Problem with @SessionAttributes and @ModelAttribute

[gdony]

Hi,

I have in my spring configuration file :

- a bean which is session-scoped

<!-- **************	-->
	<!--	context		-->
	<!-- **************	-->
	<bean id="myBeanInSession" class="blabla.BeanInSession"
	scope="session">
	</bean>

- an interceptor :

<!-- ************ -->
	<!--  interceptor -->
	<!-- ************ -->
	<bean name="securityInterceptor" class="web.interceptor.SecurityInterceptor">
	</bean>

I have annotate-based controllers like this :

@Controller
@SessionAttributes("myBeanInSession")
public class GetContentController {
	
	@RequestMapping(value="/content.get", method=RequestMethod.GET)
	public String get(ModelMap model, @RequestParam("path") String path,
			@RequestParam(value="mode", required=false) String mode,
			@ModelAttribute("myBeanInSession")  BeanInSession myBeanInSession,
			@ModelAttribute("getContent") GetContent getContent) {
...
}

If in the securityInterceptor i put the code :

public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
			Object arg2) throws Exception {
		this.beanFactory.getBean("myBeanInSession");
...
}

I have no problem.

But if I don't add code

this.beanFactory.getBean("myBeanInSession");

in the preHandle method of the interceptor I have the error :

Session attribute "myBeanInSession" required - not found in Session

I also noticed that the instance of myBeanInSession is added in request.getSession().getAttribute("myBeanInSession ") by the method this.beanFactory.getBean("myBeanInSession");

So it seems there is a relation between session-scoped beans, HttpSession.getAttribute() and @SessionAttributes annotation but I don't really understand how it works...

I wonder if it is not because of side effects that my code works but that it would be a better practice not to use @SessionAttributes annotation for referring to session-scoped beans. But then how could i refer session-scoped beans in my annotated controllers methods ?

Thanks

G. Dony

[gdony]

Ok I finally forget @SessionAttributes annotation and HttpSession.getAttributes() or WebRequest.getAttributes().

My session-scoped bean is declared in my spring xml configuration file like this :

<bean id="myBeanInSession" class="blabla.BeanInSession" scope="session">
		<aop:scoped-proxy/>
	</bean>

And in my annotated controller I encapsulate ma session-scoped bean like this :

 private BeanInSession beanInSession;
	
	@Autowired
	public GetContentController(BeanInSession beanInSession) {
		this.beanInSession= beanInSession;
	}

Now I can use my session-scoped bean in any method of my controller.

But I still wonder why when using WebRequest.getAttributes("myBeanInSession" , SESSION_SCOPE) (or HttpSession.getAttribute("myBeanInSession")) the bean is not accessible except after invoking beanFactory.getBean(). Is there a lazy initialisation of session-scoped beans ?