• 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
  • Ron McLeod
  • Junilu Lacar
  • Liutauras Vilda
Sheriffs:
  • Paul Clapham
  • Jeanne Boyarsky
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Piet Souris
  • Carey Brown
Bartenders:
  • Jesse Duncan
  • Frits Walraven
  • Mikalai Zaikin

Data Access Object

 
Ranch Hand
Posts: 176
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
One of the SCEA obj :
Identify costs and benefits of using intermediate data-access object between entity bean and data resource.
Differences / Advantages / benefits :
1. JDBC DataSources can automatically pool and reused database connections for multiple clients.
2. DataSource objects can be stored in JNDI tree. If the Database type or location changes, we need to change only the single DataSource object stored in the JNDI tree.
But what are the disadvantages / costs associated with DAOs ? Can anyone elaborate on this. Thanks.
 
Ranch Hand
Posts: 350
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
hi
You can probally search for that stuff in the BluePrints, well I my self have to do that rit now.
Do you have any Idea on some good UML tool , other than Together Soft ( this question is does not belong to this topic but anyways....)
Vivek
 
Madhu Juneja
Ranch Hand
Posts: 176
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Refer : http://www.certificationguru.com/javaarchitectresources.html
for more links on cert and on UML
 
pie. 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