Win a copy of OCP Oracle Certified Professional Java SE 11 Developer Practice Tests this week in the OCP forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Paul Clapham
  • Jeanne Boyarsky
  • Ron McLeod
  • Tim Cooke
Sheriffs:
  • Devaka Cooray
  • paul wheaton
  • Mark Herschberg
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Frits Walraven
  • Jj Roberts
Bartenders:
  • Carey Brown
  • salvin francis
  • Piet Souris

Question about exception

 
Ranch Hand
Posts: 37
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Here is a question about EJB exception:
Which one of the following statements regarding the client view of exceptions received from an enterprise bean invocation is correct?
1. The client can safely continue the transaction by retrying the operation if an application exception is received.
2. The client can safely continue the transaction by retrying the operation if an application exception is received, but only after checking the transaction has not been marked for rollback.
3. The client can safely continue the transaction by retrying the operation if a non-application exception is received.
4. A local client cannot continue a transaction if javax.transaction.TransactionRolledbackLocalException is received.
5. A remote client cannot continue a transaction if javax.transaction.TransactionRolledbackException is received.
The provided answer is 5 only, but I think 2 and 4 are also correct, any idea about this?
Thanks.
 
Greenhorn
Posts: 15
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I agree with you.
Sunil
 
Ranch Hand
Posts: 33
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
- Question 2 is confusing; what does the "safely" really mean in this case? I would bet that 2 is correct anyway (if the client is EJB, use getRollbackOnly() and if not, use UserTransaction.getStatus()).
- Question 4 is correct in my opinion. How is it supposed to differ from question 5?

Originally posted by Li Xin:
Here is a question about EJB exception:
Which one of the following statements regarding the client view of exceptions received from an enterprise bean invocation is correct?
1. The client can safely continue the transaction by retrying the operation if an application exception is received.
2. The client can safely continue the transaction by retrying the operation if an application exception is received, but only after checking the transaction has not been marked for rollback.
3. The client can safely continue the transaction by retrying the operation if a non-application exception is received.
4. A local client cannot continue a transaction if javax.transaction.TransactionRolledbackLocalException is received.
5. A remote client cannot continue a transaction if javax.transaction.TransactionRolledbackException is received.
The provided answer is 5 only, but I think 2 and 4 are also correct, any idea about this?
Thanks.

 
Ranch Hand
Posts: 94
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
4 in incorrect because local client receivs javax.ejb.TransactinRolledBackExcepiton not the one in javax.transaction pacage.
1) is wrong becuase you don't know if the transaction is rolled back
2) is wrong becuase if don't have a way to know if it is rolled back if it is containers started the transaction and the bean make decision in this code.
 
Morning came much too soon and it brought along a friend named Margarita Hangover, and a tiny ad.
the value of filler advertising in 2021
https://coderanch.com/t/730886/filler-advertising
reply
    Bookmark Topic Watch Topic
  • New Topic