Scheduler.java

package pt.processingQueues.principal;

import java.util.ArrayList;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
 * Takes clients generated by the ClientGenerator and puts them in a Queue(SupermarketCheckout).
 * @author Chiti
 *
 */
public class Scheduler implements Runnable{
	private static final Logger LOGGER = Logger.getLogger(Scheduler.class.getName());
    private ArrayList<SupermarketCheckout> queues=new ArrayList<SupermarketCheckout>();
    private BlockingQueue<Client> clients=new ArrayBlockingQueue<Client>(100);
    private boolean isRunning;
    public Scheduler(){
    	this.isRunning=true;
    }
	@Override
	public void run() {
		LOGGER.info("Logger Name: "+LOGGER.getName());
        while (true) {
            while (isRunning) {
                if (queues.size() > 0 && clients.size() > 0) {
                	SupermarketCheckout queue = getMin();
                    Client client=new Client();
					try {
						client = clients.take();
					} catch (InterruptedException e) {
						LOGGER.log(Level.SEVERE, "Cannot take a client from queue", e);
					}
                    queue.addClient(client);
                }
            }
        }
	}
	/**
	 * adds a client from the clientGenerator
	 * @param client
	 */
	public void addClient(Client client){
		try {
			this.clients.put(client);
		} catch (InterruptedException e) {
			LOGGER.log(Level.SEVERE, "Cannot add a client to schedulers queue", e);
		}
	}
	private SupermarketCheckout getMin(){
		int min = queues.get(0).getClients().size();
		SupermarketCheckout minQueue = queues.get(0);
        for (SupermarketCheckout queue : queues) {
            if (queue.getClients().size()< min) {
                min = queue.getClients().size();
                minQueue=queue;
            }
        }
        return minQueue;
	}
	/**
	 * adds a checkout in the scheduler
	 * @param queue
	 */
	public void addSupermarketCheckout(SupermarketCheckout queue){
		System.out.println(queue.toString()+" was added!");
		this.queues.add(queue);
	}
	/**
	 * @return the queues
	 */
	public ArrayList<SupermarketCheckout> getQueues() {
		return queues;
	}
	/**
	 * @param queues the queues to set
	 */
	public void setQueues(ArrayList<SupermarketCheckout> queues) {
		this.queues = queues;
	}
	/**
	 * @return the clients
	 */
	public BlockingQueue<Client> getClients() {
		return clients;
	}
	/**
	 * @param clients the clients to set
	 */
	public void setClients(BlockingQueue<Client> clients) {
		this.clients = clients;
	}
	/**
	 * @return the isRunning
	 */
	public boolean isRunning() {
		return isRunning;
	}
	/**
	 * @param isRunning the isRunning to set
	 */
	public void setRunning(boolean isRunning) {
		this.isRunning = isRunning;
	}
  
}