Question

Is any way to remove cache for a specific named query? I don’t really want to remove for all queries… Or is there any other workaround?

It is not working even if I am using the normal Query class…

I am using hibernate 3.6, glassfish 3.1.1, this is an java ee application (code from ejb module)

I have something like this:

public User getUserByName(String username) {
    try {
        return (User) em.createNamedQuery("User.getUserByName").setParameter("username", username).getSingleResult();
    } catch (NoResultException e) {
        return null;
    }
}
//...
if(getUserByName(entity.getUsername()!=null) {
    em.persist(entity);
}
//...
// username added in database (checked)
if(getUserByName(entity.getUsername())==null) {
    //something else
}

the second time I use “getUserByName” is again.. null… why?

I am thinking it’s the cache module(because if I set my provider to eclipselink it’s working as it should)…

I am using hibernate for it’s search..

Answer 1

With EclipseLink you can do this:

 Query query = em.createNamedQuery("Users.findByUsername");
 query.setHint("javax.persistence.cache.storeMode", "REFRESH");

For hibernate the hint is:
org.hibernate.cacheMode “Override the cache mode for this query ( eg. CacheMode.REFRESH )”
For further reading and understanding: old article