Simulator.java

import java.util.Scanner;

public class Simulator implements Runnable {
	//This class will be used to gather and print statistics for the simulation run
	//as well as being the place where the simulation is actually run
	//It will also compare two or more different scheduling algorithms
	
	
	public static void main(String[] args) {
		Thread t = new Thread(new Simulator());
		t.start();
	}
	
	//create objects of every other class.


	public void run() {
		Machine comp = Machine.getInstance();
		
		QueueManager queue = new QueueManager(1);
		queue.setDefaultDeviceTable();
		queue.setDefaultResourceTable();		
		
		int response = 1;
		
		while (response > 0){
			
			System.out.println("Welcome to the Scheduling Simulator");
			System.out.println();
			System.out.println("Select an option, then press Enter");
			System.out.println("0. Exit");
			System.out.println("1. Use Default Set of Processes");
			System.out.println("2. Add Process");
			System.out.println("3. Run Simulator");
			System.out.println("4. Change Scheduling Type");
			System.out.println("5. Print Device Table");
			System.out.println("6. Print Resource Table");
			System.out.println("7. Reset Queues");
			
			@SuppressWarnings("resource")
			Scanner reader = new Scanner(System.in);
			response=reader.nextInt();
			
			switch (response){
			case 1:
				queue.emptyQueues();
				//						pid name pri size subtime  burst	dev req		res req
				Process p1 = new Process(1,"p1", 1, 	5,	0, 		6, 		"D-1 D-2", "R-1 R-3");
				Process p2 = new Process(2,"p2", 2, 	3,	3, 		1,  	"D-4 D-2", "R-2 R-5");
				Process p3 = new Process(3,"p3", 1, 	10,	3, 		3,  	"D-1 D-2", "R-1 R-3");
				Process p4 = new Process(4,"p4", 3, 	97,	3, 		2,  	"D-8 D-9", "R-9 R-10");
				Process p5 = new Process(5,"p5", 1, 	42,	6, 		9,  	"D-1 D-2", "R-1 R-2");

				queue.addProcess(p1);
				queue.addProcess(p2);
				queue.addProcess(p3);
				queue.addProcess(p4);
				queue.addProcess(p5);
				System.out.println("Done...");
				break;
			case 2:
				int moreProcessFlag = 1;
				int moreDeviceFlag = 1;
				int moreResourceFlag = 1;
				String name;
				int size;
				int pid;
				int prio;
				int subtime;
				int bursts;
				String devices = "";
				String resources = "";
				while (moreProcessFlag == 1){
					System.out.println("Please enter a name for the process");
					name = reader.next();
					System.out.println("Please enter an integer pid");
					pid = reader.nextInt();
					System.out.println("Please enter an integer priority > 0");
					prio = reader.nextInt();
					System.out.println("Please enter an integer number of RAM pages required > 0");
					size = reader.nextInt();
					System.out.println("Please enter an integer submit time > 0");
					subtime = reader.nextInt();
					System.out.println("Please enter an integer number of bursts > 0");
					bursts = reader.nextInt();
					while (moreDeviceFlag == 1)
					{
						System.out.println("Please enter required device in the format \"D-x\", where x is an integer");
						devices += " " + reader.next();
						System.out.println("Would you like to enter more devices? 1 for yes, 0 for no");
						moreDeviceFlag = reader.nextInt();
					}
					while (moreResourceFlag == 1)
					{
						System.out.println("Please enter required resources in the format \"R-x\", where x is an integer");
						resources += " " + reader.next();
						System.out.println("Would you like to enter more resources? 1 for yes, 0 for no");
						moreResourceFlag = reader.nextInt();
						
					}
					Process pTemp = new Process (pid, name, prio, size, subtime, bursts, devices, resources);
					queue.addProcess(pTemp);
					//add process
					System.out.println("Process Added");
					System.out.println("Enter 1 to add another process, 0 to return to main menu");
					moreProcessFlag = reader.nextInt();
				}
				break;
			case 3:
				//run simulation
				while (!queue.isFinished()){
					System.out.println(queue.toString());
					queue.update();
					queue.toString();
					queue.cycleIncrement();
					try {
						Thread.sleep(1000);
					} catch(InterruptedException ex) {
					    Thread.currentThread().interrupt();
					
					}
				}
				System.out.println(queue.toString());
				double avgWaitTime = 0.0;
				int numOfProcs = 0;
				for (Process p : queue.getTerminateQueue()){
					avgWaitTime += p.getWaitTime();
					numOfProcs++;
				}
				avgWaitTime /= numOfProcs;
				System.out.println("Average Wait Time: " + avgWaitTime);
				System.out.println("Simulation Done!");
				break;
			case 4:
				//change scheduling
				System.out.println("Pick one of the following option:");
				System.out.println("1. First-Come First-Serve");
				System.out.println("2. Shortest Job First");
				System.out.println("3. Priotiry Scheduling");
				queue.setScheduler(reader.nextInt());
				System.out.println("Scheduler Changed!");
				break;
			case 5:
				System.out.println(Device.getTableInfo());
				break;
			case 6:
				System.out.println(Resource.getTableInfo());
				break;
			case 7:
				queue.emptyQueues();
			default:
				System.out.println("Goodbye!");
				break;
			}
		}
		
	}

	
	
}