如何发布多个org.hibernate.impl.SessionFactoryImpl

Question

继续解决这个问题,我发现使用MAT有几个'org.hibernate.impl.SessionFactoryImpl'内存泄漏:

54 instances of "org.hibernate.impl.SessionFactoryImpl", loaded by "org.apache.catalina.loader.WebappClassLoader @ 0xbb00fb0" occupy 33 962 536 (64,40%) bytes. 

Biggest instances:

org.hibernate.impl.SessionFactoryImpl @ 0x3f026c0 - 652 664 (1,24%) bytes. 
org.hibernate.impl.SessionFactoryImpl @ 0x49018f8 - 652 664 (1,24%) bytes. 
org.hibernate.impl.SessionFactoryImpl @ 0x7b0e2b8 - 652 664 (1,24%) bytes. 
org.hibernate.impl.SessionFactoryImpl @ 0x7d65e60 - 652 664 (1,24%) bytes.
...

详情:

DaoSF.java

public final class DaoSF implements Serializable
{
  private static final long serialVersionUID = 1L;
  private static SessionFactory sessionFactory;
  private static Session hibSession;

  private synchronized static void initSessionFactory() {
    Configuration config = new Configuration();
    config.configure("hibernate.cfg.xml"); 
    sessionFactory = config.buildSessionFactory();
    hibSession = sessionFactory.getCurrentSession();
  }

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

  public static Session getSession(){ 
    return hibSession;
  }
}

DaoCrud.java的一部分:

  public void save(Object dataItem) throws Exception 
  { 
    session = DaoSF.getSessionFactory().openSession();

    Transaction tx = session.beginTransaction();  
    session.save(dataItem);  
    session.flush();
    tx.commit();  

    if (session != null) session.close();
  }

Bean.java的一部分

 public void save() {
   try {
     mydao.save(item);
   }
   catch (Exception e) {...}
   }  
 }

我做错了什么？如何正确使用会话工厂？你可以帮帮我吗？

Answer 1

如果您可以创建一个将处理打开,关闭和回滚事务的类HibernateSession会更好.

您应该将session.close()放在finally语句中,然后将null分配给会话和事务,以确保它们将被垃圾回收.