Spring-Task

1、这是网上的: 后面是我自己的配置

Spring3.0以后自主开发的定时任务工具,spring task,可以将它比作一个轻量级的Quartz,而且使用起来很简单,除spring相关的包外不需要额外的包,而且支持注解和配置文件两种形式,下面将分别介绍这两种方式。

第一种:配置文件方式

第一步:编写作业类

即普通的pojo,如下:




import org.springframework.stereotype.Service;  
@Service
public class TaskJob {

public void job1() {
System.out.println(“任务进行中。。。”);
}
}


 


 第二步:在spring配置文件头中添加命名空间及描述




<beans xmlns="http://www.springframework.org/schema/beans"  
xmlns:task="http://www.springframework.org/schema/task"
。。。。。。
xsi:schemaLocation="http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">


 


 第三步:spring配置文件中设置具体的任务






<task:scheduled-tasks>   
<task:scheduled ref="taskJob" method="job1" cron="0 * * * * ?"/>
</task:scheduled-tasks>

<context:component-scan base-package=" com.gy.mytask " />


 


说明:ref参数指定的即任务类,method指定的即需要运行的方法,cron及cronExpression表达式,具体写法这里不介绍了,详情见上篇文章附录。

<context:component-scan base-package="com.gy.mytask" />这个配置不消多说了,spring扫描注解用的。

到这里配置就完成了,是不是很简单。

第二种:使用注解形式

也许我们不想每写一个任务类还要在xml文件中配置下,我们可以使用注解@Scheduled,我们看看源文件中该注解的定义:






@Target({java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.ANNOTATION_TYPE})  
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Scheduled
{
public abstract String cron();

public abstract long fixedDelay();

public abstract long fixedRate();
}


 


 可以看出该注解有三个方法或者叫参数,分别表示的意思是:

cron:指定cron表达式

fixedDelay:官方文档解释:An interval-based trigger where the interval is measured from the completion time of the previous task. The time unit value is measured in milliseconds.即表示从上一个任务完成开始到下一个任务开始的间隔,单位是毫秒。

fixedRate:官方文档解释:An interval-based trigger where the interval is measured from the start time of the previous task. The time unit value is measured in milliseconds.即从上一个任务开始到下一个任务开始的间隔,单位是毫秒。 

下面我来配置一下。

第一步:编写pojo






import org.springframework.scheduling.annotation.Scheduled;    
import org.springframework.stereotype.Component;

@Component(“taskJob”)
public class TaskJob {
@Scheduled(cron = "0 0 3 * * ?")
public void job1() {
System.out.println(“任务进行中。。。”);
}
}


 


 第二步:添加task相关的配置:






<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd"
default-lazy-init="false">


<context:annotation-config />
<!—spring扫描注解的配置 -->
<context:component-scan base-package="com.gy.mytask" />

<!—开启这个配置,spring才能识别@Scheduled注解 -->
<task:annotation-driven scheduler="qbScheduler" mode="proxy"/>
<task:scheduler id="qbScheduler" pool-size="10"/>


 


说明:理论上只需要加上<task:annotation-driven />这句配置就可以了,这些参数都不是必须的。 

 Ok配置完毕,当然spring task还有很多参数,我就不一一解释了,

具体参考xsd文档http://www.springframework.org/schema/task/spring-task-3.0.xsd。

2、这是我自己的配置,可以正常运行的

在springmvc-servlet.xml 中配置:



<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd"

>

<!-- Enables the Spring Task @Scheduled programming model -->
<task:executor id="executor" pool-size="5"/>
<task:scheduler id="scheduler" pool-size="10"/>
<task:annotation-driven executor="executor" scheduler="scheduler"/>

<context:annotation-config />



</beans>


在java中的配置:



/**
* com.zywang.spring.task.SpringTaskDemo.java
* @author ZYWANG 2011-3-9
*/
package com.linemessage.application.module.messageschedule;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;


/**
* Spring3 @Scheduled 演示
* @author ZYWANG 2011-3-9
*/
@Component
public class StartSchedule {

@Autowired
private TMessageScheduleDAO iMssageScheduleDao;

@Autowired
private TMessageDAO iMssageDao;
@Autowired
private PrdCataDAO prdCataDAO;


@Autowired
private TGroupDAO iGroupDAO;
@Autowired
private TGroupUserRelDAO iGroupUserRelDAO;

@Autowired
private TProductDAO iProductDao;

@Autowired
private UserSubDAO iUserSubDao;


@Autowired
private TMessageStatusDAO iMssageStatusDao;

@Autowired
private TMessageDurationDAO iMssageDurationDao;

@Autowired
private TLocationDescDAO iTLocationDescDAO;

@Autowired
private ClientUserDAO iClientUserDao;
@Autowired
private TPublisherDAO iTPublisherDAO;

@Autowired
private TGroupUserRelDAO tGroupUserRelDAO;


@Autowired
private PublisherProductRelDAO publisherProductRelDao;


@Autowired
private TSubscribeDAO tSubScribeDAO;


@Scheduled(cron = "0 0/15 * * * ?")//每15分钟运行一次
void messageSchdule() throws SQLException{
//System.out.println("I'm doing with cron now!");



Date end_time = new Date();
Date begin_time =new Date(end_time.getTime()-15*60*1000); //暂时设置为15分钟与cron对应
TMessageScheduleExample scheduleE = new TMessageScheduleExample();
scheduleE.createCriteria().andSendTimeBetween(begin_time,end_time).andIsvalidateEqualTo("1");

List<TMessageSchedule> schedules= iMssageScheduleDao.selectByExample(scheduleE);

for(TMessageSchedule tms:schedules)
{
//从数据库取出消息
TMessageExample messageE = new TMessageExample();
messageE.createCriteria().andIdEqualTo(tms.getId());

List<TMessage> messages= iMssageDao.selectByExampleWithBLOBs(messageE);
TMessage message=messages.get(0);

//取出接收人
TMessageStatusExample statusExample = new TMessageStatusExample();
statusExample.createCriteria().andMessageIdEqualTo(tms.getId());
List<TMessageStatus> statusList=iMssageStatusDao.selectByExample(statusExample);
//为所以接收人设置缓存

for(TMessageStatus status:statusList)
{
UserMessageCache.store(status.getDevicetoken(), "" + message.getId());
}

//存储APPLE 手机的PUSHTOKEN
List<String> applehash= new ArrayList<String>();

List<TMessageStatus> appleList=iMssageStatusDao.selectByExample4Apple(statusExample);

for (TMessageStatus status:appleList)
{

//如果是APPLE用户,则发送通知
applehash.add(status.getDevicetoken());
}


// 创建缓存,给终端用户使用,缓存对像
SendMessage.store(message.getId() + "", message);

//如果是苹果用户,发送通知
AppleSend sender= new AppleSendImpl(applehash,message.getTitle());
sender.send();


//做完之后,将t_mnessage_schedule的状态置为false

// message
TMessageSchedule messageSchedule = iMssageScheduleDao
.selectByPrimaryKey(message.getId());
messageSchedule.setIsvalidate("0");
iMssageScheduleDao.updateByPrimaryKeySelective(messageSchedule);

}







//==以下为清除过期Message
TMessageDurationExample TMDExample = new TMessageDurationExample();
TMDExample.createCriteria().andIsvalidateEqualTo("1").andEndTimeLessThan(new Date());
List<TMessageDuration> messageDList=iMssageDurationDao.selectByExample(TMDExample);
for(TMessageDuration tms:messageDList)
{

tms.setIsvalidate("0");
iMssageDurationDao.updateByPrimaryKeySelective(tms);


TMessageStatusExample statusExample = new TMessageStatusExample();
statusExample.createCriteria().andMessageIdEqualTo(tms.getMessageId()).andStatusNotEqualTo("0");
List<TMessageStatus> statusList=iMssageStatusDao.selectByExample(statusExample);
List<String>userIds=new ArrayList<String>();
for(TMessageStatus status:statusList)
{
userIds.add(status.getDevicetoken());

}
for (String deviceToken:userIds)
{
UserMessageCache.remove(deviceToken,String.valueOf(tms.getMessageId()));
}
SendMessage.remove(String.valueOf(tms.getMessageId()));

// message
}

}


 

 参考 S​​pring定时任务的几种实现​​: