Package org.onemind.swingweb.servlet

Source Code of org.onemind.swingweb.servlet.SwingWebShareAppServlet

/*
* Copyright (C) 2004 TiongHiang Lee
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not,  write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
* Email: thlee@onemindsoft.org
*/

package org.onemind.swingweb.servlet;

import java.awt.Window;
import java.util.logging.Logger;
import javax.servlet.http.*;
import org.onemind.awtbridge.BridgeContextSession;
import org.onemind.commons.java.lang.reflect.ReflectUtils;
import org.onemind.swingweb.*;
import org.onemind.swingweb.component.shareapp.ShareAppApplicationInitializer;
import org.onemind.swingweb.session.SwingWebSession;
/**
* A Servlet for initializing the swingweb application. There's only two parameter needed
* for the application: <br>
* <ul>
*     <li>app-class - the application class </li>
*     <li>swingweb-config - the swing web configuration </li>
* </ul>
*
* @author TiongHiang Lee (thlee@onemindsoft.org)
*
*/
public class SwingWebShareAppServlet extends AbstractSwingWebServlet
{

    /** the logger * */
    private static final Logger _logger = Logger.getLogger(SwingWebShareAppServlet.class.getName());

    /** the component manager **/
    private SwingWebComponentManager _sharedComponentManager = new SwingWebComponentManager();

    /** whether the application has been started (used in shareApp mode only) **/
    private boolean _appStarted = false;;

    /** the application window **/
    private Window _app;

    /**
     * {@inheritDoc}
     */
    protected SwingWebSession createSession(SwingWebContext context, HttpSession httpSession)
    {
        SwingWebSession session = new SwingWebSession(_sharedComponentManager);
        return session;
    }

    /**
     * {@inheritDoc}
     */
    protected void startApp(SwingWebSession swSession, HttpServletRequest req, HttpServletResponse resp) throws Exception
    {
        if (!_appStarted)
        {
            synchronized (getAppClass())
            {
                if (!_appStarted)
                {
                    _app = getManager().startApp(ReflectUtils.getClass(getAppClass()), null);
                    _appStarted = true;
                }
            }
        }
        if (_app instanceof ShareAppApplicationInitializer)
        {
            ((ShareAppApplicationInitializer) _app).sessionStartedForApplication(swSession);
        }
    }

    public void sessionEnded(BridgeContextSession session)
    {
        super.sessionEnded(session);
        if (_app instanceof ShareAppApplicationInitializer)
        {
            ((ShareAppApplicationInitializer) _app).sessionEndedForApplication((SwingWebSession) session);
        }
    }
}
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