[jboss-jira] [JBoss JIRA] Commented: (JBAS-7218) ENC EM injection erroneously happens only once for web modules

[henk de boer (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBAS-7218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12529686#action_12529686 ] 

henk de boer commented on JBAS-7218:
------------------------------------

I agree this is low priority (after all, who actually obtains an EM like this?), but isn't this simply a requirement from the Java EE spec? Shouldn't JBoss AS at least print or state a warning somewhere that it isn't spec compliant at this point?

> ENC EM injection erroneously happens only once for web modules
> --------------------------------------------------------------
>
>                 Key: JBAS-7218
>                 URL: https://jira.jboss.org/jira/browse/JBAS-7218
>             Project: JBoss Application Server
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: JBossAS-5.1.0.GA
>         Environment: Observed problem on Mac OS X 10.5.7 and Debian Lenny 64 bits using JDK 6 
>            Reporter: henk de boer
>            Assignee: Emmanuel Bernard
>             Fix For: Unscheduled
>
>
> Using a persistence-context-ref element in the web.xml of a web module, it appears that this causes an EntityManager instance to be injected only once into the ENC of this component.
> However, the EJB 3.0 spec states in section 16.2.1:
> "In general, lookups of objects in the JNDI java: namespace are required to return a new instance of the requested object every time."
> So the observed behavior seems to violate the spec. In addition, this is particularly troublesome since an EntityManager is explicitly not thread-safe. Using the same EM instance for simultaneous requests therefor doesn't work. 
> Of course there are several other methods to obtain an EM reference, for instance binding an EM factory directly to JNDI and using that to obtain the reference.

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