[
http://jira.jboss.com/jira/browse/JBSEAM-1583?page=comments#action_12367439 ]
Magnus Heino commented on JBSEAM-1583:
--------------------------------------
No, nothing is missing from the stacktrace.
Found the problem, if intercept is true, my class needs to have a no arg constructor. It
did not have that since I was using constructor injection. What is the empty constructor
needed for here? You said that the seam bean and the spring bean was the same actual
instance... so the empty constructor bean is created for what reason? The bean when in use
is configured correct, so the constructor injected instance is the one being used...
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
Assigned To: Michael Youngstrom
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@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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