在Hibernate 4中创建会话工厂

Question

我在Hibernate 4中生成会话工厂时遇到了麻烦.在Hibernate 3中我简单地做了:

org.hibernate.cfg.Configuration conf= HibernateUtil
    .getLimsInitializedConfiguration(systemConfiguration
.getHibernateconfFile());

SessionFactory sf = conf.configure().buildSessionFactory();

现在我需要将ServiceRegistry类传递给buildSessionFactory,但是Javadocs对于如何解决这个问题非常模糊.有小费吗？

Answer 1

是的,他们已经弃用了之前的buildSessionFactory API,并且很容易做得很好..你可以做这样的事情..

编辑:ServiceRegistryBuilder已弃用.您必须使用StandardServiceRegistryBuilder

public void testConnection() throws Exception {

            logger.info("Trying to create a test connection with the database.");
            Configuration configuration = new Configuration();
            configuration.configure("hibernate_sp.cfg.xml");
            StandardServiceRegistryBuilder ssrb = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
            SessionFactory sessionFactory = configuration.buildSessionFactory(ssrb.build());
            Session session = sessionFactory.openSession();
            logger.info("Test connection with the database created successfuly.");
    }

有关更多参考和深入细节,您可以访问https://github.com/hibernate/hibernate-orm/blob/master/hibernate-testing/src/main/java/org/hibernate/testing查看hibernate的官方测试用例./junit4/BaseCoreFunctionalTestCase.java函数(buildSessionFactory()).

Answer 2

试试这个!

package your.package;

import org.hibernate.HibernateException;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public class HibernateUtil
{
    private static SessionFactory sessionFactory;
    private static ServiceRegistry serviceRegistry;

    static
    {
        try
        {
//          Configuration configuration = new Configuration();
            Configuration configuration = new Configuration().configure();

            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        }
        catch (HibernateException he)
        {
            System.err.println("Error creating Session: " + he);
            throw new ExceptionInInitializerError(he);
        }
    }

    public static SessionFactory getSessionFactory()
    {
        return sessionFactory;
    } 
}

Answer 3

Configuration hibConfiguration = new Configuration()
            .addResource("wp4core/hibernate/config/table.hbm.xml")
            .configure();       

serviceRegistry = new ServiceRegistryBuilder()
            .applySettings(hibConfiguration.getProperties())
            .buildServiceRegistry();

sessionFactory = hibConfiguration.buildSessionFactory(serviceRegistry);
session = sessionFactory.withOptions().openSession();

Answer 4

以下表示我使用hibernate 4.0.0.Final的经验.

类的javadoc(根据LGPL许可证分发)org.hibernate.cfg.Configuration声明:

注意:在4.0版本之后,将使用ServiceRegistryBuilder和 org.hibernate.metamodel.MetadataSources替换此版本,此时此类将被弃用并计划在5.0中删除.有关详细信息,请参见HHH-6183,HHH-2578和 HHH-6586

在查看问题2578后,我使用了这样的东西:

ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().configure().buildServiceRegistry();
MetadataSources metadataSources = new MetadataSources(serviceRegistry);
metadataSources.addResource("some_mapping.hbm.xml")
SessionFactory sessionFactory = metadataSources.buildMetadata().buildSessionFactory();

为了开始阅读配置,我不得不修改我的hibernate 3.2.6配置和映射文件以使用xmlns="http://www.hibernate.org/xsd/hibernate-configuration",xmlns="http://www.hibernate.org/xsd/hibernate-mapping"并且还删除了dtd规范.

我找不到一种方法来检查hibernate.cfg.xml和hibernate中定义的映射 .前缀在休眠相关的属性的hibernate.cfg.xml不再是可有可无的.

这可能适用于某些人.

我为一个人遇到了一些错误,因为包含的映射文件<cache usage="read-write" />最终使用了弃用的配置方式:

Configuration configuration = new Configuration().configure();
SessionFactoryImpl sessionFactory = (SessionFactoryImpl) configuration.buildSessionFactory();
EventListenerRegistry listenerRegistry = sessionFactory.getServiceRegistry().getService(EventListenerRegistry.class);
SolrIndexEventListener indexListener = new SolrIndexEventListener(); // a SaveOrUpdateEventListener i wanted to attach
listenerRegistry.appendListeners(EventType.SAVE_UPDATE, indexListener);

我不得不以编程方式附加事件侦听器,因为Configuration不再在hibernate.cfg.xml中查找它们

Answer 5

即使4.3.0 API中有更新.ServiceRegistryBuilder在4.3.0中也已弃用,并替换为StandardServiceRegistryBuilder.现在,创建会话工厂的实际代码将在创建会话工厂时查看此示例.