Spring's cache abstraction allows you to create custom caching annotations for your application to recognize the cache method for the cache population or cache eviction. Spring's @Cacheable and @CacheEvict annotations are used as Meta annotations to create custom cache annotation. Let's see the following code for custom annotations in an application:
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
@Cacheable(value="accountCache", key="#account.id")
public @interface SlowService {
} In the preceding code snippet, we have defined a custom annotation named as SlowService, which is annotated with Spring's @Cacheable annotation. If we use @Cacheable in the application, then we have to configure it as the following code:
@Cacheable(value="accountCache", key="#account.id")
public Account findAccount(Long accountId) Let's replace the preceding configuration with our defined custom annotation, with the following...