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Spring線程池ThreadPoolExecutor配置并且得到任務(wù)執(zhí)行的結(jié)果

更新時(shí)間：2019年03月12日 10:36:10 作者：paulwong

今天小編就為大家分享一篇關(guān)于Spring線程池ThreadPoolExecutor配置并且得到任務(wù)執(zhí)行的結(jié)果，小編覺(jué)得內(nèi)容挺不錯(cuò)的，現(xiàn)在分享給大家，具有很好的參考價(jià)值，需要的朋友一起跟隨小編來(lái)看看吧

用ThreadPoolExecutor的時(shí)候，又想知道被執(zhí)行的任務(wù)的執(zhí)行情況，這時(shí)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;
  // 保存任務(wù)所需要的數(shù)據(jù)
  private Object threadPoolTaskData;
  private static int consumeTaskSleepTime = 2000;
  public ThreadPoolTask(Object tasks) {
    this.threadPoolTaskData = tasks;
  }
  public synchronized String call() throws Exception {
    // 處理一個(gè)任務(wù)，這里的處理方式太簡(jiǎn)單了，僅僅是一個(gè)打印語(yǔ)句
    System.out.println("開(kāi)始執(zhí)行任務(wù)：" + threadPoolTaskData);
    String result = "";
    // //便于觀察，等待一段時(shí)間
    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;
  }
}

模擬客戶端提交的線程

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("創(chuàng)建任務(wù)并提交到線程池中：" + task);
 FutureTask<String> futureTask = new FutureTask<String>(
 new ThreadPoolTask(task));
 threadPoolTaskExecutor.execute(futureTask);
 // 在這里可以做別的任何事情
 String result = null;
 try {
 // 取得結(jié)果，同時(shí)設(shè)置超時(shí)執(zhí)行時(shí)間為0.1秒。同樣可以用future.get()，不設(shè)置執(zhí)行超時(shí)時(shí)間取得結(jié)果
 result = futureTask.get();
 } catch (InterruptedException e) {
 futureTask.cancel(true);
 } catch (ExecutionException e) {
 futureTask.cancel(true);
 } catch (Exception e) {
 futureTask.cancel(true);
 // 超時(shí)后，進(jìn)行相應(yīng)處理
 } 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">
 <!-- 配置數(shù)據(jù)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" />
 <!-- 事務(wù)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命名空間配置事務(wù)管理,這里對(duì)service包下的服務(wù)類方法提供事務(wù) -->
 <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">
 <!-- 核心線程數(shù)，默認(rèn)為1 -->
 <property name="corePoolSize" value="10" />
 <!-- 最大線程數(shù)，默認(rèn)為Integer.MAX_VALUE -->
 <property name="maxPoolSize" value="50" />
 <!-- 隊(duì)列最大長(zhǎng)度，一般需要設(shè)置值>=notifyScheduledMainExecutor.maxNum；默認(rèn)為Integer.MAX_VALUE 
 <property name="queueCapacity" value="1000" />
 -->
 <!-- 線程池維護(hù)線程所允許的空閑時(shí)間，默認(rèn)為60s -->
 <property name="keepAliveSeconds" value="300" />
 <!-- 線程池對(duì)拒絕任務(wù)（無(wú)線程可用）的處理策略，目前只支持AbortPolicy、CallerRunsPolicy；默認(rèn)為后者 -->
 <property name="rejectedExecutionHandler">
 <!-- AbortPolicy:直接拋出java.util.concurrent.RejectedExecutionException異常 -->
 <!-- CallerRunsPolicy:主線程直接執(zhí)行該任務(wù)，執(zhí)行完之后嘗試添加下一個(gè)任務(wù)到線程池中，可以有效降低向線程池內(nèi)添加任務(wù)的速度 -->
 <!-- DiscardOldestPolicy:拋棄舊的任務(wù)、暫不支持；會(huì)導(dǎo)致被丟棄的任務(wù)無(wú)法再次被執(zhí)行 -->
 <!-- DiscardPolicy:拋棄當(dāng)前任務(wù)、暫不支持；會(huì)導(dǎo)致被丟棄的任務(wù)無(wú)法再次被執(zhí)行 -->
 <bean class="java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy" />
 </property>
 </bean>
</beans>

測(cè)試類

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()
 {
 // 構(gòu)造一個(gè)線程池
 final ThreadPoolExecutor threadPool = new ThreadPoolExecutor(2, 4, 600,
 TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(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();
 }
 }
}

項(xiàng)目截圖(基于maven構(gòu)建)