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

程序员文章站 2024-02-13 10:00:04

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...

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&characterencoding=utf-8&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;
@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<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();
 }
 }
}

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