Spring session="scope"

[samuel john]

Hi All,

am new to Spring framework, we are working on a project using Spring+BlazeDS+Flex.
So far integration with flex went through with out any issues.

We tried to use HttpSession to maintain userPreferences and found this link where by setting scope="session" will sort our needs.

but unfortunately we are facing below exception:

20:44:44,818 ERROR [STDERR] java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext
20:44:44,819 ERROR [STDERR] at org.springframework.context.support.AbstractRefreshableApplicationContext.getBeanFactory(AbstractRefreshableApplicationContext.java:171)
20:44:44,819 ERROR [STDERR] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1075)
20:44:44,819 ERROR [STDERR] at com.lynx.saw.spring.global.dao.GlobalLoggedIn.isLoggedIn(GlobalLoggedIn.java:43)
20:44:44,819 ERROR [STDERR] at com.lynx.saw.spring.login.dao.LoginDAO.createMenu(LoginDAO.java:157)
20:44:44,819 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
20:44:44,819 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
20:44:44,820 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
20:44:44,820 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:597)
20:44:44,820 ERROR [STDERR] at flex.messaging.services.remoting.adapters.JavaAdapter.invoke(JavaAdapter.java:421)
20:44:44,820 ERROR [STDERR] at flex.messaging.services.RemotingService.serviceMessage(RemotingService.java:183)
20:44:44,826 ERROR [STDERR] at flex.messaging.MessageBroker.routeMessageToService(MessageBroker.java:1503)
20:44:44,826 ERROR [STDERR] at flex.messaging.endpoints.AbstractEndpoint.serviceMessage(AbstractEndpoint.java:884)
20:44:44,826 ERROR [STDERR] at flex.messaging.endpoints.amf.MessageBrokerFilter.invoke(MessageBrokerFilter.java:121)
20:44:44,826 ERROR [STDERR] at flex.messaging.endpoints.amf.LegacyFilter.invoke(LegacyFilter.java:158)
20:44:44,826 ERROR [STDERR] at flex.messaging.endpoints.amf.SessionFilter.invoke(SessionFilter.java:44)
20:44:44,826 ERROR [STDERR] at flex.messaging.endpoints.amf.BatchProcessFilter.invoke(BatchProcessFilter.java:67)
20:44:44,827 ERROR [STDERR] at flex.messaging.endpoints.amf.SerializationFilter.invoke(SerializationFilter.java:146)
20:44:44,827 ERROR [STDERR] at flex.messaging.endpoints.BaseHTTPEndpoint.service(BaseHTTPEndpoint.java:278)
20:44:44,827 ERROR [STDERR] at org.springframework.flex.messaging.servlet.MessageBrokerHandlerAdapter.handle(MessageBrokerHandlerAdapter.java:79)
20:44:44,827 ERROR [STDERR] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
20:44:44,827 ERROR [STDERR] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
20:44:44,827 ERROR [STDERR] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
20:44:44,828 ERROR [STDERR] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
20:44:44,828 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
20:44:44,828 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
20:44:44,828 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
20:44:44,828 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:44:44,828 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
20:44:44,828 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:44:44,829 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:44:44,829 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
20:44:44,829 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
20:44:44,829 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
20:44:44,829 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
20:44:44,829 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
20:44:44,829 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
20:44:44,829 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
20:44:44,829 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
20:44:44,829 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
20:44:44,830 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
20:44:44,830 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
20:44:44,830 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
20:44:44,830 ERROR [STDERR] at java.lang.Thread.run(Thread.java:619)


Below code is generating the exception:

public UserBean isLoggedIn() throws AppsSessionException
    {
    	UserBean user = new UserBean();
    	
    	
    	 XmlWebApplicationContext ctx = new XmlWebApplicationContext() {
             public String[] getConfigLocations() {
                 return new String[]{IConstants.APPATH};
                 //IConstants.APPATH="WEB-INF/config/web-application-config.xml"
             }
    	 };         

    	try {
    		user = (UserBean)ctx.getBean("userBean");	        
    	
		} catch (NullPointerException e) {
			//throw new AppsSessionException("SESSION EXPIRED");
			e.printStackTrace();
		}
		return user;
    }

Part of web-application-config.xml :

...
<bean id="userBean" class="com.tri.saw.spring.user.bean.UserBean"  scope="session">
		  <aop:scoped-proxy/>
	</bean>	
	
	<bean id="userPreference" class="com.tri.saw.spring.user.bean.UserPreference"  scope="session">
		 <property name="userBean" ref="userBean"></property>
	</bean>	

Kindly correct me if at all am doing some thing wrong.


Thanks
Sam

[samuel john]

Hi All,

Have tried changing this in my applicationContext files as

<bean id="userBean" class="com.lynx.saw.spring.user.bean.UserBean"  scope="session">
		  <aop:scoped-proxy/>
	</bean>			
		
	<bean id="globalLoggedIn" class="com.lynx.saw.spring.global.dao.GlobalLoggedIn">
		<property name="userBean" ref="userBean"></property>
	</bean>

But the user Object returned in class GlobalLoggedIn is NULL. Kindly correct me if at all am missing any thing

Thanks again
Sam

[samuel john]

Sorry all, just noticed have posted title wrongly as session="scope" instead of scope="session".

[Tommy Delson]

Try to take out " <aop:scoped-proxy/>" since your "userPreference" bean is declared as "singleton".

See and recheck Spring document for details....


Here is the recap from Spring doc if you missed:

Note

You do not need to use the <aop:scoped-proxy/> in conjunction with beans that are scoped as singletons or prototypes. It is an error to try to create a scoped proxy for a singleton bean (and the resulting BeanCreationException will certainly set you straight in this regard).