前言

　　系列文章：[傳送門]

　　項目需求：

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

　　　　　上一博客寫的是基本調度，后來這只能用於，像每天定個時間 進行數據庫備份。但是，遠遠不能在上次的需求上實現。所以需要實現spring4.0 整合 Quartz 實現動態任務調度。

 

正文 

　　spring4.0 整合 Quartz 實現任務調度。這真是期末項目的最后一篇，剩下到暑假吧。

 　  Quartz 介紹

 　　　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框架是一個全功能、開源的任務調度服務，可以集成幾乎任何的java應用程序—從小的單片機系統到大型的電子商務系統。Quartz可以執行上千上萬的任務調度。

 

 　　 核心概念

 　　　　Quartz核心的概念：scheduler任務調度、Job任務、Trigger觸發器、JobDetail任務細節

　　　　 相關文檔： http://www.quartz-scheduler.org/documentation/quartz-2.2.x/quick-start

回顧

　　上次我們配置了

<!--Quartz-->
            
    <!-- 集成方式：JobDetailFactoryBean，並且任務類需要繼承QuartzJobBean-->
    <!-- 定義jobDetail -->
    <bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailFactoryBean">
        <!-- durability 表示任務完成之后是否依然保留到數據庫，默認false   -->
        <property name="durability" value="true" />  
        <!--     目標類  /wmuitp/src/test/SpringQuartz.java-->
        <property name="jobClass" value="test.SpringQuartzTest"></property>
        
           <!--  在這個例子中，jobDataAsMap沒有用，此目標類中接受的參數 ,若參數為service，則可以在此進行參數配置，類似struts2 -->
           <!--
        <property name="jobDataAsMap">  
            <map>  
                <entry key="service"><value>simple is the beat</value></entry>  
            </map>  
        </property>
            -->
    </bean>
    
    <!-- 定義simpleTrigger觸發器 -->
    <!--     
    <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> 
    -->
    
    <!-- 另一種觸發器是CornTrigger -->
     <bean id="cornTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
       <property name="jobDetail" ref="jobDetail"/>
       <!-- 每個10秒觸發 -->
       <property name="cronExpression" value="0/10 * * * * ?"/>
    </bean> 
    
    <!-- 定義核心調度器 -->
    <bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
      <property name="triggers">
        <ref bean="cornTrigger"/>
      </property>
    </bean>

　　#spring實現quartz的方式，先看一下上面配置文件中定義的jobDetail。在Quartz 2.x版本中JobDetail已經是一個接口，Spring是通過將其轉換為MethodInvokingJob或StatefulMethodInvokingJob類型來實現的。

 

　　這是文檔中的源碼：

/**
 * 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中的源碼：

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，我們就可以真正實戰了。

實戰 

　　聽我慢慢道來

減少spring的配置文件

　　為了實現一個定時任務，spring的配置代碼太多了。動態配置需要們手動來搞。這里我們只需要這要配置即可:

    <!-- quartz配置  動態配置所以我們將 Factory 作為一個service一樣的接口 QuartzJobFactory.java-->
    <!-- 調度工廠 -->
    <bean id="schedulerFactoryBean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
    </bean>

 

Job實現類

　　在這里我把它看作工廠類:

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("任務成功運行");
        ScheduleJob scheduleJob = (ScheduleJob)context.getMergedJobDataMap().get("scheduleJob");
        System.out.println("任務名稱 = [" + scheduleJob.getJobName() + "]");
    }

}

 

任務對應實體類

package test;

public class ScheduleJob
{
     /** 任務id **/
    private String jobId;
 
    /** 任務名稱 **/
    private String jobName;
 
    /** 任務分組 **/
    private String jobGroup;
 
    /** 任務狀態 0禁用 1啟用 2刪除**/
    private String jobStatus;
 
    /** 任務運行時間表達式 **/
    private String cronExpression;
 
    /** 任務描述 **/
    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;
    }
    
    
}

 

 

下面我們就來測試下：

Controller 測試代碼：

　　@RequestMapping(value = "/quartz")
    public ModelAndView quartz() throws SchedulerException 
    {    
        
        //schedulerFactoryBean 由spring創建注入
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");  
        System.out.println(ctx);
        Scheduler scheduler = (Scheduler)ctx.getBean("schedulerFactoryBean");
        
        System.out.println(scheduler);
        //這里獲取任務信息數據
        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("數據導入任務");
            jobList.add(job);
        }

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

            //不存在，創建一個
            if (null == trigger) {
                JobDetail jobDetail = JobBuilder.newJob(QuartzJobFactoryImpl.class)
                    .withIdentity(job.getJobName(), job.getJobGroup()).build();
                jobDetail.getJobDataMap().put("scheduleJob", job);
         
                //表達式調度構建器
                CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job
                    .getCronExpression());
         
                //按新的cronExpression表達式構建一個新的trigger
                trigger = TriggerBuilder.newTrigger().withIdentity(job.getJobName(), job.getJobGroup()).withSchedule(scheduleBuilder).build();
                scheduler.scheduleJob(jobDetail, trigger);
            } else {
                // Trigger已存在，那么更新相應的定時設置
                //表達式調度構建器
                CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job
                    .getCronExpression());
         
                //按新的cronExpression表達式重新構建trigger
                trigger = trigger.getTriggerBuilder().withIdentity(triggerKey)
                    .withSchedule(scheduleBuilder).build();
         
                //按新的trigger重新設置job執行
                scheduler.rescheduleJob(triggerKey, trigger);
            }
        }
        
        ModelAndView mav = new ModelAndView(AdminWebConstant.ADMIN_LOGIN_VIEW);
        return mav;
    }

 

 #后面這塊應該會進一步整理。到時候 會出個更詳細的。期待吧

 

測試結果：

總結

　　spring quartz

　　

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　　　　知識來源：　《spring in action》 quartz api