• 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:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Liutauras Vilda
  • Paul Clapham
Sheriffs:
  • paul wheaton
  • Tim Cooke
  • Henry Wong
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Piet Souris
Bartenders:
  • Mike London

Help Ejb 3 In Action page 304

 
Ranch Hand
Posts: 189
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi Folks,
I`m a little bit confused at page 304 of the EJB3 in action with the code below


The purpose of the code is to undo the changes made on the item, so why don't we just say entityManager.refresh(item), insted of passig again the entityManager.merge(item) as an argument to the refresh method ??

It's the same thing with the second method when it comes to deleting an item ( why domn't we just say entityManager.remove(item) instead of entityManager.remove(entityManager.merge(item)) ??
 
Ranch Hand
Posts: 268
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
try this thread
 
reply
    Bookmark Topic Watch Topic
  • New Topic