Exercise for Lecture 12: Remote Proxy

Download the Exercise, unzip, and study the class diagrams.  They show the architecture of an ATM assembly that connects to a bank's remote database and its accounts via RPCs.  The ATM already uses a remote-proxy object for the database object.

Rebuild and run the VS Solution.

It's slow, because the database-remote-proxy uses RPCs for every request --- login, logout, balance check, and withdrawal.

Improve the ATM by altering the database-remote-proxy (class RProxy) so that, on login, it constructs a remote-proxy object for Account, so that balance checks and withdrawals are processed locally in the ATM assembly.  Your system will look like the third (last) class diagram in Section 12.1 of Lecture 12.

1. read method  Main  in  class Program.
   study the methods  login  and  logout  in class RProxy.
   study methods  loginRemote  and  logoutRemote  in class AccountDB.

2. alter  class RProxy  ONLY: 

   (i) rewrite method  login  to call  remoteDatabase.loginRemote  
       and to construct  new Account(id, ...),  the remote proxy for the Account

   (ii) change method  logout  to call  remoteDatabase.logoutRemote

   YOU WILL CHANGE ONLY 6-8 LINES OF CODE.

3. zip your solution and upload it to KState Online.