forumwebhandler.java

java servlet著名论坛源代码

/*
 * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/user/ForumWebHandler.java,v 1.15 2004/05/19 19:11:59 minhnn Exp $
 * $Author: minhnn $
 * $Revision: 1.15 $
 * $Date: 2004/05/19 19:11:59 $
 *
 * ====================================================================
 *
 * Copyright (C) 2002-2004 by MyVietnam.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * All copyright notices regarding mvnForum MUST remain intact
 * in the scripts and in the outputted HTML.
 * The "powered by" text/logo with a link back to
 * http://www.mvnForum.com and http://www.MyVietnam.net in the
 * footer of the pages MUST remain visible when the pages
 * are viewed on the internet or intranet.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Support can be obtained from support forums at:
 * http://www.mvnForum.com/mvnforum/index
 *
 * Correspondence and Marketing Questions can be sent to:
 * [e-mail]
 *
 * @author: Minh Nguyen  [e-mail]
 * @author: Mai  Nguyen  [e-mail]
 */
package com.mvnforum.user;

import java.util.*;
import javax.servlet.http.HttpServletRequest;

import com.mvnforum.auth.*;
import com.mvnforum.db.*;
import net.myvietnam.mvncore.exception.*;

public class ForumWebHandler {

    private OnlineUserManager userManager = OnlineUserManager.getInstance();

    public ForumWebHandler() {
    }

    public void prepareList(HttpServletRequest request, String requestURI)
        throws AssertionException, DatabaseException, AuthenticationException, MissingURLMapEntryException {

        int numberOfThreads = DAOFactory.getThreadDAO().getNumberOfEnableBeans();
        int numberOfPosts = DAOFactory.getPostDAO().getNumberOfEnablePosts() - DAOFactory.getThreadDAO().getNumberOfDisableBeans();
        int numberOfMembers = DAOFactory.getMemberDAO().getNumberOfMembers();
        Collection memberBeans = DAOFactory.getMemberDAO().getMembers_withSortSupport_limit(0, 1, "MemberID", "DESC");
        if (memberBeans.size() != 1) {
            throw new AssertionException("Assertion: MemberBeans size == 1 (but the value = " + memberBeans.size() + ")");
        }
        MemberBean memberBean = (MemberBean)memberBeans.iterator().next();

        // the following 2 lines fix the bug that no online user found in the first time request
        userManager.getOnlineUser(request);
        Action action = new ActionInUserModule(request, requestURI); // may throw MissingURLMapEntryException
        userManager.updateOnlineUserAction(request, action);
        // now set the attribute
        request.setAttribute("OnlineUserActions",userManager.getOnlineUserActions(0 /*default*/)); // no permission

        request.setAttribute("NumberOfThreads", new Integer(numberOfThreads));
        request.setAttribute("NumberOfPosts", new Integer(numberOfPosts));
        request.setAttribute("MemberBean", memberBean);
        request.setAttribute("NumberOfMembers", new Integer(numberOfMembers));

    }

    public void prepareListIndex(HttpServletRequest request, String requestURI)
        throws AssertionException, DatabaseException, AuthenticationException,
        MissingURLMapEntryException, ObjectNotFoundException {

        int numberOfThreads = DAOFactory.getThreadDAO().getNumberOfEnableBeans();
        int numberOfPosts = DAOFactory.getPostDAO().getNumberOfEnablePosts() - DAOFactory.getThreadDAO().getNumberOfDisableBeans();

        int numberOfMembers = DAOFactory.getMemberDAO().getNumberOfMembers();
        Collection memberBeans = DAOFactory.getMemberDAO().getMembers_withSortSupport_limit(0, 1, "MemberID", "DESC");
        if (memberBeans.size() != 1) {
            throw new AssertionException("Assertion: MemberBeans size == 1 (but the value = " + memberBeans.size() + ")");
        }
        MemberBean memberBean = (MemberBean) memberBeans.iterator().next();

        // the following 2 lines fix the bug that no online user found in the first time request
        userManager.getOnlineUser(request);
        Action action = new ActionInUserModule(request, requestURI); // may throw MissingURLMapEntryException
        userManager.updateOnlineUserAction(request, action);

        ForumCache forumCache = ForumCache.getInstance();
        Collection forumBeans = forumCache.getBeans();
        Collection cTotal = new ArrayList();

        for (Iterator forumIterator = forumBeans.iterator(); forumIterator.hasNext(); ) {
            ForumBean forumBean = (ForumBean) forumIterator.next();

            Collection cThreadTemp = DAOFactory.getThreadDAO().getEnableBeans_inForum_withSortSupport_limit(forumBean.getForumID(), 0, 1, "ThreadLastPostDate", "DESC");
            if (cThreadTemp.size() == 0) {
                continue;
            } else if (cThreadTemp.size() > 1) {
                throw new AssertionException("Assertion: ThreadBeans size <= 1 (but the value = " + cThreadTemp.size() + ")");
            }
            ThreadBean threadBean = (ThreadBean) (cThreadTemp.iterator().next());

            Collection cPostTemp = DAOFactory.getPostDAO().getLastEnablePosts_inThread_limit(threadBean.getThreadID(), 1);
            if (cPostTemp.size() != 1) {
                throw new AssertionException("Assertion: PostBeans size == 1 (but the value = " + cPostTemp.size() + ")");
            }
            PostBean postBean = (PostBean) (cPostTemp.iterator().next());

            Collection cGeneralInfo = new ArrayList(2);
            cGeneralInfo.add(postBean);
            cGeneralInfo.add(threadBean);
            cTotal.add(cGeneralInfo);
        }

        // now set the attribute
        request.setAttribute("OnlineUserActions", userManager.getOnlineUserActions(0 /*default*/)); // no permission
        request.setAttribute("LastPosts", cTotal);
        request.setAttribute("NumberOfThreads", new Integer(numberOfThreads));
        request.setAttribute("NumberOfPosts", new Integer(numberOfPosts));
        request.setAttribute("MemberBean", memberBean);
        request.setAttribute("NumberOfMembers", new Integer(numberOfMembers));
    }

}