Load data from relational table to Redis [closed]

I have a relational table bearing key value pairs. I expect to keep these at REDIS for faster fetch while using at my code.

Project tech Stack: Java, SpringBoot, REST

What would be the best approach for doing this?Some which I could brainstorm are

1. Build a Rest API which would read Sql Table and write on Redis

   Cons: would require manual intervention

2. At onApplicationLoad Event, push the values on Redis

   Cons: This would happen on every deployment

Please suggest me the best approach

Sql Table

id key  val 1  xxx   1002  yyy   200 3  zzz   300 

Expected Redis State

redis:6379> MGET xxx yyy zzz1) 1002) 2003) 300