春季Web服务中的Hibernate会话处理 [英] Hibernate session handling in spring web services

问题描述

我使用spring-ws与Jaxb2Marshaller，PayloadRootAnnotationMethodEndpointMapping和GenericMarshallingMethodEndpointAdapter通过@Endpoint和@PayloadRoot注释配置我的Web服务。

当我尝试使用我的项目的DAO的我能够从数据库中加载对象，但只要我尝试访问我的服务中应该延迟加载的属性，我得到一个org.hibernate.LazyInitializationException - 无法初始化代理 - 没有会话。

在我的spring-mvc web应用程序中，OpenSessionInViewInterceptor处理会话。如何将我的Web服务项目配置为为每个Web服务调用自动创建一个Hibernate会话？

解决方案

与此同时，我找到了解决方案。这个论坛条目给了我提示：

http://forum.springframework.org/showthread.php?t=50284

基本上，我将@Transactional注释添加到了我的web服务实现类。棘手的部分是告诉spring使用原来的类（不是由tx：annotation驱动创建的代理），这是我通过使用以下配置实现的：

 < bean class =org.springframework.ws.server.endpoint.mapping.PayloadRootAnnotationMethodEndpointMapping> 
< property name =ordervalue =1/> 
< / bean> 
 
< tx：annotation-driven mode =proxyorder =200proxy-target-class =true/> 
  

配置语句的顺序也很重要。

I am using spring-ws with Jaxb2Marshaller, PayloadRootAnnotationMethodEndpointMapping and GenericMarshallingMethodEndpointAdapter to configure my web services via the @Endpoint and @PayloadRoot annotations.

When I try to use the DAO's of my project I am able to load objects from the database but as soon as I try to access properties inside my service that should be lazily loaded I get a org.hibernate.LazyInitializationException - could not initialize proxy - no Session.

In my spring-mvc web application the OpenSessionInViewInterceptor handles the sessions. How do I configure my web service project to automatically create a Hibernate session for every web service call?

解决方案

In the meanwhile I found a solution. This forum entry gave me the hint:

http://forum.springframework.org/showthread.php?t=50284

Basically I added the @Transactional annotations to my web service implementation class. The tricky part was to tell spring to use the original class (not the proxy created by tx:annotation-driven) which I achieved by using the following configuration:

<bean class="org.springframework.ws.server.endpoint.mapping.PayloadRootAnnotationMethodEndpointMapping" >
    <property name="order" value="1" />
</bean>

<tx:annotation-driven mode="proxy" order="200" proxy-target-class="true" />

The order of the configuration statements seems important too.

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