• 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 ...
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Bear Bibeault
  • Liutauras Vilda
  • Jeanne Boyarsky
  • Junilu Lacar
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Jj Roberts
  • Tim Holloway
  • Piet Souris
  • Himai Minh
  • Carey Brown
  • salvin francis

Stateful Session Bean question

Ranch Hand
Posts: 44
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

my question:

At pag 80 of EJB 2.0 spec the table specifies that for ejbCreate is

possible to make an access to a Resource manager but ejbCreate is

associated with a unspecified transaction context and this seems in

contrast with the affermation that accessing resorce managers and

enterprise beans is disallowed in the session bean methods for wich the

Container dos not have a meaningful tx context like declared in the specs.


Thanks in advance !

Posts: 4
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
It struck me too in the beginning and i reasoned as below. If someone knows better, then pls let us know

For BMT, the bean can use UserTransaction to start a transaction. So, it can call on resource manager's methods and other enterprise beans.

For CMT, probably the bean can call other enterprise beans which (probably) do not need a transaction and can manage their own transaction. I am not sure what the bean can do with Resource Managers.

Same for a Stateless session bean, it can call getUserTransaction in it's ejbCreate but cannot use any of its methods. So, it can just hold on to it. Its something like "being allowed a cake but it's just too soon to eat it".
Time is the best teacher, but unfortunately, it kills all of its students - Robin Williams. tiny ad:
Thread Boost feature
    Bookmark Topic Watch Topic
  • New Topic