[SOLVED] CS241 Assignment #2 -JavaSynchronization

Problemdescription:

• It s required to simulate a limited number of devices connected to a router’s Wi-Fi using Java threading and semaphore. Routers can design 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 connection until an existing connection is released. In this project, I explained how semaphores can be used by a router to limit the number of concurrent connections.

Consider the followingrules:

• TheWi-Fi numberofconnecteddevices is initially
• Ifaclientisloggedin(printamessagethataclienthasloggedin)andifitcanbeserved(meansthat it can reach the internet), thentheclient shouldperform thefollowingactivities:
  1. Connect
  2. Perform online activity
  3. Logout

Note:these actionswillberepresentedbyprintedmessages,suchthatthereisarandomwaitingtimebetweentheprintedmessageswhenaclientconnects,dosomeonlineactivities andloggedout.

• Ifaclientarrivesandallconnectionsareoccupied,itmustwaituntiloneofthecurrentlyavailableclientsfinisheshis service andleave.
• Afteraclientfinisheshisservice,heleaveandoneofthewaitingclients(ifexist)willconnect to the

ProblemDesign

You program must contain thefollowing classes:

1. Router Class: that contains a list of connection and methods to occupya connectionandrelease a
2. SemaphoreClass:asgiven the synchronization
3. DeviceClass:representdifferentdevices(threads)thatcanbeconnectedtotherouter;eachdevicehasitsownname(i.e.C1)andtype(i.e.mobile,pc,tablet…)anditmayperform threeactivities: connect,perform onlineactivityanddisconnect/logout.
4. Network Class: this classcontains themain method in which theuseris asked fortwoinputs:
   • N: maxnumberof connections a routercan accept
   • TC: total numberof devices that wishes to connect).
   • TC lines that contain: name ofeachdevice,andits

ProgramOutput:

You will print the output logs inafile, whichsimulatesthe executionorder ofthedevicesthreads and the printedmessagesofeachdevice.

Example:

Sample Input:

Sample output:(Note:output depends on theorder oftheexecutions of thethreads)