Problem with sockets when closing client: java.net.SocketException

1

Hello, good morning, good afternoon or good evening, I'm having a problem, with a system I'm creating, thank you to anyone who can help. So, this system basically passes a "protocol" to the servers and it returns an object, and vice versa, however, when you end the client and reopen without doing the same with the server, a server error is caused, and when trying doing some return of an object after re-opening the client is caused an error.

Server error closing client:

java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:210)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
    at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
    at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
    at java.io.InputStreamReader.read(InputStreamReader.java:184)
    at java.io.BufferedReader.fill(BufferedReader.java:161)
    at java.io.BufferedReader.readLine(BufferedReader.java:324)
    at java.io.BufferedReader.readLine(BufferedReader.java:389)
    at main.java.Manager.run(Manager.java:45)

Client error when reopening and trying to get object:

java.io.StreamCorruptedException: invalid stream header: 73720013
    at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:866)
    at java.io.ObjectInputStream.(ObjectInputStream.java:358)
    at main.java.controllers.VendedoresUI.load(VendedoresUI.java:69)
    at main.java.controllers.VendedoresUI.initialize(VendedoresUI.java:54)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at main.java.controllers.Controller.loadUI(Controller.java:150)
    at main.java.controllers.Controller.changeUI(Controller.java:111)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
    at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
    at javafx.event.Event.fireEvent(Event.java:198)
    at javafx.scene.Scene$ClickGenerator.postProcess(Scene.java:3470)
    at javafx.scene.Scene$ClickGenerator.access$8100(Scene.java:3398)
    at javafx.scene.Scene$MouseHandler.process(Scene.java:3766)
    at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
    at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:394)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$353(GlassViewEventHandler.java:432)
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:431)
    at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
    at com.sun.glass.ui.View.notifyMouse(View.java:937)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
    at java.lang.Thread.run(Thread.java:748)
  • Server Classes:
  • 1.1. Server.java

    
    
    public class Server extends Thread{
    
        public Server(){}
    
        public void run() {
    
            try{
    
                ServerSocket listener = new ServerSocket(4444);
                listener.setSoTimeout(0);
    
                System.out.println("Server is now running");
    
                try {
                    while (true) {
    
                        Socket socket = listener.accept();
    
                        new Manager(socket).start();
                    }
                } finally {
                    listener.close();
                }
    
            } catch (IOException ioexception){
    
                System.out.println("\u001B[31mError opening server, more info: ");
                System.out.println(ioexception);
                System.out.println("Closing server...");
                System.exit(0);
    
            }
    
        }
    
    }
    
    

    1.2. Manager.java

    public class Manager extends Thread{
        private Socket socket;
        private BufferedReader in;
        private PrintWriter out;
    
        public Manager(Socket socket){
            this.socket = socket;
            System.out.println("\u001B[32m" + socket.getLocalAddress() + ":" + socket.getPort() + " connected");
        }
    
        @Override
        public void run() {
    
            try {
    
                out = new PrintWriter(socket.getOutputStream(), true);
    
                out.println("Connected");
    
                while(true) {
                    ObjectOutputStream objectOutput = new ObjectOutputStream(socket.getOutputStream());
                    in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    
    
    
                    if(in.readLine().contains(Protocols.VENDEDOR_GET_ALL)) {
                        ResultSet res = SQLManager.Query("SELECT * FROM vendedores");
                        List list = new ArrayList();
    
                        while (res.next()) {
                            Vendedor vendedor = new Vendedor();
                            vendedor.setNOME(res.getString("NOME"));
                            vendedor.setCPF(res.getString("CPF"));
                            vendedor.setCONTATO(res.getString("CONTATO"));
                            vendedor.setCONTA(res.getInt("CONTA"));
                            vendedor.setBANCO(res.getInt("BANCO"));
                            vendedor.setAGENCIA(res.getString("AGENCIA"));
                            vendedor.setCORRENTE(res.getString("CORRENTE"));
                            list.add(vendedor);
                        }
                        objectOutput.writeObject(list);
                    }
                    objectOutput.flush();
                }
    
            } catch (IOException e) {
                System.out.println("\u001B[31m" + socket.getLocalAddress() + ":" + socket.getPort() + " disconnected");
                e.printStackTrace();
                interrupt();
            } catch (SQLException | ClassNotFoundException e) {
                Logger.getLogger(Manager.class.getName()).log(Level.SEVERE, null, e);
            }
    
        }
    }
    
    
  • Client Classes
  • 2.1. ClientSocket.java

    public class ClientSocket {
    
        private static Socket socket = null;
        private static BufferedReader in;
        private static PrintWriter out;
    
        public static void load(){
            try {
    
                socket = new Socket("127.0.0.1", 4444);
                in = new BufferedReader(
                        new InputStreamReader(socket.getInputStream()));
                out = new PrintWriter(socket.getOutputStream(), true);
    
                System.out.print(ClientSocket.getIn().readLine());
    
            } catch(IOException ioexception){
                Logger.getLogger(ClientSocket.class.getName()).log(Level.SEVERE, null, ioexception);
            }
        }
    
        public static Socket getSocket() {
            return socket;
        }
    
        public static BufferedReader getIn() {
            return in;
        }
    
        public static PrintWriter getOut() {
            return out;
        }
    }
    

    2.2 VendorsUI.java

    public class VendedoresUI implements Initializable {
    
        @FXML
        private TableView table;
    
        @FXML
        private TableColumn colName;
    
        @FXML
        private TableColumn colCPF;
    
        @FXML
        private TableColumn colContato;
    
        @FXML
        private TableColumn colConta;
    
        @FXML
        private TableColumn colBanco;
    
        @FXML
        private TableColumn colAgencia;
    
        @FXML
        private TableColumn colCorrente;
    
        ObservableList list;
    
        @Override
        public void initialize(URL location, ResourceBundle resources) {
    
            load();
    
        }
    
        private void load(){
            try {
                if(ClientSocket.getSocket().isClosed()){
                    ClientSocket.load();
                }
    
                PrintWriter escritor = new PrintWriter(ClientSocket.getSocket().getOutputStream(), true);
    
                escritor.println(Protocols.VENDEDOR_GET_ALL);
    
    
                ObjectInputStream obi = new ObjectInputStream(ClientSocket.getSocket().getInputStream());
                List mList = (List) obi.readObject();
    
                list = FXCollections.observableArrayList(mList);
    
                colName.setCellValueFactory(new PropertyValueFactory("NOME"));
                colCPF.setCellValueFactory(new PropertyValueFactory("CPF"));
                colContato.setCellValueFactory(new PropertyValueFactory("CONTATO"));
                colConta.setCellValueFactory(new PropertyValueFactory("CONTA"));
                colBanco.setCellValueFactory(new PropertyValueFactory("BANCO"));
                colAgencia.setCellValueFactory(new PropertyValueFactory("AGENCIA"));
                colCorrente.setCellValueFactory(new PropertyValueFactory("CORRENTE"));
                table.setItems(list);
    
            } catch (IOException | ClassNotFoundException e) {
                e.printStackTrace();
            }
    
        }
    }
    
        
    asked by anonymous 20.12.2018 / 02:51

    0 answers