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.