Spring和Hibernate：找不到当前线程的会话

Question

我收到以下错误

org.hibernate.HibernateException: No Session found for current thread
at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:97)
at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:1024)
at com.fexco.shoptaxfreemobile.service.ProfileService.registerVisitor(ProfileService.java:57)
at com.fexco.shoptaxfreemobile.controller.ProfileController.registerVisitor(ProfileController.java:91)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.fexco.shoptaxfreemobile.jsonp.JsonpCallbackFilter.doFilter(JsonpCallbackFilter.java:33)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)

服务等级

@Service
public class ProfileService {

    @Resource(name = "mySessionFactory")
    private SessionFactory sessionFactory;

    @Autowired
    private ProfileDao profileDao;

    private class CountrySorter implements Comparator<Country> {
        @Override
        public int compare(Country country1, Country country2) {
            if ( country1.getId().compareTo(new Long (3)) < 0){
                return country1.getId().compareTo(country2.getId());
            }
            return country1.getName().compareToIgnoreCase(country2.getName());
        }               
    }

    public List<Country> getCountries() {

        List<VisitorCountry> visitorCountries = profileDao.getAllCountries();

        List<Country> countries = new ArrayList<Country>();
        for ( VisitorCountry country : visitorCountries){
            countries.add(country.getCountry());
        }

        Comparator<Country> comparator = new CountrySorter();       
        Collections.sort(countries, comparator);

        return countries;
    }

    public RegisterResponse registerVisitor(JsonVisitor visitorDetails){
        Visitor storedVisitor = (Visitor) sessionFactory.getCurrentSession().get(Visitor.class, visitorDetails.getTfscNumber(), LockMode.NONE);
        if ( storedVisitor == null){
            storedVisitor = new Visitor(visitorDetails);
        }else{
            storedVisitor.setVisitorDetails(visitorDetails);    
        }

        try{
            sessionFactory.getCurrentSession().saveOrUpdate(storedVisitor);

        }catch(Exception ex){
            return new RegisterResponse(false, "Failed To Register Card. Please Try Again Later.", visitorDetails);
        }

        return new RegisterResponse(true, "", visitorDetails);

    }
}

DAO类

@Service
@Transactional
public class ProfileDao {

    @Resource(name = "mySessionFactory")
    private SessionFactory sessionFactory;

    public List getAllCountries(){

        List<VisitorCountry> visitorCountries = sessionFactory.getCurrentSession()
        .getNamedQuery("GET_ALL_COUNTRIES").list();

        return visitorCountries;

    }

    public List<Retailer> getRetailerByRetailerNumber(String retailerNo) {

        List<Retailer> retailerByRetailerNumber = sessionFactory.getCurrentSession()
        .getNamedQuery("FindRetailerByRetailerNo").setString("retailerNo", retailerNo).list();

        return retailerByRetailerNumber;
    }

我在我的application-context.xml中有这个

<tx:annotation-driven transaction-manager="transactionManager"/>

<bean id="mySessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="myDataSource" />
    <property name="configLocation" value="classpath:hibernate.cfg.xml" />
    <property name="hibernateProperties">
        <value>
            <![CDATA[
        hibernate.show_sql=true
        hibernate.format_sql=true
        hibernate.cache.provider_class=org.hibernate.cache.NoCacheProvider
        ]]>
        </value>
    </property>
</bean>

谁能发现我为什么出现以下错误？

Answer 1

您使用@Transactional为Dao类添加了注释，但没有为服务类添加注释。该行：

Visitor storedVisitor =
    (Visitor) sessionFactory.getCurrentSession().get(Visitor.class,
            visitorDetails.getTfscNumber(), LockMode.NONE);

要求您进行交易。

您可以通过将@Transactional批注添加到ProfileService类，或者只添加registerVisitor（）方法来解决此问题。