org.eneuwirt.MyVaadinApplication.java Source code

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Here is the source code for org.eneuwirt.MyVaadinApplication.java

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/*
 * Copyright 2009 IT Mill Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.eneuwirt;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;

import com.vaadin.Application;
import com.vaadin.service.ApplicationContext;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Window;

/**
 * The Application's "main" class
 */
public class MyVaadinApplication extends Application implements ApplicationContext.TransactionListener {
    private static final long serialVersionUID = 1L;
    private static ThreadLocal<MyVaadinApplication> currentApplication = new ThreadLocal<MyVaadinApplication>();
    private Window mainWindow;

    public Window getMainWindow() {
        return mainWindow;
    }

    @Override
    public void init() {
        this.getContext().addTransactionListener(this);

        this.mainWindow = new Window("My Vaadin Application");

        this.setMainWindow(mainWindow);

        mainWindow.setContent(new LoginScreen(this));
    }

    public void login(String username, String password) {
        UsernamePasswordToken token;

        token = new UsernamePasswordToken(username, password);
        // ?Remember Me? built-in, just do this:
        token.setRememberMe(true);

        // With most of Shiro, you'll always want to make sure you're working with the currently executing user,
        // referred to as the subject
        Subject currentUser = SecurityUtils.getSubject();

        // Authenticate
        currentUser.login(token);
    }

    public void logout() {
        getMainWindow().getApplication().close();

        Subject currentUser = SecurityUtils.getSubject();

        if (currentUser.isAuthenticated()) {
            currentUser.logout();
        }
    }

    public static MyVaadinApplication getInstance() {
        return MyVaadinApplication.currentApplication.get();
    }

    @Override
    public void transactionStart(Application application, Object transactionData) {
        if (application == MyVaadinApplication.this) {
            MyVaadinApplication.currentApplication.set(this);
        }
    }

    @Override
    public void transactionEnd(Application application, Object transactionData) {
        if (application == MyVaadinApplication.this) {
            MyVaadinApplication.currentApplication.set(null);

            MyVaadinApplication.currentApplication.remove();
        }
    }

    // Logout Listener is defined for the application
    public static class LogoutListener implements Button.ClickListener {
        private static final long serialVersionUID = 1L;
        private MyVaadinApplication app;

        public LogoutListener(MyVaadinApplication app) {
            this.app = app;
        }

        @Override
        public void buttonClick(ClickEvent event) {
            this.app.logout();
        }
    }
}