CountDownLatch MyUncaughtExceptionHandler

package com.yd.wmsc.util;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.CountDownLatch;

public class CountDownLatchDemo {  
    final static SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
    public static void main(String[] args) throws InterruptedException { 
        CountDownLatch latch=new CountDownLatch(2);//两个工人的协作  
        Worker worker1=new Worker("zhang san", 5000, latch);  
        Worker worker2=new Worker("li si", 8000, latch);  
        worker1.setUncaughtExceptionHandler(new MyUncaughtExceptionHandler(latch)); 
        worker2.setUncaughtExceptionHandler(new MyUncaughtExceptionHandler(latch)); 
        worker1.start();  
        worker2.start(); 
       
        latch.await();//等待所有工人完成工作  
        System.out.println("all work done at "+sdf.format(new Date()));  
    }  
      
      
    static class Worker extends Thread{  
        String workerName;   
        int workTime;  
        CountDownLatch latch;  
        public Worker(String workerName ,int workTime ,CountDownLatch latch){  
             this.workerName=workerName;  
             this.workTime=workTime;  
             this.latch=latch;  
        }  
        public void run(){  
            System.out.println("Worker "+workerName+" do work begin at "+sdf.format(new Date()));  
            doWork();//工作了  
            System.out.println("Worker "+workerName+" do work complete at "+sdf.format(new Date()));  
            latch.countDown();//工人完成工作，计数器减一  
  
        }  
          
        private void doWork(){  
            System.out.println(String.valueOf(null));
            try {  
                Thread.sleep(workTime);  
            } catch (InterruptedException e) {  
                e.printStackTrace();  
            }  
        }  
    }  
}

package com.yd.wmsc.util;

import java.util.concurrent.CountDownLatch;

import org.apache.log4j.Logger;

public class MyUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler{

    private static final Logger logger = Logger.getLogger(MyUncaughtExceptionHandler.class);
    
    private CountDownLatch latch;
    
    public MyUncaughtExceptionHandler(CountDownLatch latch){
        this.latch = latch;
    }
    
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        logger.error("An exception has been captured,Thread:" + t.getId() + ",ThreadName:" + t.getName() + ",Thread status:"  + t.getState(), e);
        latch.countDown();
    }

}