[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-1108) Loosen restrictions around @PersistenceContext

[Michael Youngstrom (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBSEAM-1108?page=comments#action_12357395 ] 
            
Michael Youngstrom commented on JBSEAM-1108:
--------------------------------------------

One way to loosen this constraint and the @Synchronized constraint JBSEAM-1077 might be to create a "strict" flag in component that SpringComponent could override to remove these checks. 

> Loosen restrictions around @PersistenceContext
> ----------------------------------------------
>
>                 Key: JBSEAM-1108
>                 URL: http://jira.jboss.com/jira/browse/JBSEAM-1108
>             Project: JBoss Seam
>          Issue Type: Bug
>    Affects Versions: 1.2.0.GA
>            Reporter: Michael Youngstrom
>             Fix For: 1.3.0.BETA1
>
>
> Spring can utilize the @PersistenceContext annotation in a bean to auto inject an EntityManager.  However, if you create a Spring bean with @PersistenceContext on one of its fields and make it a Seam component Seam assumes that's invalid and throws an exception.  It would be nice if Seam could loosen validation of the @PersistenceContext to better accommodate unconventional uses.
> Caused by: 
> java.lang.IllegalArgumentException: @PersistenceContext may only be used on session bean or message driven bean components: userService
> 	at org.jboss.seam.Component.initMembers(Component.java:663)
> 	at org.jboss.seam.Component.<init>(Component.java:253)
> 	at org.jboss.seam.Component.<init>(Component.java:203)
> 	at org.jboss.seam.ioc.IoCComponent.<init>(IoCComponent.java:56)
> 	at org.jboss.seam.ioc.spring.SpringComponent.<init>(SpringComponent.java:152)
> 	at org.jboss.seam.ioc.spring.SpringComponent.addSpringComponent(SpringComponent.java:82)
> 	at org.jboss.seam.ioc.spring.SeamNamespaceHandler$SeamComponentBeanDefinitionDecorator.decorate(SeamNamespaceHandler.java:186)
> 	at org.springframework.beans.factory.xml.NamespaceHandlerSupport.decorate(NamespaceHandlerSupport.java:106)
> 	at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.decorateIfRequired(BeanDefinitionParserDelegate.java:1142)
> 	at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.decorateBeanDefinitionIfRequired(BeanDefinitionParserDelegate.java:1132)
> 	at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.processBeanDefinition(DefaultBeanDefinitionDocumentReader.java:237)
> 	at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseDefaultElement(DefaultBeanDefinitionDocumentReader.java:151)
> 	at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:130)
> 	at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:90)
> 	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:458)
> 	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:353)
> 	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303)
> 	at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:280)
> 	at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:131)
> 	at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:147)
> 	at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:124)
> 	at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:92)
> 	at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:100)
> 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:298)
> 	at org.jboss.seam.ioc.spring.ContextLoader.startupContextLoader(ContextLoader.java:59)
> 	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:585)
> 	at org.jboss.seam.util.Reflections.invoke(Reflections.java:20)
> 	at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:123)
> 	at org.jboss.seam.Component.callComponentMethod(Component.java:1834)
> 	at org.jboss.seam.Component.callCreateMethod(Component.java:1757)
> 	at org.jboss.seam.Component.newInstance(Component.java:1746)
> 	at org.jboss.seam.contexts.Lifecycle.startup(Lifecycle.java:175)
> 	at org.jboss.seam.contexts.Lifecycle.endInitialization(Lifecycle.java:145)
> 	at org.jboss.seam.init.Initialization.init(Initialization.java:504)
> 	at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:33)

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