Hi there,
@NaturalId only works on root entities. As with JPA 2.2 (Hibernate 5.3), caching is also supported on non root entities, this might be a good opportunity to implement the support of @NaturalId on non root entities as well.
My use case:
{code:java}
@Entity
public class Setting extends Base<BOSetting> {
private SettingType type;
private String scope;
private String name;
private String value;
private String description;
public enum SettingType {
APPLICATION, PROJECT, USER;
}
(...)
}
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public abstract class Base<BO extends BOBase<? extends Base<BO>>> extends DatabaseEntity<BO> implements IBase {
(...)
}
@MappedSuperclass
public abstract class DatabaseEntity<BO extends BODatabaseEntity<? extends DatabaseEntity<BO>>>
implements IDatabaseEntity, Comparable<DatabaseEntity<BO>> {
(...)
}
{code}
For compatibility reasons, we have to stick to the joined inheritance approach. As settings change rarely and are frequently queries by name, type& scope, the idea is to annotate these properies with @NaturalId. As this is currently not working, I'm effectively forced to build a separate caching mechanism. Also in perspective of implementation consistency, I think it makes sense to allow this to somehow stick to JPA 2.2, although this is a native feature.
Regards,
Niko |
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