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Product: VirtDS - "FrameWork for C/S app"
Vendor/Author: Ivan Bies
Web Site: http://perso.infonie.fr/bies/virtds.zip
Email Address: bies@infonie.fr

Vendor's Description (from Readme files, web site, etc.):

This framework contains 2 components which are designed to help you developing client-server applications which data are not provided by a SQL middleware, but, for instance, by a TP monitor, RPC calls, TCP/IP sockets, HTTP.... they can also be used for applications based on files or for briefcase applications.

The first components, TVirtualDataset is provided to create custom Datasets.

The second component, TEventDataset (inherits form TVirtualDataset), is provided to be used directly in your application. It exposes 3 events. With these events, you can specify how the physical data are loaded and updated.

The components can be used with DELPHI 3.x (tested with professional and client-server versions). There is no run-time DLL.

Price for one developer licence with full source code     : 80 $US

Price for a site licence with full source code          : 240 $US

BDE Alternatives Guide Comments:

This looks like a great starting point for developing a TDataSet descendant.

The vendor has used the components in an application at a French bank with about 7000 users!  The data comes from CICS transactions on a IBM server (MQ SERIES is the middleware).  This kind of connectivity, seamlessly intergated in to Delphi, is a testament to Delphi's OO architecture.

 

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