CS 843 - Distributed Computing Systems - Program 3 - Name:_____________
                                                                               
   Assgined: Monday, April 9, 2003
   Due with bonus: Wednesday, April 30, 2003
   Due: Monday, May 5, 2003
   Revise: Tuesday, April 29 (Bonous Points Information)

   (100 points)

   o Put your name and add some necessary comments into these code when
     necessary. These are a part of grading in this assignment.

   o Write documents describing the programs you create including:

    (1) Software installation guide (README, makefile)
    (2) Protocol specifications
    (3) Software user guide
    (4) Experimental results and analysis

   o Use the handin system to submit all code and documents electronically. 
     The submission ID is 3.

   o The following Grading policies are usually applied:
     Programs
       the program runs correctly    55%
       inline comments               10%
       readability of the program    5%
       common error checking	     10%

     Design documents                
       quality of design             10%
       readability of document       10%

   o Bonus Points (20 points)

     Programs are written in both Java and C++. 

   o The maximum total bonus points incluing the early submission is 
     25 points.

   1. Write an online "voting" system using CORBA. In this voting system, 
      a CORBA server is used to accept requests from at least three 
      different CORBA clients. CORBA server should be able to handle 
      multiple clients at one time. A CORBA IDL file could be specified 
      in the following way (For your implementation, you can specify
      your IDL file.):

      module VoteApp
      {
        struct name {
          string first_name;
          string last_name;
        };

        typedef sequence<string> strings;
        typedef sequence<name> names;

        interface Vote
        {
          /* 
           * login - pass the login name/password pair and return a list 
           *         of the election sessions. Only authorized persons are 
           *         allowed to log into the voting system. 
           */
          strings login (in strings log_pass);
          /*
           * list - pass the session number and return a list of 
           *          candidates in this session. Each session is 
           *          numbered so voters can select a session by its number.
           */
          names list (in unsigned short number);
          /*
           * nominate - nominate a candidate and return the designated 
           *            number of the candidate in this session.
           */
          unsigned short nominate (in name candidate);
          /*
           * withdraw - withdraw a candidate and return the total
           *            candidates in this session.  
           */
          unsigned short withdraw (in unsigned short number);
          /*
           * vote - cast the vote (the designated number of the candidate) 
           *        and return the voting result if the result is available.
           */
          string vote (in unsigned short number);
        };
      };
  
      Intialially, a file (files) including the voter/password list, voting 
      sessions, and their vaild duration is (are) read by the server. There 
      should the deadline for nomination and voting in the file (files). The 
      client is used to log into the system, select the election session, 
      nominate/withdraw the candiate, list the candidate, cast the vote 
      and show the result. In client, input of "q" or "quit" should cause the 
      client to terminate.

      Possible files:

      voters
      jleno:Jay Leno:abc123
      jdoe:Jane Doe:123abc
           .
           .

      session
      President:03/03/03, 03/04/03
      Senator:03/03/03, 03/04/03
            .
            .

      Note: Each voter can only cast one vote.