Yep that's right. Mine is in there and is called "HIGH/LOW Singleton+Session
Bean Universal Object ID Generator". It has been designed following the
pattern discussion at the same place called "Entity Bean Primary Key
Generator".
Yes Sean, some solutions do not require database access or singleton, but
they have their drawbacks. (read article on web pages I mentioned in my
initial mail).
And yes Andy, one can use database specific features, but this pattern tries
to be plateform independant.
The goal of this implementation is to create "An Enterprise-ready, Simple,
Performant, Scalable, Plateform-independant EJB Primary Key Generator".
Fun is the word!
Emmanuel
----- Original Message -----
From: "Sean Neville" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, April 10, 2001 7:00 PM
Subject: RE: [JBoss-dev] Object Unique Id Generator
> 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]
> > > > |> _________________
> > > > |
> > >
> > >
> >
> >
> >
> > _______________________________________________
> > Jboss-development mailing list
> > [EMAIL PROTECTED]
> > http://lists.sourceforge.net/lists/listinfo/jboss-development
> >
>
> _______________________________________________
> Jboss-development mailing list
> [EMAIL PROTECTED]
> http://lists.sourceforge.net/lists/listinfo/jboss-development
>
> _______________________________________________
> Jboss-development mailing list
> [EMAIL PROTECTED]
> http://lists.sourceforge.net/lists/listinfo/jboss-development
>
_______________________________________________
Jboss-development mailing list
[EMAIL PROTECTED]
http://lists.sourceforge.net/lists/listinfo/jboss-development
