booktitleclient.java

java web services how to program

// Fig. 7.14: BookTitleClient.java.
// BookTitleClient uses the WASP API for Java to access the 
// Book Title Web service.
package com.deitel.jws1.wsdl.client;

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

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

// WASP packages
import org.idoox.webservice.client.WebServiceLookup;
import org.idoox.webservice.client.WebServiceLookupException;
import org.idoox.wasp.Context;

// Deitel packages
import com.deitel.jws1.services.BookTitle;

public class BookTitleClient extends JFrame {

   private final static int FRAME_WIDTH = 500;
   private final static int FRAME_HEIGHT = 100;

   // interface through which to invoke Book Title Web service
   private BookTitle service;

   // Web-service URL
   private final static String SERVICE_URL =
      "http://SCARAB:6060/BookTitleService/";

   // WSDL-document URL
   private final static String WSDL_URL =
      "http://SCARAB:6060/BookTitleService/";

   public BookTitleClient( String title )
   {
      super( title );
      getContentPane().setLayout( new GridLayout( 2, 2 ) );

      // JLabel to display book title from Web-service invocation
      final JLabel resultsLabel = new JLabel();

      // JComboBox for selecting ISBN to send to Web service
      final JComboBox isbnComboBox = new JComboBox();
      isbnComboBox.addItem( "0130895601" );
      isbnComboBox.addItem( "0130895717" );
      isbnComboBox.addItem( "0130293636" );
      isbnComboBox.addItem( "0130284173" );
      isbnComboBox.addItem( "0130923613" );

      // JButton invokes remote Web Service
      JButton serviceButton = new JButton( "Get Book Title" );
      serviceButton.addActionListener(
         new ActionListener() {

            // invoked when user presses JButton
            public void actionPerformed( ActionEvent event )
            {
               // use WASP APIs to access Web service
               try {

                  // get object that performs Web-service lookup
                  WebServiceLookup serviceLookup = 
                     ( WebServiceLookup ) Context.getInstance( 
                        Context.WEBSERVICE_LOOKUP );

                  // lookup Web service from registry
                  service = ( BookTitle ) serviceLookup.lookup( 
                     WSDL_URL, BookTitle.class, SERVICE_URL );

                  // invoke Web service
                  String response = service.getBookTitle( 
                     ( String ) isbnComboBox.getSelectedItem() );

                  resultsLabel.setText( response );
               }

               // handle exception if unable to find Web service
               catch ( WebServiceLookupException exception ) {
                  exception.printStackTrace();
               }

            } // end method actionPerformed
         }
      );

      // store JLabel, JComboBox and JButton JFrame
      getContentPane().add( new JLabel( "Select ISBN:" ) );
      getContentPane().add( isbnComboBox );
      getContentPane().add( resultsLabel );
      getContentPane().add( serviceButton );

   } // end constructor

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

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

} // end class BookTitleClient