Package com.liusoft.dlog4j.dao

Source Code of com.liusoft.dlog4j.dao.MessageDAO

/*
*  MessageDAO.java
*  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
*  (at your option) any later version.
*
*  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 Library 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.
*  Author: Winter Lau (javayou@gmail.com)
*  http://dlog4j.sourceforge.net
*/
package com.liusoft.dlog4j.dao;

import java.sql.Timestamp;
import java.util.Date;
import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;

import com.liusoft.dlog4j.beans.MessageBean;
import com.liusoft.dlog4j.beans.UserBean;

/**
* վ�ڶ���Ϣ֮���ݿ���ʽӿ�
* @author Winter Lau
*/
public class MessageDAO extends DAO {

  /**
   * Ⱥ������
   * @param club
   * @param only_admin
   * @param content
   * @param sender
   */
  public static void SendMsgs(List users, String content, UserBean sender){
    try{
      //������Ϣbean
      MessageBean msg = new MessageBean();
      msg.setContent(content);
      msg.setSendTime(new Date());
      msg.setFromUser(sender);
      msg.setStatus(MessageBean.STATUS_NEW);
      //����д�����ݿ�
      Session ssn = getSession();
      beginTransaction();
      for(int i=0;i<users.size();i++){
        UserBean user = (UserBean)users.get(i);
        msg.setToUser(user);
        ssn.save(msg);
        if(i % 20 == 0){
          ssn.flush();
          ssn.clear();
        }
      }
      commit();
    }catch(HibernateException e){
      rollback();
    }
  }
 
  /**
   * �ظ���ɾ�����ظ��Ķ���Ϣ
   * @param old_msg_id
   * @param msg
   */
  public static void replyAndDeleteMessage(int old_msg_id, MessageBean msg){
    try{
      Session ssn = getSession();
      beginTransaction();
      //�ظ�����Ϣ
      ssn.save(msg);
      //ɾ�����ظ��Ķ���Ϣ
      if(old_msg_id > 0)
        executeNamedUpdate("DELETE_MESSAGE", old_msg_id, msg.getFromUser().getId());
      commit();
    }catch(HibernateException e){
      rollback();
    }
  }
 
  /**
   * �Ķ�������Ϣ
   * @param msg
   */
  public static void readMsg(MessageBean msg){
    if(msg != null){
      commitNamedUpdate("READ_ONE_MESSAGE", new Object[]{MessageBean.I_STATUS_READ,
          new Date(), new Integer(msg.getId()), MessageBean.I_STATUS_NEW});
    }
  }
 
  /**
   * �����¶���Ϣ״̬Ϊ�Ѷ�
   * @param userid
   * @return
   */
  public static int readNewMsgs(int userid) {
    return commitNamedUpdate("READ_MESSAGE", new Object[] {
        MessageBean.I_STATUS_READ,
        new Timestamp(System.currentTimeMillis()), new Integer(userid),
        MessageBean.I_STATUS_NEW });
  }
 
  /**
   * ��ȡ����Ϣ
   * @param msg_id
   * @return
   */
  public static MessageBean getMsg(int msg_id) {
    if(msg_id < 0)
      return null;
    return (MessageBean)getBean(MessageBean.class, msg_id);
  }
 
  /**
   * �ж��Ƿ����¶���Ϣ
   * @param userid
   * @return
   */
  public static boolean hasNewMessage(int userid){
    return getNewMessageCount(userid)>0;
  }
 
  /**
   * ����ij���û����¶���Ϣ��(δ������Ϣ)
   * @param userid
   * @return
   */
  public static int getNewMessageCount(int userid) {
    return executeNamedStatAsInt("NEW_MESSAGE_COUNT_OF_STATUS",
        new Object[] { new Integer(userid), MessageBean.I_STATUS_NEW,
            new Date() });
  }

  /**
   * ����ij���û��Ķ���Ϣ��
   * @param userid
   * @return
   */
  public static int getMessageCount(int userid){
    return executeNamedStatAsInt("MESSAGE_COUNT", userid, MessageBean.STATUS_DELETED);
  }
 
  /**
   * �г�ij���û����յ��Ķ���Ϣ
   * @param userid
   * @param fromId
   * @param count
   * @return
   */
  public static List listMsgs(int userid, int fromIdx, int count){
    return executeNamedQuery("LIST_MESSAGE", fromIdx, count, userid);
  }
 
  /**
   * ɾ��ij�����Ϣ
   * @param userid
   * @param status
   * @param commit
   * @return
   * @throws SQLException
   */
  public static int deleteMsgs(int userid, int status){
    return commitNamedUpdate("DELETE_MESSAGE_BY_STATUS", userid, status);
  }
 
  /**
   * ɾ��ij������Ϣ
   * @param userid
   * @param msgid
   * @param commit
   * @return
   */
  public static int deleteMsg(int userid, int msgid){
    return commitNamedUpdate("DELETE_MESSAGE", msgid, userid);
  }

  /**
   * ɾ��ijЩ����Ϣ
   * @param ownerId
   * @param friendId
   */
  public static int deleteMsgs(int ownerId, String[] msgIds){
    if(msgIds == null|| msgIds.length == 0)
      return 0;
    //һ�����ɾ����ʮ��
    int max_msg_count = Math.min(msgIds.length, 50);
    StringBuffer hql = new StringBuffer("DELETE FROM MessageBean AS f WHERE f.toUser.id=? AND f.id IN (");
    for(int i=0;i<max_msg_count;i++){
      hql.append("?,");
    }
    hql.append("?)");
    Session ssn = getSession();
    try{
      beginTransaction();
      Query q = ssn.createQuery(hql.toString());
      q.setInteger(0, ownerId);
      int i=0;
      for(;i<max_msg_count;i++){
        String s_id = (String)msgIds[i];
        int id = -1;
        try{
          id = Integer.parseInt(s_id);
        }catch(Exception e){}
        q.setInteger(i+1, id);
      }
      q.setInteger(i+1, -1);
      int er = q.executeUpdate();
      commit();
      return er;
    }catch(HibernateException e){
      rollback();
      throw e;
    }
  }
 
}
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