This week's book giveaway is in the Android forum.
We're giving away four copies of Head First Android and have David & Dawn Griffiths on-line!
See this thread for details.
Win a copy of Head First Android this week in the Android 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 Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Tim Cooke
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Liutauras Vilda
Sheriffs:
  • Jeanne Boyarsky
  • Rob Spoor
  • Bear Bibeault
Saloon Keepers:
  • Jesse Silverman
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
Bartenders:
  • Piet Souris
  • Al Hobbs
  • salvin francis

BMT problem

 
Ranch Hand
Posts: 37
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Which two are true about bean-managed transaction demarcation?

A) A transaction used by a BMT bean MUST have been started by the bean.
B) The caller's transaction will be propogated into a BMT bean.
C) Transactions in a BMT bean do not propogate when the BMT bean calls
a method on another bean.
D) A bean cannot use both CMT and BMT together.
E) BMT beans must not specify transaction attributes

a,c,d and e seem to be true to me?Which are the 2 correct answers?
 
Sheriff
Posts: 3036
12
Mac IntelliJ IDE Python VI Editor Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I agree with you. Where does this question come from?
 
Ranch Hand
Posts: 1683
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Why do you think that a,c,d and e are true?
 
Greg Charles
Sheriff
Posts: 3036
12
Mac IntelliJ IDE Python VI Editor Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I don't know why Jayashree thinks they're true, but for me:

A. Transactions don't propagate into BMT beans, so if it's using a transaction, then it must have started it.

C. Oops, not true. Transactions can propagate from BMT beans, just not to them.

D. Beans must be marked either BMT or CMT.

E. Not sure about this one actually. The transaction attributes (REQUIRED, MANDATORY, SUPPORTED, etc.) only really make sense for CMT. I suppose you could mark them for BMT though. I never really thought about it.

So if I had to choose only two, I'd go for A and D.
 
Roger Chung-Wee
Ranch Hand
Posts: 1683
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

E. Not sure about this one actually. The transaction attributes (REQUIRED, MANDATORY, SUPPORTED, etc.) only really make sense for CMT. I suppose you could mark them for BMT though. I never really thought about it.


According to the EJB spec:


There is no mechanism for an Application Assembler to affect enterprise beans with bean-managed transaction demarcation. The Application Assembler must not define transaction attributes for an enterprise bean with bean-managed transaction demarcation.

 
Greg Charles
Sheriff
Posts: 3036
12
Mac IntelliJ IDE Python VI Editor Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
All right, so we're down to A and D. Which one should we throw out, or is the question wrong?
 
Ranch Hand
Posts: 121
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Arent A, D ,E true in the above ?
a) true - since BMT beans do not participate in the propogated transaction
d) true
e) true - as per spec.
 
Ranch Hand
Posts: 372
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
yes. A, D and E are right
 
You showed up just in time for the waffles! And this tiny ad:
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
https://coderanch.com/wiki/718759/books/Building-World-Backyard-Paul-Wheaton
reply
    Bookmark Topic Watch Topic
  • New Topic