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package philosopher;

import java.util.Random;

/**

* Created by kennylbj on 16/8/28.

* Obtain lock in sequence order.

*/

public class Philosopher implements Runnable {

private final int id;

private final Chopstick first, second;

private final Random random;

private int count = 0;

private static final int SLEEP_TIME = 1000;

private volatile boolean stop = false;

public Philosopher(int id, Chopstick left, Chopstick right) {

this.id = id;

if (left.getId() < right.getId()) {

first = left;

second = right;

} else {

first = right;

second = left;

}

this.random = new Random();

}

public int getCount() {

return this.count;

}

public void stop() {

this.stop = true;

}

private void think() throws InterruptedException {

System.out.println("philosopher " + id + " is thinking");

Thread.sleep(random.nextInt(SLEEP_TIME));

}

private void eat() throws InterruptedException{

System.out.println("philosopher " +id + " is eating");

Thread.sleep(random.nextInt(SLEEP_TIME));

}

@Override

public void run() {

try {

while (!stop) {

think();

synchronized (first) {

synchronized (second) {

eat();

}

}

count++;

}

} catch (InterruptedException e) {

System.out.println("failed to run");

}

}

}