JDO & JPA

[Naveen K Sinha]

Ranchers,

I am confused between these two things.. JDO and JPA. Why two different framework for the same thing ? What level of understanding I need to have on JDO for the exam.

I already have read JPA. Do, I need to study JDO as well ? Or should I just remember the few differences like JPA is only for RDBMS, JDO supports many different databases; JDO more mature than JPA. ( I know only these two :-( )

Appreciate your help.

Thanks,
Naveen

[prathap venkata naga yelugula]

Hi .
Can you suggest me one good book for JPA.
Thanks,
Pratap.

[Riyaz Enayath]

Hi Pratap,

Below are JPA resources:

(i) EJB 3.0 JPA Specification (JSR 220)

(ii) Part 5 on Java EE 5 Tutorial from Official website (http://java.sun.com/javaee/5/docs/tutorial/doc/bnbpy.html)

(iii) Part 7 on ejb-3 in action (Implementing domain models)


Regards,
MR

[Hong Anderson]

JDO has more flexibility than JPA. JDO supports any type of datastore whereas JPA is so narrowed and limited to RDBMS only.
JDO 2 also has more features than JPA1.

http://db.apache.org/jdo/why_jdo.html
http://db.apache.org/jdo/jdo_v_jpa.html