Question

我正在使用spring和hibernate。 Hibernate 4.2将Ejb3Configuration类声明为已弃用，并且没有方法 getEventListeners ，它允许设置侦听器。此类用于获取EntityManagerFactory。

我用它来进行数据库试听（记录更新，插入，删除事件）。我如何通过试听配置获取EntityManagerFactory？

public class HibernateExtendedPersistenceProvider extends HibernatePersistence {

    private PostInsertEventListener[] postInsertEventListeners;
    private PostUpdateEventListener[] postUpdateEventListeners;
    private PostDeleteEventListener[] postDeleteEventListeners;

    @SuppressWarnings("rawtypes")
    @Override
    public EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, Map properties) {
        Ejb3Configuration cfg = new Ejb3Configuration();
        setupConfiguration(cfg);
        Ejb3Configuration configured = cfg.configure( persistenceUnitName, properties );
        return configured != null ? configured.buildEntityManagerFactory() : null;
    }

    @SuppressWarnings("rawtypes")
    @Override
    public EntityManagerFactory createContainerEntityManagerFactory(PersistenceUnitInfo info, Map properties) {
        Ejb3Configuration cfg = new Ejb3Configuration();
        setupConfiguration(cfg);
        Ejb3Configuration configured = cfg.configure( info, properties );
        return configured != null ? configured.buildEntityManagerFactory() : null;
    }

    private void setupConfiguration(Ejb3Configuration cfg) {
        // 4.2: Ejb3Configuration deprecated and has no method getEventListeners
        cfg.getEventListeners().setPostInsertEventListeners(postInsertEventListeners); 
        cfg.getEventListeners().setPostDeleteEventListeners(postDeleteEventListeners);
        cfg.getEventListeners().setPostUpdateEventListeners(postUpdateEventListeners);
    }

    public void setPostInsertEventListeners(PostInsertEventListener[] postInsertEventListeners) {
        this.postInsertEventListeners = postInsertEventListeners;
    }

    public void setPostUpdateEventListeners(PostUpdateEventListener[] postUpdateEventListeners) {
        this.postUpdateEventListeners = postUpdateEventListeners;
    }

    public void setPostDeleteEventListeners(PostDeleteEventListener[] postDeleteEventListeners) {
        this.postDeleteEventListeners = postDeleteEventListeners;
    }
}

Answer 1

如果您对源代码有控制权，我会看看hibernate envers。它在版本控制方面做得很好。它不仅仅是像更新的审计跟踪，而是跟踪旧的实体版本。

JPA实体监听器api的缺点是在更改之前无法轻松访问原始值。您必须从某处获取这些值以创建增量。

您仍然可以注册您的hibernate事件监听器，但现在推荐的方法是使用SPI。查看Hibernate Integrator，看看它是如何完成的。

Hibernate：从3.6.9迁移到4.2

1 个答案: