Example usage for java.util.concurrent Phaser Phaser

Introduction

In this page you can find the example usage for java.util.concurrent Phaser Phaser.

Prototype

public Phaser() 

Source Link

Document

Creates a new phaser with no initially registered parties, no parent, and initial phase number 0.

Usage

From source file:Main.java

public static void main(String[] args) {
    Phaser phaser = new Phaser() {
        protected boolean onAdvance(int phase, int parties) {
            System.out.println("Inside onAdvance(): phase  = " + phase + ",  Registered Parties = " + parties);
            // Do not terminate the phaser by returning false
            return false;
        }//www .  java 2s  .c o m
    };
    // Register the self (the "main" thread) as a party 
    phaser.register();
    System.out.println("#1: isTerminated():" + phaser.isTerminated());
    phaser.arriveAndDeregister();

    // Trigger another phase advance
    phaser.register();
    phaser.arriveAndDeregister();

    System.out.println("#2: isTerminated():" + phaser.isTerminated());
    phaser.forceTermination();
    System.out.println("#3: isTerminated():" + phaser.isTerminated());
}

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From source file:AdderTask.java

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(/*from  w w w. j a  v a2 s.com*/
                    "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);
}

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From source file:Main.java

private static Long fib(int n) throws InterruptedException {
    AtomicLong result = new AtomicLong();
    Phaser phaser = new Phaser();
    Task initialTask = new Task(n, result, phaser);
    phaser.register();//w ww  .  j a  va 2  s . com
    executors.submit(initialTask);
    phaser.arriveAndAwaitAdvance();
    return result.get();
}

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From source file:nextflow.fs.dx.DxUploadOutputStream.java

/**
 * Initialize the uploader output stream for the specified file
 *
 * @param fileId The target DnaNexus file
 * @param remote The DnaNexus API wrapper object
 * @param maxForks Maximum number of parallel upload jobs allowed (default: 5)
 *//*from   ww  w  .ja  v  a  2  s . c o m*/
public DxUploadOutputStream(String fileId, DxApi remote, int maxForks) {

    this.fileId = fileId;
    this.queue = new ArrayBlockingQueue<>(maxForks);
    this.phaser = new Phaser();
    this.remote = remote;
    this.buf = allocate();
    this.executor = Executors.newCachedThreadPool();
    checkCapacity();
    start();
}

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