Let's start this project !!!!

Please I need you to help me, I am new, and I need to learn from your experiences.
Problem:
The Client :(Applet or jsp files).
The user enter the Username + Password
The Server who is listening to clients, get the Username and Password and check the database.
If the User exists, the Server will create a ServerChild that uses an object called LogReader to read contunually data from a log file and send them to the Client that displays them in a GUI.
Note: data is comming from a log file of an application server.
How would you think to start or design this project, what are the objects ?
Thanks