authentication.java

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/*
 * @author  Reghu
 * @version 1.0
 *
 * Development Environment        :  Oracle9i JDeveloper
 * Name of the Application        :  Authentication.java
 * Creation/Modification History  :
 *
 * Reghu             30-Dec-2002    Created
 *
 */
package oracle.otnsamples.vsm.client;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import oracle.otnsamples.util.ServiceLocator;

import oracle.otnsamples.vsm.services.ProfileException;
import oracle.otnsamples.vsm.services.ProfileManagement;
import oracle.otnsamples.vsm.services.ProfileManagementHome;
import oracle.otnsamples.vsm.services.data.Profile;


/**
 * This java file prompts the login page for Admin utility of VSM application.
 *
 * @author Reghu
 * @version 1.0
 */
public class Authentication extends JDialog implements Runnable {

  // UI components 
  private JButton cancel        = new JButton();
  private JButton login         = new JButton();
  private JLabel header         = new JLabel();
  private JLabel password       = new JLabel();
  private JLabel username       = new JLabel();
  private JPasswordField passwd = new JPasswordField();
  private JTextField user       = new JTextField();
  private static SPScreen splash;

  private Thread process = null;// Thread object for dataprocessing  
  
  /**
   * Constructor, initializes and sets up listeners for the GUI components of
   * the application
   */
  public Authentication() {
    try {
      jbInit();
    } catch(Exception e) {
      e.printStackTrace();
    }
  }

 /**
  * This method calls the appropriate method for each thread
  */
  public void run() {
    try { 
       if (process == Thread.currentThread()) {
         splash = new SPScreen();
         AdminSample.init();
       }
    } catch (Exception e) {
      e.printStackTrace();
    } 
  }  

  /**
   * Method to start a thread for event processing
   */
  public void processEvent() {
    if( process == null ) {
      process = new Thread(this,"ProcessThread");
      process.start();
    }
  }

  /**
   * Initialize all the GUI components and the layout
   * @exception Exception
   */
  private void jbInit() throws Exception {
    this.getContentPane().setLayout(null);
    this.setSize(new Dimension(425, 248));
    this.setTitle("VSM Admin Login Information");
    this.setResizable(false);

    username.setText("User Name");
    username.setBounds(new Rectangle(80, 50, 85, 35));
    username.setFont(new Font("Book Antiqua", 1, 14));
    username.setForeground(new Color(131, 131, 87));

    password.setText("Password");
    password.setBounds(new Rectangle(80, 85, 85, 35));
    password.setFont(new Font("Book Antiqua", 1, 14));
    password.setForeground(new Color(131, 131, 87));

    user.setBounds(new Rectangle(165, 55, 160, 25));
    user.setEditable(true);

    header.setBounds(new Rectangle(25, 15, 370, 190));
    header.setBorder(BorderFactory.createTitledBorder("OTN WebStore Administration"));
    header.setBackground(new Color(223, 223, 191));

    passwd.setBounds(new Rectangle(165, 90, 160, 25));

    login.setText("Login");
    login.setBounds(new Rectangle(150, 135, 75, 30));
    login.setForeground(new Color(131, 131, 87));
    login.setBackground(new Color(223, 223, 191));
    login.setFont(new Font("Book Antiqua", 1, 14));
    // Action to be prformed when the user logins to the application
    login.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          String msg = null;

          if((user.getText() == null) || "".equals(user.getText().trim())) {
            JOptionPane.showMessageDialog(
                                          Authentication.this,
                                          "Please Enter User Name", "Error",
                                          JOptionPane.ERROR_MESSAGE);
          } else if(
                    (passwd.getPassword() == null) ||
                      (passwd.getPassword().length == 0)) {
            JOptionPane.showMessageDialog(
                                          Authentication.this,
                                          "Please Enter Password", "Error",
                                          JOptionPane.ERROR_MESSAGE);
          } else {
            String userName              = user.getText();
            String password              = new String(passwd.getPassword());
            ProfileManagement profRemote = null;
            try {
              // Get the EJB Home 
              ProfileManagementHome profHome =
                            (ProfileManagementHome) ServiceLocator.getLocator()
                                             .getService("ProfileManagement");
              // Get Remote Interface
              profRemote = profHome.create();

              Profile prof = profRemote.validateUser(userName, password);

              if(prof.getRole().equals("malladmin")) {
                Authentication.this.setVisible(false);
                Authentication.this.dispose();
                processEvent();
              } else {
                JOptionPane.showMessageDialog(
                                              Authentication.this,
                                              "Don't have the privileges of Admin",
                                              "Error", JOptionPane.ERROR_MESSAGE);
              }
            } catch(ProfileException exp) {
              JOptionPane.showMessageDialog(
                                            Authentication.this,
                                            "Invalid user credentials", "Error",
                                            JOptionPane.ERROR_MESSAGE);
            } catch(Exception exp) {
              JOptionPane.showMessageDialog(
                                            Authentication.this, exp.toString(),
                                            "Error", JOptionPane.ERROR_MESSAGE);

            } finally {
              try {
                if(profRemote != null) {
                  profRemote.remove();
                }
              } catch(Exception ex) {
                // do nothing
              }
            }
          }
        }
      });
    cancel.setText("Exit");
    cancel.setBounds(new Rectangle(245, 135, 70, 30));
    cancel.setForeground(new Color(131, 131, 87));
    cancel.setBackground(new Color(223, 223, 191));
    cancel.setActionCommand("exit");
    cancel.setFont(new Font("Book Antiqua", 1, 14));

    this.getContentPane().add(header, null);
    this.getContentPane().add(cancel, null);
    this.getContentPane().add(login, null);
    this.getContentPane().add(passwd, null);
    this.getContentPane().add(user, null);
    this.getContentPane().add(password, null);
    this.getContentPane().add(username, null);

    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize  = this.getSize();

    header.setFont(new Font("Book Antiqua", 1, 11));
    user.setNextFocusableComponent(password);
    username.setBackground(new Color(240, 240, 230));

    cancel.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          System.exit(0);
        }
      });
    header.setForeground(new Color(223, 223, 191));
    this.setBackground(new Color(223, 223, 191));
    
    if(frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }

    if(frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    this.setLocation(
                     (screenSize.width - frameSize.width) / 2,
                     (screenSize.height - frameSize.height) / 2);
    this.setVisible(true);
  }

  /**
   * Main entry point for the admin utility of the VSM application.
   * @param args
   */
  public static void main(String[] args) {
    new Authentication();
  }  
}