项目ITP(七) javaWeb 整合 Quartz 实现动态调度而且持久化

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Written In The Font

须要:WEB-INF/lib/quartz-2.2.1.jar

基本步骤:

web.xml注冊监听器ScheduleStartListener

注冊quartz监听器,监听项目是否启动或者重新启动.保证项目启动或重新启动时,全部任务会被又一次安排到任务调度中.

web.xml增加一个Listener:

<!-- quartz监听器 -->

<listener>

    <listener-class>sedion.jeffli.wmuitp.listener.ScheduleStartListener</listener-class>

</listener>

监听器类sedion.jeffli.wmuitp.listener.ScheduleStartListener实现

监听器类主要是实现recovery各个任务,又一次恢复在triggerGroups组中全部的触发器,按新的trigger又一次设置job运行.顺便说下,这个异常自己定义(不须要删除就可以): sedion.jeffli.wmuitp.exception.QuartzException;

package sedion.jeffli.wmuitp.listener;

import java.util.List;

import javax.servlet.ServletContextEvent;

import javax.servlet.ServletContextListener;

import org.quartz.Scheduler;

import org.quartz.SchedulerFactory;

import org.quartz.Trigger;

import org.quartz.TriggerKey;

import org.quartz.impl.StdSchedulerFactory;

import sedion.jeffli.wmuitp.exception.QuartzException;

public class ScheduleStartListener implements ServletContextListener

{

    public void contextDestroyed(ServletContextEvent sce)

    {

    }

    public void contextInitialized(ServletContextEvent sce)

    {

        try

        {

            recovery();

        }

        catch (Exception e)

        {

            throw new QuartzException(" ScheduleStartListener contextInitialized ERROR!!",e);

        }

    }

    public void recovery()

    {

        Scheduler scheduler = null;

        try {

            SchedulerFactory schedulerFactory = new StdSchedulerFactory();

            scheduler = schedulerFactory.getScheduler();//能够通过SchedulerFactory创建一个Scheduler实例

            List<String> triggerGroups = scheduler.getTriggerGroupNames();//获取调度器中全部的触发器组

            System.out.println("调度器中全部的触发器组 size():"+triggerGroups.size());

            if(triggerGroups != null && triggerGroups.size() != 0)//又一次恢复在triggerGroups组中全部的触发器

            {

                for (int i = 0; i < triggerGroups.size(); i++)

                {

                        TriggerKey triggerKey = TriggerKey.triggerKey(triggerGroups.get(i), triggerGroups.get(i));

                        System.out.println("triggerKey:"+triggerKey);

                        Trigger tg = scheduler.getTrigger(triggerKey);//获取trigger

                        System.out.println(triggerKey+" -> 运行时间 :"+tg.getNextFireTime());

                        scheduler.rescheduleJob(triggerKey, tg);//按新的trigger又一次设置job运行

                }

            }

            scheduler.start();

        }

        catch (Exception e)

        {

            throw new QuartzException("ScheduleStartListener  recovery() Error!", e);

        }

    }

}

測试案例第一步: Job 接口实现类JobTest

顾名思义,用于自己定义任务,方法的实现.你能够在当中写入随意你想要在那个点上干的事情(操作数据库,前台显示等).在以下那处地方写入你想要写的:System.out.println("添入须要增加任务的详细操作");
.顺便说下,这个异常自己定义(不须要删除就可以):

package test.quartz;

import org.quartz.Job;

import org.quartz.JobDataMap;

import org.quartz.JobExecutionContext;

import org.quartz.JobExecutionException;

import org.quartz.JobKey;

import org.quartz.Scheduler;

import org.quartz.SchedulerException;

import org.quartz.SchedulerFactory;

import org.quartz.TriggerKey;

import org.quartz.impl.StdSchedulerFactory;

import sedion.jeffli.wmuitp.exception.QuartzException;

public class JobTest implements Job{

    public JobTest() {}    

    public void execute(JobExecutionContext context)throws JobExecutionException

    {  

        JobDataMap data = context.getJobDetail().getJobDataMap();

        System.out.println("data.testId : "+data.getInt("testId")); //不须要可删除

        try

        {

            System.out.println("添入须要增加任务的详细操作");

        }

        catch (Exception e)

        {

            throw new QuartzException("JobTest execute() ERROR !!", e);

        }

    }  

    public static void removeJob(JobKey jobKey, TriggerKey tiKey)throws SchedulerException

    { 

        SchedulerFactory sf     = new StdSchedulerFactory();

        Scheduler          sched     = sf.getScheduler();  

        sched.pauseTrigger(tiKey);            //停止触发器

        sched.unscheduleJob(tiKey);            //移除触发器

        sched.deleteJob(jobKey);            //删除任务  

    }

}

測试案例第二步:QuartzTest

顾名思义,用于实现,检验.能够通过SchedulerFactory创建一个Scheduler实例,把触发器在集群节点实例命名的组仅仅是为了区分（伐木）从什么地方定问调度又一次运行此作业，假设它是正在进行时调度下去.

package test.quartz;

import static org.quartz.JobBuilder.newJob;

import static org.quartz.TriggerBuilder.newTrigger;

import java.util.Date;

import org.quartz.JobDetail;

import org.quartz.Scheduler;

import org.quartz.SchedulerFactory;

import org.quartz.SimpleTrigger;

import org.quartz.impl.StdSchedulerFactory;

public class QuartzTest

{

    public void run(String date, int id)throws Exception

    {

        SchedulerFactory schedulerFactory = new StdSchedulerFactory();

        Scheduler scheduler = schedulerFactory.getScheduler();//能够通过SchedulerFactory创建一个Scheduler实例

        //设置工作详情

        JobDetail job = newJob(JobTest.class)

            .withIdentity("job_"+id, "test"+id)         // (String name, String group)把触发器在集群节点实例命名的组仅仅是为了区分（伐木）从什么地方定问调度又一次运行此作业，假设它是正在进行时调度下去...

            .requestRecovery()

            .build();

        job.getJobDataMap().put("testId", id);        //设置存储參数(不须要可删除)

        Date startDate = FormatDate.stringToDateAll(date);//Date转String

        //设置触发器

        SimpleTrigger trigger = (SimpleTrigger) newTrigger()

                .withIdentity("overdue"+id, "overdue"+id)//withIdentity("trigger", "group")

                .startAt(startDate)

                .build();

        scheduler.scheduleJob(job, trigger);

        scheduler.start();

        System.out.println("------- Start Scheduler ----------------");

    }

    public static void main(String[] args) throws Exception

    {

        QuartzTest quartzOverdue = new QuartzTest();

        quartzOverdue.run("2014-07-02 00:30:00",666);//666,随便的吉祥数字

    }

}

这边,项目tomcat启动.这边我的主机时间是:

然后我们运行:

public static void main(String[] args) throws Exception

    {

        QuartzTest quartzOverdue = new QuartzTest();

        quartzOverdue.run("2014-07-02 00:30:00",666);//666,随便的吉祥数字

    }

看控制台:

先输出

------- Start Scheduler ----------------

然后时间到了

添入须要增加任务的详细操作