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

Magnus Heino (JIRA) jira-events at lists.jboss.org
Fri Jun 29 06:50:58 EDT 2007 

seam:component intercept uses Seam standard rules by default
------------------------------------------------------------

                 Key: JBSEAM-1583
                 URL: http://jira.jboss.com/jira/browse/JBSEAM-1583
             Project: JBoss Seam
          Issue Type: Bug
          Components: Spring
    Affects Versions: 2.0.0.BETA1
            Reporter: Magnus Heino


>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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