玩转Java并发工具精通JUC成为并发多面手【15章完整版】 笔记汇总 自己用AQS实现一个简单的线程协作器

对Java并发常见的工具类进行从使用到原理的详解， 包括CAS+AQS+ThreadLocal+ConcurrentHashMap+线程池+各种锁+并发综合实战项目

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package aqs;

import java.util.concurrent.locks.AbstractQueuedSynchronizer;

/**
 * 描述：     自己用AQS实现一个简单的线程协作器
 */
public class OneShotLatch {

    private final Sync sync = new Sync();

    public void signal() {
        sync.releaseShared(0);
    }
    public void await() {
        sync.acquireShared(0);
    }

    private class Sync extends AbstractQueuedSynchronizer {

        @Override
        protected int tryAcquireShared(int arg) {
            return (getState() == 1) ? 1 : -1;
        }

        @Override
        protected boolean tryReleaseShared(int arg) {
           setState(1);

           return true;
        }
    }


    public static void main(String[] args) throws InterruptedException {
        OneShotLatch oneShotLatch = new OneShotLatch();
        for (int i = 0; i < 10; i++) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    System.out.println(Thread.currentThread().getName()+"尝试获取latch，获取失败那就等待");
                    oneShotLatch.await();
                    System.out.println("开闸放行"+Thread.currentThread().getName()+"继续运行");
                }
            }).start();
        }
        Thread.sleep(5000);
        oneShotLatch.signal();

        new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println(Thread.currentThread().getName()+"尝试获取latch，获取失败那就等待");
                oneShotLatch.await();
                System.out.println("开闸放行"+Thread.currentThread().getName()+"继续运行");
            }
        }).start();
    }
}