standaloneclient.java

java web services how to program

// Fig. 11.6: StandaloneClient.java
// StandaloneClient is a standalone JAXM application that
// uses BookTitlesProxy to invoke the Book Titles Web service.
package com.deitel.jws1.jaxm.client;

// Java core packages
import java.awt.*;
import java.awt.event.*;

// Java extension packages
import javax.swing.*;

// initialize GUI for StandaloneClient
public class StandaloneClient extends JFrame {

   private final static int FRAME_WIDTH = 450;
   private final static int FRAME_HEIGHT = 300;

   public StandaloneClient( String title )
   {
      super( title );

      // JList to display results from Web-service invocation
      final JList resultsList = new JList();
      resultsList.setSelectionMode( 
         ListSelectionModel.SINGLE_SELECTION );

      // JButton invokes remote Web service
      JButton serviceButton = new JButton( "Invoke Service" );
      serviceButton.addActionListener(
         new ActionListener() {

            // invoked when user presses JButton
            public void actionPerformed( ActionEvent event )
            {
               // invoke Web service and store results in JList
               try {

                  // invoke Web service via BookTitlesProxy
                  BookTitlesProxy service = 
                     new BookTitlesProxy();
                  String response[] = service.getBookTitles();

                  // store results in JList
                  resultsList.setListData( response );
               }

               // handle exception in Web-service invocation
               catch ( java.io.IOException exception ) {
                  exception.printStackTrace();
               }
            }
         }
      );

      // store JButton on JPanel
      JPanel userPanel = new JPanel();
      userPanel.add( serviceButton );

      // add JList and JPanel to GUI
      getContentPane().add( new JScrollPane( resultsList ) );
      getContentPane().add( userPanel, BorderLayout.SOUTH );

   } // end constructor

   // return size of StandaloneClient frame
   public Dimension getPreferredSize()
   {
      return new Dimension( FRAME_WIDTH, FRAME_HEIGHT );
   }

   // instantiate StandaloneClient GUI
   public static void main( String args[] )
   {
      StandaloneClient client = 
         new StandaloneClient( "Book Title Service" );
      client.setDefaultCloseOperation( EXIT_ON_CLOSE );
      client.pack();
      client.setVisible( true );
   }

} // end class StandaloneClient