Implementa facade

.gitignore

@@ -0,0 +1,7 @@
+/pitiupi/build/
+/pitiupi/dist/
+/pitiupi.chat/build/
+/pitiupi.chat/dist/
+/pitiupi.chat/nbproject/private/
+/pitiupi.screenCast/build/
+/pitiupi.screenCast/dist/

pitiupi.chat/build/built-jar.properties

@@ -1,6 +1,6 @@
-#Thu, 16 Jul 2026 15:21:36 -0300
+#Fri, 17 Jul 2026 17:31:55 -0300
 
 
-/home/flavio/NetBeansProjects/pitiupi.chat=
+/home/perolanegra/facul/pitiupi/pitiupi.chat=
 
-/home/flavio/NetBeansProjects/pitiupi=
+/home/perolanegra/facul/pitiupi/pitiupi=

pitiupi.chat/nbproject/project.properties

@@ -47,8 +47,8 @@ javac.modulepath=
 javac.processormodulepath=
 javac.processorpath=\
     ${javac.classpath}
-javac.source=25
+javac.source=21
-javac.target=25
+javac.target=21
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}

pitiupi.chat/src/pitiupi/chat/GUI/ChatWindow.java

@@ -5,18 +5,16 @@
  */
 package pitiupi.chat.GUI;
 
-import java.io.IOException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 import pitiupi.chat.net.ChatMessage;
-import pitiupi.GUI.MainWindow;
+import pitiupi.plugin.PitiupiFacade;
 import pitiupi.net.Message;
 
 /**
  *
  * @author flavio
+ * @author tony
  */
 public class ChatWindow extends javax.swing.JDialog {
 
@@ -29,10 +27,10 @@ public class ChatWindow extends javax.swing.JDialog {
     private javax.swing.JSplitPane jSplitPane1;
     private javax.swing.JTextArea jTextArea1;
 
-    private final MainWindow mainWindow;
+    private final PitiupiFacade pitiupi;
 
-    public ChatWindow(MainWindow mainWindow) {
+    public ChatWindow(PitiupiFacade pitiupi) {
-        this.mainWindow = mainWindow;
+        this.pitiupi = pitiupi;
         initComponents();
     }
 
@@ -94,17 +92,13 @@ public class ChatWindow extends javax.swing.JDialog {
         if (jTextArea1.getText().trim().length() == 0) {
             return;
         }
-        ChatMessage message = new ChatMessage(mainWindow.getName(), jTextArea1.getText());
+        ChatMessage message = new ChatMessage(pitiupi.getUserName(), jTextArea1.getText());
         this.sendChatMessage(message);
         jTextArea1.setText("");
     }
 
     public void sendChatMessage(Message message) {
-        try {
+        pitiupi.send(message);
-            mainWindow.getSocket().send(message.toByteArray());
-        } catch (IOException ex) {
-            Logger.getLogger(MainWindow.class.getName()).log(Level.SEVERE, null, ex);
-        }
     }
 
     public void receiveChatMessage(ChatMessage message) {

pitiupi.chat/src/pitiupi/chat/plugin/ChatPlugin.java

@@ -7,7 +7,7 @@ package pitiupi.chat.plugin;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.ObjectInputStream;
-import pitiupi.GUI.MainWindow;
+import pitiupi.plugin.PitiupiFacade;
 import pitiupi.chat.GUI.ChatMenu;
 import pitiupi.chat.GUI.ChatWindow;
 import pitiupi.chat.net.ChatMessage;
@@ -17,20 +17,18 @@ import pitiupi.plugin.Plugin;
 /**
  *
  * @author flavio
+ * @author tony
  */
 public class ChatPlugin implements Plugin {
 
     private ChatWindow chatWindow;
-    private MainWindow mainWindow;
+    private PitiupiFacade pitiupi;
-
-    public ChatPlugin() {
-    }
 
     @Override
-    public void createPlugin(MainWindow mainWindow) {
+    public void createPlugin(PitiupiFacade pitiupi) {
-        this.mainWindow = mainWindow;
+        this.pitiupi = pitiupi;
-        this.chatWindow = new ChatWindow(mainWindow);
+        this.chatWindow = new ChatWindow(pitiupi);
-        this.mainWindow.addMenu(new ChatMenu(chatWindow));
+        this.pitiupi.addMenu(new ChatMenu(chatWindow));
     }
 
     @Override

pitiupi.screenCast/build/built-jar.properties

@@ -1,6 +1,6 @@
-#Thu, 16 Jul 2026 15:21:39 -0300
+#Thu, 16 Jul 2026 17:43:45 -0300
 
 
-/home/flavio/NetBeansProjects/pitiupi.screenCast=
+/home/perolanegra/facul/2.26/fls/pitiupi/pitiupi.screenCast=
 
-/home/flavio/NetBeansProjects/pitiupi=
+/home/perolanegra/facul/2.26/fls/pitiupi/pitiupi=

pitiupi.screenCast/dist/README.TXT

@@ -1,32 +0,0 @@
-========================
-BUILD OUTPUT DESCRIPTION
-========================
-
-When you build an Java application project that has a main class, the IDE
-automatically copies all of the JAR
-files on the projects classpath to your projects dist/lib folder. The IDE
-also adds each of the JAR files to the Class-Path element in the application
-JAR files manifest file (MANIFEST.MF).
-
-To run the project from the command line, go to the dist folder and
-type the following:
-
-java -jar "pitiupi.screenCast.jar" 
-
-To distribute this project, zip up the dist folder (including the lib folder)
-and distribute the ZIP file.
-
-Notes:
-
-* If two JAR files on the project classpath have the same name, only the first
-JAR file is copied to the lib folder.
-* Only JAR files are copied to the lib folder.
-If the classpath contains other types of files or folders, these files (folders)
-are not copied.
-* If a library on the projects classpath also has a Class-Path element
-specified in the manifest,the content of the Class-Path element has to be on
-the projects runtime path.
-* To set a main class in a standard Java project, right-click the project node
-in the Projects window and choose Properties. Then click Run and enter the
-class name in the Main Class field. Alternatively, you can manually type the
-class name in the manifest Main-Class element.

pitiupi.screenCast/nbproject/project.properties

@@ -45,8 +45,8 @@ javac.modulepath=
 javac.processormodulepath=
 javac.processorpath=\
     ${javac.classpath}
-javac.source=25
+javac.source=21
-javac.target=25
+javac.target=21
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}

pitiupi/nbproject/private/private.properties

@@ -5,4 +5,4 @@ do.jlink=false
 javac.debug=true
 javadoc.preview=true
 jlink.strip=false
-user.properties.file=/home/flavio/snap/netbeans/145/build.properties
+user.properties.file=/home/perolanegra/snap/netbeans/145/build.properties

pitiupi/nbproject/private/private.xml

@@ -2,9 +2,6 @@
 <project-private xmlns="http://www.netbeans.org/ns/project-private/1">
     <editor-bookmarks xmlns="http://www.netbeans.org/ns/editor-bookmarks/2" lastBookmarkId="0"/>
     <open-files xmlns="http://www.netbeans.org/ns/projectui-open-files/2">
-        <group>
+        <group/>
-            <file>file:/home/flavio/NetBeansProjects/pitiupi/src/pitiupi/control/PluginManager.java</file>
-            <file>file:/home/flavio/NetBeansProjects/pitiupi/src/pitiupi/control/ImageTransformation.java</file>
-        </group>
     </open-files>
 </project-private>

pitiupi/nbproject/project.properties

@@ -46,8 +46,8 @@ javac.modulepath=
 javac.processormodulepath=
 javac.processorpath=\
     ${javac.classpath}
-javac.source=25
+javac.source=21
-javac.target=25
+javac.target=21
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}

pitiupi/plugins/pitiupi.screenCast.jar

@@ -1 +0,0 @@
-../../pitiupi.screenCast/dist/pitiupi.screenCast.jar

pitiupi/src/pitiupi/GUI/MainWindow.java

@@ -11,6 +11,7 @@ import java.util.List;
 import javax.swing.JMenu;
 import pitiupi.control.PluginLoader;
 import pitiupi.plugin.Plugin;
+import pitiupi.control.HeartbeatManager;
 
 /**
  *
@@ -23,6 +24,8 @@ public class MainWindow extends javax.swing.JFrame {
     private javax.swing.JLabel status;
     private javax.swing.JPanel statusPanel;
     private javax.swing.JTabbedPane tabbedPane;
+    private HeartbeatManager heartbeatManager;
+    private OnlineUsersPanel onlineUsersPanel;
 
     private Socket socket;
 
@@ -63,6 +66,12 @@ public class MainWindow extends javax.swing.JFrame {
 
         this.socket = new Socket(this);
         this.socket.start();
+        
+        this.heartbeatManager = new HeartbeatManager(this);
+        this.onlineUsersPanel = new OnlineUsersPanel();
+        this.heartbeatManager.addPeerListener(this.onlineUsersPanel);
+        this.getContentPane().add(this.onlineUsersPanel, java.awt.BorderLayout.LINE_END);
+        this.heartbeatManager.start();
 
         this.setSize(new java.awt.Dimension(1024, 768));
         this.pluginManager = new PluginLoader(this);
@@ -76,6 +85,10 @@ public class MainWindow extends javax.swing.JFrame {
         System.exit(0);
     }
 
+    public HeartbeatManager getHeartbeatManager() {
+        return heartbeatManager;
+    }
+
     public String getUserName(){
         return this.userName;
     }

pitiupi/src/pitiupi/GUI/OnlineUsersPanel.java

@@ -0,0 +1,39 @@
+package pitiupi.GUI;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.util.List;
+import javax.swing.BorderFactory;
+import javax.swing.DefaultListModel;
+import javax.swing.JList;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.SwingUtilities;
+import pitiupi.control.PeerInfo;
+import pitiupi.control.PeerListener;
+
+public class OnlineUsersPanel extends JPanel implements PeerListener {
+
+    private final DefaultListModel<String> listModel;
+    private final JList<String> userList;
+
+    public OnlineUsersPanel() {
+        setLayout(new BorderLayout());
+        setBorder(BorderFactory.createTitledBorder("Online"));
+        setPreferredSize(new Dimension(160, 0));
+
+        listModel = new DefaultListModel<>();
+        userList = new JList<>(listModel);
+        add(new JScrollPane(userList), BorderLayout.CENTER);
+    }
+
+    @Override
+    public void onPeersChanged(List<PeerInfo> peers) {
+        SwingUtilities.invokeLater(() -> {
+            listModel.clear();
+            for (PeerInfo peer : peers) {
+                listModel.addElement(peer.toString());
+            }
+        });
+    }
+}

pitiupi/src/pitiupi/control/HeartbeatManager.java

@@ -0,0 +1,98 @@
+package pitiupi.control;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import pitiupi.GUI.MainWindow;
+import pitiupi.net.HeartbeatMessage;
+
+public class HeartbeatManager {
+
+    private static final long HEARTBEAT_INTERVAL_MS = 5000;
+    private static final long PEER_TIMEOUT_MS = 15000; // ~3 batimentos perdidos
+
+    private final MainWindow mainWindow;
+    private final Map<String, PeerInfo> peers = new ConcurrentHashMap<>();
+    private final List<PeerListener> listeners = new CopyOnWriteArrayList<>();
+    private ScheduledExecutorService scheduler;
+
+    public HeartbeatManager(MainWindow mainWindow) {
+        this.mainWindow = mainWindow;
+    }
+
+    public void start() {
+        scheduler = Executors.newScheduledThreadPool(1);
+        scheduler.scheduleAtFixedRate(this::announce, 0, HEARTBEAT_INTERVAL_MS, TimeUnit.MILLISECONDS);
+        scheduler.scheduleAtFixedRate(this::checkTimeouts, HEARTBEAT_INTERVAL_MS, HEARTBEAT_INTERVAL_MS, TimeUnit.MILLISECONDS);
+    }
+
+    public void stop() {
+        if (scheduler != null) {
+            scheduler.shutdownNow();
+        }
+    }
+
+    private void announce() {
+        try {
+            HeartbeatMessage msg = new HeartbeatMessage(mainWindow.getUserName());
+            mainWindow.getSocket().send(msg.toByteArray());
+        } catch (IOException ex) {
+            Logger.getLogger(HeartbeatManager.class.getName()).log(Level.WARNING, "Falha ao enviar heartbeat", ex);
+        }
+    }
+
+    // Chamado pelo Socket quando um pacote é identificado como heartbeat
+    public void receiveHeartbeat(HeartbeatMessage msg, InetAddress from) {
+        // ignora o próprio heartbeat (multicast normalmente ecoa pro remetente)
+        if (msg.getUserName().equals(mainWindow.getUserName())) {
+            return;
+        }
+
+        String key = from.getHostAddress() + "#" + msg.getUserName();
+        boolean isNew = !peers.containsKey(key);
+
+        PeerInfo peer = peers.computeIfAbsent(key, k -> new PeerInfo(msg.getUserName(), from, msg.getTimestamp()));
+        peer.touch(System.currentTimeMillis());
+
+        if (isNew) {
+            notifyListeners();
+        }
+    }
+
+    private void checkTimeouts() {
+        long now = System.currentTimeMillis();
+        boolean changed = peers.values().removeIf(p -> now - p.getLastSeen() > PEER_TIMEOUT_MS);
+        if (changed) {
+            notifyListeners();
+        }
+    }
+
+    private void notifyListeners() {
+        List<PeerInfo> snapshot = new ArrayList<>(peers.values());
+        for (PeerListener l : listeners) {
+            l.onPeersChanged(snapshot);
+        }
+    }
+
+    public void addPeerListener(PeerListener l) {
+        listeners.add(l);
+        l.onPeersChanged(new ArrayList<>(peers.values()));
+    }
+
+    public void removePeerListener(PeerListener l) {
+        listeners.remove(l);
+    }
+
+    public List<PeerInfo> getPeers() {
+        return new ArrayList<>(peers.values());
+    }
+}

pitiupi/src/pitiupi/control/PeerInfo.java

@@ -0,0 +1,37 @@
+package pitiupi.control;
+
+import java.net.InetAddress;
+
+public class PeerInfo {
+
+    private final String userName;
+    private final InetAddress address;
+    private volatile long lastSeen;
+
+    public PeerInfo(String userName, InetAddress address, long lastSeen) {
+        this.userName = userName;
+        this.address = address;
+        this.lastSeen = lastSeen;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public InetAddress getAddress() {
+        return address;
+    }
+
+    public long getLastSeen() {
+        return lastSeen;
+    }
+
+    public void touch(long timestamp) {
+        this.lastSeen = timestamp;
+    }
+
+    @Override
+    public String toString() {
+        return userName + " (" + address.getHostAddress() + ")";
+    }
+}

pitiupi/src/pitiupi/control/PeerListener.java

@@ -0,0 +1,7 @@
+package pitiupi.control;
+
+import java.util.List;
+
+public interface PeerListener {
+    void onPeersChanged(List<PeerInfo> peers);
+}

pitiupi/src/pitiupi/control/PluginLoader.java

@@ -15,10 +15,11 @@ import java.util.Vector;
 import pitiupi.GUI.MainWindow;
 import pitiupi.Main;
 import pitiupi.plugin.Plugin;
-
+import pitiupi.plugin.PitiupiFacade;
 /**
  *
  * @author flavio
+ * @author tony
  */
 public class PluginLoader {
 
@@ -55,12 +56,14 @@ public class PluginLoader {
             // 4. Locate and instantiate all classes implementing the Plugin interface
             ServiceLoader<Plugin> serviceLoader = ServiceLoader.load(Plugin.class, pluginClassLoader);
 
-            System.out.println("\n--- Executing Discovered Plugins ---" + serviceLoader.findFirst());
+	    PitiupiFacade facade = new PitiupiFacade(this.mainWindow);
-            for (Plugin plugin : serviceLoader) {
+
-                System.out.println("Loading: " + plugin.getName());
+	    System.out.println("\n--- Executing Discovered Plugins ---" + serviceLoader.findFirst());
-                plugin.createPlugin(this.mainWindow);
+	    for (Plugin plugin : serviceLoader) {
-                this.mainWindow.getPlugins().add(plugin);
+    		System.out.println("Loading: " + plugin.getName());
-            }
+    		plugin.createPlugin(facade);
+    		this.mainWindow.getPlugins().add(plugin);
+	    }
 
         } catch (MalformedURLException e) {
             System.out.println(e.toString());

pitiupi/src/pitiupi/net/HeartbeatMessage.java

@@ -0,0 +1,20 @@
+package pitiupi.net;
+
+public class HeartbeatMessage extends Message {
+
+    private final String userName;
+    private final long timestamp;
+
+    public HeartbeatMessage(String userName) {
+        this.userName = userName;
+        this.timestamp = System.currentTimeMillis();
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public long getTimestamp() {
+        return timestamp;
+    }
+}

pitiupi/src/pitiupi/net/Message.java

@@ -1,4 +1,4 @@
-/*
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Line truncated
  * To change this license header, choose License Headers in Project Properties.
  * To change this template file, choose Tools | Templates
  * and open the template in the editor.

pitiupi/src/pitiupi/net/Socket.java

@@ -17,10 +17,13 @@ import java.net.UnknownHostException;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import pitiupi.plugin.Plugin;
-
+import java.net.NetworkInterface;
+import java.net.InetSocketAddress;
+import pitiupi.net.HeartbeatMessage; // lib 
 /**
  *
  * @author flavio
+ * @author tony
  */
 public class Socket extends Thread {
 
@@ -41,7 +44,45 @@ public class Socket extends Thread {
             multicastSocket.setSendBufferSize(256000);
             multicastSocket.setReceiveBufferSize(256000);
             multicastSocket.setReuseAddress(true);
-            multicastSocket.joinGroup(address);
+            System.out.println("Endereço local: " + multicastSocket.getLocalAddress());
+            System.out.println("Interface: " + multicastSocket.getNetworkInterface());
+            //InetAddress local = InetAddress.getLocalHost();
+
+            NetworkInterface nif = null;
+
+            for (NetworkInterface ni : java.util.Collections.list(
+                    NetworkInterface.getNetworkInterfaces())) {
+
+                if (ni.isUp() 
+                    && ni.supportsMulticast() 
+                    && !ni.isLoopback()) {
+
+                    nif = ni;
+                    break;
+                }
+             }
+            if (nif != null) {
+               System.out.println("Interface escolhida:");
+               System.out.println("Nome: " + nif.getName());
+               System.out.println("Descrição: " + nif.getDisplayName());
+               System.out.println("Ativa: " + nif.isUp());
+               System.out.println("Multicast: " + nif.supportsMulticast());
+
+               System.out.println("Endereços IP:");
+
+               for (InetAddress ip : java.util.Collections.list(nif.getInetAddresses())) {
+                   System.out.println("  " + ip.getHostAddress());
+              }
+            } else {
+               System.out.println("Nenhuma interface multicast encontrada");
+            }
+            multicastSocket.joinGroup(
+              new InetSocketAddress(address, main.getPort()),
+              nif
+            );
+            System.out.println("nif: " + nif);
+
+         // multicastSocket.joinGroup(address);
         } catch (IOException ex) {
             System.out.println("There is no socket connection. Sorry.");
             System.out.println(ex.toString());
@@ -51,15 +92,27 @@ public class Socket extends Thread {
     public void send(byte[] msg) throws IOException {
         DatagramPacket msgPacket;
         msgPacket = new DatagramPacket(msg, msg.length, this.address, this.main.getPort());
+
+        System.out.println("Enviando pacote");
+        System.out.println("Destino: " + address);
+        System.out.println("Porta: " + this.main.getPort());
+        System.out.println("Bytes: " + msg.length);
+
         multicastSocket.send(msgPacket);
     }
-
+//-------------------------------------------------------------------------------------------------------
     public void receive() throws UnknownHostException, IOException, ClassNotFoundException {
         byte[] buf = new byte[256000];
         while (true) {
-            // Receive the information and print it.
             DatagramPacket msgPacket = new DatagramPacket(buf, buf.length);
             multicastSocket.receive(msgPacket);
+
+            HeartbeatMessage heartbeat = tryParseHeartbeat(msgPacket.getData());
+            if (heartbeat != null) {
+                main.getHeartbeatManager().receiveHeartbeat(heartbeat, msgPacket.getAddress());
+                continue;
+            }
+
             for (Plugin plugin : main.getPlugins()) {
                 System.out.println(msgPacket.getAddress().toString());
                 plugin.receiveMessage(msgPacket.getData());
@@ -67,6 +120,17 @@ public class Socket extends Thread {
         }
     }
 
+    private HeartbeatMessage tryParseHeartbeat(byte[] data) {
+        try {
+            ByteArrayInputStream bais = new ByteArrayInputStream(data);
+            ObjectInput in = new ObjectInputStream(bais);
+            Object obj = in.readObject();
+            return (obj instanceof HeartbeatMessage) ? (HeartbeatMessage) obj : null;
+        } catch (IOException | ClassNotFoundException | ClassCastException ex) {
+            return null; 
+        }
+    }
+//------------------------------------------------------------------------------------------------------------------
     @Override
     public void run() {
         try {

pitiupi/src/pitiupi/plugin/PitiupiFacade.java

@@ -0,0 +1,35 @@
+package pitiupi.plugin;
+
+import java.io.IOException;
+import javax.swing.JMenu;
+import pitiupi.GUI.MainWindow;
+import pitiupi.net.Message;
+
+public class PitiupiFacade {
+
+    private final MainWindow mainWindow;
+
+    public PitiupiFacade(MainWindow mainWindow) {
+        this.mainWindow = mainWindow;
+    }
+
+    public void addMenu(JMenu menu) {
+        mainWindow.addMenu(menu);
+    }
+
+    public void send(Message message) {
+        try {
+            mainWindow.getSocket().send(message.toByteArray());
+        } catch (IOException ex) {
+            System.out.println("Falha ao enviar mensagem: " + ex);
+        }
+    }
+
+    public String getUserName() {
+        return mainWindow.getUserName();
+    }
+
+    public int getPort() {
+        return mainWindow.getPort();
+    }
+}

pitiupi/src/pitiupi/plugin/Plugin.java

@@ -4,20 +4,19 @@
  */
 package pitiupi.plugin;
 
-import javax.swing.JMenu;
-import pitiupi.GUI.MainWindow;
 import pitiupi.net.Message;
 
 /**
  *
  * @author flavio
+ * @author tony
  */
 public interface Plugin {
 
     public String getName();
     public String getAuthor();
     public String getVersion();
-    public void createPlugin(MainWindow window);
+    public void createPlugin(PitiupiFacade pitiupi);
     public Message getMessage();
     public void receiveMessage(byte[] message);
-}
+}