EntityManager is Null inside Constructor

[saeediqbal1]

Please refer to http://jira.jboss.org/jira/browse/EJBTHREE-665

We are facing the same issue.

When we call a method inside the constructor, and that method has a entitymanager.createQuery or anything with entitymanager, it returns nullpointerexception. It never gets initialized.

Is there any fix for this?

Thanks,
-si

[blabno]

As far as I know, injection occurs after creation of object, so injected resources may not be used during construction. Make init() method and annotate it with @PostConstruct.

[pmuir]

Are you injecting using @In or @PersistenceContext?

[saeediqbal1]

 @PersistenceContext
 private EntityManager entityManager;
 private List<CorpCustomers> existingData;
 public void fillExistingData()
 {
 existingData = entityManager.createQuery("select c from CorpCustomers c where c.context = :con") .setParameter("con", "_574555XXXX") .getResultList();
 }

and in the constructor i am trying to call this fillExistingData() method

[cyberanto]

do not initialize seam beans in the constructor; you will run into all kinds of troubles when you do this (I did :)

instead, use the annotation @PostConstruct for your fillExistingData() method

[cyberanto]

sorry for the repeat of information, didnt read blabno's post before

[saeediqbal1]

ok Thanks cyberanto

[ericjava]

Yes, if you think about it, there's no way injection could occur before the constructor. There's no object to inject into!

In all my Seam managed components, the constructor does little or nothing beyond setting default values for some fields.

You can use the @Create annotation (I believe it is) to run some method after construction and injection have occureed.