On Nov 10, 2003, at 9:49 AM, Mark A. Schwenk wrote:

> I've started using Tantalus in a couple of applications and am looking
> for more examples of doing inserts and updates with it. Are there any
> active users of it?

Not that I know of. Though I'm theoretically the maintainer, I've not 
touched it in about a year, and I don't expect to do any further 
development of it.

Tantalus grew out of a specific need I had while migrating a project 
from PHP to Smalltalk. The database schema was already well established 
and contained large amounts of valuable data. And finally it was using 
MyISAM tables in MySQL, so ACID transactions were not available.

Those requirements led to some interesting design choices in Tantalus, 
which worked out surprisingly well. Still, wrestling with that problem 
has convinced me that OO databases are the way to go. The mismatch 
between graphs of objects and relations between rows is deep enough 
that you I can't find a general mapping mechanism that doesn't put 
significant restraints on the object model, the database schema or 
both.

> I've tried accessing some of the links from the SqueakMap entry but 
> find they are broken.

The other side to this story is that I no longer work at Whistler.com, 
and it seems that they aren't maintaining any of the Smalltalk work 
that I did. That's part of the reason I'm not working on Tantalus 
anymore - I don't need it now.

I can probably dig up the documentation and make it available on my new 
website, if anyone cares enough; and in any case, I can certainly 
answer questions and support anyone still using Tantalus.

My own recommendation would be to look into OODBs - GOODS, Magma or 
Omnibase. I like GOODS in particular, and have been trying to find some 
free time to try out Avi's new client for it. If you must or prefer to 
use a relational database, check out Avi's Roe package. It's basically 
the successor to Tantalus - it goes off in another direction based on 
problems we had writing and using Tantalus.

At this point, I'm content to call Tantalus an interesting experiment 
and leave it at that. But again, I'll gladly provide support to anyone 
that finds it useful.

Colin