项目ITP(六) spring4.0 整合 Quartz 实现动态任务调度

前言

　　系列文章：[传送门]

　　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

　　　　 相关文档：http://www.quartz-scheduler.org/documentation/quartz-2.2.x/quick-start

回顾

　　上次我们配置了

<!--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>

　　#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：

/**
 * 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;

　 MethodInvokingJobDetailFactoryBean中的源码：

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);
}

　　#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:

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() + "]");
    }
}

任务对应实体类

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;
    }

}

下面我们就来测试下：

Controller 测试代码：

　　@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;
    }

#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

　　

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　　　　知识来源：　《spring in action》 quartz api