principal.java

multiplataform real time Linux monitor

/** LiMon-JClient
 *  Copyright (C) 2006 Marcelo Busico
 *
 *  Author:  Marcelo Busico    [e-mail]
 *
 *  This program is free software which I release under the GNU General Public
 *  License. You may redistribute and/or modify this program under the terms
 *  of that license as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.  Version 2 is in the
 *  LICENSE.txt file in the top level directory of this distribution.
 * 
 *  To get a copy of the GNU General Puplic License, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package Ventanas;
import java.io.IOException;
import java.net.UnknownHostException;
import limonclient.*;
import javax.swing.*;

public class Principal extends javax.swing.JFrame {
    
    /** Creates new form Principal */
    public Principal() {
        initComponents();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        txtDireccion = new javax.swing.JTextField();
        txtPuerto = new javax.swing.JTextField();
        txtPass = new javax.swing.JPasswordField();
        btnConectar = new javax.swing.JButton();
        btnSalir = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("LiMon - Linux Monitor");
        setResizable(false);
        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Servidor"));
        jLabel1.setText("Direcci\u00f3n:");

        jLabel2.setText("Puerto:");

        jLabel3.setText("Contrase\u00f1a:");

        txtDireccion.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                txtDireccionKeyReleased(evt);
            }
        });

        txtPuerto.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                txtPuertoKeyReleased(evt);
            }
        });

        txtPass.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                txtPassKeyReleased(evt);
            }
        });

        org.jdesktop.layout.GroupLayout jPanel1Layout = new org.jdesktop.layout.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel3)
                    .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel2)
                    .add(org.jdesktop.layout.GroupLayout.TRAILING, jLabel1))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(txtDireccion, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 193, Short.MAX_VALUE)
                    .add(txtPass, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 193, Short.MAX_VALUE)
                    .add(txtPuerto, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 63, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jPanel1Layout.createSequentialGroup()
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel1)
                    .add(txtDireccion, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel2)
                    .add(txtPuerto, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel3)
                    .add(txtPass, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(14, Short.MAX_VALUE))
        );

        btnConectar.setText("Conectar");
        btnConectar.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnConectarActionPerformed(evt);
            }
        });
        btnConectar.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                btnConectarKeyReleased(evt);
            }
        });

        btnSalir.setText("Salir");
        btnSalir.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSalirActionPerformed(evt);
            }
        });

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
                    .add(org.jdesktop.layout.GroupLayout.LEADING, layout.createSequentialGroup()
                        .add(54, 54, 54)
                        .add(btnSalir, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 91, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                        .add(50, 50, 50)
                        .add(btnConectar))
                    .add(org.jdesktop.layout.GroupLayout.LEADING, layout.createSequentialGroup()
                        .addContainerGap()
                        .add(jPanel1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(btnSalir)
                    .add(btnConectar))
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-343)/2, (screenSize.height-189)/2, 343, 189);
    }// </editor-fold>//GEN-END:initComponents

    private void btnConectarKeyReleased(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_btnConectarKeyReleased
        if(evt.getKeyCode()==10)
        {
            conectar();
        }    
    }//GEN-LAST:event_btnConectarKeyReleased

    private void btnConectarActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnConectarActionPerformed
        conectar();
    }//GEN-LAST:event_btnConectarActionPerformed

    private void txtPassKeyReleased(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtPassKeyReleased
        if(evt.getKeyCode()==10)
        {
            btnConectar.grabFocus();
        }    
    }//GEN-LAST:event_txtPassKeyReleased

    private void txtPuertoKeyReleased(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtPuertoKeyReleased
        if(evt.getKeyCode()==10)
        {
            txtPass.grabFocus();
        }    
    }//GEN-LAST:event_txtPuertoKeyReleased

    private void txtDireccionKeyReleased(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtDireccionKeyReleased
        if(evt.getKeyCode()==10)
        {
            txtPuerto.grabFocus();
        }    
    }//GEN-LAST:event_txtDireccionKeyReleased

    private void btnSalirActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnSalirActionPerformed
        System.exit(0);
    }//GEN-LAST:event_btnSalirActionPerformed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Principal().setVisible(true);
            }
        });
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton btnConectar;
    private javax.swing.JButton btnSalir;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JTextField txtDireccion;
    private javax.swing.JPasswordField txtPass;
    private javax.swing.JTextField txtPuerto;
    // End of variables declaration//GEN-END:variables
    
    private void conectar()
    {
        // Verificar que los campos no esten vacios
        if(verificarDireccion(txtDireccion)==false)
        {
            txtDireccion.grabFocus();
            return;
        }
        if(verificarPuerto(txtPuerto)==false)
        {
            txtPuerto.grabFocus();
            return;
        }
        if(verificarPassword(txtPass)==false)
        {
            txtPass.grabFocus();
            return;
        }

        /** Conecta al servidor */
        Conexion cn=null;
        System.out.println("Conectando al servidor...");
        try
        {
            cn=new Conexion(txtDireccion.getText(), Integer.parseInt(txtPuerto.getText()), new String(txtPass.getPassword()));
        }
        catch (IOException e)
        {
            //Direccion invalida
            if(e.getMessage().compareTo("Invalid argument or cannot assign requested address")==0)
            {
                JOptionPane.showMessageDialog(this,"Error: Dirección de servidor inválida.");
                return;
            }
            
            //Servidor desconocido
            
            if(UnknownHostException.class.equals(e.getClass())==true)
            {
                JOptionPane.showMessageDialog(this,"Error: No se ha encontrado el servidor.");
                return;
            }
            
            //Puerto rechazado
            if(e.getMessage().compareTo("Connection refused")==0)
            {
                JOptionPane.showMessageDialog(this,"Error: El servidor ha rechazado la conexión al puerto especificado.");
                return;
            }
            
            //Otro error
            JOptionPane.showMessageDialog(this,"Error: " + e);
        }
        
        //Pedir confirmacion de contraseña valida
        Cabecera cab=new Cabecera(Cabecera.IdConfirmaPassword,cn.getPassword());
        try
        {
            cab.enviarCabecera(cn.getSalida());
            //Recibe cabecera del servidor
            cab.recibirCabecera(cn.getEntrada());            
        }
        catch (IOException e)
        {
            JOptionPane.showMessageDialog(this,"Error: " + e);
        }
        
        //Verificar cabecera de contraseña
        if(cab.getIdentificador()==Cabecera.IdPasswordIncorrecta)
        {
            JOptionPane.showMessageDialog(this,"Error: La contraseña ingresada es incorrecta");
            try { cn.cerrarConexion(); } catch (IOException e) { ; }
            txtPass.grabFocus();
            txtPass.setText("");
            return;
        }
        
        //Abre el monitor en tiempo real
        RTMonitor monitor=null;
        monitor = new RTMonitor(cn, this);
        this.setVisible(false);
        monitor.setVisible(true);
    }
    
    private boolean verificarPuerto (JTextField Texto)
    {
        //Verificar que Texto sea numerico positivo y no excesivo
        int puerto;
        if(Texto.getText().length()>0)
        {
            try
            {
                puerto = Integer.parseInt(Texto.getText());
                if(puerto<=0)
                {
                    JOptionPane.showMessageDialog(this, "Puerto: Ingrese un valor mayor a cero.");
                    Texto.setText(null);
                }
                else
                {
                    if(puerto>65535)
                    {
                        JOptionPane.showMessageDialog(this, "Puerto: Ingrese un valor menor a 65536.");
                        Texto.setText(null);
                    }
                    else
                        return true;
                }
            }
            catch(NumberFormatException e)
            {
                Texto.setText(null);
            }
        }
        JOptionPane.showMessageDialog(this, "Puerto: Debe ingresar un valor numérico.");
        return false;
    }

    private boolean verificarDireccion (JTextField Texto)
    {
        //Verificar que Texto no este vacio
        if(Texto.getText().length()>0)
        {
            return true;
        }
        JOptionPane.showMessageDialog(this, "Dirección: Debe ingresar la direccion del servidor.");
        return false;
    }

    private boolean verificarPassword (JTextField Texto)
    {
        //Verificar que Texto no este vacio
        if(Texto.getText().length()>0)
        {
            return true;
        }
        JOptionPane.showMessageDialog(this, "Contraseña: Debe ingresar la contraseña del servidor.");
        return false;
    }

}