LinuxSA Mailing list archives

  From: O'Connor, Steven <Steven.O'Connor@boralenergy.com.au>
  To  : 'erp@lwn.net' <erp@lwn.net>
  Date: Wed, 17 Mar 1999 10:33:57 +1030

Corba question

I am currently doing something that I am comfortable with in straight
C/sockets/MM, and I am not sure how to acheive the same trick in Corba,
could someone please advise ....

Situation:

Lets say that you have an off-the-shelf system, like an accounting system,
that works as follows :

Core Accounting System        <------- messages back and forth
--------------->  GUI client

Now, you want to override the behaviour of the core accounting system on
receipt of certain messages from the GUI, lets say for example a 'Calculate
Invoice' message comes in, which you want to change so that it works out the
additional Canadian GST to be applied, a feature which the off-the-shelf
accounting module does not support.

Without hacking the existing system, you write an 'interceptor' application
that grabs all of the incoming GUI messages, write code to handle the
particular messages that you want to change, and then tell the messaging
library to 'pass everything else on to the original core accounting system'.
- easy.

Is there a way in Corba that you can override methods in an off-the-shelf
package without hacking it ?

Thanks
SteveOC
        

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