de.informera.dev.nutchManager.MyVaadinApplication.java Source code

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Here is the source code for de.informera.dev.nutchManager.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 de.informera.dev.nutchManager;

import java.io.File;

import com.vaadin.Application;
import com.vaadin.terminal.ThemeResource;
import com.vaadin.ui.Embedded;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.MenuBar;
import com.vaadin.ui.MenuBar.MenuItem;
import com.vaadin.ui.Window;
import com.vaadin.ui.Window.Notification;

import de.informera.dev.nutchManager.sysGui.AddInstanceDialog;

/**
 * The Application's "main" class
 */
@SuppressWarnings("serial")
public class MyVaadinApplication extends Application {
    private Window window;

    @Override
    public void init() {
        File settings_folder = new File(System.getProperty("user.home") + "/.nutchManager");
        if (!settings_folder.isDirectory()) {
            settings_folder.mkdir();
            new File(settings_folder.getAbsolutePath() + "/backups").mkdir();
            new File(settings_folder.getAbsolutePath() + "/instances").mkdir();
        }

        window = new Window("nutchManager");
        setMainWindow(window);
        this.setTheme("nutchManager");

        final HorizontalLayout technologies = new HorizontalLayout();
        technologies.setSpacing(true);
        technologies.addComponent(new Embedded("", new ThemeResource("images/nutch_logo_tm.gif")));
        technologies.addComponent(new Embedded("", new ThemeResource("images/vaadin.png")));

        final MenuBar mainMenu = new MenuBar();

        mainMenu.setWidth("100%");
        MenuItem menuFile = mainMenu.addItem("File", null, null);
        MenuItem subMenuFile = menuFile.addItem("Add new instance", null, null);

        // Define a common menu command for all the menu items.
        MenuBar.Command addNewInstanceFromMenu = new MenuBar.Command() {
            public void menuSelected(MenuItem selectedItem) {
                window.removeAllComponents();
                window.addComponent(technologies);
                window.addComponent(mainMenu);
                window.addWindow(new AddInstanceDialog());
            }
        };

        subMenuFile.setCommand(addNewInstanceFromMenu);

        window.addComponent(technologies);

        window.addComponent(mainMenu);

        // Begin the checkout of an old configuration
        // Check waether configuration has entries for nutch instances or not
        //      File settings_folder = new File( this.getClass().getClassLoader().getResource("/instance_conf").getPath() );

        File instances_folder = new File(settings_folder + "/instances");

        // If not: prompt to add an instance
        if (instances_folder.list().length < 1) {
            window.showNotification("ERROR", "No previous configuration found. Please add a nutch instance.",
                    Notification.TYPE_ERROR_MESSAGE);
            Window addInstance = new AddInstanceDialog();
            window.addWindow(addInstance);
        } else {
            window.addComponent(new InstanceSelectionView());
        }

    }

}