我们将我们的应用程序从Spring 3.2.13.RELEASE / Hibernate 3.5.6-Final升级到Spring 4.3.6.RELEASE / Hibernate 4.2.20.Final-redhat-1。
在Hibernate 3中,我们有了HibernateInterceptor,它具有很好的功能。
我们使用这个拦截器通过打开一个新会话来设置我们的EntityInterceptor(Prototype)。
<bean id="hibernateInterceptor" class="org.springframework.orm.hibernate3.HibernateInterceptor">
<property name="sessionFactory">
<ref bean="sessionFactory"/>
</property>
<property name="entityInterceptorBeanName">
<value>entityInterceptorName</value> <!--set with BeanFactory -->
</property>
</bean>
<bean id="entityInterceptorName" class="..." scope="prototype" />
Spring / Hibernate 4中没有任何等效类。
我们知道,HibernateTransactionManager具有这样的功能,但是没有办法在JtaTransactionManager中设置它(我们实际使用的是什么)。
有什么理由,为什么这些Transactionmanagers功能不同?
有没有其他方法可以像这样使用Entityinterceptor?
答案 0 :(得分:0)
我们找到了两个解决方法。
其中之一是使用SessionFactory上的Class定义hibernate.current_session_context_class。我们的类设置了JTASessionContext的实现。
<property name="hibernateProperties">
<props>
*
<prop key="hibernate.current_session_context_class">org.path.to.my.context.MySpringSessionContext</prop>
*
</props>
</property>
拥有sessioncontext:
public class MySpringSessionContext extends SpringSessionContext {
public MySpringSessionContext(SessionFactoryImplementor sessionFactory) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
super(sessionFactory);
Field transactionManager = this.getClass().getSuperclass().getDeclaredField("transactionManager");
transactionManager.setAccessible(true);
Object value = transactionManager.get(this);
if (value != null) {
Field jtaSessionContext = this.getClass().getSuperclass().getDeclaredField("jtaSessionContext");
jtaSessionContext.setAccessible(true);
jtaSessionContext.set(this, new MySpringJtaSessionContext(sessionFactory));
}
}
}
拥有JTASessionContext:
public class MySpringJtaSessionContext extends SpringJtaSessionContext {
private BeanFactory beanFactory;
private String entityInterceptor;
public MySpringJtaSessionContext(SessionFactoryImplementor factory) {
super(factory);
//Ugly but we need Spring
Interceptor interceptor = factory.getInterceptor();
if(interceptor instanceof MyBeanFactoryInterceptor){
this.beanFactory = ((MyBeanFactoryInterceptor) interceptor).getBeanFactory();
this.entityInterceptor = ((MyBeanFactoryInterceptor) interceptor).getEntityInterceptorBeanName();
}
}
@Override
protected SessionBuilder baseSessionBuilder() {
return super.baseSessionBuilder().interceptor(getEntityInterceptor());
}
public Interceptor getEntityInterceptor() throws IllegalStateException, BeansException {
if (this.beanFactory == null) {
return EmptyInterceptor.INSTANCE;
}
return this.beanFactory.getBean((String) this.entityInterceptor, Interceptor.class);
}
}
另一种解决方法:使用OpenSessionInterceptor(覆盖),但还有其他一些困难。(刷新,关闭会话)但是喜欢:
使用entityinterceptor打开会话:
@Override
protected Session openSession() {
try {
Session session = getSessionFactory().withOptions().interceptor(getEntityInterceptor()).openSession();
if (TransactionSynchronizationManager.isCurrentTransactionReadOnly()) {
session.setFlushMode(FlushMode.MANUAL);
} else {
session.setFlushMode(FlushMode.AUTO);
}
return session;
} catch (HibernateException ex) {
throw new DataAccessResourceFailureException("Could not open Hibernate Session", ex);
}
}
从Spring获取拦截器:
public Interceptor getEntityInterceptor() throws IllegalStateException, BeansException {
if (this.entityInterceptor instanceof String) {
if (this.beanFactory == null) {
throw new IllegalStateException("Cannot get entity interceptor via bean name if no bean factory set");
}
return this.beanFactory.getBean((String) this.entityInterceptor, Interceptor.class);
}
return (Interceptor) this.entityInterceptor;
}