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Clarification on a mock question about Session Bean

germano giudici
Greenhorn

Joined: Dec 01, 2008
Posts: 2
This is the question (from Enthuware):

A stateless session bean S1 uses another stateless session bean S2 and requests a dependency injection using the following statement (contained in S1's code):
@EJB(name="ejb/S2", beanInterface=S2Local.class)

S2Local interface is as follows:

package com.enthu.ejbplus;
import javax.ejb.Local;
@Local
public interface SLocal {
String m1();
}

Given the above, complete the following S2Bean's code so that bean S1 will work as expected.

package com.enthu.ejbplus;
import javax.annotation.*;
import javax.ejb.*;

// insert lines here...

@Resource
SessionContext sctx;

public String m1(){ return "hello!"; }
}

And this are the answers:

1.
@Stateless
public class S2Bean implements S2Local {

2.
@Stateless(name="ejb/S2")
public class S2Bean implements S2Local {

3.
@Stateless
@Local(S2Local.class)
public class S2Bean {

4.
@Stateless(name="ejb/S2")
public class S2Bean {

5.
None of these.


Enthuware says that the correct answer is 2.

My dubt is for number 1, that is excluded with this reason:
This will not work because in the absence of 'name' in @Stateless, this bean will be associated with the name of S2Bean but S1 bean is looking for ejb/S2.

Binding the injected ejb by name, isn't done with beanName attribute??
The name attribut isn't used to bind an ejb reference to ENC entry name??


Thanks.

Germano
 
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