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。

ThreadPoolTask

package  com.paul.threadPool;

import  java.io.Serializable;
import  java.util.concurrent.Callable;

public   class  ThreadPoolTask  implements  Callable < String > , 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<String> futureTask = new FutureTask<String>(
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" ?>
< beans xmlns ="http://www.springframework.org/schema/beans"
xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p ="http://www.springframework.org/schema/p"
xmlns:aop ="http://www.springframework.org/schema/aop"
xmlns:tx ="http://www.springframework.org/schema/tx"
xsi:schemaLocation ="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd" >



<!-- 配置数据源 -->
< bean id ="dataSource" class ="org.apache.commons.dbcp.BasicDataSource"
destroy-method ="close" p:driverClassName ="com.mysql.jdbc.Driver"
p:url ="jdbc:mysql://localhost:3306/mb_main?useUnicode=true&amp;characterEncoding=UTF-8&amp;useServerPrepStmts=true" p:username ="root" p:password ="1234" />

<!-- 配置Jdbc模板 -->
< bean id ="jdbcTemplate" class ="org.springframework.jdbc.core.JdbcTemplate"
p:dataSource-ref ="dataSource" />

<!-- 事务管理器 -->
< bean id ="transactionManager"
class ="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref ="dataSource" />

< tx:advice id ="jdbcTxAdvice" transaction-manager ="transactionManager" >
< tx:attributes >
< tx:method name ="*" />
</ tx:attributes >
</ tx:advice >

<!-- 使用aop/tx命名空间配置事务管理,这里对service包下的服务类方法提供事务 -->
< aop:config >
< aop:pointcut id ="jdbcServiceMethod" expression ="within(com.baobaotao.service..*)" />
< aop:advisor pointcut-ref ="jdbcServiceMethod" advice-ref ="jdbcTxAdvice" />
</ aop:config >

<!-- 配置dao
<bean id="loginLogDao" class="com.baobaotao.dao.LoginLogDao"
p:jdbcTemplate-ref="jdbcTemplate" />
<bean id="userDao" class="com.baobaotao.dao.UserDao"
p:jdbcTemplate-ref="jdbcTemplate" />


<bean id="userService" class="com.baobaotao.service.UserService"
p:userDao-ref="userDao" p:loginLogDao-ref="loginLogDao" />
-->

< bean id ="threadPoolTaskExecutor" class ="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor" >

<!-- 核心线程数，默认为1 -->
< property name ="corePoolSize" value ="10" />

<!-- 最大线程数，默认为Integer.MAX_VALUE -->
< property name ="maxPoolSize" value ="50" />

<!-- 队列最大长度，一般需要设置值>=notifyScheduledMainExecutor.maxNum；默认为Integer.MAX_VALUE
<property name="queueCapacity" value="1000" />
-->

<!-- 线程池维护线程所允许的空闲时间，默认为60s -->
< property name ="keepAliveSeconds" value ="300" />

<!-- 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 -->
< property name ="rejectedExecutionHandler" >
<!-- AbortPolicy:直接抛出java.util.concurrent.RejectedExecutionException异常 -->
<!-- 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 -->
<!-- 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 -->
<!-- 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 -->
< bean class ="java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy" />
</ property >

</ bean >


</ beans >

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;

   @RunWith(SpringJUnit4ClassRunner.class)
    // 指定的运行runner，并且把你所指定的Runner作为参数传递给它
@ContextConfiguration(locations = "classpath*:applicationContext.xml")
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()
{
for (int i = 1; i <= produceTaskMaxNumber; i++) {
try {
Thread.sleep(produceTaskSleepTime);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
new Thread(new StartTaskThread(threadPoolTaskExecutor,i)).start();
}

}

}