CyclicBarrier使用方法(四)

package com.yonge.lock;

import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 需求：模拟三个人一起去秋游的情景，首先三个人预定好在哪个景点集合，集合完后，又自由活动，又到另外一个景点集合，如此反复...
 * @author wb-gaoy
 * @version $Id: CyclicBarrierTest.java,v 0.1 2012-1-4 下午4:36:12 wb-gaoy Exp $
 */
public class CyclicBarrierTest {

    public static void main(String[] args) {
        ExecutorService service = Executors.newCachedThreadPool();
        final CyclicBarrier cb = new CyclicBarrier(3);
        for (int i = 0; i < 3; i++) {
            Runnable runnable = new Runnable() {
                public void run() {
                    try {
                        Thread.sleep((long) (Math.random() * 10000));
                        System.out.println("线程" + Thread.currentThread().getName()
                                           + "即将到达集合地点1，当前已有" + (cb.getNumberWaiting() + 1)
                                           + "个已经到达，"
                                           + (cb.getNumberWaiting() == 2 ? "都到齐了，继续走啊" : "正在等候"));
                        cb.await();

                        Thread.sleep((long) (Math.random() * 10000));
                        System.out.println("线程" + Thread.currentThread().getName()
                                           + "即将到达集合地点2，当前已有" + (cb.getNumberWaiting() + 1)
                                           + "个已经到达，"
                                           + (cb.getNumberWaiting() == 2 ? "都到齐了，继续走啊" : "正在等候"));
                        cb.await();
                        Thread.sleep((long) (Math.random() * 10000));
                        System.out.println("线程" + Thread.currentThread().getName()
                                           + "即将到达集合地点3，当前已有" + (cb.getNumberWaiting() + 1)
                                           + "个已经到达，"
                                           + (cb.getNumberWaiting() == 2 ? "都到齐了，继续走啊" : "正在等候"));
                        cb.await();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            };
            service.execute(runnable);
        }
        service.shutdown();
    }
}