September 2009
![](http://blogmarks.net/screenshots/2009/09/02/afadda775d9356860cf9c181663b24ee.jpg)
JPA implementation patterns: Service Facades and Data Transfers Objects
In my previous blog on JPA implementation patterns, I touched upon the subject of the DTO and Service Facade patterns. In this blog I will explore why we would even need such patterns and put these patterns and the DAO pattern into the broader context of JPA application architecture.
April 2009
![](http://blogmarks.net/screenshots/2009/04/22/1c2867b6df3944f7578637b9a2bdf343.jpg)
Singletons and lazy loading
Solution au problème de lazy loading d'une classe Singleton.
Initialization on demand holder idiom : http://en.wikipedia.org/wiki/Initialization_on_demand_holder_idiom
January 2008
![](http://blogmarks.net/screenshots/2008/01/10/33a53e20f45b72579470fca22b73abc5.png)
J2EE[tm] Design Patterns > Design Patterns Catalog
by 2 othersEach pattern in this catalog includes sample code from JavaTM BluePrints reference applications such as the Java Pet Store sample application.
1
(3 marks)