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From Gabriel Belingueres <belingue...@gmail.com>
Subject Re: [Struts2] session variable empty in the JSP
Date Mon, 27 Feb 2012 19:13:54 GMT
You are lacking the <aop:scoped-proxy/> in the bean definition. See
the following link:

http://static.springsource.org/spring/docs/3.0.7.RELEASE/spring-framework-reference/html/beans.html#beans-factory-scopes-other-injection

HTH

2012/2/27 Samuel Robert <samuelrobert.job@gmail.com>:
> I am using Spring:
> *<bean id="context" class="my.bean.SessionBean" scope="session"/>*
>
> In the action:
> *@Autowired
> private SessionBean context;*
>
> I can manipulate the context object in the action, fill it with a list of
> profiles.
>
>
> In the JSP, tags like the following fail (the first time only):
> <s:select name="profile" id="profile" list="%{#session.context.profiles}"/>
>
> The application uses Spring Security and Tiles with the struts-tiles
> plugin.
> The jsp is included via Tiles: <result type="tiles">monitor</result>
>
> I am testing with Jetty.
>
> The stack trace:
> Caused by: tag 'select', field 'list', name 'profile': The requested list
> key '%{#session.context.profiles}' could not be resolved as a
> collection/array/map/enu
> meration/iterator type. Example: people or people.{name} - [unknown
> location]
>        at
> org.apache.struts2.components.Component.fieldError(Component.java:237)
>        at
> org.apache.struts2.components.Component.findValue(Component.java:358)
>        at
> org.apache.struts2.components.ListUIBean.evaluateExtraParams(ListUIBean.java:80)
>        at
> org.apache.struts2.components.Select.evaluateExtraParams(Select.java:105)
>        at
> org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:856)
>        at org.apache.struts2.components.UIBean.end(UIBean.java:510)
>        at
> org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:42)
>        at
> org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp._jspx_meth_s_select_0(org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp:367)
>        at
> org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp._jspx_meth_s_form_0(org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp:313)
>        at
> org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp._jspx_meth_s_if_0(org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp:262)
>        at
> org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp._jspService(org.apache.jsp.jsp.monitor.inc_005fheader_005fmonitoring_jsp:118)
>        at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)
>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>        at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:389)
>        at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486)
>        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380)
>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>        at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
>        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:366)
>        at
> org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:99)
>        at
> org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:97)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:60)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:78)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:35)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:187)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:57)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:109)
>        at
> org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378)
>        at
> org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:167)
>        at
> org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
>        at
> org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
>        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>        at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
>        at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>        at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
>        at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>        at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
>        at org.mortbay.jetty.servlet.Dispatcher.include(Dispatcher.java:192)
>        at
> org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:1013)
>        at
> org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:698)
>        at
> org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:80)
>        ... 132 more
>
>
> On 27 February 2012 16:00, Gabriel Belingueres <belingueres@gmail.com>wrote:
>
>> Post the code in which you actually set the attribute in the session scope.
>>
>> 2012/2/27 Samuel Robert <samuelrobert.job@gmail.com>:
>> > Hi,
>> >
>> > I faced few days ago a problem with the session variable in the JSP. I
>> > posted the problem here but did not get any solution:
>> >
>> http://stackoverflow.com/questions/9381991/session-variable-empty-in-the-jsp-on-first-access-in-a-struts2-spring-applicatio
>> >
>> > Perhaps some of you have an idea.
>> >
>> > Basically the session variable in the JSP is empty on the first call to
>> my
>> > action (when the session gets initialized).
>> > That means that my JSP fails to retrieve any information from the session
>> > in the Struts tags on the first display.
>> > From the second call it is OK.
>> >
>> > I have checked that the session is correctly initialized in the JSP. The
>> > problem comes only with the session variable in the struts tags.
>> >
>> > <%
>> System.out.println(((my.bean.SessionBean)session.getAttribute("context")).getProfiles());
>> > %> => OK
>> >
>> > <s:property value="%{#session}"/> => KO (empty)
>> >
>> > ${session} => KO
>> >
>> >
>> > I solved it by adding an additional redirectAction on the first access
>> > (when I detect that it is a new session).
>> > But I wonder why I get such a problem, which I never had before.
>> >
>> > Thanks,
>> > Samuel
>>
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