There are a series of key generation patterns available on The Server Side,
at least one of which requires no databases and no singletons, and is
therefore quite portable:
http://www2.theserverside.com/patterns/index.jsp
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of
Schaefer, Andreas
Sent: Tuesday, April 10, 2001 1:22 PM
To: '[EMAIL PROTECTED]'
Subject: RE: [JBoss-dev] Object Unique Id Generator
Hi Geeks
The "FOR UPDATE" is not always necessary as like in Oracle you
have a sequence generator delivering you an unique ID.
For the other DBs it is maybe better to use a DB procedure or
function to generate an unique ID than use a SQL Statement.
Have fun - Andy
> -----Original Message-----
> From: Emmanuel Sciara [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, April 10, 2001 9:28 AM
> To: [EMAIL PROTECTED]
> Subject: [JBoss-dev] Object Unique Id Generator
>
>
> Hi guys,
>
> I have written an advanced key generator for ejbs
> (http://ejbutils.sourceforge.net/). I would like to possibly have it
> blundled with JBoss. For this however, I need a database that
> supports "FOR
> UPDATE" sql clauses or transactions with serializable isolation level.
>
> >From what I know, Hypersonic does not provide that and I
> moved away from
> InstantDB early in the process because I had problems with
> it, so I don't
> know.
>
> So I guess, my question is two fold:
> - Does JBoss have such database?
> - If yes, do you think it would be worth blundling this stuff
> with JBoss.
>
> Note: the source is a bit out of date on sourceforge but I am
> working on it.
> I have a fully JBoss-deployable version if you are interested.
>
> Emmanuel
>
> > From: "marc fleury" <[EMAIL PROTECTED]>
> > > post this to jboss-dev, I remember there is a key
> generator somewhere
> but
> > > yours might be more advanced. if you generate some
> interest there, you
> > are
> > > on
> > >
> > > marc
> > >
> > >
> > > |-----Original Message-----
> > > |From: Emmanuel Sciara [mailto:[EMAIL PROTECTED]]
> > > |Sent: Friday, April 06, 2001 10:31 AM
> > > |To: marc fleury
> > > |Subject: Re: Thanks
> > > |
> > > |
> > > |Hey!
> > > |
> > > |Cool Idea! I am interested for sure. Just tell me where
> to find the
> right
> > > |sample code and I am of! (if you can do that easily
> enough, that would
> > save
> > > |me some time)
> > > |
> > > |Just need to modify my sql so it does not use "For
> Update", which is
> not
> > > |supported by Hypersonic. I would like to write some doc
> too. But I
> guess
> > > |that can wait if I send some explanation mail to the list.
> > > |
> > > |Any other suggestion you would have?
> > > |
> > > |Emmanuel
> > > |
> > > |----- Original Message -----
> > > |From: "marc fleury" <[EMAIL PROTECTED]>
> > > |To: "Emmanuel Sciara" <[EMAIL PROTECTED]>
> > > |Sent: Thursday, April 05, 2001 6:28 PM
> > > |Subject: Thanks
> > > |
> > > |
> > > |> for removing the documentation from the website,
> > > |>
> > > |> also did you think about implementing the high/low pattern and
> > > |putting it
> > > |> as an MBean (or Bean) in JBoss?
> > > |>
> > > |> let me know if interested let the list know and see if
> they want it.
> > > |>
> > > |> marc
> > > |>
> > > |>
> > > |> _________________
> > > |> Marc Fleury, Ph.D
> > > |> [EMAIL PROTECTED]
> > > |> _________________
> > > |
> >
> >
>
>
>
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