最開始的想法是使用session監(jiān)聽器,在session創(chuàng)建時,根據(jù)sessionid為鍵,map為值,加入redis中.,在session銷毀時刪除此sessionid.

包裝session,重寫session中的方法來設(shè)置值和取得值.

包裝request,將包裝的session作為包裝request的session.

結(jié)果在實現(xiàn)時,發(fā)現(xiàn)每次創(chuàng)建session時id都不同而且控制不了,這樣的話一臺服務(wù)器死掉,切換到另一臺服務(wù)器的時候

原來存在redis中的數(shù)據(jù)得不到.

后面又想覆蓋掉jsessionid,沒成功.只能創(chuàng)建了一個rsessionid來做,在過濾器中根據(jù)此鍵來存入redis,

由于關(guān)閉ofbiz時,session銷毀沒有執(zhí)行,只能設(shè)置存活時間.

由于有多個組件要使用此功能那么在初始化連接時初始一次就行了.

不過目前為止還沒有上線,不知道這樣有沒有問題.

主要代碼:

public void init(FilterConfig arg0) throws ServletException {		if (redisClient == null) {			synchronized (RedisFilter.class) {				if (redisClient == null) {					redisClient = RedisClient.getRedisClient();				}			}		}	}	//當關(guān)閉服務(wù)器時session銷毀沒有觸發(fā)session監(jiān)聽器	PRivate void setRedisAttribute(String id) {		Jedis redis = null;		try {			redis = redisClient.getJedis();			Object redisValue = redis.get(UtilObject.getBytes(id));			if (redisValue == null) {				synchronized (RedisFilter.class) {					if (redisValue == null) {						redis.set(UtilObject.getBytes(id), UtilObject.getBytes(new HashMap<String, Object>()));						redis.expire(UtilObject.getBytes(id), 86400);					}				}			}		} catch (Exception e) {			e.printStackTrace();		} finally {			redisClient.returnJedis(redis);		}	}
HttpServletRequest request = (HttpServletRequest) arg0;		HttpServletResponse response = (HttpServletResponse) arg1;		Cookie[] cookies = request.getCookies();		String sessionId = "", cookiePath = "";		int maxAge = -1;		if (cookies != null) {			for (Cookie c : cookies) {				if (c.getName().equals("RSESSIONID")) {					sessionId = c.getValue();					cookiePath = c.getPath();					maxAge = c.getMaxAge();				}			}		}		HttpSession session = request.getSession();		sessionId = UtilValidate.isEmpty(sessionId) ? session.getId() : sessionId;		cookiePath = "/";		session.setAttribute("redisSessionId", sessionId);		Cookie c1 = new Cookie("RSESSIONID", sessionId);		c1.setPath(cookiePath);		response.addCookie(c1); 		arg2.doFilter(request, response);