It is required to simulate a limited number of devices connected to a router’s Wi-Fi using Java threading and semaphore. Routers can be designed to limit the number of open connections. For example, a Router may wish to have only N connections at any point in time. As soon as N connections are made, the Router will not accept other incoming connections until an existing connection is released. Explain how semaphores can be used by a Router to limit the number of concurrent connections
The following rules should be applied: ➔ The Wi-Fi number of connected devices is initially empty. ➔ If a client is logged in (print a message that a client has logged in) and if it can be served ➔ (means that it can reach the internet), then the client should perform the following activities: ◆ Connect ◆ Perform online activity ◆ Log out ➔ Note: these actions will be represented by printed messages, such that there is a random ➔ waiting time between the printed messages when a client connects, do some online ➔ activities and logged out. ➔ If a client arrives and all connections are occupied, it must wait until one of the currently ➔ available clients finish his service and leave. ➔ After a client finishes his service, he leave and one of the waiting clients (if exist) will ➔ connect to the internet.
You program must contain the following classes:
- Router Class: that contains a list of connections and methods to occupy a connection and release a connection.
- Semaphore Class: as given the synchronization lab.
- 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.
- 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