Using a request scoped bean outside of an actual web request

问题

I have a web application that has a Spring Integration logic running with it in a separated thread. The problem is that at some point my Spring Integration logic tries to use a request scoped bean and then i get the following errors:

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.tenantContext': Scope 'request' 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.


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.

I have the ContextLoaderListener set:

<listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>

My Scoped Bean is annotated like that(since I heard that proxing my bean would help):

@Component
@Scope(value = "request", proxyMode = ScopedProxyMode.TARGET_CLASS)  
public class TenantContext  implements Serializable {

Is what I'm doing possible? If yes, what am I missing here? If no, any other suggestions on how I can achieve that?

回答1:

You can only use request (and session) -scoped beans on the web container thread on which the request is running.

I presume that thread is waiting for an async reply from your SI flow?

If so, you can bind the request-scoped bean to the message, perhaps in a header, or somewhere in the payload.

回答2:

For Spring 4 Frameworks add servletContext.addListener(new RequestContextListener());

public class WebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[] { RootConfiguration.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[] { WebMvcConfiguration.class };
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

    @Override
    protected Filter[] getServletFilters() {
        return new Filter[] { new HiddenHttpMethodFilter() };
    }

    **@Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        super.onStartup(servletContext);
        servletContext.addListener(new RequestContextListener());
    }**
}

回答3:

Use RequestContextFilter with the property threadContextInheritable set to true. This makes the child thread to inherit the parent's context, which contains the request object itself. Also make sure that the executor doesn't reuse the threads in the pool, because the request object is very specific to that request and cannot be shared across various requests. One such executor is SimpleAsyncTaskExecutor.

For more info refer Scope 'session' is not active for the current thread; IllegalStateException: No thread-bound request found.

来源：https://stackoverflow.com/questions/17424739/using-a-request-scoped-bean-outside-of-an-actual-web-request

标签

Spring

spring-aop

spring-integration