AdderTask.java Source code

Introduction

Here is the source code for AdderTask.java

Source

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Phaser;

class AdderTask extends Thread {
    private Phaser phaser;
    private String taskName;
    private List<Integer> list;

    public AdderTask(String taskName, Phaser phaser, List<Integer> list) {
        this.taskName = taskName;
        this.phaser = phaser;
        this.list = list;
    }

    @Override
    public void run() {
        do {
            System.out.println(taskName + "  added  " + 3);
            list.add(3);
            phaser.arriveAndAwaitAdvance();
        } while (!phaser.isTerminated());
    }
}

public class Main {
    public static void main(String[] args) {
        final int PHASE_COUNT = 2;
        Phaser phaser = new Phaser() {
            public boolean onAdvance(int phase, int parties) {
                System.out.println(
                        "Phase:" + phase + ", Parties:" + parties + ",  Arrived:" + this.getArrivedParties());
                boolean terminatePhaser = false;
                if (phase >= PHASE_COUNT - 1 || parties == 0) {
                    terminatePhaser = true;
                }

                return terminatePhaser;
            }
        };
        List<Integer> list = Collections.synchronizedList(new ArrayList<Integer>());
        int ADDER_COUNT = 3;
        phaser.bulkRegister(ADDER_COUNT + 1);
        for (int i = 1; i <= ADDER_COUNT; i++) {
            String taskName = "Task  #" + i;
            AdderTask task = new AdderTask(taskName, phaser, list);
            task.start();
        }
        while (!phaser.isTerminated()) {
            phaser.arriveAndAwaitAdvance();
        }
        int sum = 0;
        for (Integer num : list) {
            sum = sum + num;
        }
        System.out.println("Sum = " + sum);
    }
}