Programming Assignment : Distributed Banking System
Problem Description
A distributed banking system consists of a server and some Automated Teller Machines
(ATM). The server manages all users’ account information. A customer can invoke the
following operations at an ATM.
1. void deposit(int acnt, int amt): this operation increases the balance of user account acnt by
amt, and returns nothing;
2. void withdraw(int acnt, int amt): this operation decreases the balance of user account acnt
by amt, and returns nothing;
3. int inquiry(int acnt): this operation returns the balance of user account acnt
For simplicity, in this assignment you do not need to consider the synchronization
problem.
Programming Requirement
You are required to write this client-server (banking system) program which
communicates via RPC. You are recommended to develop this system using
JAVA/RMI (the functionality comes in the package java.rmi). You are free to use other
RPC-like languages instead of JAVA/RMI, as long as your code can perform the same
operations mentioned above.
Specifically, your program should consist of two parts: one for the client and another
for the server. The client (as the ATM) will initiate RPC by sending request message to
the bank server to execute a specified procedure (e.g. deposit) with parameters. Recall
the sequence of events during a RPC:
1. Client procedure calls client stub in normal way
2. Client stub builds message, calls local OS
3. Client's OS sends message to remote OS
4. Remote OS gives message to server stub
5. Server stub unpacks parameters, calls server
6. Server does work, returns result to the stub
7. Server stub packs it in message, calls local OS
8. Server's OS sends message to client's OS
9. Client's OS gives message to client stub
10. Client stub unpacks result, returns to client
Design Requirement
You can use the following interface and class definitions as a starting point for your
project. However, you are free to develop your own interface and class definitions.
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