On Sat, Jul 13, 2002 at 07:35:32PM +0200, Koen Pellegrims wrote:
> Maybe off-topic, but are you sure you are taking the right approach with
> this?
> If the communication is wireless, how will you add transaction support?
> You have to make sure that each invoice is sent and that it is sent only
> once!
>
> I have a lot of expierence in this area and I can tell you that plain
> web-technologies are not very well suited for this kind of communications (I
> learned this the hard way :-p ).
> Maybe you should look at a more suitable approaches such as Sybase's
> iAnywhere suite, which is very good; or (if you happen to have an SAP
> backend) the SAP mobile engine. Both of these technologies allow you to run
> an offline application on a mobile device and then synchronize (be it
> wireless or not) with a backend. Both of them can be implemented with full
> transaction support...
It is not plain web-technology project. The client is written in eVC 3.0. I'm
using cocoon as an application server. And for maintaining database coherence
I'm sending whole transaction data as one part (client prepares the invoice
and sends it in one piece). And the client will handle the proper
order/invoice placing so the user won't be able to resend it (just like in a
web browser)
ouzo
PS. SAP engine is far too expensive, got no idea about Sybase solution
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