如何在多次请求页面时阻止抛出LazyInitializationExceptions?如果我只是在我的webapp中的页面上按住Ctrl-R,我会一直在我的日志文件中收到此消息。
我在servlet.xml文件中配置了以下拦截器:
<mvc:interceptors>
<bean
class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor" />
</mvc:interceptors>
然而,我经常收到以下错误:
2011-09-23 15:14:28,854 [http-8080-23] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/web-app].[springmvc] - Servlet.service() for servlet springmvc threw exception
org.hibernate.LazyInitializationException: illegal access to loading collection
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:111)
at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186)
注意:在拦截器上开启登录我清楚地看到它正在被调用并打开/关闭交易:
2011-09-23 15:36:53,229 [http-8080-5] DEBUG org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - Opening single Hibernate Session in OpenSessionInViewInterceptor
2011-09-23 15:36:53,229 [http-8080-5] WARN eqip.core.springmvc.extensions.interceptors.AbstractAgencyDataInterceptor IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - Pre handle: http://134.167.141.34:8080/web-app/main.xhtml Status: 200
2011-09-23 15:36:53,511 [http-8080-5] WARN org.hibernate.engine.StatefulPersistenceContext.ProxyWarnLog IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - 缩小代理到班级core.model.entities.Subclass - 此操作中断== 2011-09-23 15:36:53,511 [http-8080-5] WARN org.hibernate.engine.StatefulPersistenceContext.ProxyWarnLog IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - 将代理缩小到类core.model .entities.Subclass - 此操作中断== 2011-09-23 15:36:53,916 [http-8080-5] DEBUG org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - 刷新单个Hibernate会话的OpenSessionInViewInterceptor 2011-09-23 15:36:53,916 [http-8080-5] DEBUG org.springframework.web.servlet.DispatcherServlet IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - 渲染视图[eqip.core。 springmvc.extensions.velocity.VelocityToolsLayoutView:name'swages / myEqip';名为“springmvc”的DispatcherServlet中的URL [pages / main.xhtml]] 2011-09-23 15:36:54,213 [http-8080-5] DEBUG eqip.core.springmvc.extensions.velocity.VelocityToolsLayoutView IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - 渲染屏幕内容模板[页/ main.xhtml] 2011-09-23 15:36:54,384 [http-8080-5] DEBUG org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor IP134.167.141.34 CV#ef955014-cc9d-42fc P#75004 - 关闭单个Hibernate会话的OpenSessionInViewInterceptor
使用Spring 3.0.5,Hibernate 3.6.5,速度1.7
最终修复:将以下内容添加到控制器声明中:
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
这使我们能够继续使用我们的拦截器,并确保我们在每次请求时都获得了预装件的新副本。
答案 0 :(得分:0)
您确定实际调用了拦截器类吗?获取源代码,并对其进行调试以查看执行是否实际到达它。确保在spring mvc配置中确实已将拦截器声明为拦截器:
<bean id="urlMapping"class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="interceptors">
<list>
<ref bean="openSessionInViewInterceptor"/>
</list>
</property>
<property name="mappings">
</bean>
或者您可以使用更简单的OpenSessionInVIewFilter,它只需要配置为拦截/ *的servlet过滤器(或通用的enoug URL以包含处理hibernate实体的所有控制器的URL)。
答案 1 :(得分:0)
可能是你在会话中保存了一些hibernate对象,这些对象可能有未初始化的代理。
每次按Ctrl + R,新请求都会打开,并且无法在当前请求期间初始化上一个请求中的代理对象,并且结果LazyInitializationException
异常会引发。
如果不是这种情况,那么试着朝这个方向挖掘它。
答案 2 :(得分:0)
写一个类,如: -
public class CustomHibernateSessionViewFilter extends OpenSessionInViewFilter {
protected Session getSession(SessionFactory sessionFactory) throws DataAccessResourceFailureException {
Session session = super.getSession(sessionFactory);
session.setFlushMode(FlushMode.COMMIT);
return session;
}
protected void closeSession(Session session, SessionFactory factory) {
session.flush();
super.closeSession(session, factory);
}
}
在web.xml中声明它如下: -
<filter>
<filter-name>OSIVF Filter</filter-name>
<filter-class>your.path.to.CustomHibernateSessionViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>OSIVF Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>