Hi all,

I am using [b]Hibernate version: 3.1.2[/b].

My database is populated by an import. All primary keys are auto-generated by Hibernate/the database, but there is also a unique ID for each record which comes from the import data.

The application sometimes needs to refer to the entities via the external unique id. To increase performance of the application, a cache of the entities by external id - not primary key - would be helpful, probably as a first-level cache. Second-level cache would be fine also.

As far as I understand, the hibernate caches are always by primary key.

Of course, it is always possible to build such a cache outside of Hibernate, but I am wondering whether it is possible within hibernate.

Any comments on this ?

Thanks