@EJB doing nothing - jboss-4.2.2.GA

[Varun Chopra]

I have a stateless session bean and a servlet. I have declared a private variable like below in servlet:

	@EJB				
	private MySBeanLocal mySessionBean;//MySBeanLocal is the session bean interface

But above code is doing nothing. Servlet is in a .war module, ejb is in a .jar module and both are in same ear file.
When mySessionBean is accessed in a method nullpointerexception is thrown. Basically mySessionBean is never set. Can anybody help here?

[Jaikiran Pai]

Injection of EJB in a servlet is not supported in JBoss-4.2.x. You will have to use JBoss-5.0 GA for this.

[Varun Chopra]

Thanks.

[Varun Chopra]

With JBOss 4.2.2 I looked up the EJB programmatically and it worked.
Now I have installed JBoss 5, and I am trying to inject ejb and EntityManager in servlet as below:

	@PersistenceContext(unitName="exalt_JPAOverHibernate_PersistenceProperties")
	private EntityManager em;

	@EJB (mappedName=ParameterSearchLocal.JNDI_NAME_LOCAL)				
	private ParameterSearchLocal parameterSearchBean;

But above variables are never set.
Do I have to configure anything in JBoss 5 to enable auto injection? There's not exception either.

[Jaikiran Pai]

I guess you are not using version 2.5 of the web_app xsd in your web.xml. You will need this for the injection to take place:

<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">					

[Varun Chopra]

I was not using that. But even after its use, this is not working.
Note that this is a project with several EJBs from ejb 2.1. I upgraded one to EJB 3. EJB 2.1's are packaged in ejb2.1.jar and this single EJB 3 with its local interface is packaged in ejb3.jar. ejb2.1 beans are working fine. Even ejb3 bean works fine if I explicitly look it up. Only DI is not working in servlet when I try to inject ejb3.

I have not defined <ejb-ref > tag for EJB 3 session bean in web.xml. Is that necessary? I guess it should not be because explicit lookup finds it and I am able to use it. Any more hints?

[Varun Chopra]

My mistake, it is working now with above change in web.xml, Thanks