Austin Ziegler
9/18/2003 9:44:00 PM
On Fri, 19 Sep 2003 02:55:12 +0900, ahoward wrote:
> would i be the first to consider this? has it been done? any ideas on
> the fastest way - one could up with alot of marshaling...
I don't really know Madeleine, but I don't think that there'd be much
conflict between the two frameworks. Transaction::Simple takes a snapshot of
the object at a point in time and keeps it in memory. It doesn't concern
itself with repeatability of a transaction (as Madeleine does), but it uses
that snapshot to rebuild the object if rewound. It does not reuse the same
object identifiers (unless the object responds to #replace), so anything
that depends on #__id__ will break on a rewind or abort.
Transaction::Simple is used in PDF::Writer to make "test changes" to a PDF
document; if something protected would cross a page boundary, we undo it,
create the page boundary, and then restart the object. So it's really meant
for "test changes", not for persistence.
Maybe Madeleine can use Transaction::Simple to gain the ability to rewind
transactions.
-austin
--
austin ziegler * austin@halostatue.ca * Toronto, ON, Canada
software designer * pragmatic programmer * 2003.09.18
* 17.30.56