java - Redis Template hash key with expiration

Question

I have

redisTemplate.opsForHash().put(key, hashKey, value);

I need to set key and hash key expire value, and each hash key has expired value, here is the expire for just key

redisTemplate.expire(key, timeout, unit)

Answer 1

According to the doc of redis, you can expire the whole hash, but not a single key-value pair in it.

Possible ways:

1. Break your hash into keys. Say, your hash has key myhash and sub-key and value like {apple: foo, banana: bar}. Then just instead create key myhash_apple with value foo, and myhash_banana with value bar.
2. Manually expire things. Use your code to periodically (say, at midnight) scan those hashs, and remove those outdated.