Hi Wes,
Thanks you for your help, in fact I started my search after reading this
article "DRY CRUD DAOs with JPA ...and Spring" by Gregg Bolinger:
http://www.greggbolinger.com/blog/2008/04/17/1208457000000.html
There he makes exactly what you say and I liked the idea very much. I'm
trying to mimic that but without Spring and without Hibernate, and also with
support for stored procedures.
Besides being intranet applications that requires much of set operations as
discussed with Pinaki Poddar, and hence JPA alone is perhaps not the most
appropiate approach, the other big drawback is that our team has years of
experience maintaining many legacy client server apps mostly written in VB6.
Starting developments in Java web applications has been slow for us and we
try to keep things simple. We choosed Wicket, IReport and a code generator that
builds a DAO based on another persistence library (that I'm trying to replace
now as it closed source recently and is not standards based). With that we
released.
Getting used to Spring and Hibernate will take some time, and I'm not even
sure it they fit our needs. I'm trying to adopt new tools (ok new for us!) at a
slow pace to ease our transition.
I'm interested to know whether you consider feasible the development of a
DAO layer solely based on JPA, that fits well with this kind of development
scenario: heavy usage of stored procedures, non-navigable but rather set based
operations.
Thanks again for your help,
Daniel
________________________________
De: Wes Wannemacher (via Nabble) <[email protected]>
Para: Daniel Toffetti <[email protected]>
Enviado: viernes 17 de abril de 2009, 9:46:57
Asunto: Re: Looking for advice on JPA based DAO
On Wednesday 15 April 2009 23:07:05 Daniel Toffetti wrote:
> Hi all,
>
> I'm looking for a JPA based DAO solution with minimal dependencies on
> other libraries. So far I've found lots of implementations based on JPA
> "and" Spring, Hibernate, both of them, TopLink, etc. I would like to know
> if there is any standard way of doing it, or reference implementation (even
> small, unfinished open source), or else if it's worth to attempt to do it.
> Having seen so many DAO libraries and wrappers, so many articles and blog
> posts everywhere, I must admit that I'm confused. Any advice is welcomed !!
>
> Regards,
>
> Daniel
Personally, I like Spring. It is mostly inobtrusive and easy to unit test. I
have a GenericDao I wrote and reuse. It is tied to Spring's JpaTemplate and
DaoSupport, but it's easy and works great. If you want it, ping me off-list,
and I'll send it over with an example spring config (with pooling
connections).
-Wes
--
Wes Wannemacher
Author - Struts 2 In Practice
Includes coverage of Struts 2.1, Spring, JPA, JQuery, Sitemesh and more
http://www.manning.com/wannemacher
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