Again, we'd be more than happy to help if you could be more verbose.
Essentially, what we need to know now is:

1. What format all the data is stored in(e.g. CSV, flat files, etc)
2. What module you(or your organisation) has selected as the best module for this case

The act of starting functions upon connection is an entirely different matter, sometimes handled by your window manager. You will have to read the corresponding documentation to specify what programs get run upon connection. Or you could write a daemon that automatically handles those requests, but that, too, is an entirely different matter.