Java tutorial
/******************************************************************************* * Copyright 2016 Gabriela D. A. Guardia * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ package frames; import java.awt.event.KeyEvent; import java.rmi.RemoteException; import java.util.concurrent.Semaphore; import javax.swing.JOptionPane; import juddi.JuddiRegistry; import org.apache.commons.configuration.ConfigurationException; import org.apache.juddi.v3.client.transport.TransportException; public class LoginFrame extends javax.swing.JFrame { private String email = ""; private Semaphore semaphore; //Creates new form LoginFrame public LoginFrame() { initComponents(); //Enable calling the clients System.setSecurityManager(null); //Create semaphore with a single permission semaphore = new Semaphore(1); //Centralizes frame setLocationRelativeTo(null); //Make Login frame visible setVisible(true); } //This method is called from within the constructor to initialize the form. @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents private void initComponents() { signInLabel = new javax.swing.JLabel(); emailLabel = new javax.swing.JLabel(); emailTextField = new javax.swing.JTextField(); incorrectLoginLabel = new javax.swing.JLabel(); loginButton = new javax.swing.JButton(); createAccountButton = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); signInLabel.setText("<html><b>Sign in</b></html>"); emailLabel.setText("e-mail:"); emailTextField.addKeyListener(new java.awt.event.KeyAdapter() { public void keyReleased(java.awt.event.KeyEvent evt) { emailTextFieldKeyReleased(evt); } }); incorrectLoginLabel.setText("<html><span style=\"color:red\">E-mail not registered</span></html>"); loginButton.setText("Login"); loginButton.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { loginButtonActionPerformed(evt); } }); createAccountButton.setText("Create New Publisher"); createAccountButton.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { createAccountButtonActionPerformed(evt); } }); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup( javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(createAccountButton)) .addGroup(layout.createSequentialGroup().addGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup().addContainerGap().addComponent( signInLabel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup().addGap(43, 43, 43) .addComponent(emailLabel) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout .createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addComponent(emailTextField, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(layout.createSequentialGroup() .addComponent(loginButton).addGap(4, 4, 4) .addComponent(incorrectLoginLabel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))) .addGap(0, 103, Short.MAX_VALUE))) .addContainerGap())); layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup().addContainerGap() .addComponent(signInLabel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(36, 36, 36) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(emailTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(emailLabel)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(loginButton).addComponent(incorrectLoginLabel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 87, Short.MAX_VALUE) .addComponent(createAccountButton).addContainerGap())); incorrectLoginLabel.setVisible(false); pack(); }// </editor-fold>//GEN-END:initComponents //When user press createAccountButton private void createAccountButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_createAccountButtonActionPerformed //Try to acquire permission if (semaphore.tryAcquire()) { //Create new CreatePublisher form new CreatePublisher(); //Destroy Login frame dispose(); } }//GEN-LAST:event_createAccountButtonActionPerformed private void emailTextFieldKeyReleased(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_emailTextFieldKeyReleased //Get email typed by user email = emailTextField.getText().trim(); //Verify if email field do not exceed 255 words (allowed into database) if (email.length() > 255) { email = email.substring(0, 255); emailTextField.setText(email); } //Enable/Disable loginButton if (!email.equals("")) loginButton.setEnabled(true); else loginButton.setEnabled(false); //If user press enter, click loginButton if (evt.getKeyCode() == KeyEvent.VK_ENTER) { loginButton.doClick(); } }//GEN-LAST:event_emailTextFieldKeyReleased private void loginButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_loginButtonActionPerformed //Try to acquire permission if (semaphore.tryAcquire()) { try { JuddiRegistry jr = new JuddiRegistry(); String authentication = jr.authenticate(email); //If user is authenticated if (authentication != null) { //Call MainFrame new MainFrame(jr); //Destroy LoginFrame dispose(); } //Else, if user is not authenticated else { //Show error message to user JOptionPane.showMessageDialog(rootPane, "Error to authenticate", "Error", JOptionPane.ERROR_MESSAGE); //Release semaphore semaphore.release(); } } catch (ConfigurationException | TransportException | RemoteException ex) { //Show error message to user JOptionPane.showMessageDialog(rootPane, "Error to authenticate", "Error", JOptionPane.ERROR_MESSAGE); //Release semaphore semaphore.release(); } } }//GEN-LAST:event_loginButtonActionPerformed //@param args the command line arguments public static void main(String args[]) { /* Set the Nimbus look and feel */ //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(LoginFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold> /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new LoginFrame(); } }); } // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JButton createAccountButton; private javax.swing.JLabel emailLabel; private javax.swing.JTextField emailTextField; private javax.swing.JLabel incorrectLoginLabel; private javax.swing.JButton loginButton; private javax.swing.JLabel signInLabel; // End of variables declaration//GEN-END:variables }