@EJB injected from another can

Question

I am trying to enter a bean located in another jar file, and then the bean that I am trying to enter. Both beans are just basic @Stateless beans with local and remote interfaces. If i use normal injection

@EJB IBean injectedBean; 

or

 @EJB IBeanLocal injectedBean; 

I get a NullPointerException when deploying the application.

If I use:

 @EJB(mappedName="Bean") IBean injectedBean; 

or

 @EJB(mappedName="Bean") IBeanLocal injectedBean; 

everything works, and JBoss does not create deployment errors.

Maybe I'm using JBoss 5.

The bean class that I introduced is declared as:

 @Remote public interface IBean @Local public interface IBeanLocal extends IBean @Stateless(name = "Bean") public class Bean implements IBean, IBeanLocal 

My problem is that, as stated in the documentation, the mappedName property is vendor-specific. Is there any other way I can get this to work?

SOLVE:

I managed to solve the problem.

The problem was that I tried to deploy both banks separately, which meant that everyone would get their own ClassLoader in JBoss so that they could not find each other and throw a NullPointerException when trying to insert a bean.

It was decided to add cans to the ear and add META-INF containing application.xml, which looks like this:

 <application xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_1_4.xsd" version="1.4"> <display-name>Simple example of application</display-name> <module> <ejb>ejb1.jar</ejb> </module> <module> <ejb>ejb2.jar</ejb> </module> </application> 

I also had to modify some JNDI searches that I did to fit the new structure by adding an ear name in front of the classes: "ear-name / bean"

After that, I just added cans to my ear, and everything was fine.

Answer 1

You need to declare a local interface so that JBoss finds the bean only based on the interface (assuming you are using EJB 3.0):

 @Stateless(name = "Bean") @Local ( IBeanLocal.class ) @Remote ( IBean.class ) public class Bean implements IBean, IBeanLocal { ... } 

Edit: IBean is a remote interface (see comment).

Answer 2

Try entering bean with @EJB(beanName = "Bean")

Not sure if this will work, but we had a similar problem and this was caused by the lack of the beanName attribute.