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

spring线程池ThreadPoolExecutor配置并且得到任务执行的结果http://www.bieryun.com/1170.html

用的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。

ThreadPoolTask

01 package com.zuidaima.threadpool;
02
03 import java.io.Serializable;
04 import java.util.concurrent.Callable;
05
06 public class ThreadPoolTask implements Callable<String>, Serializable {
07
08     private static final long serialVersionUID = 0;
09
10     // 保存任务所需要的数据
11     private Object threadPoolTaskData;
12
13     private static int consumeTaskSleepTime = 2000;
14
15     public ThreadPoolTask(Object tasks) {
16         this.threadPoolTaskData = tasks;
17     }
18
19     public synchronized String call() throws Exception {
20         // 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
21         System.out.println("开始执行任务:" + threadPoolTaskData);
22         String result = "";
23         // //便于观察,等待一段时间
24         try {
25             // long r = 5/0;
26             for (int i = 0; i < 100000000; i++) {
27
28             }
29             result = "OK";
30         catch (Exception e) {
31             e.printStackTrace();
32             result = "ERROR";
33         }
34         threadPoolTaskData = null;
35         return result;
36     }
37 }

模拟客户端提交的线程

01 package com.zuidaima.threadpool;
02
03 import java.util.concurrent.ExecutionException;
04 import java.util.concurrent.FutureTask;
05 import java.util.concurrent.TimeUnit;
06
07 import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
08
09 public class StartTaskThread implements Runnable {
10
11     private ThreadPoolTaskExecutor threadPoolTaskExecutor;
12     private int i;
13
14     public StartTaskThread(ThreadPoolTaskExecutor threadPoolTaskExecutor, int i) {
15         this.threadPoolTaskExecutor = threadPoolTaskExecutor;
16         this.i = i;
17     }
18
19     @Override
20     public synchronized void run() {
21         String task = "task@ " + i;
22         System.out.println("创建任务并提交到线程池中:" + task);
23         FutureTask<String> futureTask = new FutureTask<String>(
24                 new ThreadPoolTask(task));
25         threadPoolTaskExecutor.execute(futureTask);
26         // 在这里可以做别的任何事情
27         String result = null;
28         try {
29             // 取得结果,同时设置超时执行时间为1秒。同样可以用future.get(),不设置执行超时时间取得结果
30             result = futureTask.get(1000, TimeUnit.MILLISECONDS);
31         catch (InterruptedException e) {
32             futureTask.cancel(true);
33         catch (ExecutionException e) {
34             futureTask.cancel(true);
35         catch (Exception e) {
36             futureTask.cancel(true);
37             // 超时后,进行相应处理
38         finally {
39             System.out.println("task@" + i + ":result=" + result);
40         }
41
42     }
43 }

SPRING配置文件

01 <?xml version="1.0" encoding="UTF-8"?>
02 <beans xmlns="http://www.springframework.org/schema/beans"
03     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
04     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
05     xsi:schemaLocation="
06         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
07         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
08         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
09         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
10         ">
11     <bean id="threadPoolTaskExecutor"
12         class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
13
14         <!-- 核心线程数,默认为1 -->
15         <property name="corePoolSize" value="10" />
16
17         <!-- 最大线程数,默认为Integer.MAX_VALUE -->
18         <property name="maxPoolSize" value="50" />
19
20         <!-- 队列最大长度,一般需要设置值>=notifyScheduledMainExecutor.maxNum;默认为Integer.MAX_VALUE
21             <property name="queueCapacity" value="1000" /> -->
22
23         <!-- 线程池维护线程所允许的空闲时间,默认为60s -->
24         <property name="keepAliveSeconds" value="300" />
25
26         <!-- 线程池对拒绝任务(无线程可用)的处理策略,目前只支持AbortPolicy、CallerRunsPolicy;默认为后者 -->
27         <property name="rejectedExecutionHandler">
28             <!-- AbortPolicy:直接抛出java.util.concurrent.RejectedExecutionException异常 -->
29             <!-- CallerRunsPolicy:主线程直接执行该任务,执行完之后尝试添加下一个任务到线程池中,可以有效降低向线程池内添加任务的速度 -->
30             <!-- DiscardOldestPolicy:抛弃旧的任务、暂不支持;会导致被丢弃的任务无法再次被执行 -->
31             <!-- DiscardPolicy:抛弃当前任务、暂不支持;会导致被丢弃的任务无法再次被执行 -->
32             <bean class="java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy" />
33         </property>
34     </bean>
35 </beans>

测试类

01 package com.zuidaima.test;
02
03 import org.junit.Test;
04 import org.junit.runner.RunWith;
05 import org.springframework.beans.factory.annotation.Autowired;
06 import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
07 import org.springframework.test.context.ContextConfiguration;
08 import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
09 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
10
11 import com.zuidaima.threadpool.StartTaskThread;
12
13 @RunWith(SpringJUnit4ClassRunner.class)
14 // 指定的运行runner,并且把你所指定的Runner作为参数传递给它
15 @ContextConfiguration(locations = "classpath*:applicationContext.xml")
16 public class TestThreadPool extends AbstractJUnit4SpringContextTests {
17
18     private static int produceTaskSleepTime = 10;
19
20     private static int produceTaskMaxNumber = 1000;
21
22     @Autowired
23     private ThreadPoolTaskExecutor threadPoolTaskExecutor;
24
25     public ThreadPoolTaskExecutor getThreadPoolTaskExecutor() {
26         return threadPoolTaskExecutor;
27     }
28
29     public void setThreadPoolTaskExecutor(
30             ThreadPoolTaskExecutor threadPoolTaskExecutor) {
31         this.threadPoolTaskExecutor = threadPoolTaskExecutor;
32     }
33
34     @Test
35     public void testThreadPoolExecutor() {
36         for (int i = 1; i <= produceTaskMaxNumber; i++) {
37             try {
38                 Thread.sleep(produceTaskSleepTime);
39             catch (InterruptedException e1) {
40                 e1.printStackTrace();
41             }
42             new Thread(new StartTaskThread(threadPoolTaskExecutor, i)).start();
43         }
44
45     }
46
47 }

原文中有些纰漏,我已经修改

项目截图(基于行家构建)

运行截图:

如果遇到CPU忙执行超过1秒的会返回空

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