showlasttopicsfeedaction.java

来自「jGossip是一个简单而功能强大的Java论坛软件（消息板）」· Java 代码 · 共 153 行

/*
 * $$Id: ShowLastTopicsFeedAction.java,v 1.7 2004/05/31 07:51:23 bel70 Exp $$
 *
 * ***** BEGIN LICENSE BLOCK *****
 * 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.
 *
 * The Original Code is JGossip forum code.
 *
 * The Initial Developer of the Original Code is the JResearch, Org.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *              Dmitry Belov <[e-mail]>
 *
 * ***** END LICENSE BLOCK ***** */
/*
 * Created on Jul 13, 2003
 *
 */
package org.jresearch.gossip.actions.rss;

import java.sql.SQLException;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sql.DataSource;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.jresearch.gossip.IConst;
import org.jresearch.gossip.beans.forum.Forum;
import org.jresearch.gossip.beans.user.User;
import org.jresearch.gossip.configuration.Configurator;
import org.jresearch.gossip.dao.ForumDAO;
import org.jresearch.gossip.exception.SystemException;
import org.jresearch.gossip.forms.ProcessForumForm;


/**
 * DOCUMENT ME!
 *
 * @author Bel
 */
public class ShowLastTopicsFeedAction extends Action {

    public static StringBuffer siteUrl;
    private User rssReader = new User();

    /**
     * DOCUMENT ME!
     *
     * @param request DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     */
    public DataSource getDataSource(HttpServletRequest request) {
        return (DataSource) request.getSession().getServletContext()
                                   .getAttribute(IConst.CONTEXT.DS_KEY);
    }

    /**
     * DOCUMENT ME!
     *
     * @param mapping DOCUMENT ME!
     * @param form DOCUMENT ME!
     * @param request DOCUMENT ME!
     * @param response DOCUMENT ME!
     *
     * @return DOCUMENT ME!
     *
     * @throws Exception DOCUMENT ME!
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
        HttpServletRequest request, HttpServletResponse response)
        throws Exception {
        HttpSession session = request.getSession();
        String forward = "rss_main_page";

        if (siteUrl == null) {
            siteUrl = new StringBuffer();
            siteUrl.append(request.getServerName());
            siteUrl.append(":");
            siteUrl.append(request.getServerPort());
            siteUrl.append(request.getContextPath());
            siteUrl.append(Configurator.getInstance().get(IConst.CONFIG.MODULE_PREFIX));
            siteUrl.append("/");
        }

        request.setAttribute(IConst.REQUEST.SITE_URL, siteUrl.toString());

        ForumDAO dao = ForumDAO.getInstance();

        Calendar cl = Calendar.getInstance();
        cl.setTime(new Date());
        cl.add(Calendar.DATE,
            -1 * Integer.parseInt(Configurator.getInstance().get(IConst.CONFIG.RSS_PERIOD)));
        rssReader.setIntime(cl.getTime());
        getServlet().log("ShowLastThreadsAction: try to show LastThreads RSS Feed");

        String fid = ((ProcessForumForm) form).getFid();

        try {
            dao.setDataSource(getDataSource(request));

            List recordsData = null;

            //TODO cache
            if (fid==null||fid.equals("")) {
                recordsData = dao.getLastTopics(Integer.parseInt(
                            Configurator.getInstance().get(IConst.CONFIG.RSS_MAX_ITEM_COUNT)),
                        cl.getTime());
            } else {
                int id = Integer.parseInt(fid);
                recordsData = dao.getLastTopics(id,
                        Integer.parseInt(Configurator.getInstance().get(IConst.CONFIG.RSS_MAX_ITEM_COUNT)),
                        cl.getTime());

                Forum currForum = dao.getForumInfo(id);
                currForum.setForumid(id);
                request.setAttribute(IConst.REQUEST.CURR_FORUM, currForum);
                forward = "rss_forum_page";
            }

            //TODO - set pubDate
            request.setAttribute(IConst.REQUEST.RSS_PUB_DATE, new Date());
            getServlet().log("ShowLastThreadsAction: " + recordsData.size() +
                " topic(s) since " + cl.getTime() + " has been found, fid=" +
                fid);
            request.setAttribute(IConst.REQUEST.RECORDS_DATA, recordsData);
        } catch (SQLException sqle) {
            getServlet().log("Connection.process", sqle);
            throw new SystemException(sqle);
        }

        return (mapping.findForward(forward));
    }
}