CODEWITHSUNDEEP
javadatabasehibernatejpalocking
Vrishank
Vrishank

Reputation: 364

How to change version without updating entity data in optimistic_force_increment hibernate jpa?

I am new to Hibernate JPA. As I understand the optimistic_force_increment in hibernate jpa: if the entity is updated anywhere in a transaction when updated entity commits, it updates the version field column in database.

Now my question is, is there any way to update the @version field without updating any data inside the entity?

Highly appreciate a code snippet or example to do the same.

Upvotes: 2

Views: 1953

Answers (2)

olivmir
olivmir

Reputation: 722

Look at this article: https://thorben-janssen.com/hibernate-tips-increase-version-parent-entity-updating-child-entity/

For increasing the version without updating it, the author proposes the following:

TypedQuery q = em.createQuery("SELECT b FROM Book b WHERE b.id = 1", Book.class);
q.setLockMode(LockModeType.OPTIMISTIC_FORCE_INCREMENT);
Book b = q.getSingleResult();

Additionally look at this article, that also deals with this question and proposes how this can be automatically done via event listeners: https://vladmihalcea.com/how-to-increment-the-parent-entity-version-whenever-a-child-entity-gets-modified-with-jpa-and-hibernate/

Upvotes: 0

Zufar Muhamadeev
Zufar Muhamadeev

Reputation: 3212

There is workaround: you could evict and add entity to session, look at this snippet:

    public void forceUpdate(Object aEntity) {
        getHibernateTemplate().execute(new HibernateCallback<Void>() {
            @Override
            public Void doInHibernate(Session aSession) throws HibernateException {
                if (aSession.contains(aEntity)) {
                    aSession.evict(aEntity);
                }
                aSession.update(aEntity);
                return null;
            }
        });
    }

Upvotes: 1

Related Questions