Shiro框架集成redis速度过慢问题

多次请求断点发现频繁调用了doReadSession方法。

    @Override
    protected Session doReadSession(Serializable sessionId) {
        if(sessionId == null){
            return null;
        }
        Session o = (Session)redisTemplate.opsForValue().get(SESSION_NAME+":"+sessionId);
        return o;
    }

解决方案：重写DefaultWebSessionManager里面的retrieveSession方法

  @Bean("sessionManager")
    public SessionManager sessionManager(@Qualifier("redisSessionDao")RedisSessionDao redisSessionDao) {
        DefaultWebSessionManager sessionManager =new DefaultWebSessionManager() {
            @Override
            protected Session retrieveSession(SessionKey sessionKey) throws UnknownSessionException {
                Serializable sessionId = getSessionId(sessionKey);
                ServletRequest request = null;
                if (sessionKey instanceof WebSessionKey) {
                    request = ((WebSessionKey) sessionKey).getServletRequest();
                }
                if (request != null && sessionId != null) {
                    Session session = (Session) request.getAttribute(sessionId.toString());
                    if (session != null) {
                        return session;
                    }
                }
                Session session = super.retrieveSession(sessionKey);
                if (request != null && sessionId != null) {
                    request.setAttribute(sessionId.toString(), session);
                }
                return session;
            }
        };
        sessionManager.setSessionValidationSchedulerEnabled(true);
        sessionManager.setSessionIdUrlRewritingEnabled(false);
        sessionManager.setDeleteInvalidSessions(true);
        sessionManager.setSessionIdCookie(new     SimpleCookie(RedisSessionDao.SESSION_NAME));
        sessionManager.setSessionDAO(redisSessionDao);
        return sessionManager;
    }