No, EJBs can't automatically accomplish what you are trying to do. And I
don't know of any databases that will do it either out of the box. I'm
having trouble even thinking of a generalized solution. User A can update
column 1 in row 1 in table 1, then user B can update column 2 in row 1 in
table 1 today. And you want to be able to undo user A's change while
leaving user B's change in place? The only think I can dream up is to
record every single change in some sort of change log table, recording who,
when, what. Then search this change log if you need to undo. This is a
difficult problem to solve and will have very high overhead.
----- Original Message -----
From: "Paula Turnbull" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, June 07, 2001 10:28 PM
Subject: RE: [JBoss-user] Version control
> Thanks for your replies. Sorry if my question seemed a bit vague.. Thats
the
> problem with being new, you never quite know what or how to ask sometimes.
> To try to clarfiy, my data will be stored in a database..as yet I don't
know
> which one. I guess I was trying to figure out if given multiple clients
> manipulating data via EJBs, is there anyway to have one of these clients
> with administrator 'rights' who can rollback changes made by any of the
> others, at anytime. Those changes could have happened two days ago
> potentially. I was thinking along the lines of sourcesafe's
implementation.
>
> I'll investigate the ideas posted. Thanks.
> >Paula
>
> -----Original Message-----
> From: Juha Lindfors [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, 7 June 2001 10:25 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [JBoss-user] Version control
>
>
>
> Hi,
>
> You would need to create your own implementation of the persistence
manager
> to support versioning persistence (via CVS or by other means). We don't
> provide you with that kind of PM yet. Could be an interesting project
> though.
>
> -- Juha
>
>
> At 14:54 7.6.2001 +1000, you wrote:
> >
> >Hi all, I am new to JBoss and to J2EE. I am wondering if it is possible
to
> >implement some sort of version control on application data on the server?
> >The application will have multiple clients and I need to maintian version
> >control so the site administrator can rollback to previous versions of
data
> >that has been modified by one or more of these clients. Is it possible to
> >integrate a third party system such as CVS? Or would I have to implement
> >this myself?
> >
> >Thanks,
> >Paula
> >
> >***********************************************************
> >Paula Turnbull
> >Java Programmer
> >Centre for Pest Information Technology and Transfer (C-PITT)
> >Hartley Teakle Building
> >The University of Queensland
> >Brisbane QLD 4072 Australia
> >
> >Email: [EMAIL PROTECTED]
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> >
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> >
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