我正在使用Spring框架开发Java webapp。 我需要在用户会话结束时调用webservice：
我实现了一个HttpSessionEventPublisher来通过提供的客户端调用服务：
public class SessionDestroyedListener extends HttpSessionEventPublisher {
/**
* {@inheritDoc}
*/
@Override
public void sessionDestroyed(HttpSessionEvent event) {
// Retrieve managed beans from SessionEvent
HttpSession session = event.getSession();
ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(session.getServletContext());
// This is the session scoped bean : I can access it from the HttpSessionEventPublisher
SessionBean sessionBean = (SessionBean) session.getAttribute("scopedTarget.sessionBean");
// This is the service client : I can access it from the HttpSessionEventPublisher
ServiceClient serviceClient = (ServiceClient) ctx.getBean("serviceClient");
// This is the call that raises an error
serviceClient.callService();
super.sessionDestroyed(event);
}
}
在服务客户端（我无法按照自己的意愿修改它，它由另一个团队提供），会注入会话范围的bean来检索用户身份以进行身份验证：
public class ServiceClientImpl implements ServiceClient {
// This is the injected session bean
@Autowired
private SessionBean sessionBean;
/**
* {@inheritDoc}
*/
@Override
public void callService() {
// The service is called using data from the injected session bean and raises an error
}
}
当用户正确注销时，一切正常，因为我们处于请求上下文中。 但是当会话在会话超时后到期时，我收到以下错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.sessionBean': Scope 'session' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; nested exception is java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:341)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:33)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.getTarget(Cglib2AopProxy.java:653)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:604)
at com.mycompany.myapp.bean.SessionBean$$EnhancerByCGLIB$$c324aab0.getUserId()
at com.mycompany.myapp.client.ServiceClientImpl.callService(ServiceClientImpl.java:165)
Caused by: java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
at org.springframework.web.context.request.RequestContextHolder.currentRequestAttributes(RequestContextHolder.java:131)
at org.springframework.web.context.request.SessionScope.get(SessionScope.java:90)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:327)
... 18 more
是否有解决方法/黑客使用提供的客户端在请求范围之外调用该服务？
修改
马库斯在这个问题中解释了类似的问题：
Autowire session-scoped bean into thread (Spring)
他的最后评论是：
看起来也是在线程外部的submissionDao中手动设置UserInfoBean对象，一切正常。我会接受这个答案，因为它给了我解决问题所需的一切。感谢
出于测试目的，我将SessionBean的setter添加到服务客户端：
public class ServiceClientImpl implements ServiceClient {
// This is the injected session bean
@Autowired
private SessionBean sessionBean;
/**
* {@inheritDoc}
*/
@Override
public void callService() {
// The service is called using data from the injected session bean and raises an error
}
/**
* {@inheritDoc}
*/
@Override
public void setSessionBean(SessionBean sessionBean) {
this.sessionBean = sessionBean;
}
}
在引发异常的方法之前调用了setter：
public class SessionDestroyedListener extends HttpSessionEventPublisher {
/**
* {@inheritDoc}
*/
@Override
public void sessionDestroyed(HttpSessionEvent event) {
// Retrieve managed beans from SessionEvent
HttpSession session = event.getSession();
ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(session.getServletContext());
// This is the session scoped bean : I can access it from session attributes
SessionBean sessionBean = (SessionBean) session.getAttribute("scopedTarget.sessionBean");
// This is the service client : I can access it from spring context
ServiceClient serviceClient = (ServiceClient) ctx.getBean("serviceClient");
// After overriding autowired bean in the service client, no more error
serviceClient.setSessionBean(sessionBean);
serviceClient.callService();
super.sessionDestroyed(event);
}
}
除了工作之外，这一切都不优雅......现在的问题是：