Point of Sale

[Evan Simpson]

Andreas Pauley wrote:
> If the network is down each POS station should still be able to function 
> without interruption.
> 
> At the moment the current POS system uses an inhouse developed message 
> queing system to communicate with the ERP/Retail backend. A POS station 
> submits each transaction (and other relevant messages) to a local queue, 
> from where it is sent to the back-end system. If the network is down the 
> messages just stay queued until the network is back up again.
> The central backend system uses the same queing technique to submit 
> price updates etc. to each POS station.

You may want to check out the Spread Toolkit, at www.spread.org, whose 
Python wrapper lives at http://www.python.org/other/spread/doc.html. 
It's used by the Zope Replication Service, for example.

Cheers,

Evan @ 4-am