Thanks for the comments. I will read up some more and decide whether it may work for a huge meet-in-the-middle project.
-=Ivelin=- ----- Original Message ----- From: "Ugo Cei" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, February 16, 2003 3:32 AM Subject: Re: extending XMLForms for different kinds of models...opinions? > ivelin wrote: > > Ugo, can you can share experience with Hibernate vs. Jakarta OJB, Cayenne > > or another Open Source O/R tool. > > > > There is a reasonably objective comparison here > > http://c2.com/cgi-bin/wiki?ObjectRelationalToolComparison > > but I would like to hear more from a usability, flexibility and performance > > perspective. > > I cannot really do a comparison here. Hibernate is the first O/R mapping > tool I've used (after a few home-made attempts) and I haven't tried > either OJB or Cayenne or anything else. > > Apart from what I've already said, I like Hibernate also because: > > 1. It follows the principles outlined in Scott Ambler's papers ([1] and > [2]), which I heppen to mostly agree with. > 2. It has a lively community behind itself and is being very actively > developed. > > I think usability is great and is immensely helped by good docs. I > cannot comment much on flexibility, I have just one application > developed with Hibernate and it was designed in a top-down fashion (i.e. > design your ojbects first, than derive the DB structure from them), > which is IMHO the best, if you can afford to get DBAs to do what you ask > ;-). But Hibernate purports to support all styles of design (top-down, > bottom-up, middle-out, meet-in-the-middle, see [3]), so flexibility > should be guaranteed. > > With respect to performance, I haven't any data and in my application we > haven't done any benchmarking or optimization yet. I have the feeling > that it is executing a little too many queries behind the scenes, but > that by tweaking Hibernate's settings (eager vs. lazy loading, caching) > we could get very good performance without mucking with the code. > > Biggest problem so far (mostly with some of my co-workers, who have a > good SQL background) is that sometimes you get a feeling of loss of > control. Not being able to control what SQL statements you application > is executing can be intimitading to some. Not to me, I always loathed > SQL ;-), but sometimes, when the thing does not work as you expect it to > (and most of the times this is due to your misreading of the docs), you > wonder whether the Law of Leaky Abstractions [4] is going to apply. > > Ugo > > -- > Ugo Cei - http://www.beblogging.com/blog/ > > [1]: http://www.ambysoft.com/mappingObjects.html > [2]: http://www.agiledata.org/essays/mappingObjects.html > [3]: http://www.rollerweblogger.org/page/roller/20021013 > [4]: http://www.joelonsoftware.com/articles/LeakyAbstractions.html > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, email: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
