/* 
 * This file is part of the Echo Web Application Framework (hereinafter "Echo").
 * Copyright (C) 2002-2009 NextApp, Inc.
 *
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 */

package nextapp.echo2.testapp.thousandmonkeys;

import nextapp.echo2.app.ApplicationInstance;
import nextapp.echo2.app.ContentPane;
import nextapp.echo2.app.TaskQueueHandle;
import nextapp.echo2.app.Window;
import nextapp.echo2.webcontainer.ContainerContext;

/**
 * Thousand Monkeys <code>ApplicationInstance</code> implementation.
 */
public class ThousandMonkeysApp extends ApplicationInstance {

    private int iteration;
    private TaskQueueHandle ghostTaskQueue;
    private Monkey monkey;
    
    /**
     * @see nextapp.echo2.app.ApplicationInstance#init()
     */
    public Window init() {
        Window window = new Window();
        window.setTitle("Thousand Monkeys (Start)");
        ContentPane contentPane = new ContentPane();
        window.setContent(contentPane);
        monkey = new Monkey(contentPane);
        startGhostTask();
        return window;
    }
    
    /**
     * Starts the ghost task queue that will push updates to client.
     */
    private void startGhostTask() {
        if (ghostTaskQueue != null) {
            return;
        }
        ghostTaskQueue = createTaskQueue();
        ContainerContext containerContext = 
                (ContainerContext) getContextProperty(ContainerContext.CONTEXT_PROPERTY_NAME);
        containerContext.setTaskQueueCallbackInterval(ghostTaskQueue, 0);
        GhostTask.start(this, ghostTaskQueue);
    }
    
    /**
     * Performs a single iteration.
     */
    void iterate() {
        monkey.iterate();
        getDefaultWindow().setTitle("Thousand Monkeys: Iteration #" + ++iteration);
    }
}