CODEWITHSUNDEEP
javajakarta-eejpa
coderatchet
coderatchet

Reputation: 8428

Pre-load specific entities (tables) in l2 cache with JPA

I am wondering whether it is possible to pre-load specific sets of entities (i.e. static lookup tables) into the L2 cache using generic JPA settings. Is this possible or is it JPA vendor (Hibernate, EclipseLink, etc...) dependant?

Upvotes: 3

Views: 2052

Answers (2)

Marcel Stör
Marcel Stör

Reputation: 23535

I wouldn't know of any such JPA feature. I'd simply trigger the respective calls (services, repositories, DAOs or whatever they are) during startup of your application.

Given the 2nd-level cache is properly setup and configured the entities representing your static lookup tables will remain in the cache until...well, that depends of course on your caching settings.

Upvotes: 1

Sam
Sam

Reputation: 7868

I doubt that there's a setting for such a task. However, what seemed to work when I tried exactly that, is a simple JPQL query, which should fetch the objects into the second level cache (at least Hibernate did that):

entityManager.createQuery("select x from Entity x").getResultList();

This is plain JPA and therefore not vendor dependent and could be executed in a constructor of a corresponding DAO (@Repository or @Service in Spring) or in a prefetch thread.

Upvotes: 2

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