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CyclicBarrierTest.java
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67 lines (60 loc) · 1.97 KB
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package Thread.concurrent;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
/*
* CycliBarrier用法：
* 模拟所有写操作完成才能进行下面的操作
*
* */
public class CyclicBarrierTest {
private static int count=4;
public static void main(String[] args) {
CyclicBarrier cyclicBarrier=new CyclicBarrier(count, new Runnable() {
@Override
public void run() {
//这里从四个线程中随机抽取一个线程来完成
System.out.println("所有线程的写入操作已经完成，当前线程是："+Thread.currentThread().getName());
}
});
ExecutorService service=Executors.newCachedThreadPool();
for(int i=0;i<count;i++)
service.execute(new Writer(cyclicBarrier));
try {
//阻塞住main线程，让其他线程执行
TimeUnit.MICROSECONDS.sleep(4000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//CyclicBarrier重用
System.out.println("重用CylicBarrer-------");
for(int i=0;i<count;i++)
service.execute(new Writer(cyclicBarrier));
}
}
class Writer implements Runnable{
public CyclicBarrier cyclicBarrier;
public Writer(CyclicBarrier cyclicBarrier){
this.cyclicBarrier=cyclicBarrier;
}
@Override
public void run() {
try {
System.out.println(Thread.currentThread().getName()+"写操作开始");
//sleep模拟写操作
TimeUnit.MICROSECONDS.sleep(1000);
System.out.println(Thread.currentThread().getName()+"写操作结束,等待其他线程写操作结束...");
cyclicBarrier.await();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (BrokenBarrierException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+"线程的写入操作完成");
}
}