game model in the {@link ClientController}.
+     * @param model the initialized {@link Game} model
+     * @throws RemoteException if any RMI error occurs
+     */
     @Override
     public void onGameInit(Game model) throws RemoteException {
-        clientController.setModel(model);   // setta il model
+        clientController.setModel(model);
     }
 
+
+    /**
+     * Called by the server when an action has been accepted.
+     * If the event contains an error, it is printed to the console.
+     * Otherwise, the event is applied to the local model.
+     * @param event the {@link NetworkEvent} sent by the server
+     * @throws RemoteException if any RMI error occurs
+     */
     @Override
     public void onAction(NetworkEvent event) throws RemoteException {
         if(event.getIsError()) {
             System.out.println(event.toString());
         } else {
-            event.apply(clientController.localController);      // delega tutto al controller
+            event.apply(clientController.localController);
             //clientController.view.update();           TODO
         }
     }

src/main/java/it/polimi/ingsw/gc14/Network/RMI/Client/RMIClient.java

@@ -1,43 +1,56 @@
 package it.polimi.ingsw.gc14.Network.RMI.Client;
+import java.rmi.RemoteException;
 import java.rmi.registry.LocateRegistry;
 import java.rmi.registry.Registry;
 
 import it.polimi.ingsw.gc14.Controller.ClientController;
 import it.polimi.ingsw.gc14.Network.NetworkEvent;
+import it.polimi.ingsw.gc14.Network.RMI.Common.IClientCallback;
 import it.polimi.ingsw.gc14.Network.RMI.Common.IGameServer;
+import it.polimi.ingsw.gc14.Network.RMI.Server.RMIServer;
 
+/**
+ * Client RMI. Uses the methods exposed by the server RMI.
+ */
 public class RMIClient {
 
+    /** The host address of the RMI server */
     private final String host;
+
+    /** The port of the RMI server */
     private final int port;
+
+    /** The remote stub used to call methods on the server */
     private IGameServer stub;
 
+
+    /**
+     * Class constructor.
+     * @param host the host address of the RMI server
+     * @param port the port of the RMI server
+     */
     public RMIClient(String host, int port) {
         this.host = host;
         this.port = port;
     }
 
 
+    /**
+     * Connects to the RMI server and attempts to join the game.
+     * Looks up the RMI registry to retrieve the {@link IGameServer} stub.
+     * Then, creates a {@link ClientCallbackImpl} and calls {@link RMIServer#joinGame(String, int, IClientCallback)}.
+     * @param username the player's username
+     * @param preferredInt the desired number of players
+     * @param clientController the client controller used to create the callback
+     * @return true if the player successfully joined the game, false otherwise
+     */
     public boolean connect(String username,int preferredInt, ClientController clientController) {
-        // 1. Connettiti al registry
         try {
             Registry registry = LocateRegistry.getRegistry(host, port);
-
-            // 2. Prendi lo stub del server
             this.stub = (IGameServer) registry.lookup("RMIGameServer");
-
-            // 3. Crea il callback e registralo
             ClientCallbackImpl callback = new ClientCallbackImpl(clientController);
 
-            if (!stub.joinGame(username,preferredInt, callback))
+            return stub.joinGame(username, preferredInt, callback);
-            {
-                stub = null;
-                return false;
-            }
-            else
-            {
-                return true;
-            }
         }
         catch (Exception e) {
             e.printStackTrace();
@@ -46,8 +59,12 @@ public class RMIClient  {
 
     }
 
-
+    /**
-    public void doEvent(NetworkEvent event) throws Exception {
+     * Sends a {@link NetworkEvent} to the server.
+     * @param event the event to send
+     * @throws RemoteException if any RMI error occurs
+     */
+    public void doEvent(NetworkEvent event) throws RemoteException {
         stub.doEvent(event);
     }
 

src/main/java/it/polimi/ingsw/gc14/Network/RMI/Server/RMIServer.java

@@ -15,19 +15,47 @@ import java.util.Map;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ConcurrentHashMap;
 
-
 import java.rmi.*;
 
+
+/**
+ * Server RMI. Exposes a method to join the game and one to execute an event.
+ */
 public class RMIServer implements IGameServer {
 
+    /** Server game's controller */
     private GameController controller;
+
+    /** Server game's model */
+    private Game model;
+
+    /** RMI registry */
     private Registry registry;
+
+    /** RMI port */
     private int nPort;
+
+    /** Map containing the associations between a player's username and its callback */
     private final Map<String, IClientCallback> clients = new ConcurrentHashMap<>();
+
+    /** Queue containing the events to be applied to the game model */
     BlockingQueue<NetworkEvent> actionQueue;
+
+    /**
+     * List containing the usernames of joined players.
+     * {@link LimitedList}'s limit defines at which size the list calls its action. The limit can be set using {@link LimitedList#setLimit(int)}.
+     */
     private LimitedList<String> playerList;
 
-    // Costruttore
+
+    /**
+     * Class constructor that initializes the attributes.
+     * @param controller The game controller
+     * @param nPort The RMI port
+     * @param actionQueue The action queue
+     * @param playerList The player's usernames list
+     * @throws RemoteException if an RMI error occurs
+     */
     public RMIServer(GameController controller, int nPort, BlockingQueue<NetworkEvent> actionQueue,LimitedList<String> playerList) throws RemoteException {
         this.controller = controller;
         this.nPort = nPort;
@@ -37,25 +65,29 @@ public class RMIServer implements IGameServer {
 
 
 
-
+    // RMI's exposed methods
-
+    /**
-
+     * Allows a player to join the game.
-    // Metodi esposti RMI
+     * If the desired number of player is invalid, the request is rejected.
-    public void setController (GameController controller) {
+     * If this is the first player, a new game model is created and passed to the controller. Additionally, the playerList's limit is set.
-        this.controller = controller;
+     * Then, if the controller successfully adds the player, the username is added to {@link #playerList} and {@link #clients}.
-    }
+     * @param username The player's name
+     * @param preferredInt The desired number of players
+     * @param callback The client's callback interface
+     * @return true if the player successfully joined the game, false otherwise
+     */
     @Override
     public boolean joinGame(String username, int preferredInt, IClientCallback callback) {
-        synchronized (controller) {
+        if (preferredInt<2 || preferredInt>5) {
-            if(playerList.size()==0 && (preferredInt<2||preferredInt>5))
             return false;
-            if (controller.addPlayer(username)) {
+        }
-                if(playerList.size()==0)
+        synchronized (controller) {
-                {
+            if(playerList.isEmpty()){
-                    Game game = new Game(preferredInt);
+                model = new Game(preferredInt);
-                    controller.setModel(game);
+                controller.setModel(model);
                 playerList.setLimit(preferredInt);
             }
+            if (controller.addPlayer(username)) {
                 playerList.add(username);
                 clients.put(username, callback);
                 return true;
@@ -63,21 +95,36 @@ public class RMIServer implements IGameServer {
             return false;
         }
     }
+
+
+    /**
+     * Push an action in actionQueue.
+     * @param action The desired actio
+     * @return true if the action was successfully added, false otherwise
+     */
     @Override
-    public boolean doEvent(NetworkEvent event) throws RemoteException {
+    public boolean doEvent(NetworkEvent action) {
-        return actionQueue.offer(event);
+        return actionQueue.offer(action);
     }
 
 
 
-
+    // RMI's internal methods
-
+    /**
-    // Metodi interni del server
+     * Sends an action to all RMI clients.
+     * @param action The desired action
+     */
     public void notifyAll(NetworkEvent action) throws RemoteException {
         for (IClientCallback cb : clients.values()) {
             cb.onAction(action);
         }
     }
+
+
+    /**
+     * Sends a model game to all RMI clients.
+     * @param model The desired model
+     */
     public void notifyAll(Game model) throws RemoteException {
         for (IClientCallback cb : clients.values()) {
             cb.onGameInit(model);
@@ -86,14 +133,16 @@ public class RMIServer implements IGameServer {
 
 
 
-
-
     // Metodi per avviare server RMI
+    /**
+     * Starts the RMI server.
+     * @return true if the server starts successfully, false otherwise
+     */
     public boolean start() {
         try {
             registry = LocateRegistry.createRegistry(nPort);
             registry.rebind("RMIGameServer", this);
-            System.out.println("RMI Server avviato sulla porta "+nPort);
+            System.out.println("RMI Server started on port: "+nPort);
             return true;
         }
         catch (Exception e) {
@@ -101,6 +150,12 @@ public class RMIServer implements IGameServer {
             return false;
         }
     }
+
+
+    /**
+     * Stops the RMI server.
+     * @return true if the server stops successfully, false otherwise
+     */
     public boolean stop() {
         try {
             registry.unbind("RMIGameServer");