How Spring store cache and key to Redis

Question

I follow some tutorial on web to setup Spring Cache with redis,

my function look like this:

@Cacheable(value = "post-single", key = "#id", unless = "#result.shares < 500")
@GetMapping("/{id}")
public Post getPostByID(@PathVariable String id) throws PostNotFoundException {
 log.info("get post with id {}", id);
 return postService.getPostByID(id);
}

As I understand, the value inside @Cacheable is the cache name and key is the cache key inside that cache name. I also know Redis is an in-memory key/value store. But now I'm confused about how Spring will store cache name to Redis because looks like Redis only manages key and value, not cache name.

Looking for anyone who can explain to me.

Thanks in advance

Answer 1

Spring uses cache name as the key prefix when storing your data. For example, when you call your endpoint with id=1 you will see in Redis this key

post-single::1

You can customize the prefix format through CacheKeyPrefix class.

• uncle bob: Thanks @Aleh i also found how to config cache key prefix here stackoverflow.com/questions/56764225/…