Java persistence frameworks...

[Saem]

I'm curious as to what persistence (and ORM) frameworks people have used in the Java world and what are their favourites and why?

 

[DemoCoder]

Hibernate, plain and simple.

Recognize that persistence architectures have been abstracted now through the JPA (Java Persistence API), so you can model code to fit JPA, and then plugin a backend provider.

 

[BRiT]

In 1998-99 timeframe, before Hibernate and before Oracle bought em, I used TopLink. It was a bit rough around the edges and quirky. The support was nice, usually creating code-drops with fixes within a week of bug reporting. I don't know what Oracle did with the technology.

Java's earlier attempt at persistence, JDO is aborted or still-born. Nothing worth it came from it. However, the Java Persistence layer is supposedly nice. You can swap out back-end providers. I'm not sure if Hibernate provides for it or not.

Hibernate. I've used it over the course of the past 4 years. It's really slick and has a large community support base. It's grown quite a bit, it very powerful, and remains simple to use.

On the .NET side, NHibernate.

 

[Saem]

Yeah, Hibernate seems to be the "big" one. I was wondering if people had tried something more "exotic".

I'm wanting to experiment with wicket + some persistence/orm + scala (scala-lang.org). Personally, I think scala is the most interesting language to come out in a really long time.

 

[BRiT]

Unfortunately, the compressed time-tables at work prevent most of us from being able to examine and evaluate most of the unknown or anything that's not the defacto leader.