java如何在redis中为SSO刷新令牌的过期时间？

Question

当客户端（浏览器）访问任何资源时，应更新令牌的过期时间（延迟），如何实现此要求？ 使用拦截器或过滤器，并将令牌重新设置到redis服务器

Answer 1

有几种方法可以做到这一点

1。调整Redis服务器的配置self descriptive redis.conf

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maxmemory-policy <POLICY>替换这个<POLICY>

# volatile-lru -> Evict using approximated LRU among the keys with an expire set.
# allkeys-lru -> Evict any key using approximated LRU.
# volatile-lfu -> Evict using approximated LFU among the keys with an expire set.
# allkeys-lfu -> Evict any key using approximated LFU.

2。在访问数据时更新ttl值Jedis expire

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如果您使用的是jedis（redis java驱动程序）然后您可以通过jedis.expire(key, time_after_expire_in_second)设置该键的TTL

   expire(String key, int seconds) 
      Set a timeout on the specified key.

   expireAt(String key, long unixTime) 
      EXPIREAT works exctly like EXPIRE but instead to get the number of seconds representing the Time To Live of the key as a second argument (that is a relative way of specifing the TTL), it takes an absolute one in the form of a UNIX timestamp (Number of seconds elapsed since 1 Gen 1970).

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