> By reading this thread and an article posted by Linda DeMichiel and Craig > Russell (http://java.sun.com/j2ee/letter/persistence.html), I was quite > confused about which one (JDO or JPA) to choose as many efforts have been > pushed towards JSR-220 so far. I know JPA is mainly driven by vendors, > however I've heard its query language is quite powerful when compared to > JDOQL. Any comments would be appreciated.
Hi Dario, A correction. JPA is driven by large corporations and politics. There are actually many vendors of JDO (the majority with JDO1 solutions, but some with JDO2 solutions). I personally would not base any decision on what you hear. Large corporations say many things and put forward many statements about their preferred technology based on their own balance sheet and not on capability of the technology. You should base your decisions on what the specifications actually say and what implementations do and what you require. On JPOX we put together a brief comparison of JDO2 and JPA1 http://www.jpox.org/docs/persistence_technology.html This has been on our site for people to comment/disagree with. There are other such comparisons around, all coming up with the same basic opinion. Here are a couple http://www.jroller.com/page/matthewadams?entry=quick_comparison_of_ejb_3 http://jroller.com/page/ThoughtPark?entry=ejb3_persistence_an_inferior_standard Any particular feature of JPQL/JDOQL you are referring to ? -- Andy
