Inject a EJB into a JSF converter with JEE6

Question

I have a stateless EJB that acceses my database. I need this bean in a JSF 2 converter to retreive an entity object from the String value parameter. I'm using JEE6 with Glassfish V3.

@EJB annotation does not work and gets a NPE, because it's in the faces context and it has not access to the EJB context.

My question is: Is it still possible to Inject this bean with a @Resource or other annotation, or a JNDI lookup, or do I need a workaround?

Solution

Do a JNDI lookup like this:

  try {
   ic = new InitialContext();
   myejb= (MyEJB) ic
     .lookup("java:global/xxxx/MyEJB");   
  } catch (NamingException e) {
   e.printStackTrace();
  }

score 6 · Accepted Answer · answered Jan 07 '10 at 10:41

6

I never used JSF 2.0 (only 1.0), but chapter 5.4 of the spec says:

[...] allow the container to inject references to container managed resources into a managed bean instance before it is made accessible to the JSF application. Only beans declared to be in request, session, or application scope are eligble for resource injection.

But so far I understand, a JNDI lookup should do the trick.

answered Jan 07 '10 at 10:41

ewernli

36,434
4
82
119

JNDI lookup doesn't work. I tried @EJB(mappedName="java:global/myProject/myEJB") where the value is the one that glassfish outputs in console as "portable JNDI name" of my EJB while deploying – Michael Bavin Jan 07 '10 at 10:54
2

don't use @EJB annotation. Get the target component using InitialContext. – Bozho Jan 07 '10 at 10:57
@Bozho: InitialContext worked! :) Thankyou – Michael Bavin Jan 07 '10 at 13:06
3

@bugspy.net: still hanging in the ol' J2EE days with lot of ignorance? – BalusC Jan 07 '10 at 16:21

score 2 · Answer 2 · answered Jan 31 '10 at 09:19

Other (yet not so pretty) solution may be using binding instead of converterId. Using JSF managed beans only:

<f:converter binding="#{app.personConverter}" />

Where appBean stands for something like: @ManagedBean(name="app") @ApplicationScoped class AppBean { @EJB private PersonService ps; private Converter personConverter; }

There MAY be a nicer solution in CDI-style (JSR-299) but i've failed to make this one running:

<f:converter binding="#{cdiBean}" />

Where cidBean ought to be: @Named class CdiBean implements Converter { @EJB ... }

Fails with 'Default behavior invoked of requiring a converter-id passed in the constructor'

Anyhow first approach using binding and app scoped JSF bean works.

score 2 · Answer 3 · answered Jun 14 '10 at 22:29

2

The Seam Faces extension for JSF 2.0 and CDI allows @Inject support directly in Validators and Converters.

Check it out: http://ocpsoft.com/java/seam-faces-3-0-0-alpha2-jsf-2-0-just-got-even-easier/

answered Jun 14 '10 at 22:29

Lincoln

3,027
15
22

Michele Mariotti · Answer 4 · 2012-11-12T17:37:59.840

2

i don't know if this solution is pretty... but it does work:

@ManagedBean
public class AcquisitionConverter implements Converter
{
    @EJB
    private AcquisitionService service;

    @Override
    public Object getAsObject(FacesContext context, UIComponent component, String value)
    {
        ...
    }

    @Override
    public String getAsString(FacesContext context, UIComponent component, Object value)
    {
        ...
    }
}

and

<h:inputText value="#{flowController.acquisition}" converter="#{acquisitionConverter}">

with jsf 2.1.3 (mojarra) and glassfish 3.1.1

edited Nov 12 '12 at 17:37

answered Jan 19 '12 at 00:36

Michele Mariotti

6,983
4
37
69

The `@FacesConverter` annotation is by the way superflous in this construct (and only confusing to starters). Remove it. – BalusC Nov 12 '12 at 11:45
the converter="#{acquisitionConverter}" was the things that didnt work for me – Juan Diego Feb 15 '14 at 16:24
I finally managed to get it working with `@Named @ApplicationScope` on the converter, the trick was to create an `@FacesConfig(version = FacesConfig.Version.JSF_2_3) @ApplicationScoped ApplicationConfig` class, that triggers JSF to look for the CDI beans, otherwise it didn't work even though faces-config.xml had version=2.3 – Justin Rowe Jan 13 '21 at 11:19

Inject a EJB into a JSF converter with JEE6

4 Answers4

Linked