ConcurrentLinkedQuene --------并发队列

/**
 * Alipay.com Inc.
 * Copyright (c) 2004-2018 All Rights Reserved.
 */
package com.weigu.controller;

import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @author 886644
 * @version $Id: ConcurrentLinkedQuene.java, v 0.1 2018/9/4 16:23 886644 Exp $
 */
public class ConcurrentLinkedQueneTest {
    /**
     * 通过无锁的方式,实现了高并发下的高性能,
     */
    private static ConcurrentLinkedQueue queue = new ConcurrentLinkedQueue<>();
    //~~线程个数
    private static int count = 2;
    //~~CountDownLatch,一个同步铺住类,允许一个或者多个线程一直等待;
    private static CountDownLatch countDownLatch = new CountDownLatch(count);

    public static void main(String[] args) throws InterruptedException {
        long timeMillis = System.currentTimeMillis();

        ExecutorService es = Executors.newFixedThreadPool(4);
        ConcurrentLinkedQueneTest.offer();
        for (int i = 0; i < count; i++) {
            es.submit(new Poll());
        }
        countDownLatch.await();//使的主线程阻塞,,直到为零才继续执行;
        es.shutdown();
    }

    /**
     * 生产
     */
    private static void offer() {
        for (int i = 0; i < 10000; i++) {
            queue.offer(i);
        }
    }

    /**
     * add()和offer()添加的两个方法
     * poll()和peek()都是取头元素节点,区别在于前者会删除元素,后者不会
     */
    static class Poll implements Runnable {

        @Override
        public void run() {
            while (!queue.isEmpty()) {
                System.out.println(queue.poll());
            }
            countDownLatch.countDown();
        }
    }
}