NET 4005: Network Applications - The Remote Method Invocation System - IT Assignment Help

Assignment Task:

Objective: 

Objective of this assignment is to write a simple client-server network application using the Remote Procedure Call (RPC)  or the Remote Method Invocation (RMI) system. 

Description: 

You will write a simple air-ticket reservation system, using RPC/RMI mechanism. The reservation server (rsvserver)  maintains the seat availability information and responds to client requests for reservation or availability. For simplicity,  we are concerned about one flight on one date only. The reservation information will be maintained only in memory, no  need to maintain a persistent database. 

The flight contains 30 seats, 5 of business class and 25 of economy class. Price of ticket is a function of availability 

business class - 

first 3 tickets: $500 each 

next 2 tickets: $800 each 

economy class - 

first 10 tickets: $200 each 

second 10 tickets: $300 each 

last 5 tickets : $450 each 

Seats are numbered 1-5 for business class and 6-30 for economy class. For a particular class, the airline always sells  tickets at lowest available price. 

The reservation client (rsvclient) interacts with user and sends requests to the server based on user input. User input is  taken as command line parameters, output is printed on the screen as text. In particular, the client may send the following  requests to the server. 

rsvclient list <server_name> 

lists all available seats in different classes and price ranges. For example, if there is 3 business class seats and 7 economy  class seats available, the output is business class: 

1 seats at $500 each 

2 seats at $800 each 

Seat numbers: 3,6,9 

economy class: 

2 seats at $300 each 

5 seats at $450 each 

Seat numbers: 18,22,25,26,28,29,30 

rsvclient reserve <server_name> <class> <passenger_name> <seat_number> 

reserves the particular seat of the particular class for the particular passenger. Assume passenger name to be a single string  without space. Class name is either “business” or “economy”. Request may fail if invalid seat number is provided  (economy class seat number for business class reservation), or the given seat number is already sold.  

Possible outputs  

Successfully reserved seat #S for passenger N 

Failed to reserve: invalid seat number 

Failed to reserve: seat not available 

rsvclient passengerlist <servername> 

lists all booked passengers for both classes, including the seat number assigned for each of them 

Alice business 2 

Bruce business 5 

Melissa economy 10 

John economy 12 

Eric economy 13  

Implementation details: 

You will implement both the rsvclient and the rsvserver program using either RPC or RMI. If you are more  familiar with C, use RPC, or, if Java is your favorite, use RMI. Your rsvclient should handle all the three user  requests. The rsvserver should maintain the reservation state and respond to the requests from the client pertaining  to all the three functions.

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