attachmentwebhandler.java

java servlet著名论坛源代码

/*
 * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/admin/AttachmentWebHandler.java,v 1.2 2004/01/18 19:13:10 minhnn Exp $
 * $Author: minhnn $
 * $Revision: 1.2 $
 * $Date: 2004/01/18 19:13:10 $
 *
 * ====================================================================
 *
 * 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.admin;

import java.util.Collection;
import java.util.Iterator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.mvnforum.auth.OnlineUserManager;
import com.mvnforum.common.AttachmentUtil;
import com.mvnforum.db.AttachmentBean;
import com.mvnforum.db.DAOFactory;
import net.myvietnam.mvncore.exception.DatabaseException;

class AttachmentWebHandler {

    private static Log log = LogFactory.getLog(AttachmentWebHandler.class);

    private OnlineUserManager userManager = OnlineUserManager.getInstance();

    AttachmentWebHandler() {
    }

    /**
     * NOTE: This method should be called before any attemp to delete a forum
     * because it require the forum is exited
     * After calling this method, go ahead and delete the forum
     */
    static void deleteAttachments_inForum(int forumID) throws DatabaseException {

        // First, try to delete attachment in database
        Collection attachmentBeans = DAOFactory.getAttachmentDAO().getBeans_inForum(forumID);

        log.info("Delete forum = " + forumID + " attachment count = " + attachmentBeans.size());

        //now delete files on disk
        for (Iterator iter = attachmentBeans.iterator(); iter.hasNext(); ) {
            AttachmentBean attachmentBean = (AttachmentBean)iter.next();
            int attachID = attachmentBean.getAttachID();

            //this method already catch the exception
            AttachmentUtil.deleteAttachFilenameOnDisk(attachID);

            try {
                DAOFactory.getAttachmentDAO().delete(attachID);
            } catch (Exception ex) {
                log.warn("Cannot delete attachment in database", ex);
            }
        }
    }

}