Does @Cacheable#cacheNames have nothing to do with Redis?

Question

I annotated my service as follows

@Cacheable(cacheNames = {"some"},
           key = "{#req.some, #req.other, #req.property}")
public List<Some> listSome(SomeReq req) {
    ..
}

It seems work and I saw these keys via Medis. (coupon is the value of spring.cache.redis.key-prefix.)

coupon{Some},{Other},{Property}
coupon{Some},{Other},{Property}
coupon{Some},{Other},{Property}
coupon{Some},{Other},{Property}
coupon{Some},{Other},{Property}
coupon{Some},{Other},{Property}

Where was the cacheNames in action?

Is it possible to collide if I add other service method with same pattern of keys?

@Cacheable(cacheNames = {"someOther"},
           key = "{#req.some, #req.other, #req.property}")    
List<SomeOther> listSomeOthers(SomeOtherReq req) {
}

score 1 · Answer 1 · answered Jun 24 '19 at 08:54

1

Is it possible to collide if I add other service method with same pattern of keys?

No because cacheNames are (work like) namespaces so you can use same keys in different namespaces.

answered Jun 24 '19 at 08:54

akuma8

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Is this really a true fact even with Redis? – Jin Kwon Jun 24 '19 at 09:57
if you take a look at Redis keys `$keys *`, you can see that each key has the `cacheName` prepended. – akuma8 Jun 25 '19 at 22:43
No, I don't see any prepended `cacheNames` value from the `KEYS '*'`. Are we talking about Spring? – Jin Kwon Jun 26 '19 at 01:16
I finally got it. I need to define a bean for `RedisCacheManager`. – Jin Kwon Jun 26 '19 at 01:55
Sorry about `keys *`, I usually use Spring Boot which provides a default cache configuration with cacheName prepended on each key. – akuma8 Jun 26 '19 at 08:16

score 1 · Accepted Answer · answered Jun 26 '19 at 03:22

I'm answering for my own question for further reachers.

Simply, I need to defined a bean for a RedisCacheManager to make the cacheNames works.

@Bean
public RedisCacheManager cacheManager(RedisConnectionFactory connectionFactory) {
    final RedisCacheManager cacheManager = RedisCacheManager.builder(connectionFactory)
            .cacheDefaults(defaultCacheConfig())
            .build();
    return cacheManager;
}

As you can see I didn't change anything from defaultCacheConfig().

And the keys are property prefixed with {cacheName}::.

Does @Cacheable#cacheNames have nothing to do with Redis?

2 Answers2