java – Hibernate Sessionfactory重启|弹簧

我的要求如下:

我需要在我的Spring Web应用程序中频繁地重新启动(或重建)hibernate会话工厂,并使用我从外部获取的新HBM文件.

目前我的Sessionfactory类如下所示,使用SessionFactory Proxy来拦截’OpenSession’调用.

在那里,我正在检查重新启动和重建sessionFactory的条件.

我的问题是,在并发环境中,处于其他事务中间的其他用户在此重新启动期间受到影响.

无论如何通过检查所有事务并打开会话来执行重启,并在其他所有事务完成后执行重建会话工厂吗?

或任何其他解决方案存在.

码:

public class DataStoreSessionFactory extends LocalSessionFactoryBean
{


   private boolean restartFactory = false;



   @Override
   protected void postProcessConfiguration(Configuration config) throws HibernateException
   {
      super.postProcessConfiguration(config);
      updateHBMList(config);
   }


   private void updateHBMList(final Configuration config)
   {

      config.addXML(modelRegistry.generateMapping());
   }

   @Override
   public SessionFactory getObject()
   {

      Object obj = super.getObject();

      /*
       * Invocation handler for the proxy
       */
      SessionFactoryProxy proxy = new SessionFactoryProxy(this, (SessionFactory) obj);

      /**
       * All the methods invoked on the returned session factory object will pass through this proxy's invocation
       * handler
       */
      SessionFactory sessionFactory = (SessionFactory) Proxy.newProxyInstance(getClass().getClassLoader(),
                                                                              new Class[] { SessionFactory.class },
                                                                              proxy);
      return sessionFactory;
   }

   static class SessionFactoryProxy implements InvocationHandler
   {


      private SessionFactory sessionFactory;

      private LocalSessionFactoryBean factoryBean;

      public SessionFactoryProxy(LocalSessionFactoryBean factoryBean, SessionFactory sessionFactory)
      {
         this.factoryBean = factoryBean;
         this.sessionFactory = sessionFactory;
      }

      public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
      {
         /**
          * Only if the method invoked is openSession - check if the session factory should be restarted, and only then
          * invoke the requested method
          */
         if (method.getName().equals("openSession"))
         {
            restartSessionFactoryIfNecessary();
         }
         return method.invoke(sessionFactory, args);
      }

      private void restartSessionFactoryIfNecessary()
      {
         restartSessionFactory();
         /*if (((DataStoreSessionFactory) factoryBean).isRestartFactory())
         {
            restartSessionFactory();
         }*/
      }

      private synchronized void restartSessionFactory()
      {
         log.info("Restarting session...");
         factoryBean.destroy();
         try
         {
            factoryBean.afterPropertiesSet();
            sessionFactory = factoryBean.getObject();
         }
         catch (Exception e)
         {
            log.error("Error while restarting session: " + e.getMessage());
            throw new RuntimeException(e);
         }
      }
   }

谢谢,
Appasamy

最佳答案 您可以关注SessionFactoryUtils以确定事务是否在Session工厂中发生,然后决定是否重新启动会话工厂:

您需要导入 – >你文件中的org.springframework.orm.hibernate.SessionFactoryUtils,并使用以下API.

    static boolean  hasTransactionalSession(SessionFactory sessionFactory); 

以上API返回当前线程是否存在事务性Hibernate会话,即Spring的事务工具绑定到当前线程的Session.如果您需要检查会话是否在会话中是事务性的,还有另一个API工厂目前:

static boolean isSessionTransactional(Session session,SessionFactory sessionFactory);

上面的API返回给定的特定Hibernate会话是否是事务性的,即Spring的事务工具绑定到当前线程.

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