spring框架使用任务调度quartz的例子-TriggerListener 篇

spring框架使用任务调度quartz的例子-TriggerListener 篇

        有时候我们的任务(Job)需要再某些任务完成之后才能进行;例如从旧的数据库批量导数据的时候;需要现将被其他数据依赖的数据导入新的数据库;然后再进行关系的导入.。在这种情况下我们就可以使用Quartz的listener来做文章了。
        首先我们写一个主任务的类,命名为MainJob;她的作用是作为一系列任务的开始点。
MainJob.java
package  jobs;

import  org.apache.log4j.Logger;
import  org.quartz.JobExecutionContext;
import  org.quartz.JobExecutionException;
import  org.springframework.scheduling.quartz.QuartzJobBean;

public   class  MainJob  extends  QuartzJobBean  {
    
private  Logger logger = Logger.getLogger(getClass());
    @Override
    
protected void executeInternal(JobExecutionContext arg0)
            
throws JobExecutionException {
        
// TODO Auto-generated method stub
        logger.debug("Just say hi.");
    }


}


        然后我们新建另外一个任务(SecondJob)作为后续任务:
SecondJob.java
package  jobs;

import  org.apache.log4j.Logger;
import  org.quartz.JobExecutionContext;
import  org.quartz.JobExecutionException;
import  org.springframework.scheduling.quartz.QuartzJobBean;

public   class  SecondJob  extends  QuartzJobBean  {
    
private  Logger logger = Logger.getLogger(getClass());
    @Override
    
protected void executeInternal(JobExecutionContext arg0)
            
throws JobExecutionException {
        
// TODO Auto-generated method stub
        logger.debug("I'm the second job.");
    }


}
        创建一个TriggerListener,重写其triggerComplete方法,并且添加一些方便spring注入的属性和方法。
NextJobTriggerListener.java
package  listeners;

import  org.apache.log4j.Logger;
import  org.quartz.JobDetail;
import  org.quartz.JobExecutionContext;
import  org.quartz.Scheduler;
import  org.quartz.Trigger;
import  org.quartz.listeners.TriggerListenerSupport;
import  org.springframework.scheduling.quartz.QuartzJobBean;
import  org.springframework.scheduling.quartz.SimpleTriggerBean;

public   class  NextJobTriggerListener  extends  TriggerListenerSupport  {
    
private  Logger logger = Logger.getLogger(getClass());
    
private String name;
    
public String getName() {
        
return this.name;
    }

    
public void setName(String name)
    
{
        
this.name=name;
    }

    
private SimpleTriggerBean nextTrigger;
    
public void setNextTrigger(SimpleTriggerBean nextTrigger) {
        
this.nextTrigger = nextTrigger;
    }

    @Override
    
public void triggerComplete(Trigger trigger, JobExecutionContext context, int code) {
        
try{
        Scheduler schduler
=context.getScheduler();
        JobDetail nextJob
=nextTrigger.getJobDetail();
        
//查找名称和即将加入的任务一样的任务
        JobDetail oldJob=schduler.getJobDetail(nextJob.getName(),nextJob.getGroup());
        
//查找名称和即将加入的触发器一样的触发器
        Trigger oldTrigger=schduler.getTrigger( nextTrigger.getName(),nextTrigger.getGroup());
        
        
if(oldJob==null&&oldTrigger==null)//同名的任务和触发器都不存在
        {
            logger.debug(
"inside scheduleJob."+code);
            schduler.scheduleJob(nextJob,nextTrigger);
        }
else//同名的任务或触发器
        {
            
            logger.debug(
"oldJob==null:"+(oldJob==null));
            logger.debug(
"oldTrigger==null:"+(oldTrigger==null));    
        }

        
super.triggerComplete(trigger, context, code);
        }
catch(Exception e)
        
{
            e.printStackTrace();
        }

    }

    

}


        配置spring 的applicationContext.xml
applicationContext.xml
<? 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:jee
="http://www.springframework.org/schema/jee"
    xsi:schemaLocation
="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.0.xsd"
>
   
<!--  主任务  -->
    
< bean  id ="mainJob"
        class
="org.springframework.scheduling.quartz.JobDetailBean" >
        
<!--  运行的类  -->
        
< property  name ="jobClass" >
            
< value > jobs.MainJob </ value >
        
</ property >
    
</ bean >
    
    
<!--  主任务的监听器  -->
    
< bean  id ="mainTriggerListener"
                class
="listeners.NextJobTriggerListener" >
                
<!--  下个触发器  -->
                
< property  name ="nextTrigger"  ref ="secondTrigger" ></ property >
                
<!--  监听器名称  -->
                
< property  name ="name"  value ="mainTriggerListener" ></ property >
    
</ bean >


    
<!--  主任务的触发器  -->
    
< bean  id ="mainTrigger"
        class
="org.springframework.scheduling.quartz.SimpleTriggerBean" >
        
< property  name ="jobDetail" >
            
<!--  上面创建的任务调度对象  -->
            
< ref  bean ="mainJob"   />
        
</ property >
        
<!--  启动60秒后执行任务调度的excute方法  -->
        
< property  name ="startDelay" >
            
< value > 6000 </ value >
        
</ property >
        
<!--  运行次数  -->
        
< property  name ="repeatCount" >
            
< value > 0 </ value >
        
</ property >
        
<!--  隔一个小时运行一次(貌似多余,不写会报错)  -->
        
< property  name ="repeatInterval" >
            
< value > 3600000 </ value >
        
</ property >
        
< property  name ="triggerListenerNames" >
            
< list >
                
< value > mainTriggerListener </ value >
            
</ list >
        
</ property >
    
</ bean >
    
    
<!--  后续任务  -->
    
< bean  id ="secondJob"
        class
="org.springframework.scheduling.quartz.JobDetailBean" >
        
<!--  运行的类  -->
        
< property  name ="jobClass" >
            
< value > jobs.SecondJob </ value >
        
</ property >
    
</ bean >

    
<!--  后续任务的触发器  -->
    
< bean  id ="secondTrigger"
        class
="org.springframework.scheduling.quartz.SimpleTriggerBean" >
        
< property  name ="jobDetail" >
            
<!--  上面创建的任务调度对象  -->
            
< ref  bean ="secondJob"   />
        
</ property >
        
<!--  启动6秒后执行任务调度的excute方法  -->
        
< property  name ="startDelay" >
            
< value > 6000 </ value >
        
</ property >
        
<!--  运行次数  -->
        
< property  name ="repeatCount" >
            
< value > 0 </ value >
        
</ property >
        
<!--  隔一个小时运行一次(貌似多余,不写会报错)  -->
        
< property  name ="repeatInterval" >
            
<!--  
            <value>3600000</value>
             
-->
             
< value > 6000 </ value >  
        
</ property >
    
</ bean >
    
    
<!--  任务调度工厂类  -->
    
< bean
        
class ="org.springframework.scheduling.quartz.SchedulerFactoryBean" >
        
<!--  这一部分的配置不用管  -->
        
< property  name ="quartzProperties" >
            
< props >
                
< prop  key ="org.quartz.threadPool.class" >
                    org.quartz.simpl.SimpleThreadPool
                
</ prop >
                
< prop  key ="org.quartz.threadPool.threadCount" > 10 </ prop >
                
< prop  key ="org.quartz.threadPool.threadPriority" >
                    5
                
</ prop >
                
< prop
                    
key ="org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread" >
                    true
                
</ prop >

            
</ props >
        
</ property >
        
<!--  触发器,可以放一大堆触发器  -->
        
< property  name ="triggers" >
            
< list >
                
<!--  在这里加  -->
                 
< ref  bean ="mainTrigger" />
            
</ list >
        
</ property >
        
< property  name ="triggerListeners" >
            
< list >
                
<!--  触发器的监听器  -->
                
< ref  bean ="mainTriggerListener" />
            
</ list >
        
</ property >
    
</ bean >
</ beans >
        开启服务器,输出
DEBUG  [ MainJob.executeInternal(14) ]   Just say hi.
DEBUG 
[ NextJobTriggerListener.triggerComplete(38) ]   inside scheduleJob .3
DEBUG [SecondJob.executeInternal(14)] I'm the second job.
DEBUG 
[ NextJobTriggerListener.triggerComplete(43) ]   oldJob == null:false
DEBUG 
[ NextJobTriggerListener.triggerComplete(44) ]   oldTrigger == null:false

        另外这里一个任务只绑定了一个简单的触发器,这样做是为了比较方便地可以检测到任务完成的情况;至于任务的具体内容就任由大家发挥了。写这篇文章希望能有人在其中获得启发。

Let life be beautiful like summer flowers and death like autumn leaves.

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