select for update means i am locking those rows while selecting so no body
else can use that , after manipulating those i can release that .
my doubt is this
1. user1 select some row from database in one method
2. user1 change something on that
meantime user2 comes and repeat 1,2
now both are trying to update into database
does ejb help us in preventing this
>From: Carlos Otero Barros <[EMAIL PROTECTED]>
>Reply-To: A mailing list for Enterprise JavaBeans development
><[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Date: Tue, 30 Jan 2001 22:19:12 +0100
>
>Hi.
>Not sure what you mean by "SELECT FOR UPDATE".
>Two instances of the same Entity Bean over the same row still have
>different
>transaction contexts.
>You may expect isolation from transactions so you can rely on them.
>If two users try to update the row almost at the same time from different
>instances of the same class of Entity Bean then the standard transaction
>approach applies.
>
>Regards.
>
>----- Original Message -----
>From: "manishi tuli" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Tuesday, January 30, 2001 7:53 PM
>
>
> > if 2 instances of ejb are trying to update same row , can we handle this
> > thing with ejb transaction or we have to do with select for update
> >
> > thanks
> >
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