OS Lab 3.3

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Scanner;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;

/**
 *
 * @author ristes
 */
public class TribeDinner {

    // TODO: definirajte gi semaforite i ostanatite promenlivi ovde (mora site
    // da se static)

    public static Semaphore jadachi;
    public static Semaphore proverka;
    /**
     * Metod koj treba da gi inicijalizira vrednostite na semaforite i
     * ostanatite promenlivi za sinhronizacija.
     *
     *
     * TODO: da se implementira
     *
     */
    public static void init(int numBarbers) {
        jadachi = new Semaphore(3);
        proverka = new Semaphore(1);
    }

    static class TribeMember extends TemplateThread {

        public TribeMember(int numRuns) {
            super(numRuns);
        }

        /**
         * Da se implementira odnesuvanjeto na ucesnikot spored uslovite na
         * zadacata.
         */
        public void execute() throws InterruptedException {
            // nesinhronizirano scenario

            proverka.acquire();
            if (!state.isPotEmpty()) {
                proverka.release();

                jadachi.acquire();
                state.fillPlate();
                jadachi.release();

                state.eat();
            } else {
                state.cook();
                proverka.release();
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="This is the template code" >
    static State state;

    static class State {

        private static final String _10_JADENJETO_NE_E_PARALELIZIRANO = "jadenjeto ne e paralelizirano. Site jadat eden po eden";
        private static final String _10_PRISTAPOT_DO_KAZANOT_NE_E_PARALELIZIRAN = "Pristapot do kazanot ne e paraleliziran. Treda da moze do trojca paralelno da zemaat hrana.";

        private static final String _10_DVAJCA_ISTOVREMENO_PROVERUVAAT = "Dvajca istovremeno proveruvaat dali kazanot e prazen. Maksimum eden e dozvoleno.";
        private static final String _7_NEMA_MESTO_POKRAJ_KAZANOT = "Nema mesto pokraj kazanot. Maksimum tri clena moze da zemaat hrana istovremeno.";
        private static final String _5_NE_MOZE_DA_JADE_OD_PRAZEN_KAZAN = "Ne moze da jade od prazen kazan. Treba da se povika 'state.cook()'";
        private static final String _5_NE_MOZE_DA_SE_GOTVI_VO_KAZAN_KOJ_NE_E_PRAZEN = "Ne moze da se gotvi vo kazan koj ne e prazen";

        private static final Random RANDOM = new Random();
        private static final int POT_CAPACITY = 15;

        private LimitedCounter platesLeft = new LimitedCounter(0, null, 0,
                null, 0, 5, _5_NE_MOZE_DA_JADE_OD_PRAZEN_KAZAN);

        private LimitedCounter checks = new LimitedCounter(0, 1, 10,
                _10_DVAJCA_ISTOVREMENO_PROVERUVAAT, null, 0, null);

        private LimitedCounter fills = new LimitedCounter(0, 3, 7,
                _7_NEMA_MESTO_POKRAJ_KAZANOT, null, 0, null);

        private LimitedCounter eat = new LimitedCounter(0);

        public State() {

        }

        public boolean isPotEmpty() throws RuntimeException {
            log(checks.incrementWithMax(), "proverka dali ima hrana vo kazanot");
            sleep(5);
            boolean res = platesLeft.getValue() == 0;
            log(checks.decrementWithMin(), null);
            return res;
        }

        public void fillPlate() throws RuntimeException {
            log(fills.incrementWithMax(), "zemanje na hrana");
            log(platesLeft.decrementWithMin(), null);
            sleep(5);
            log(platesLeft.incrementWithMax(), null);
            log(fills.decrementWithMin(), null);
        }

        public void eat() throws RuntimeException {
            log(eat.incrementWithMax(), "jadenje");
            sleep(10);
            log(eat.decrementWithMin(), null);
        }

        public void cook() throws RuntimeException {
            synchronized (State.class) {
                if (platesLeft.getValue() == 0) {
                    platesLeft.setValue(POT_CAPACITY);
                } else {
                    PointsException e = new PointsException(5,
                            _5_NE_MOZE_DA_SE_GOTVI_VO_KAZAN_KOJ_NE_E_PRAZEN);
                    log(e, null);
                }
            }
        }

        public void finalize() {
            if (fills.getMax() == 1) {
                logException(new PointsException(10,
                        _10_PRISTAPOT_DO_KAZANOT_NE_E_PARALELIZIRAN));
            }
            if (eat.getMax() == 1) {
                logException(new PointsException(10,
                        _10_JADENJETO_NE_E_PARALELIZIRANO));
            }
        }

        private List<String> actions = new ArrayList<String>();

        private void sleep(int range) {
            try {
                Thread.sleep(RANDOM.nextInt(range));
            } catch (InterruptedException e) {
            }
        }

        protected TemplateThread getThread() {
            TemplateThread t = (TemplateThread) Thread.currentThread();
            return t;
        }

        private synchronized void log(PointsException e, String action) {
            TemplateThread t = (TemplateThread) Thread.currentThread();
            if (e != null) {
                t.setException(e);
                actions.add(t.toString() + "\t(e): " + e.getMessage());
            } else if (action != null) {
                actions.add(t.toString() + "\t(a): " + action);
            }
        }

        private synchronized void logException(PointsException e) {
            actions.add("\t(e): " + e.getMessage());
        }

        public synchronized void printLog() {
            System.out
                    .println("Poradi konkurentnosta za pristap za pecatenje, mozno e nekoja od porakite da ne e na soodvetnoto mesto.");
            System.out.println("Log na izvrsuvanje na akciite:");
            System.out.println("=========================");
            System.out.println("tip\tid\titer\takcija/error");
            System.out.println("=========================");
            for (String l : actions) {
                System.out.println(l);
            }
        }

        public void printStatus() {
            finalize();
            if (!TemplateThread.hasException) {
                int poeni = 25;
                if (PointsException.getTotalPoints() == 0) {
                    System.out
                            .println("Procesot e uspesno sinhroniziran. Osvoeni 25 poeni.");
                } else {
                    poeni -= PointsException.getTotalPoints();
                    PointsException.printErrors();
                    System.out.println("Maksimalni osvoeni poeni: " + poeni);
                }

            } else {
                System.out
                        .println("Procesot ne e sinhroniziran spored uslovite na zadacata");
                printLog();
                System.out
                        .println("====================================================");
                PointsException.printErrors();
                int total = (25 - PointsException.getTotalPoints());
                if (total < 0) {
                    total = 0;
                }
                System.out.println("Maksimum Poeni: " + total);
            }

        }
    }

    static class LimitedCounter {

        private int value;
        private Integer maxAllowed;
        private Integer minAllowed;
        private int maxErrorPoints;
        private int minErrorPoints;
        private String maxErrorMessage;
        private String minErrorMessage;

        private int max;

        public LimitedCounter(int value) {
            super();
            this.value = value;
            this.max = value;
        }

        public LimitedCounter(int value, Integer maxAllowed,
                              int maxErrorPoints, String maxErrorMessage, Integer minAllowed,
                              int minErrorPoints, String minErrorMessage) {
            super();
            this.value = value;
            this.max = value;
            this.maxAllowed = maxAllowed;
            this.minAllowed = minAllowed;
            this.maxErrorPoints = maxErrorPoints;
            this.minErrorPoints = minErrorPoints;
            this.maxErrorMessage = maxErrorMessage;
            this.minErrorMessage = minErrorMessage;
        }

        public int getMax() {
            return max;
        }

        public int getValue() {
            return value;
        }

        public void setValue(int value) {
            this.value = value;
        }

        public PointsException incrementWithMax() {
            synchronized (LimitedCounter.class) {
                value++;
                if (value > max) {
                    max = value;
                }
                if (maxAllowed != null) {
                    if (value > maxAllowed) {
                        PointsException e = new PointsException(maxErrorPoints,
                                maxErrorMessage);
                        return e;
                    }
                }
            }
            return null;
        }

        public PointsException decrementWithMin() {
            synchronized (LimitedCounter.class) {
                value--;
                if (minAllowed != null) {
                    if (value < minAllowed) {
                        PointsException e = new PointsException(minErrorPoints,
                                minErrorMessage);
                        return e;
                    }
                }
            }
            return null;
        }
    }

    abstract static class TemplateThread extends Thread {

        static boolean hasException = false;
        int numRuns = 1;
        public int iteration = 0;
        protected Exception exception = null;

        public TemplateThread(int numRuns) {
            this.numRuns = numRuns;
        }

        abstract void execute() throws InterruptedException;

        @Override
        public void run() {
            try {
                for (int i = 0; i < numRuns && !hasException; i++) {
                    execute();
                    iteration++;

                }
            } catch (InterruptedException e) {
                // Do nothing
            } catch (Exception e) {
                exception = e;
                hasException = true;
            }
        }

        public void setException(Exception exception) {
            this.exception = exception;
            hasException = true;
        }

        @Override
        public String toString() {
            Thread current = Thread.currentThread();
            if (numRuns > 1) {
                return String.format("%s\t%d\t%d", ""
                                + current.getClass().getSimpleName().charAt(0),
                        getId(), iteration);
            } else {
                return String
                        .format("%s\t%d\t", ""
                                        + current.getClass().getSimpleName().charAt(0),
                                getId());
            }
        }
    }

    static class PointsException extends RuntimeException {

        private static HashMap<String, PointsException> exceptions = new HashMap<String, PointsException>();
        private int points;

        public PointsException(int points, String message) {
            super(message);
            this.points = points;
            exceptions.put(message, this);
        }

        public static int getTotalPoints() {
            int sum = 0;
            for (PointsException e : exceptions.values()) {
                sum += e.getPoints();
            }
            return sum;
        }

        public static void printErrors() {
            System.out.println("Gi imate slednite greski: ");
            for (Map.Entry<String, PointsException> e : exceptions.entrySet()) {
                System.out.println(String.format("[%s] : (-%d)", e.getKey(), e
                        .getValue().getPoints()));
            }
        }

        public int getPoints() {
            return points;
        }
    }

    public static void main(String[] args) {
        try {
            start();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public static void start() throws Exception {
        Scanner s = new Scanner(System.in);
        int brKonzumeri = s.nextInt();
        int numCustomerRuns = s.nextInt();
        init(brKonzumeri);

        state = new State();
        HashSet<Thread> threads = new HashSet<Thread>();

        for (int i = 0; i < brKonzumeri; i++) {
            TribeMember c = new TribeMember(numCustomerRuns);
            threads.add(c);
            c.start();
        }
        try {
            Thread.sleep(50);
        } catch (Exception e) {
            // do nothing
        }

        for (Thread t : threads) {
            t.join(1000);
        }

        for (Thread t : threads) {
            if (t.isAlive()) {
                t.interrupt();
                if (t instanceof TemplateThread) {
                    TemplateThread tt = (TemplateThread) t;
                    tt.setException(new PointsException(25, "DEADLOCK"));
                }
            }
        }
        s.close();
        state.printStatus();
    }
    // </editor-fold>
}