Avoid StaleObjectStateException when deleting entity
@Transactional
public MyEntity getAndDelete(String prop) {
    List<MyEntity> list = (List<MyEntity>)sessionFactory
        .getCurrentSession()
        .createCriteria(MyEntity.class)
        .add( Restrictions.eq("prop", prop) )
        .list();

    // process the list, and find one entity
    MyEntity entity = findEntity(list);
    if (entity != null) {
        sessionFactory.getCurrentSession().delete(entity);
    }
    return entity;
}

@Transactional
public MyEntity getAndDelete(String prop) {
    List<MyEntity> list = (List<MyEntity>)sessionFactory
        .getCurrentSession()
        .createCriteria(MyEntity.class)
        .add( Restrictions.eq("prop", prop) )
        .list();

    // process the list, and find one entity
    MyEntity entity = findEntity(list);
    if (entity != null) {
        // reload the entity with "select ...for update"
        // to ensure the exception is not thrown
        MyEntity locked = (MyEntity)sessionFactory
            .getCurrentSession()
            .load(MyEntity.class, entity.getId(), new LockOptions(LockMode.PESSIMISTIC_WRITE));
        if (locked != null) {
            sessionFactory.getCurrentSession().delete(locked);
        }
    }
    return entity;
}

@Transactional
public MyEntity getAndDelete(String prop) {
    List<MyEntity> list = (List<MyEntity>)sessionFactory
        .getCurrentSession()
        .createCriteria(MyEntity.class)
        .add( Restrictions.eq("prop", prop) )
        .list();

    // process the list, and find one entity
    MyEntity entity = findEntity(list);
    if (entity != null) {

        // Remove the entity from the session.
        sessionFactory.getCurrentSession().evict(entity);

        // reload the entity with "select ...for update"
        MyEntity locked = (MyEntity)sessionFactory
            .getCurrentSession()
            .get(MyEntity.class, entity.getId(), new LockOptions(LockMode.PESSIMISTIC_WRITE));
        if (locked != null) {
            sessionFactory.getCurrentSession().delete(locked);
        }
    }
    return entity;
}