[SOLVED] CS241 -  Operating System – 1 - Assignment 2 - Java Synchronization

Description

 Solution  Design

 You  program  must  contain  the  following classes:

1. Router Class: that contains a list of connections and methods to occupy a connection and release a connection.
2. Semaphore Class: as given the synchronization lab.
3. Device Class: represent different devices (threads) that can be connected to the router; each device has its own name (i.e. C1) and type (i.e. mobile, pc, tablet…) and it may perform three activities: connect, perform online activity and disconnect/logout.
4. Network Class: this class contains the main method in which the user is asked for two inputs:

• N: max number of connections a router can accept ● TC: total number of devices that wish to connect).
• TC lines that contain: name of each device, and its type

 Program  Output

You will print the output logs in a file, which simulates the execution order of the devices threads and the printed messages of each device

NOTE THAT: This is just an example not the only scenario that can be applied.

 Sample  Input

What is the number of WI-FI Connections?

2 What is the number of devices Clients want to connect?

4

C1 mobile

C2 tablet

C3 pc

C4 pc

 Sample Output

• (C1)(mobile)arrived- (C2)(tablet)arrived
• Connection 1: C1 Occupied- Connection 2: C2 Occupied
• C4(pc) arrived and waiting
• C3(pc)arrived and waiting- Connection 1: C1 login
• Connection 1: C1 performs online activity- Connection 2: C2 login
• Connection 2: C2 performs online activity
• Connection 1: C1 Logged out
• Connection 1 : C4 Occupied- Connection 1 : C4 log in
• Connection 1 : C4 performs online activity
• Connection 2: C2 Logged out- Connection 2: C3 Occupied