Phaser提供了动态增parties计数,这点比CyclicBarrier类操作parties更加方便。它是jdk1.7新增的类,今天我们就来学习一下它的用法。尘埃落定之后,回忆别来挑拨。

Phaser的简单使用

一、Phaser的arriveAndAwaitAdvance方法使用

package com.linux.thread.thread;

import java.util.concurrent.Phaser;

public class PhaserRun1 {
public static void main(String[] args) {
Phaser phaser = new Phaser(3);
for (int i = 0; i < 3; i++) {
ThreadA threadA = new ThreadA(phaser);
threadA.start();
}
} static class ThreadA extends Thread {
private Phaser phaser; public ThreadA(Phaser phaser) {
this.phaser = phaser;
} @Override
public void run() {
System.out.println(Thread.currentThread().getName() + " A begin " + System.currentTimeMillis());
phaser.arriveAndAwaitAdvance();
System.out.println(Thread.currentThread().getName() + " A end " + System.currentTimeMillis());
}
}
}

一次运行的结果如下:

Thread- A begin
Thread- A begin
Thread- A begin
Thread- A end
Thread- A end
Thread- A end

修改上述的main方法的代码如下:

public static void main(String[] args) throws InterruptedException{
Phaser phaser = new Phaser(3);
phaser.register();
for (int i = 0; i < 3; i++) {
ThreadA threadA = new ThreadA(phaser);
threadA.start();
}
Thread.sleep(5000);
phaser.arriveAndDeregister();
}

运行的效果如下:

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alt="" />

  通过若干个方法来控制多个线程之间同步运行的效果,还可以实现针对某一个线程取消同步运行的效果,而且支持在指定屏障处等待,在等待时还支持中断或非中断等功能,使用Java并发类对线程进行分组同步控制时,Phaser比CyclicBarrier类功能更加强大,建议使用。

友情链接

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