[seam-issues] [JBoss JIRA] Commented: (JBSEAM-1583) seam:component intercept uses Seam standard rules by default

Gaurav Saini (JIRA) jira-events at lists.jboss.org
Tue Mar 30 02:13:37 EDT 2010


    [ https://jira.jboss.org/jira/browse/JBSEAM-1583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12522733#action_12522733 ] 

Gaurav Saini commented on JBSEAM-1583:
--------------------------------------

I'm working on Spring-Seam hybrid application. I'm using Seam's @Logger feature for logging in my application. It's working perfectly in Seam components and Spring beans declared with <seam:component> tag, except the Spring beans from which transaction is started.

I'm using spring declartive transaction feature using AOP. I'm using CGLIB proxies instead of JDK dynamic proxies.

I have noticed that in my backing bean where I have injected that aop proxied beans, the logger is available in that proxy. I have inspected the proxy to confirm this. But once the control is moved to any method inside that proxied bean, the logger set to null.

Please help me out. I'm totally stuck and don't want to use Logger.getLog() at all. 

> seam:component intercept uses Seam standard rules by default
> ------------------------------------------------------------
>
>                 Key: JBSEAM-1583
>                 URL: https://jira.jboss.org/jira/browse/JBSEAM-1583
>             Project: Seam
>          Issue Type: Bug
>          Components: Spring
>    Affects Versions: 2.0.0.BETA1
>            Reporter: Magnus Heino
>            Assignee: Michael Youngstrom
>             Fix For: 2.0.0.CR1
>
>
> From spring-seam-2.0.xsd, intercept:
> Determines whether Seam interceptors should be wrapped around a bean, by overriding Seam's default rules. 
> Seldom do you want the seam interceptors wrapped around a sprig singleton.  Auto will use choose no
> interception for a singleton and use Seam standard rules otherwise.
> Looking at the code, I can't find anything about this "no interception for a singleton" default. 
> This bean
> <bean id="processRepository" class="se.lantmateriet.wfl.dataaccess.WsProcessRepository">
>     	<constructor-arg value="http://localhost/avtal/avtalservice.asmx"/>
>     	<seam:component/>
>     </bean>
> fails like this:
> 12:45:35,203 DEBUG [ProxyUtils] Creating proxy for Spring Seam component 'processRepository' using class: se.lantmateriet.wfl.dataaccess.WsProcessRepository
> 12:45:35,282 INFO  [DefaultListableBeanFactory] Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory at 8c2d94: defining beans [org.jboss.seam.ioc.spring.seamComponentPostProcessor,processRepository]; root of factory hierarchy
> 12:45:35,297 ERROR [[/wfl-seam]] Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener
> org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processRepository' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Initialization of bean failed; nested exception is org.jboss.seam.InstantiationException: Could not instantiate Seam component: processRepository
> 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:430)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:255)
> 	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:156)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:252)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
> 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:287)
> 	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:689)
> 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:358)
> 	at org.jboss.seam.ioc.spring.ContextLoader.startupContextLoader(ContextLoader.java:64)
> 	at org.jboss.seam.ioc.spring.ContextLoader.create(ContextLoader.java:43)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
> 	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:124)
> 	at org.jboss.seam.Component.callComponentMethod(Component.java:1957)
> 	at org.jboss.seam.Component.callCreateMethod(Component.java:1880)
> 	at org.jboss.seam.Component.newInstance(Component.java:1859)
> 	at org.jboss.seam.contexts.Contexts.startup(Contexts.java:304)
> 	at org.jboss.seam.contexts.Contexts.startup(Contexts.java:278)
> 	at org.jboss.seam.contexts.ServletLifecycle.endInitialization(ServletLifecycle.java:98)
> 	at org.jboss.seam.init.Initialization.init(Initialization.java:508)
> 	at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34)
> 	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3854)
> 	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4359)
> 	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:761)
> 	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:741)
> 	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:553)
> Caused by: org.jboss.seam.InstantiationException: Could not instantiate Seam component: processRepository
> 	at org.jboss.seam.Component.newInstance(Component.java:1853)
> 	at org.jboss.seam.Component.getInstance(Component.java:1756)
> 	at org.jboss.seam.Component.getInstance(Component.java:1735)
> 	at org.jboss.seam.Component.getInstance(Component.java:1729)
> 	at org.jboss.seam.ioc.spring.SeamComponentPostProcessor.postProcessAfterInitialization(SeamComponentPostProcessor.java:49)
> 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:314)
> 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1184)
> 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:407)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:255)
> 	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:156)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:252)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
> 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:287)
> 	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:689)
> 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:358)
> 	at org.jboss.seam.ioc.spring.ContextLoader.startupContextLoader(ContextLoader.java:64)
> 	at org.jboss.seam.ioc.spring.ContextLoader.create(ContextLoader.java:43)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
> 	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:124)
> 	at org.jboss.seam.Component.callComponentMethod(Component.java:1957)
> 	at org.jboss.seam.Component.callCreateMethod(Component.java:1880)
> 	at org.jboss.seam.Component.newInstance(Component.java:1859)
> 	at org.jboss.seam.contexts.Contexts.startup(Contexts.java:304)
> 	at org.jboss.seam.contexts.Contexts.startup(Contexts.java:278)
> 	at org.jboss.seam.contexts.ServletLifecycle.endInitialization(ServletLifecycle.java:98)
> 	at org.jboss.seam.init.Initialization.init(Initialization.java:508)
> Caused by: java.lang.InstantiationException: se.lantmateriet.wfl.dataaccess.WsProcessRepository_$$_javassist_0
> 	at java.lang.Class.newInstance0(Class.java:340)
> 	at java.lang.Class.newInstance(Class.java:308)
> 	at org.jboss.seam.ioc.ProxyUtils.enhance(ProxyUtils.java:71)
> 	at org.jboss.seam.ioc.IoCComponent.instantiateJavaBean(IoCComponent.java:94)
> 	at org.jboss.seam.Component.instantiate(Component.java:1154)
> 	at org.jboss.seam.Component.newInstance(Component.java:1849)
> 	at org.jboss.seam.Component.getInstance(Component.java:1756)
> 	at org.jboss.seam.Component.getInstance(Component.java:1735)
> 	at org.jboss.seam.Component.getInstance(Component.java:1729)
> 	at org.jboss.seam.ioc.spring.SeamComponentPostProcessor.postProcessAfterInitialization(SeamComponentPostProcessor.java:49)
> 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:314)
> 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1184)
> 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:407)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:255)
> 	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:156)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:252)
> 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
> 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:287)
> 	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:689)
> 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:358)
> 	at org.jboss.seam.ioc.spring.ContextLoader.startupContextLoader(ContextLoader.java:64)
> 	at org.jboss.seam.ioc.spring.ContextLoader.create(ContextLoader.java:43)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
> 	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:124)
> 	at org.jboss.seam.Component.callComponentMethod(Component.java:1957)
> 	at org.jboss.seam.Component.callCreateMethod(Component.java:1880)
> If I change <seam:component/> to <seam:component intercept="false"/> everything works.
> 1. Default for stateless spring beans seems to be true since seam standard rules are applied if intercept is null, that is not defined. bug?
> 2. Why would I want to use intercept="true" anyway? What interceptors will be added?
> 3. Why is it failing with intercept="true"?

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