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https://issues.apache.org/jira/browse/OWB-534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12999991#comment-12999991
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Matthias Weßendorf commented on OWB-534:
----------------------------------------
Attached is a simple example. It uses my "abstractGenericDao"
unzip the file and run the following command "mvn".
This downloads jetty etc and starts the container on localhost:9090
afterwards point the browser to that URL and use the app to see the OWB bug.
Click the "all" link - or try to create a new employee ==> Both actions fail
due to a NPE in the base DAO class.
================== WORK AROUND ============
Now to make it work.... you could change the EmployeeServiceImpl and replace
this:
<toReplace>
@Inject
private EmployeeDao dao;
//private SimpleEmployeeDao dao;
</toReplace>
with this:
<replacement>
@Inject
private SimpleEmployeeDao dao;
</replacement>
==> This makes it working, but it's not desired to use DAOs like that.
The goal is to make the @PersistenceContext annotation working via abstract
base classes as well (instead of only simple classes)
> Injection of @PersistenceContext does not work with abstract/base classes
> -------------------------------------------------------------------------
>
> Key: OWB-534
> URL: https://issues.apache.org/jira/browse/OWB-534
> Project: OpenWebBeans
> Issue Type: Bug
> Components: Injection and Lookup
> Affects Versions: 1.0.0
> Reporter: Matthias Weßendorf
> Assignee: Gurkan Erdogdu
> Priority: Critical
> Attachments: OWB-534.zip
>
>
> I am using an "AbstractGenericDao" class for all of my DAOs.
> In there I use @PersistenceContext(unitName = "myUnit") to inject the
> EntityManager
> The concrete DAO (e.g. EmployeeDao (which extends AbstractGenericDao)) is
> inject (via @Inject) to a Service IMPL.
> Now, when executing some logic on that DAO, where it delegates to the
> EntityManager (e.g. em.persist(...);) I am getting a NullPointerException,
> indicating that the EntityManager is NULL
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