NaturalIdCache (Hibernate Javadocs)

```
@Target(TYPE)
@Retention(RUNTIME)
public @interface NaturalIdCache
```
Specifies that mappings from the natural id values of the annotated entity to the corresponding entity id values should be cached in the shared second-level cache. This allows Hibernate to sometimes avoid round trip to the database when a cached entity is retrieved by its natural id.
This annotation is usually used in combination with Cache, since a round trip may only be avoided if the entity itself is also available in the cache.

See Also:

NaturalId

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  String region
  Specifies an explicit cache region name.

- Element Detail
  - region
```
String region
```
    Specifies an explicit cache region name.
    By default, the region name is EntityName##NaturalId.
    
    Default:
    
    ""