Spring线程池ThreadPoolExecutor配置并且得到任务执行的结果

用ThreadPoolExecutor的时候，又想知道被执行的任务的执行情况，这时就可以用FutureTask。

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ThreadPoolTask

package com.paul.threadPool;
import java.io.Serializable;
import java.util.concurrent.Callable;
public class ThreadPoolTask implements Callable, Serializable {
  private static final long serialVersionUID = 0;
  // 保存任务所需要的数据
  private Object threadPoolTaskData;
  private static int consumeTaskSleepTime = 2000;
  public ThreadPoolTask(Object tasks) {
    this.threadPoolTaskData = tasks;
  }
  public synchronized String call() throws Exception {
    // 处理一个任务，这里的处理方式太简单了，仅仅是一个打印语句
    System.out.println("开始执行任务：" + threadPoolTaskData);
    String result = "";
    // //便于观察，等待一段时间
    try {
//      long r = 5/0;
      for ( int i= 0 ; i< 100000000 ; i++){  
      } 
      result = "OK";
    } catch (Exception e) {
      e.printStackTrace();
      result = "ERROR";
    }
    threadPoolTaskData = null;
    return result;
  }
}

模拟客户端提交的线程

package com.paul.threadPool;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
public class StartTaskThread implements Runnable{
 private ThreadPoolTaskExecutor threadPoolTaskExecutor;
 private int i;
 public StartTaskThread(ThreadPoolTaskExecutor threadPoolTaskExecutor,int i)
 {
 this.threadPoolTaskExecutor = threadPoolTaskExecutor;
 this.i = i;
 }
 @Override
 public synchronized void run() {
 String task = "task@ " + i;
 System.out.println("创建任务并提交到线程池中：" + task);
 FutureTask futureTask = new FutureTask(
 new ThreadPoolTask(task));
 threadPoolTaskExecutor.execute(futureTask);
 // 在这里可以做别的任何事情
 String result = null;
 try {
 // 取得结果，同时设置超时执行时间为0.1秒。同样可以用future.get()，不设置执行超时时间取得结果
 result = futureTask.get();
 } catch (InterruptedException e) {
 futureTask.cancel(true);
 } catch (ExecutionException e) {
 futureTask.cancel(true);
 } catch (Exception e) {
 futureTask.cancel(true);
 // 超时后，进行相应处理
 } finally {
 System.out.println("task@" + i + ":result=" + result);
 }
}

SPRING配置文件

<?xml version="1.0" encoding="UTF-8" ?>

测试类

package com.paul.threadPool;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
@ContextConfiguration
public class TestThreadPool extends AbstractJUnit4SpringContextTests{
 private static int produceTaskSleepTime = 10;
 private static int produceTaskMaxNumber = 1000;
 @Autowired
 private ThreadPoolTaskExecutor threadPoolTaskExecutor;
 public ThreadPoolTaskExecutor getThreadPoolTaskExecutor() {
 return threadPoolTaskExecutor;
 }
 public void setThreadPoolTaskExecutor(
 ThreadPoolTaskExecutor threadPoolTaskExecutor) {
 this.threadPoolTaskExecutor = threadPoolTaskExecutor;
 }
 @Test
 public void testThreadPoolExecutor()
 {
 // 构造一个线程池
 final ThreadPoolExecutor threadPool = new ThreadPoolExecutor(2, 4, 600,
 TimeUnit.SECONDS, new ArrayBlockingQueue(3),
 new ThreadPoolExecutor.CallerRunsPolicy());
 for (int i = 1; i <= produceTaskMaxNumber; i++) {
 try {
 Thread.sleep(produceTaskSleepTime);
 } catch (InterruptedException e1) {
 e1.printStackTrace();
 }
 new Thread(new StartTaskThread(threadPoolTaskExecutor,i)).start();
 }
 }
}

项目截图(基于maven构建)

Spring线程池ThreadPoolExecutor配置并且得到任务执行的结果

运行截图：

Spring线程池ThreadPoolExecutor配置并且得到任务执行的结果

如果遇到cpu忙执行超过1秒的会返回null

Spring线程池ThreadPoolExecutor配置并且得到任务执行的结果

总结

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Spring线程池ThreadPoolExecutor配置并且得到任务执行的结果

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