import it.sauronsoftware.junique.AlreadyLockedException; //导入依赖的package包/类
@Override
public void init() throws AlreadyLockedException, IOException {
  try {
    JUnique.acquireLock(getClass().getCanonicalName(), message -> {
      onOtherAppStart.run();
      return null;
    });
  } catch (AlreadyLockedException alreadyLockedException) {
    JUnique.sendMessage(getClass().getCanonicalName(), "alreadyRunning");
    throw alreadyLockedException;
  }

  // Set up the loggers
  setupLoggers();

  // Install SVG image loaders so SVGs can be used like any other image
  SvgImageLoaderFactory.install();

  // Search for and load themes from the custom theme directory before loading application preferences
  // This avoids an issue with attempting to load a theme at startup that hasn't yet been registered
  logger.finer("Registering custom user themes from external dir");
  Themes.getDefault().loadThemesFromDir();
}
 

import it.sauronsoftware.junique.AlreadyLockedException; //导入依赖的package包/类
@Override
public Object start(IApplicationContext appContext) throws Exception {

	try {
		lockApp();
	} catch (AlreadyLockedException e) {
		focusApp();
		
		return EXIT_OK;
	}

	assignPlatformLocation();
	
	try {
		return super.start(appContext);
	} finally {
		JUnique.releaseLock(MODELER_APPLICATION_ID);
	}
}
 

import it.sauronsoftware.junique.AlreadyLockedException; //导入依赖的package包/类
public static void main(String[] args) {
	boolean isRunning = false;
	Logger.EnableLogging();
	
	try
	{
		JUnique.acquireLock(name);
	}
	catch (AlreadyLockedException e)
	{
		isRunning = true;
	}
	
	if (!isRunning)
	{
     javax.swing.SwingUtilities.invokeLater(new Runnable() {
         public void run() {
             BVS gui = new BVS();
             gui.start();
         }
     });
	}
	else
	{
		Logger.LogError("There is already an instance of BVS running. Exiting.");
	}
}
 

import it.sauronsoftware.junique.AlreadyLockedException; //导入依赖的package包/类
@PostContextCreate
void postContextCreate(IApplicationContext context, Display display,
    final IEventBroker broker, final INxtService nxt, IWallet wallet,
    UISynchronize sync, IUserService userService, IDataProviderPool pool) {

  logger.info("LifeCycleManager.postContextCreate");

  String appId = "com.dgex.offspring.application.lifecycle.LifeCycleManager";
  boolean alreadyRunning;
  try {
    JUnique.acquireLock(appId);
    alreadyRunning = false;
  }
  catch (AlreadyLockedException e) {
    alreadyRunning = true;
  }
  if (alreadyRunning) {
    File home = new File(System.getProperty("user.home") + File.separator
        + ".junique");

    MessageDialog
        .openWarning(
            display.getActiveShell(),
            "Offspring Already Running",
            "Offspring is already running.\n\n"
                + "If you keep seeing this dialog close Offspring with your taskmanager.\n\n"
                + "Cannot find Offspring in your taskmanager?\n"
                + "Then delete this folder " + home.getAbsolutePath());
    System.exit(0);
    return;
  }

  context.applicationRunning();

  final LoginDialog loginDialog = new LoginDialog(Display.getCurrent()
      .getActiveShell(), wallet);
  loginDialog.setBlockOnOpen(true);

  if (loginDialog.open() != Window.OK)
    System.exit(0);

  /* Must re-initialize if user selected to use test net (write new config) */
  if (Config.nxtIsTestNet) {
    Config.initialize();
  }
}
 

import it.sauronsoftware.junique.AlreadyLockedException; //导入依赖的package包/类
private void lockApp() throws AlreadyLockedException {
	JUnique.acquireLock(MODELER_APPLICATION_ID, new FocusHandler());
}