spring线程池ThreadPoolExecutor配置并且得到任务执行的结果-阿里云开发者社区

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

 
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       package com.zuidaima.threadpool;  
     
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       import java.io.Serializable;  
     
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       import java.util.concurrent.Callable;  
     
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       public class ThreadPoolTask implements Callable<String>, Serializable {  
     
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           private static final long serialVersionUID = 0;  
     
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           // 保存任务所需要的数据  
     
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           private Object threadPoolTaskData;  
     
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           private static int consumeTaskSleepTime = 2000;  
     
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           public ThreadPoolTask(Object tasks) {  
     
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               this.threadPoolTaskData = tasks;  
     
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           }  
     
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           public synchronized String call() throws Exception {  
     
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               // 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  
     
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               System.out.println("开始执行任务：" + threadPoolTaskData);  
     
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               String result = "";  
     
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               // //便于观察，等待一段时间  
     
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               try {  
     
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                   // long r = 5/0;  
     
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                   for (int i = 0; i < 100000000; i++) {  
     
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                   }  
     
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                   result = "OK";  
     
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               } catch (Exception e) {  
     
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                   e.printStackTrace();  
     
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                   result = "ERROR";  
     
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               }  
     
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               threadPoolTaskData = null;  
     
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               return result;  
     
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           }  
     
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      }

模拟客户端提交的线程

 
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       package com.zuidaima.threadpool;  
     
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       import java.util.concurrent.ExecutionException;  
     
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       import java.util.concurrent.FutureTask;  
     
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       import java.util.concurrent.TimeUnit;  
     
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       import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;  
     
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       public class StartTaskThread implements Runnable {  
     
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           private ThreadPoolTaskExecutor threadPoolTaskExecutor;  
     
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           private int i;  
     
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           public StartTaskThread(ThreadPoolTaskExecutor threadPoolTaskExecutor, int i) {  
     
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               this.threadPoolTaskExecutor = threadPoolTaskExecutor;  
     
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               this.i = i;  
     
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           }  
     
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           @Override  
     
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           public synchronized void run() {  
     
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               String task = "task@ " + i;  
     
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               System.out.println("创建任务并提交到线程池中：" + task);  
     
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               FutureTask<String> futureTask = new FutureTask<String>(  
     
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                       new ThreadPoolTask(task));  
     
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               threadPoolTaskExecutor.execute(futureTask);  
     
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               // 在这里可以做别的任何事情  
     
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               String result = null;  
     
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               try {  
     
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                   // 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  
     
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                   result = futureTask.get(1000, TimeUnit.MILLISECONDS);  
     
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               } catch (InterruptedException e) {  
     
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                   futureTask.cancel(true);  
     
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               } catch (ExecutionException e) {  
     
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                   futureTask.cancel(true);  
     
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               } catch (Exception e) {  
     
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                   futureTask.cancel(true);  
     
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                   // 超时后，进行相应处理  
     
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               } finally {  
     
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                   System.out.println("task@" + i + ":result=" + result);  
     
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               }  
     
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           }  
     
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      }

SPRING配置文件

 
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       <?xml version="1.0" encoding="UTF-8"?>  
     
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       <beans xmlns="http://www.springframework.org/schema/beans"  
     
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           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"  
     
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           xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"  
     
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           xsi:schemaLocation="  
     
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               http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
     
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               http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd  
     
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               http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd  
     
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               http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd  
     
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               ">  
     
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           <bean id="threadPoolTaskExecutor"  
     
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               class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">  
     
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               <!-- 核心线程数，默认为1 -->  
     
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               <property name="corePoolSize" value="10" />  
     
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               <!-- 最大线程数，默认为Integer.MAX_VALUE -->  
     
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               <property name="maxPoolSize" value="50" />  
     
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               <!-- 队列最大长度，一般需要设置值>=notifyScheduledMainExecutor.maxNum；默认为Integer.MAX_VALUE  
     
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                   <property name="queueCapacity" value="1000" /> -->  
     
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               <!-- 线程池维护线程所允许的空闲时间，默认为60s -->  
     
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               <property name="keepAliveSeconds" value="300" />  
     
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               <!-- 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 -->  
     
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               <property name="rejectedExecutionHandler">  
     
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                   <!-- AbortPolicy:直接抛出java.util.concurrent.RejectedExecutionException异常 -->  
     
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                   <!-- 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 -->  
     
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                   <!-- 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 -->  
     
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                   <!-- 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 -->  
     
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                   <bean class="java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy" />  
     
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               </property>  
     
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           </bean>  
     
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      </beans>

测试类

 
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       package com.zuidaima.test;  
     
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       import org.junit.Test;  
     
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       import org.junit.runner.RunWith;  
     
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       import org.springframework.beans.factory.annotation.Autowired;  
     
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       import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;  
     
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       import org.springframework.test.context.ContextConfiguration;  
     
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       import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;  
     
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       import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  
     
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       import com.zuidaima.threadpool.StartTaskThread;  
     
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       @RunWith(SpringJUnit4ClassRunner.class)  
     
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      // 指定的运行runner，并且把你所指定的Runner作为参数传递给它 
     
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       @ContextConfiguration(locations = "classpath*:applicationContext.xml")  
     
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       public class TestThreadPool extends AbstractJUnit4SpringContextTests {  
     
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           private static int produceTaskSleepTime = 10;  
     
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           private static int produceTaskMaxNumber = 1000;  
     
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           @Autowired  
     
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           private ThreadPoolTaskExecutor threadPoolTaskExecutor;  
     
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           public ThreadPoolTaskExecutor getThreadPoolTaskExecutor() {  
     
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               return threadPoolTaskExecutor;  
     
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           }  
     
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           public void setThreadPoolTaskExecutor(  
     
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                   ThreadPoolTaskExecutor threadPoolTaskExecutor) {  
     
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               this.threadPoolTaskExecutor = threadPoolTaskExecutor;  
     
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           }  
     
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           @Test  
     
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           public void testThreadPoolExecutor() {  
     
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               for (int i = 1; i <= produceTaskMaxNumber; i++) {  
     
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                   try {  
     
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                       Thread.sleep(produceTaskSleepTime);  
     
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                   } catch (InterruptedException e1) {  
     
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                       e1.printStackTrace();  
     
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                   }  
     
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                   new Thread(new StartTaskThread(threadPoolTaskExecutor, i)).start();  
     
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               }  
     
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           }  
     
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      }