Re: Castor JDO

["David Wible" <davdouglas69@hotmail.com>]

would any of these products compete with TopLink?

Thanks,

David





>From: Brian McCallister <brian_yahoo@frums.net>
>To: <ajug-members@www.ajug.org>
>Subject: Re: Castor JDO
>Date: Wed, 3 Sep 2003 19:46:58 -0400
>
>On Monday, September 1, 2003, at 11:50 AM, Michael Fortin wrote:
>
>>Hibernate has a great reputation, really good docs, and a simple api.  We 
>>just started using for one of our projects.  You should know that neither 
>>Castor (last I looked) or Hibernate fallow the JDO spec.  There is also 
>>OJB from apache (http://db.apache.org/ojb/), it's development seemed a bit 
>>stalled when we first looked at it some months ago but their site has been 
>>updated since then.
>>
>>Michael
>>
>
>FYI: OJB is very much active. It has been in feature freeze for a bit 
>pending the 1.0 release (rc4 is out right now). Two new committers were in 
>fact just added this week (full disclosure, I am one of them).
>
>Hibernate is a very good product as well. I would *highly* recommend 
>looking closely at OJB and Hibernate before using Castor. Both of them 
>provide roughly an order of magnitude performance improvement on Castor in 
>addition to being more flexible products.
>
>In addition to the major architectural differences between OJB and 
>Hibernate, from a user's perspective the biggest difference is the API's 
>used to access the backing store.
>
>Hibernate uses its own HQL query language, an SQL-like language derived 
>from ODMG (and significantly more pleasant to use according to the majority 
>of people who use it).
>
>OJB uses ODMG and provides a lower level (though very easier to use) 
>object-level (as compared to query-language level) API via the 
>PersistenceBroker (http://fischer.skife.org/ojb/pb-tutorial.html is part of 
>the new set of tutorials I am working on that are no on the main site yet) 
>. A JDO API is available via a plugin to the JDO reference implementation 
>but it is not very well documented yet (I have it on my todo list). A full 
>JDO implementation is slated as the top priority after 1.0, and in fact the 
>major pieces needed for it are already in CVS (org.apache.ojb.otm.*)
>
>-Brian McCallister
>

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