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https://issues.apache.org/jira/browse/TAP5-2754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Weidig reassigned TAP5-2754:
--------------------------------
Assignee: Ben Weidig
> Some methods of an injected Hibernate Session return null
> ---------------------------------------------------------
>
> Key: TAP5-2754
> URL: https://issues.apache.org/jira/browse/TAP5-2754
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-hibernate
> Affects Versions: 5.7.2, 5.8.2
> Reporter: Ben Weidig
> Assignee: Ben Weidig
> Priority: Major
>
> If you inject the Hibernate Session, some calls might return null.
> Identified problematic methods are:
> * createNativeQuery
> * createQuery
> * getNamedQuery
> It possible that more methods are affected.
> Debugging the issue is complicated, as the Hibernate Session is hidden away
> behind a PropertyShadowBuilder.
> It's a property on org.apache.tapestry5.hibernate.HibernateSessionManager
> that is created in
> org.apache.tapestry5.hibernate.modules.HibernateCoreModule.buildSession(HibernateSessionManager,
> PropertyShadowBuilder)
> The reasoning for this is that the Session doesn't have to be scoped
> PerThread, as the HibernateSessionManager is, and the Session is only
> actually created on first use, not on HSM creation.
> I've debugged through the shadowing process and checked the created
> PlasticClass and underlying ClassNode, and they look good to me as all
> methods are there.
> As everything is runtime-generated bytecode, maybe a tool like
> [https://github.com/AdoptOpenJDK/jitwatch] could help to analyze what's
> actually happening.
> My guess is that the big changes starting Hibernate 5.2 (moving towards
> javax.persistence, like Session now extending javax.persistence.EntityManager
> and org.hibernate.jpa.HibernateEntityManage) are not 100% compatible with
> what Plastic/PropertyShadowBuilder are doing behind the scenes.
> It's not completely broken, but certain things seem to work a little
> differently.
>
> *Current workaround:*
> Call {{getSession()}} on the injected Session, the method will then work as
> intended.
>
> *Maybe related ticket:*
> https://issues.apache.org/jira/browse/TAP5-2582
>
> *Related mailing list threads:*
> [https://lists.apache.org/thread/r4bhr01d95kpl8pslrhr1bdx486b29nd]
> [https://lists.apache.org/thread/qwc6430qq0f4nt7oc755z443c2zh6j68]
>
>
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