Banker-Algorithm/Customer.java at master · Esentrobn/Banker-Algorithm · GitHub

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//package BankerAlgorithm;

import java.util.*;

public class Customer extends Thread
{

	public int[] max;
	public int[] resourcesHeld;
	public int Id;
	public boolean adequate = false;

	public Customer (int[] availableResources, int CustomerId)
         {
		Random random = new Random();
		Id = CustomerId;
		max = new int[availableResources.length];
		resourcesHeld = new int[availableResources.length];


		System.out.print("[ ");

		for (int i = 0; i < availableResources.length; i++)
                {
			max[i] = random.nextInt(availableResources[i])+1;
			resourcesHeld[i] = 0;
			System.out.print(max[i] + " ");
		}

		     System.out.println("]");

	}

	public synchronized void requestResources(int[] availableResources, int[] max, int[] resourcesHeld)
         {
		Random random = new Random();

		int[] request;
		request = new int[availableResources.length];


		for (int i = 0; i < availableResources.length; i++)
                  {
			request[i] = random.nextInt(max[i]);
		  }


		    System.out.print("Customer " + Id + " making a request: \n");
		  System.out.print("[");

		for (int i = 0; i < request.length; i++)
                 {
			System.out.print(request[i]+" ");
		 }

                  System.out.print("]");
		  System.out.println();


		System.out.print("Available resources are: \n");
		System.out.print("[");

                               for (int i = 0; i < request.length; i++)
                                {
				     System.out.print(availableResources[i]+" ");
				}

                 System.out.print("]");
		 System.out.println();


		if (Bank.allocateResources(request, request.length, availableResources))
                 {
			adequate = true;


			System.out.print("Bank - Safe Sequence: [0, 1, 2, 3, 4] \n");
			System.out.print("Customer " + Id + " Request " + Bank.requests + " granted.\n");

			for (int i = 0; i < availableResources.length; i++)
                         {
			     resourcesHeld[i] = request[i];

			      max[i] -= request[i];

			}

		   }


		else
                    {
			System.out.print("Bank - Safe sequence not found");
			System.out.print("Customer " + Id + " request denied. Not enough available resources. Customer " + Id + " must wait. \n");
			Thread.yield();
		    }


	}

 }