org.hibernate.HibernateException：使用tx：advise找不到当前线程的会话

Question

I am using spring 3.2 with hibernate 4. I want to use spring to control the transactions. However with the configuration mentioned below I get the

'Servlet.service() for servlet spring threw exception: org.hibernate.HibernateException: No Session found for current thread'

exception:

<aop:config>
    <aop:pointcut id="serviceMethods"
        expression="execution(* com.locator.service.impl.ServiceTypeService.*(..))" />
    <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethods" />
</aop:config>

<tx:advice id="txAdvice" transaction-manager="hbTransactionManager">
    <tx:attributes>
        <tx:method name="*" propagation="REQUIRED" />
    </tx:attributes>
</tx:advice>

<!-- Hibernate session factory -->
<bean id="hbSessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource">
        <ref bean="dataSource" />
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>

    <property name="mappingResources">
        <list>
            <value>../spring/model/ServiceType.hbm.xml</value>
        </list>
    </property>

</bean>

<bean id="hbTransactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="hbSessionFactory" />
</bean>

<bean id="serviceTypeService" class="com.locator.service.impl.ServiceTypeService">
    <property name="serviceTypeDao" ref="serviceTypeDao"></property>
</bean>

<bean id="serviceTypeDao" class="com.locator.dao.impl.ServiceTypeDao">
    <property name="sessionFactory" ref="hbSessionFactory"></property>
</bean>

The code for the Dao layer and the Service is as follows:

public class ServiceTypeDao implements IServiceTypeDao{

    private static final Log log = LogFactory.getLog(ServiceTypeDao.class);

    private SessionFactory sessionFactory;

    public SessionFactory getSessionFactory(){
        return sessionFactory;
    }

    public void setSessionFactory(SessionFactory sessionFactory){
        this.sessionFactory = sessionFactory;
    }

    public ServiceType findById(int id) {
        log.debug("getting ServiceType instance with id: " + id);
        try {
            Session session = getSessionFactory().getCurrentSession();
            ServiceType instance = (ServiceType)  session.get("com.locator.model.ServiceType", id);
            if (instance == null) {
                log.debug("get successful, no instance found");
            } else {
                log.debug("get successful, instance found");
            }

            instance.setName(instance.getName()+"0");
            session.saveOrUpdate(instance);

            return instance;
        }catch (RuntimeException re) {
            log.error("get failed", re);
            throw re;
        }
    }
}


public class ServiceTypeService implements IServiceTypeService{

    private ServiceTypeDao serviceTypeDao;

    public void setServiceTypeDao(ServiceTypeDao serviceTypeDao){
        this.serviceTypeDao = serviceTypeDao;
    }

    public ServiceType getServiceTypeById(int id){
        return serviceTypeDao.findById(id);
    }
}

Replacing getSessionFactory().getCurrentSession() with getSessionFactory().openSession() will resolve the above issue however, it will mean that the developer will then be responsible for the session open/close rather than spring. Therefore, please advise how this can be resolved using spring.

Answer 1

I was able to resolve the issue. It was occurring due to the following problems:

1. The Service class had not been Auto wired into the controller ie the @Autowired annotation was missing.
2. The configuration for the web.xml had to be modified with the listener class 'org.springframework.web.context.ContextLoaderListener' and the context-param was added.