OnlineSessionDAO.java
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package com.huaheng.framework.shiro.session;
import java.io.Serializable;
import java.util.Date;
import org.apache.shiro.session.Session;
import org.apache.shiro.session.mgt.eis.EnterpriseCacheSessionDAO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import com.huaheng.pc.monitor.online.domain.OnlineSession;
import com.huaheng.pc.monitor.online.domain.UserOnline;
import com.huaheng.pc.monitor.online.service.IUserOnlineService;
/**
* 针对自定义的ShiroSession的db操作
*
* @author huaheng
*/
public class OnlineSessionDAO extends EnterpriseCacheSessionDAO
{
/**
* 同步session到数据库的周期 单位为毫秒（默认1分钟）
*/
@Value("${shiro.session.dbSyncPeriod}")
private int dbSyncPeriod;
/**
* 上次同步数据库的时间戳
*/
private static final String LAST_SYNC_DB_TIMESTAMP = OnlineSessionDAO.class.getName() + "LAST_SYNC_DB_TIMESTAMP";
@Autowired
private IUserOnlineService onlineService;
@Autowired
private OnlineSessionFactory onlineSessionFactory;
public OnlineSessionDAO()
{
super();
}
public OnlineSessionDAO(long expireTime)
{
super();
}
/**
* 根据会话ID获取会话
*
* @param sessionId 会话ID
* @return ShiroSession
*/
@Override
protected Session doReadSession(Serializable sessionId)
{
UserOnline userOnline = onlineService.selectOnlineById(String.valueOf(sessionId));
if (userOnline == null)
{
return null;
}
return onlineSessionFactory.createSession(userOnline);
}
/**
* 更新会话；如更新会话最后访问时间/停止会话/设置超时时间/设置移除属性等会调用
*/
public void syncToDb(OnlineSession onlineSession)
{
Date lastSyncTimestamp = (Date) onlineSession.getAttribute(LAST_SYNC_DB_TIMESTAMP);
if (lastSyncTimestamp != null)
{
boolean needSync = true;
long deltaTime = onlineSession.getLastAccessTime().getTime() - lastSyncTimestamp.getTime();
if (deltaTime < dbSyncPeriod * 60 * 1000)
{
// 时间差不足 无需同步
needSync = false;
}
boolean isGuest = onlineSession.getUserId() == null || onlineSession.getUserId() == 0L;
// session 数据变更了 同步
if (isGuest == false && onlineSession.isAttributeChanged())
{
needSync = true;
}
if (needSync == false)
{
return;
}
}
onlineSession.setAttribute(LAST_SYNC_DB_TIMESTAMP, onlineSession.getLastAccessTime());
// 更新完后 重置标识
if (onlineSession.isAttributeChanged())
{
onlineSession.resetAttributeChanged();
}
onlineService.saveOnline(UserOnline.fromOnlineSession(onlineSession));
}
/**
* 当会话过期/停止（如用户退出时）属性等会调用
*/
@Override
protected void doDelete(Session session)
{
OnlineSession onlineSession = (OnlineSession) session;
if (null == onlineSession)
{
return;
}
onlineSession.setStatus(OnlineSession.OnlineStatus.off_line);
onlineService.deleteOnlineById(String.valueOf(onlineSession.getId()));
}
}