Question : How to write application server?

Hello,

I'm using CodeGear 2009 for my projects. I need to know about how to write an application server (business logic) that is located between client and DB server. This application server should be aware of queuing of that is sent to it and using threads.
Which is the best book or other source I may use it to learn three-tier application development in details.

Beforehand thank you very much for your help :)

Answer : How to write application server?

Here are some other libraries to help you with your application server, though I haven't personally used them (but they are each as popular as the ones I listed before, and have a pretty decent user base):

kbmMW http://www.components4programmers.com
RTC SDK http://www.realthinclient.com

You may even want to use Delphi's own DataSnap? http://www.embarcadero.com/rad-in-action/datasnap
Get Dr Bob's white paper http://www.embarcadero-info.com/in_action/radstudio/db.html and watch the videos as well.