Java Code Examples for javax.servlet.http.HttpSessionBindingEvent#getValue()

@Override
public void attributeAdded(HttpSessionBindingEvent event) {
	String name = event.getName();

	// 登录
	if (name.equals("personInfo")) {

		PersonInfo personInfo = (PersonInfo) event.getValue();

		if (map.get(personInfo.getAccount()) != null) {

			// map 中有记录，表明该帐号在其他机器上登录过，将以前的登录失效
			HttpSession session = map.get(personInfo.getAccount());
			PersonInfo oldPersonInfo = (PersonInfo) session.getAttribute("personInfo");

			logger.debug("帐号" + oldPersonInfo.getAccount() + "在" + oldPersonInfo.getIp() + "已经登录，该登录将被迫下线。");

			session.removeAttribute("personInfo");
			session.setAttribute("msg", "您的帐号已经在其他机器上登录，您被迫下线。");
		}

		// 将session以用户名为索引，放入map中
		map.put(personInfo.getAccount(), event.getSession());
		logger.debug("帐号" + personInfo.getAccount() + "在" + personInfo.getIp() + "登录。");
	}
}
 

@Override
public void attributeReplaced(HttpSessionBindingEvent event) {
	String name = event.getName();

	// 没有注销的情况下，用另一个帐号登录
	if (name.equals("personInfo")) {

		// 移除旧的的登录信息
		PersonInfo oldPersonInfo = (PersonInfo) event.getValue();
		map.remove(oldPersonInfo.getAccount());

		// 新的登录信息
		PersonInfo personInfo = (PersonInfo) event.getSession().getAttribute("personInfo");

		// 也要检查新登录的帐号是否在别的机器上登录过
		if (map.get(personInfo.getAccount()) != null) {
			// map 中有记录，表明该帐号在其他机器上登录过，将以前的登录失效
			HttpSession session = map.get(personInfo.getAccount());
			session.removeAttribute("personInfo");
			session.setAttribute("msg", "您的帐号已经在其他机器上登录，您被迫下线。");
		}
		map.put("personInfo", event.getSession());
	}
}
 

/**
 * 清除之前已有相同帳戶登入的 sessionId 紀錄
 * 
 * @param arg0
 * @throws Exception
 */
private void cleanBeforeLoginUser(HttpSessionBindingEvent event) throws Exception {
	if (!"Y".equals(invalidateSameAccountSession)) {
		return;
	}
	String name=event.getName();
	Object value=event.getValue();
	if (Constants.SESS_ACCOUNT.equals(name)) {
		String account=((AccountObj)value).getAccount();
		List<String> sessionIdList=uSessLogHelper.findSessionIdByAccount(account);
		for (int ix=0; sessionIdList!=null && ix<sessionIdList.size(); ix++) {
			String sessId=sessionIdList.get(ix);
			HttpSession beforeUserHttpSession=sessionsMap.get(sessId);
			beforeUserHttpSession.invalidate();
			sessionsMap.remove(sessId);
			//uSessLogHelper.delete(sessId); invalidate 時 sessionDestroyed 有做刪除紀錄的功能
			log.warn("invalidate before session:"+sessId + " account:"+account);
		}
	}
}
 

/**
 * HttpSessionAttributeListener callback; processes the addition of an attribute to an HttpSession.
 *
 * NOTE: Callback is not made against an HttpFlexSession associated with a request
 * handling thread.
 * @param event the HttpSessionBindingEvent
 */
public void attributeAdded(HttpSessionBindingEvent event)
{
    if (!event.getName().equals(SESSION_ATTRIBUTE))
    {
        // Accessing flexSession via map because it may have already been unbound from httpSession.
        Map httpSessionToFlexSessionMap = getHttpSessionToFlexSessionMap(event.getSession());
        HttpFlexSession flexSession = (HttpFlexSession)httpSessionToFlexSessionMap.get(event.getSession().getId());
        if (flexSession != null)
        {
            String name = event.getName();
            Object value = event.getValue();
            flexSession.notifyAttributeBound(name, value);
            flexSession.notifyAttributeAdded(name, value);
        }
    }
}
 

/**
 * HttpSessionAttributeListener callback; processes the removal of an attribute from an HttpSession.
 *
 * NOTE: Callback is not made against an HttpFlexSession associated with a request
 * handling thread.
 * @param event the HttpSessionBindingEvent
 */
public void attributeRemoved(HttpSessionBindingEvent event)
{
    if (!event.getName().equals(SESSION_ATTRIBUTE))
    {
        // Accessing flexSession via map because it may have already been unbound from httpSession.
        Map httpSessionToFlexSessionMap = getHttpSessionToFlexSessionMap(event.getSession());
        HttpFlexSession flexSession = (HttpFlexSession)httpSessionToFlexSessionMap.get(event.getSession().getId());
        if (flexSession != null)
        {
            String name = event.getName();
            Object value = event.getValue();
            flexSession.notifyAttributeUnbound(name, value);
            flexSession.notifyAttributeRemoved(name, value);
        }
    }
}
 

/**
 * HttpSessionAttributeListener callback; processes the replacement of an attribute in an HttpSession.
 *
 * NOTE: Callback is not made against an HttpFlexSession associated with a request
 * handling thread.
 * @param event the HttpSessionBindingEvent
 */
public void attributeReplaced(HttpSessionBindingEvent event)
{
    if (!event.getName().equals(SESSION_ATTRIBUTE))
    {
        // Accessing flexSession via map because it may have already been unbound from httpSession.
        Map httpSessionToFlexSessionMap = getHttpSessionToFlexSessionMap(event.getSession());
        HttpFlexSession flexSession = (HttpFlexSession)httpSessionToFlexSessionMap.get(event.getSession().getId());
        if (flexSession != null)
        {
            String name = event.getName();
            Object value = event.getValue();
            Object newValue = flexSession.getAttribute(name);
            flexSession.notifyAttributeUnbound(name, value);
            flexSession.notifyAttributeReplaced(name, value);
            flexSession.notifyAttributeBound(name, newValue);
        }
    }
}
 

public void attributeRemoved(HttpSessionBindingEvent e) {

    if (e.getValue() instanceof GuardedDataset) {
      GuardedDataset gdataset = (GuardedDataset) e.getValue();
      gdataset.close();
      // System.out.printf(" close gdataset %s in session %s %n", gdataset, e.getSession().getId());
      // if (log.isDebugEnabled()) log.debug(" close gdataset " + gdataset + " in session " + e.getSession().getId());
    }
  }
 

public void attributeAdded(HttpSessionBindingEvent hsbe) {
	if (!"online".equals(hsbe.getName())) {
		return;
	}
	String username = (String) hsbe.getValue();
	if (username == null) {
		return;
	}
	List userList = (List) servletContext.getAttribute(OnLineUser_KEY);
	userList.add(username);
}
 

public void attributeRemoved(HttpSessionBindingEvent se) {
	if (!"online".equals(se.getName())) {
		return;
	}
	String username = (String) se.getValue();
	if (username == null) {
		return;
	}
	List userList = (List) servletContext.getAttribute(OnLineUser_KEY);
	userList.remove(username);

}
 

@Override
public void attributeReplaced(HttpSessionBindingEvent se) {
	HttpSession session = se.getSession();
	String name = se.getName();
	Object oldValue = se.getValue();
	logger.info("修改session属性：" + name + ", 原值：" + oldValue + ", 新值：" + session.getAttribute(name));
}
 

@Override
public void attributeRemoved(HttpSessionBindingEvent event) {
	String name = event.getName();

	// 注销
	if (name.equals("personInfo")) {
		// 将该session从map中移除
		PersonInfo personInfo = (PersonInfo) event.getValue();
		map.remove(personInfo.getAccount());
		logger.debug("帐号" + personInfo.getAccount() + "注销。");
	}
}
 

@Override
public void valueBound(HttpSessionBindingEvent hsbe) {
    Object obj = hsbe.getValue();
    if (LOGGER.isDebugEnabled() && obj instanceof MCRSessionResolver) {
        LOGGER.debug("Bound MCRSession {} to HttpSession {}", ((MCRSessionResolver) obj).getSessionID(),
            hsbe.getSession().getId());
    }
}
 

private void writeLoginUser(HttpSessionBindingEvent event) throws Exception {
	String sessionId=event.getSession().getId();
	String name=event.getName();
	Object value=event.getValue();
	if (Constants.SESS_ACCOUNT.equals(name)) {
		if (uSessLogHelper.count(sessionId)>0) {
			uSessLogHelper.delete(sessionId);
		}
		uSessLogHelper.insert(sessionId, ((AccountObj)value).getAccount());
	}		
}
 

/**
 * Tests whether the attribute value is serializable and logs an error if it isn't.  Note, this can be expensive
 * so we avoid it in production environments.
 * @param se the session binding event
 * @param action the listener event for logging purposes (added or replaced)
 */
protected void checkSerialization(final HttpSessionBindingEvent se, String action) {
    final Object o = se.getValue();
    if(o != null) {
        if (!isSerializable(o)) {
            LOG.error("Attribute of class " + o.getClass().getName() + " with name " + se.getName() + " from source " + se.getSource().getClass().getName() + " was " + action + " to session and does not implement " + Serializable.class.getName());
        } else if (!canBeSerialized((Serializable) o)){
            LOG.error("Attribute of class " + o.getClass().getName() + " with name " + se.getName() + " from source " + se.getSource().getClass().getName() + " was " + action + " to session and cannot be Serialized");
        }
    }
}