@Cachable on methods without input parameters?

Question

I'm having a problem with @org.springframework.cache.annotation.Cachable annotation:

@Bean
public ConcurrentMapCache cache() {
    return new ConcurrentMapCache(CACHE);
}

@Cacheable(CACHE)
public String getApi() {
    return "api";
}

@Cacheable(CACHE)
public String getUrl() {
    return "url";
}

usage:

assertEquals("api", service.getApi()); //OK
assertEquals("url", service.getUrl()); //FAILURE. this returns also "api"

So, why does @Cachable not create a cache result by method name if method signature does not contain any input parameters?

Answer 1

Try this

@Cacheable(value = CACHE, key = "#root.method.name")

You need to tell spring to use method name as key. You can use SPEL for this. Here is the doc with various other options.

Answer 2

You can use two cache with different name:

@Bean
public ConcurrentMapCache cache() {
    return new ConcurrentMapCache(CACHE_API, CACHE_URL);
}
@Cacheable(CACHE_API)
public String getApi() {
    return "api";
}

@Cacheable(CACHE_URL)
public String getUrl() {
    return "url";
}