Undo-Redo and the Command Pattern

[Jameson]

Hi,

I'm interested in any insights you might have about how to implement
undo/redo in a multi-user environment (if it's wise to do it at all). My
software is already using the Command and Observer patterns for implementing
user actions and as such they are pretty simple to undo/redo in a single
user situation. In a multi-user scenario, I can imagine many problems with
this however (particularly with respect to database inserts, deletes and
updates).

Any thoughts?


Thanks

 

[Michael Nemtsev [MVP]]

Hello Jameson,

try to google.
I've met several model about multiuser undo/redo

---
WBR,
Michael Nemtsev [.NET/C# MVP] :: blog: http://spaces.live.com/laflour

"The greatest danger for most of us is not that our aim is too high and we
miss it, but that it is too low and we reach it" (c) Michelangelo


J> Hi,
J>
J> I'm interested in any insights you might have about how to implement
J> undo/redo in a multi-user environment (if it's wise to do it at all).
J> My software is already using the Command and Observer patterns for
J> implementing user actions and as such they are pretty simple to
J> undo/redo in a single user situation. In a multi-user scenario, I
J> can imagine many problems with this however (particularly with
J> respect to database inserts, deletes and updates).
J>
J> Any thoughts?
J>
J> Thanks
J>