Difference between evictAll and refresh

Question

What is the difference between evictAll and refresh :

em.getEntityManagerFactory().getCache().evict(AdminUtilisateur.class, user);

and

em.refresh(em.getReference(AdminUtilisateur.class, user.getId()));

And when should i use each one?

Thank you.

Answer 1

evict : Mark an instance as no longer needed in the cache.

refresh : Refresh the state of the instance from the database, overwriting changes made to the entity