Question

Spring: 2.5.6.SEC01

DWR: 2.0.5

I would like to use a session scoped bean from DWR. It works fine, when I configure the bean to be a singleton. I read this tutor:
(http://directwebremoting.org/dwr/server/integration/spring.html)
and modified my applicationContext.xml, but it is still wrong somewhere.

My applicationContext.xml:

http://pastebin.com/m8d57f18

It ork well, but when I use an AJAX function, I get this exception:

11:31:09,593 INFO [DefaultRemoter]
Exec: DBTestAjaxFunc.testJNDI()
11:31:09,609 WARN [DefaultRemoter]
Method execution failed:
org.springframework.beans.factory.BeanCreationException:
Error creating bean with name
‘scopedTarget.dbtestajax’: 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.

It seems, that the aop proxy wasn’t created, but I don’t know why.

Libs in the classpath:

• aspectjrt.jar
• aspectjweaver.jar
• cglib-nodep-2.2.jar
• dwr.jar
• spring.jar
• spring-aop.jar
• spring-dwr-2.0.xsd
• spring-web.jar
• spring-webmvc.jar

Any idea? (Thanks!)

Answer 1

In order for session- or request-scoped beans to work in Spring, something has to associate the current request and session with the current thread. Normally, this would be done by DispatcherServlet, but if you’re not using that, then you need an alternative.

The alternative in this case is RequestContextListener or RequestContextFilter, either of which you can wire in to your web.xml, and both os which will allow you to use request- and session-scoped beans. Just make sure that you configure them in web.xml so that DWR requests pass through them.