// gracefull shutdown
public void shutdown() {
Utils.logMessage(this, Severity.WARN, "system shutdown requested.");
try {
connPool.closeAllConnections();
} catch (SQLException e) {
Utils.logMessage(this, Severity.ERROR, "sql error returned from pool : " + e.getMessage());
}
Utils.logMessage(this, Severity.INFO, "system gracefully shutdown.");
System.exit(0);
}
// private c'tor 'hides' the public default one. CouponSystem is a singleton
private CouponSystemJFrame() {
// load sys params from properties file
Utils.logMessage(this, Severity.INFO, "Coupon system created.");
// NOT IN USE in a web-coupon system. ( see method doc )
// Utils.sysparam already set by a LoaderServlet
//
// Utils.loadSystemParameters();
sysParams = Utils.getSystemParameters();
_systemName = sysParams.get("SYSTEM_NAME");
_adminHash = sysParams.get("ADMIN_HASH");
_lookAndFeelTemplate = sysParams.get("LOOK_AND_FEEL_TEMPLATE");
_threadEnabled = Boolean.parseBoolean(sysParams.get("THREAD_ENABLED"));
_threadIntervalMinutes = Integer.parseInt(sysParams.get("THREAD_INTERVAL_MINUTES"));
_loggingEnabled = Boolean.parseBoolean(sysParams.get("LOGGING_ENABLED"));
Utils.setLoggingEnabled(_loggingEnabled);
Utils.logMessage(
this, Severity.DEBUG, "hashmap assigned to local vars, configuration applied.");
setTitle("Coupon System : " + _systemName);
setResizable(false);
try {
UIManager.setLookAndFeel(_lookAndFeelTemplate);
} catch (ClassNotFoundException
| InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e) {
Utils.logMessage(this, Severity.PANIC, "cannot load LookAndFeel template. exiting...");
e.printStackTrace();
// System.exit(0);
}
// load this JFrame only after initialization from properties file.
this.setVisible(true);
// Main app CANNOT be closed with 'x' , must press on the 'shutdown'
// buttong for gracefull shutdown.
setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
setBounds(100, 100, 785, 380);
contentPane = new JPanel();
contentPane.setLayout(null);
setContentPane(contentPane);
btnLogin = new JButton("Login");
btnLogin.addActionListener(this);
btnLogin.setBounds(659, 253, 98, 79);
contentPane.add(btnLogin);
listSysParams = new JList<Entry<String, String>>();
listSysParams.setBorder(new LineBorder(new Color(0, 0, 0)));
listSysParams.setFont(new Font("Consolas", Font.PLAIN, 14));
listSysParams.setEnabled(false);
listSysParams.setBounds(20, 11, 737, 219);
contentPane.add(listSysParams);
// a model is needed for JTable
DefaultListModel<Entry<String, String>> model = new DefaultListModel<Entry<String, String>>();
listSysParams.setModel(model);
JPanel panelSystem = new JPanel();
panelSystem.setBorder(new LineBorder(new Color(0, 0, 0)));
panelSystem.setLayout(null);
panelSystem.setBounds(20, 253, 428, 79);
contentPane.add(panelSystem);
btnShutdown = new JButton("Shutdown system");
btnShutdown.setForeground(Color.RED);
btnShutdown.setBounds(20, 36, 181, 23);
panelSystem.add(btnShutdown);
btnThread = new JButton("Stop cleaner thread");
btnThread.addActionListener(this);
btnThread.setForeground(Color.RED);
btnThread.setBounds(224, 36, 181, 23);
panelSystem.add(btnThread);
JLabel lblSys =
new JLabel(
"Coupon system running on : "
+ System.getProperty("os.name")
+ " / [version-"
+ System.getProperty("os.version")
+ "].");
lblSys.setBounds(20, 11, 369, 14);
panelSystem.add(lblSys);
btnShutdown.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
// calling for gracefull shutdown
shutdown();
}
});
// get a Set of Entries from all KVP in Map
Set<Entry<String, String>> entries = sysParams.entrySet();
for (Entry<String, String> entry : entries) {
model.addElement(entry);
}
// get/create the connection pool
connPool = ConnPool.getInstance();
// pass it to DAO's
createDAOs(connPool);
if (_threadEnabled) {
// start the daily cleaner thread
startTimer();
}
}