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spring4.0 整合 Quartz 实现动态任务调度(2)

    博客分类:
  • Java
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 项目需求:

     http://www.cnblogs.com/Alandre/p/3733249.html

     上一博客写的是基本调度,后来这只能用于,像每天定个时间 进行数据库备份。但是,远远不能在上次的需求上实现。所以需要实现spring4.0 整合 Quartz 实现动态任务调度。

 

正文 

  spring4.0 整合 Quartz 实现任务调度。这真是期末项目的最后一篇,剩下到暑假吧。

    Quartz 介绍

    Quartz is a full-featured, open source job scheduling service that can be integrated with, or used along side virtually any Java application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing tens, hundreds, or even tens-of-thousands of jobs; 
    Quartz框架是一个全功能、开源的任务调度服务,可以集成几乎任何的java应用程序—从小的单片机系统到大型的电子商务系统。Quartz可以执行上千上万的任务调度。
 
   核心概念
     Quartz核心的概念:scheduler任务调度、Job任务、Trigger触发器、JobDetail任务细节

回顾

  上次我们配置了

复制代码
<!--Quartz-->
            
    <!-- 集成方式:JobDetailFactoryBean,并且任务类需要继承QuartzJobBean-->
    <!-- 定义jobDetail -->
    <bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailFactoryBean">
        <!-- durability 表示任务完成之后是否依然保留到数据库,默认false   -->
        <property name="durability" value="true" />  
        <!--     目标类  /wmuitp/src/test/SpringQuartz.java-->
        <property name="jobClass" value="test.SpringQuartzTest"></property>
        
           <!--  在这个例子中,jobDataAsMap没有用,此目标类中接受的参数 ,若参数为service,则可以在此进行参数配置,类似struts2 -->
           <!--
        <property name="jobDataAsMap">  
            <map>  
                <entry key="service"><value>simple is the beat</value></entry>  
            </map>  
        </property>
            -->
    </bean>
    
    <!-- 定义simpleTrigger触发器 -->
    <!--     
    <bean id="simpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">
        <property name="jobDetail" ref="jobDetail"></property>
        <property name="repeatCount">
            <value>8</value>
        </property>
        <property name="repeatInterval">
            <value>1000</value>
        </property>
        <property name="startDelay">
            <value>4</value>
        </property>
    </bean> 
    -->
    
    <!-- 另一种触发器是CornTrigger -->
     <bean id="cornTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
       <property name="jobDetail" ref="jobDetail"/>
       <!-- 每个10秒触发 -->
       <property name="cronExpression" value="0/10 * * * * ?"/>
    </bean> 
    
    <!-- 定义核心调度器 -->
    <bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
      <property name="triggers">
        <ref bean="cornTrigger"/>
      </property>
    </bean>
复制代码

  #spring实现quartz的方式,先看一下上面配置文件中定义的jobDetail。在Quartz 2.x版本中JobDetail已经是一个接口,Spring是通过将其转换为MethodInvokingJob或StatefulMethodInvokingJob类型来实现的。

 

  这是文档中的源码:

复制代码
/**
 * This implementation applies the passed-in job data map as bean property
 * values, and delegates to <code>executeInternal</code> afterwards.
 * @see #executeInternal
 */
public final void execute(JobExecutionContext context) throws JobExecutionException {
    try {
        // Reflectively adapting to differences between Quartz 1.x and Quartz 2.0...
        Scheduler scheduler = (Scheduler) ReflectionUtils.invokeMethod(getSchedulerMethod, context);
        Map mergedJobDataMap = (Map) ReflectionUtils.invokeMethod(getMergedJobDataMapMethod, context);
 
        BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
        MutablePropertyValues pvs = new MutablePropertyValues();
        pvs.addPropertyValues(scheduler.getContext());
        pvs.addPropertyValues(mergedJobDataMap);
        bw.setPropertyValues(pvs, true);
    }
    catch (SchedulerException ex) {
        throw new JobExecutionException(ex);
    }
    executeInternal(context);
}
 
/**
 * Execute the actual job. The job data map will already have been
 * applied as bean property values by execute. The contract is
 * exactly the same as for the standard Quartz execute method.
 * @see #execute
 */
protected abstract void executeInternal(JobExecutionContext context) throws JobExecutionException;
复制代码

 

  MethodInvokingJobDetailFactoryBean中的源码:

复制代码
public void afterPropertiesSet() throws ClassNotFoundException, NoSuchMethodException {
    prepare();
 
    // Use specific name if given, else fall back to bean name.
    String name = (this.name != null ? this.name : this.beanName);
 
    // Consider the concurrent flag to choose between stateful and stateless job.
    Class jobClass = (this.concurrent ? MethodInvokingJob.class : StatefulMethodInvokingJob.class);
 
    // Build JobDetail instance.
    if (jobDetailImplClass != null) {
        // Using Quartz 2.0 JobDetailImpl class...
        this.jobDetail = (JobDetail) BeanUtils.instantiate(jobDetailImplClass);
        BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this.jobDetail);
        bw.setPropertyValue("name", name);
        bw.setPropertyValue("group", this.group);
        bw.setPropertyValue("jobClass", jobClass);
        bw.setPropertyValue("durability", true);
        ((JobDataMap) bw.getPropertyValue("jobDataMap")).put("methodInvoker", this);
    }
    else {
        // Using Quartz 1.x JobDetail class...
        this.jobDetail = new JobDetail(name, this.group, jobClass);
        this.jobDetail.setVolatility(true);
        this.jobDetail.setDurability(true);
        this.jobDetail.getJobDataMap().put("methodInvoker", this);
    }
 
    // Register job listener names.
    if (this.jobListenerNames != null) {
        for (String jobListenerName : this.jobListenerNames) {
            if (jobDetailImplClass != null) {
                throw new IllegalStateException("Non-global JobListeners not supported on Quartz 2 - " +
                        "manually register a Matcher against the Quartz ListenerManager instead");
            }
            this.jobDetail.addJobListener(jobListenerName);
        }
    }
 
    postProcessJobDetail(this.jobDetail);
}
复制代码

 

  #既然知道了其所以然,我们就可以真正实战了。

实战 

  听我慢慢道来

减少spring的配置文件

  为了实现一个定时任务,spring的配置代码太多了。动态配置需要们手动来搞。这里我们只需要这要配置即可:

    <!-- quartz配置  动态配置所以我们将 Factory 作为一个service一样的接口 QuartzJobFactory.java-->
    <!-- 调度工厂 -->
    <bean id="schedulerFactoryBean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
    </bean>

 

Job实现类

  在这里我把它看作工厂类:

复制代码
package test;

import org.quartz.DisallowConcurrentExecution;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

@DisallowConcurrentExecution
public class QuartzJobFactoryImpl implements Job 
{

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException
    {
        System.out.println("任务成功运行");
        ScheduleJob scheduleJob = (ScheduleJob)context.getMergedJobDataMap().get("scheduleJob");
        System.out.println("任务名称 = [" + scheduleJob.getJobName() + "]");
    }
}
复制代码

 

任务对应实体类

复制代码
package test;

public class ScheduleJob
{
     /** 任务id **/
    private String jobId;
 
    /** 任务名称 **/
    private String jobName;
 
    /** 任务分组 **/
    private String jobGroup;
 
    /** 任务状态 0禁用 1启用 2删除**/
    private String jobStatus;
 
    /** 任务运行时间表达式 **/
    private String cronExpression;
 
    /** 任务描述 **/
    private String desc;

    public String getJobId()
    {
        return jobId;
    }

    public void setJobId(String jobId)
    {
        this.jobId = jobId;
    }

    public String getJobName()
    {
        return jobName;
    }

    public void setJobName(String jobName)
    {
        this.jobName = jobName;
    }

    public String getJobGroup()
    {
        return jobGroup;
    }

    public void setJobGroup(String jobGroup)
    {
        this.jobGroup = jobGroup;
    }

    public String getJobStatus()
    {
        return jobStatus;
    }

    public void setJobStatus(String jobStatus)
    {
        this.jobStatus = jobStatus;
    }

    public String getCronExpression()
    {
        return cronExpression;
    }

    public void setCronExpression(String cronExpression)
    {
        this.cronExpression = cronExpression;
    }

    public String getDesc()
    {
        return desc;
    }

    public void setDesc(String desc)
    {
        this.desc = desc;
    }
    
    
}
复制代码

 

 

下面我们就来测试下:

Controller 测试代码:

复制代码
  @RequestMapping(value = "/quartz")
    public ModelAndView quartz() throws SchedulerException 
    {    
        
        //schedulerFactoryBean 由spring创建注入
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");  
        System.out.println(ctx);
        Scheduler scheduler = (Scheduler)ctx.getBean("schedulerFactoryBean");
        
        System.out.println(scheduler);
        //这里获取任务信息数据
        List<ScheduleJob> jobList = new ArrayList<ScheduleJob>();
        
        for (int i = 0; i < 3; i++) {
            ScheduleJob job = new ScheduleJob();
            job.setJobId("10001" + i);
            job.setJobName("JobName_" + i);
            job.setJobGroup("dataWork");
            job.setJobStatus("1");
            job.setCronExpression("0/5 * * * * ?");
            job.setDesc("数据导入任务");
            jobList.add(job);
        }

        for (ScheduleJob job : jobList) {
         
            TriggerKey triggerKey = TriggerKey.triggerKey(job.getJobName(), job.getJobGroup());
         
            //获取trigger,即在spring配置文件中定义的 bean id="myTrigger"
            CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);

            //不存在,创建一个
            if (null == trigger) {
                JobDetail jobDetail = JobBuilder.newJob(QuartzJobFactoryImpl.class)
                    .withIdentity(job.getJobName(), job.getJobGroup()).build();
                jobDetail.getJobDataMap().put("scheduleJob", job);
         
                //表达式调度构建器
                CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job
                    .getCronExpression());
         
                //按新的cronExpression表达式构建一个新的trigger
                trigger = TriggerBuilder.newTrigger().withIdentity(job.getJobName(), job.getJobGroup()).withSchedule(scheduleBuilder).build();
                scheduler.scheduleJob(jobDetail, trigger);
            } else {
                // Trigger已存在,那么更新相应的定时设置
                //表达式调度构建器
                CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job
                    .getCronExpression());
         
                //按新的cronExpression表达式重新构建trigger
                trigger = trigger.getTriggerBuilder().withIdentity(triggerKey)
                    .withSchedule(scheduleBuilder).build();
         
                //按新的trigger重新设置job执行
                scheduler.rescheduleJob(triggerKey, trigger);
            }
        }
        
        ModelAndView mav = new ModelAndView(AdminWebConstant.ADMIN_LOGIN_VIEW);
        return mav;
    }
复制代码

 

 #后面这块应该会进一步整理。到时候 会出个更详细的。期待吧

 

测试结果:

总结

  spring quartz

  

感谢及资源共享

    

http://www.cnblogs.com/Alandre/p/3735072.html

 
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