001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.servlet.filters.sessionmaxallowed;
016    
017    import com.liferay.portal.kernel.servlet.TryFinallyFilter;
018    import com.liferay.portal.servlet.filters.BasePortalFilter;
019    import com.liferay.portal.util.PropsValues;
020    import com.liferay.portal.util.WebKeys;
021    
022    import javax.servlet.http.HttpServletRequest;
023    import javax.servlet.http.HttpServletResponse;
024    import javax.servlet.http.HttpSession;
025    
026    /**
027     * @author Brian Wing Shun Chan
028     */
029    public class SessionMaxAllowedFilter
030            extends BasePortalFilter implements TryFinallyFilter {
031    
032            public void doFilterFinally(
033                    HttpServletRequest request, HttpServletResponse response,
034                    Object ojbect) {
035    
036                    if (PropsValues.SESSION_MAX_ALLOWED > 0) {
037                            HttpSession session = request.getSession();
038    
039                            Boolean sessionMaxAllowed = (Boolean)session.getAttribute(
040                                    WebKeys.SESSION_MAX_ALLOWED);
041    
042                            if ((sessionMaxAllowed != null) && sessionMaxAllowed) {
043                                    session.invalidate();
044                            }
045                    }
046            }
047    
048            public Object doFilterTry(
049                    HttpServletRequest request, HttpServletResponse response) {
050    
051                    return null;
052            }
053    
054    }