Re: [JBoss-user] Re: Hibernate or ejb

kiuma Fri, 14 Mar 2003 01:35:30 -0800

Andreas Mecky wrote:

Hi everyone,

it seems that I made a mistake by saying something nasty about hibernate :)
The first thing we came across is the problem of lazy instantiation. Let's
say you have
object A that has a relation to obect B. But you only want to load A and B
later when
it is used. Hibernate cannot handle this (this is an open bug but maybe
fixed in the new
2.0 beta). We have found a way around this but it is not very nice.
Another thing is definitely the caching in hibernate. You never know when
hibernate
actually saves the data to your DB. This makes it very difficult in an
evironment
where you access your DB from different points.
The last thing that kept us busy was the fact the (assume the schema as
above)
when you save B then A does not get updated. This means you have to take
care of updating A manually when you change B. It took some time to figure
this
one out. Well, you can always restart your server and everything is fine :)
It seems to me that this update problem is a big thing since I know that
castor JDO is struggling at the same point.
But I must also say that the reverse engineering is nice and saved us some
time.
So, I have to go back to my project and get some more experience with
hibernate.
When I stumble the next time I will let you know.........

Andreas
----- Original Message -----
From: "kiuma" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, March 14, 2003 8:27 AM
Subject: Re: [JBoss-user] Re: Hibernate or ejb
Kevin O'Neill wrote:

On Thu, 13 Mar 2003 18:52:39 +0100, Andreas Mecky wrote:

we are currently using hibernate in a web project. Very nice. We did

some
additional code generation
and it is very handy.
BUT: stay with your EJB-CMP. It will prevent a lot of headache. There
are
certain "little things"
with hibernate that makes life as a developer painfull.
Can you elaborate?

<snip/>
Ok, sorry, as anyone who doesn't read messages related to topics in a
clever way I made a 'stupid' question. For those who are interested in
diffs read at this http://sourceforge.net/forum/message.php?msg_id=1867312
Anyway Kevin, please explain to us what
<<certain "little things"
with hibernate that makes life as a developer painfull>>
are

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thx 4 explanation !

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Re: [JBoss-user] Re: Hibernate or ejb

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