fortunemanager.java

Java的面向对象数据库系统的源代码

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// Copyright (C) 1997-@year@ by Per Nyfelt. All rights reserved.
//
// $Id: FortuneManager.java,v 1.2 2003/11/29 16:19:28 per_nyfelt Exp $
package client;

import java.awt.*;
import java.awt.event.*;
import java.util.Properties;
import java.rmi.RemoteException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import javax.swing.*;

import ejb.Greeter;
import ejb.GreeterHome;

/**
 *
 * <br> Date: Sep 12, 2002
 * @author Per Nyfelt
 */
public class FortuneManager extends JFrame {

    private JTextArea outPutArea;
    private JButton addFortuneButton;
    private JTextField addFortuneTF;
    private JButton showFortuneButton;
    private JButton showAllFortunesButton;
    private JButton resetFortunesButton;
    private Greeter greeter;

    public FortuneManager() {
        initGUI();
        initServerObjects();
    }

    private void initServerObjects() {
        try {
            Properties props = new Properties();
            props.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
            props.setProperty(Context.PROVIDER_URL, "localhost:1099");
            Context ctx = new InitialContext(props);
            Object ref = ctx.lookup("Greeter");
            GreeterHome home = (GreeterHome) PortableRemoteObject.narrow(ref, GreeterHome.class);
            greeter = home.create();
        } catch (Exception e) {
            e.printStackTrace();
            outPutArea.setText(e.toString());
        }
    }

    private void initGUI() {
        this.setTitle("Fortune Manager");
        Container container = this.getContentPane();
        container.setLayout(new BorderLayout());

        container.add(inputPanel(), BorderLayout.NORTH);
        container.add(outputPanel(), BorderLayout.CENTER);
        container.add(actionPanel(), BorderLayout.SOUTH);

        this.addWindowListener(new WindowCloser());
    }

    private JPanel inputPanel() {
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.anchor = GridBagConstraints.WEST;
        gbc.insets = new Insets(25, 15, 5, 5);

        gbc.gridy = 0;
        panel.add(addFortuneTF = new JTextField(30), gbc);
        panel.add(addFortuneButton = new JButton("Add fortune"), gbc);
        addFortuneButton.addActionListener(new AddFortuneAction());

        return panel;
    }

    private JPanel actionPanel() {
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(5, 5, 5, 5);

        panel.add(showFortuneButton = new JButton("Show fortune"), gbc);
        panel.add(showAllFortunesButton = new JButton("Show all fortunes"), gbc);
        panel.add(resetFortunesButton = new JButton("Reset fortunes"), gbc);
        showFortuneButton.addActionListener(new ShowFortuneAction());
        showAllFortunesButton.addActionListener(new ShowAllFortunesAction());
        resetFortunesButton.addActionListener(new ResetFortunesAction());
        return panel;
    }

    private JPanel outputPanel() {
        JPanel panel = new JPanel();
        JScrollPane scrollPane = new JScrollPane(outPutArea = new JTextArea(20, 52));
        panel.add(scrollPane);
        return panel;
    }

    private class AddFortuneAction implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            outPutArea.append("\nAdding Fortune...\n");
            try {
                greeter.addGreeting(addFortuneTF.getText());
            } catch (RemoteException e1) {
                e1.printStackTrace();
            }
        }
    }

    private class ShowFortuneAction implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            outPutArea.append("\n");
            try {
                outPutArea.append(greeter.getGreeting());
            } catch (RemoteException e1) {
                e1.printStackTrace();
            }
        }
    }

    private class ShowAllFortunesAction implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            outPutArea.append("\n");
            try {
                outPutArea.append(greeter.getAllGreetings().toString());
            } catch (RemoteException e1) {
                e1.printStackTrace();
            }
        }
    }

    private class ResetFortunesAction implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            try {
                greeter.removeAllGreetings();
                outPutArea.setText("");
            } catch (RemoteException e1) {
                e1.printStackTrace();
            }
        }
    }

    private class WindowCloser extends WindowAdapter {

        public void windowClosing(WindowEvent e) {
            setVisible(false);
            dispose();
            System.exit(0);
        }
    }

    public static void main(String[] args) {
        FortuneManager fortuneManager = new FortuneManager();
        fortuneManager.setSize(600, 500);
        fortuneManager.setLocation(100, 100);
        fortuneManager.setVisible(true);
    }

}