Re: Calling a Windows DLL
From: Lew Pitcher (Lew.Pitcher_at_td.com)
Date: 05/31/04
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Date: Mon, 31 May 2004 08:51:22 -0400
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Alan wrote:
> We have a windows application written in VB w/SQL Server (SQL2K) in
> the backend. Another application would like to have access to some of
> our data (read/only). Normally we would provide the data via our
> external interface DLL, but this is a Java application is running on
> Unix. We really don't want the java app hitting the database directly
> (even R/O) because when things change their app would then be broke
> and we get yelled at.....
>
> In the Windows world we simply make sure our external interface DLL
> doesn't change input or output interfaces and we make all necessary
> chages to the DLL behind the scene. Any suggestions on how best to
> approach this? We would like to maintian the interface layer since our
> developers are most familar with the application and database.
OK, write a Java class that encapsulates and isolates your database I/O, just
like you would have written a Windows DLL to do. Give that Java class to your
Unix developers to use instead of their direct access (presumably through JDBC),
and /you/ maintain the Java class when ever you change your database.
- --
Lew Pitcher
IT Consultant, Enterprise Application Architecture,
Enterprise Technology Solutions, TD Bank Financial Group
(Opinions expressed are my own, not my employers')
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