eigenes/src/Philosopher.java gelöscht
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package pp;
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import java.util.concurrent.locks.Lock;
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import java.util.Random;
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import java.util.concurrent.locks.Condition;
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import java.util.concurrent.locks.ReentrantLock;
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public class Philosopher extends Thread implements IPhilosopher {
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private Philosopher left;
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private Philosopher right;
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private int seat;
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private Lock table;
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private Condition tableIsFull;
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private final Random random = new Random();
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private volatile boolean stopped;
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private volatile boolean eating;
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@Override
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public void setLeft(IPhilosopher left) {
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this.left = (Philosopher) left;
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}
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@Override
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public void setRight(IPhilosopher right) {
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this.right = (Philosopher) right;
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}
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@Override
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public void setSeat(int seat) {
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this.seat = seat;
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}
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@Override
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public void setTable(Lock table) {
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this.table = (ReentrantLock) table;
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tableIsFull = table.newCondition();
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}
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@Override
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public void stopPhilosopher() {
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this.stopped = true;
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interrupt();
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}
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private void eat() {
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table.lock();
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try {
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while(this.left.eating || this.right.eating) {
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tableIsFull.await();
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}
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this.eating = true;
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Thread.sleep(this.random.nextInt(PhilosopherExperiment.MAX_TAKING_TIME_MS));
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table.unlock();
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System.out.println("Philosoper at s: " + seat + " is eating");
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Thread.sleep(this.random.nextInt(PhilosopherExperiment.MAX_EATING_DURATION_MS));
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System.out.println("Philosopher at s: " + seat + " has finished eating.");
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this.eating = false;
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} catch (Exception e) {
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this.stopPhilosopher();
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} finally {
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if(this.stopped) {
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table.unlock();
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}
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}
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}
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private void think(){
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table.lock();
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try {
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right.tableIsFull.signal();
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left.tableIsFull.signal();
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table.unlock();
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Thread.sleep(this.random.nextInt(PhilosopherExperiment.MAX_THINKING_DURATION_MS));
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} catch (InterruptedException e) {
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this.stopPhilosopher();
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}
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}
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@Override
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public void run() {
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try {
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while(!this.stopped) {
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think();
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eat();
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}
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} catch(Exception e) {
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Thread.currentThread().interrupt();
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}
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}
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}
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