http://blog.xebia.com/2009/07/13/jpa-implementation-patterns-wrap-up/
[http://blog.xebia.com/2009/07/11/jpa-implementation-patterns-testing/]
차근 차근 봐둬야 할 글목록이 있군요.
Basic patterns
* Data Access Objects
[http://blog.xebia.com/2009/03/09/jpa-implementation-patterns-data-access-objects/]
* Saving (detached) entities
[http://blog.xebia.com/2009/03/23/jpa-implementation-patterns-saving-detached-entities/]
* Retrieving entities
[http://blog.