Exam 1z0-895 topic 1 question 69 discussion

Actual exam question from Oracle's 1z0-895

Question #: 69
Topic #: 1

A developer writes a stateless session bean FooBean and uses its deployment descriptor to declare a local ejb dependency on a stateful session bean in the same ejb-jar.

Which environment annotation, when declared within the FooBean bean class, is equivalent to the ejb-local-ref shown above?

A. @EJB(beanName="BarBean") Private acme.Bar barRef;
B. @EJB(name="bar", beanName="BarBean") Private acme.Bar barRef;
C. @EJB(name="barRef", beanName="BarBean") Private acme.Bar bar;
D. @EJB(name="ejab/barRef", beanName="BarBean")

Show Suggested Answer

Suggested Answer: contributeC 🗳️
name is barRef
Example:
ejb-local-ref
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Via annotation -
Usable by EJB, Interceptor, Servlet, Filter, or Listener
package org.superbiz.refs;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.naming.InitialContext;
@Stateless
@EJB(name = "myFooEjb", beanInterface = FooLocal.class)
public class MyEjbLocalRefBean implements MyBeanInterface {
@EJB
private BarLocal myBarEjb;
public void someBusinessMethod() throws Exception {
if (myBarEjb == null) throw new NullPointerException("myBarEjb not injected");
// Both can be looked up from JNDI as well
InitialContext context = new InitialContext();
FooLocal fooLocal = (FooLocal) context.lookup("java:comp/env/myFooEjb");
BarLocal barLocal = (BarLocal) context.lookup("java:comp/env/org.superbiz.refs.MyEjbLocalRefBean/myBarEjb");
}
}

Via xml -
The above @EJB annotation usage is 100% equivalent to the following xml.
<ejb-local-ref>
<ejb-ref-name>myFooEjb</ejb-ref-name>
<local>org.superbiz.refs.FooLocal</local>
</ejb-local-ref>
<ejb-local-ref>
<ejb-ref-name>org.superbiz.refs.MyEjbLocalRefBean/myBarEjb</ejb-ref-name>
<local>org.superbiz.refs.BarLocal</local>
<injection-target>
<injection-target-class>org.superbiz.refs.MyEjbLocalRefBean</injection-target-class>
<injection-target-name>myBarEjb</injection-target-name>
</injection-target>
</ejb-local-ref>

by xylofivo at April 4, 2025, 2:28 p.m.

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