CyclicBarrier

package com.example.completablefuture;

import com.example.completablefuture.common.CommonUtil;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

public class CyclicBarrierTest {
    public static void main(String[] args) {
        CyclicBarrier cyclicBarrier = new CyclicBarrier(3);
        for (int i = 1; i <= 3; i++) {
            final int i1 = i;
            new Thread(() -> {
                try {
                    CommonUtil.log("sleep" + i1 * 1000L);
                    Thread.sleep(i1 * 1000L);
                    cyclicBarrier.await(); // 每一个线程调用await，计数器的值就会加1，当计数值的值达到3，所有阻塞的线程就会执行。
                    CommonUtil.log("sleep" + i1 * 1000L + "后的业务");
                } catch (InterruptedException | BrokenBarrierException e) {
                    e.printStackTrace();
                }
            }, "task_" + i).start();
        }
    }
}