Sun Assessment Exam Question 3

[Amandeep Singh]

# 28. Given an interface:
#
# 4. @Local
# 5. public interface MyI {
# 6. public Set go(Set s);
# 7. }
# Given an excerpt from a stateful session bean that implements this business interface:
#
# 9. @Stateful
# 10. @TransactionAttribute(TransactionAttributeType.REQUIRED)
# 11. public class MyStatefulBean implements MyI {
# 12. @Resource SessionContext ctx;
# 13. public Set go(Set s) {
# 14. ctx.getRollbackOnly();
# 15. ctx.getEJBOjbect();
# 16. ctx.getEJBHome();
# 17. throw new Exception("Will I, won't I?");
# 18. }
# 50. }
# No deployment descriptor is used. Which statement is correct?
# An exception is thrown on line 14.
# An exception is thrown on line 15.
# An exception is thrown on line 16.
# An exception is thrown on line 17.


answer 2 is correct. Why not 4?

[Rahul Babbar]

because getEJBObject(), getEJBHome() and a few other methods are obsolete, and should only be used for EJB 2 ...
So, exception is thrown at line 15..

[Amandeep Singh]

oh really this is the reason !

[Javier Ramos]

The reason for this is because the interface is @local and you are trying to get the remote one.

public EJBHome getEJBHome()
Obtain the enterprise bean's remote home interface.
Returns:
The enterprise bean's remote home interface.
Throws:
IllegalStateException - if the enterprise bean does not have a remote home interface.


public EJBLocalHome getEJBLocalHome()
Obtain the enterprise bean's local home interface.
Returns:
The enterprise bean's local home interface.
Throws:
IllegalStateException - if the enterprise bean does not have a local home interface.

[Amandeep Singh]

thanks i got it..