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Quartz监听器Listerner

由 百般思念 提交于 2019-11-28 12:24:53

概述

Quartz的监听器用于当任务调度中你所关注事件发生时，能够及时获取这一事件的通知。Quartz监听器主要有JobListener、TriggerListener、SchedulerListener三种，顾名思义，分别表示任务、触发器、调度器对应的监听器。三者的使用方法类似，在开始介绍三种监听器之前，需要明确两个概念：全局监听器与非全局监听器，二者的区别在于：全局监听器能够接收到所有的Job/Trigger的事件通知，而非全局监听器只能接收到在其上注册的Job或Trigger的事件，不在其上注册的Job或Trigger则不会进行监听。

JobListener

任务调度过程中，与任务Job相关的事件包括：job开始要执行的提示; job执行完成的提示灯。其接口如下：

public interface JobListener {

    public String getName();

    public void jobToBeExecuted(JobExecutionContext context);

    public void jobExecutionVetoed(JobExecutionContext context);

    public void jobWasExecuted(JobExecutionContext context,
            JobExecutionException jobException);

}

  • getName方法：用于获取该JobListener的名称。

  • jobToBeExecuted方法：Scheduler在JobDetail将要被执行时调用这个方法。

  • jobExecutionVetoed方法：Scheduler在JobDetail即将被执行，但又被TriggerListerner否决时会调用该方法

  • jobWasExecuted方法：Scheduler在JobDetail被执行之后调用这个方法

参考如下代码

package com;

import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.JobListener;

/**
 * @program: hello
 * @description:
 * @author: lee
 * @create: 2019-01-17
 **/
public class JobListenerDemo implements JobListener {
    @Override
    public String getName() {

        String name=getClass().getSimpleName();

        return name;
    }

    @Override
    public void jobToBeExecuted(JobExecutionContext jobExecutionContext) {
        String jobname=jobExecutionContext.getJobDetail().getKey().getName();
        System.out.println(jobname+"is going to be executed");
    }

    @Override
    public void jobExecutionVetoed(JobExecutionContext jobExecutionContext) {
        String jobname=jobExecutionContext.getJobDetail().getKey().getName();
        System.out.println(jobname+"was vetoed and not executed");
    }

    @Override
    public void jobWasExecuted(JobExecutionContext jobExecutionContext, JobExecutionException e) {
        String jobname=jobExecutionContext.getJobDetail().getKey().getName();
        System.out.println(jobname+"was executed");
    }
}


package com;

import com.sun.org.apache.xpath.internal.SourceTree;
import org.quartz.*;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @program: hello
 * @description: 自定义Job
 * @author: lee
 * @create: 2019-01-13
 **/

public class PJob implements Job {
    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {

        Date date=new Date();
        SimpleDateFormat dateFormat= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateString=dateFormat.format(date);
        System.out.println("正在运行job任务，运行时间是:"+dateString);
    }
}

package com;

import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import org.quartz.impl.matchers.EverythingMatcher;
import org.quartz.impl.matchers.KeyMatcher;

import java.util.Date;

/**
 * @program: hello
 * @description: 任务调度入口
 * @author: lee
 * @create: 2019-01-13
 **/
public class PScheduller {
    public static void main(String[] args) throws SchedulerException {

        PScheduller exam = new PScheduller();
        Scheduler scheduler = exam.createScheduler();

        JobDetail jobDetail = exam.createJobDetail("jobid", "jobgroup");

        Trigger trigger = exam.createTrigger("tiggername", "triggergroup");


        JobDetail jobDetail2 = exam.createJobDetail("jobid2", "jobgroup2");

        Trigger trigger2 = exam.createTrigger("tiggername2", "triggergroup2");

        scheduler.scheduleJob(jobDetail, trigger);
        scheduler.scheduleJob(jobDetail2, trigger2);
        // 创建并注册一个全局的Job Listener
        //scheduler.getListenerManager().addJobListener(new JobListenerDemo(), EverythingMatcher.allJobs());
        // 创建并注册一个指定任务的Job Listener
        scheduler.getListenerManager().addJobListener(new JobListenerDemo(), KeyMatcher.keyEquals(JobKey.jobKey("jobid","jobgroup")));
        scheduler.start();
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        scheduler.shutdown();
    }

    protected Scheduler createScheduler() throws SchedulerException {
        return StdSchedulerFactory.getDefaultScheduler();
    }

    protected Trigger createTrigger(String triggerName, String triggerGroup) {
        return TriggerBuilder.newTrigger().withIdentity(triggerName, triggerGroup)
                .withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(4).repeatForever())
                .build();
    }

    protected JobDetail createJobDetail(String jobName, String jobGroup) {
        return JobBuilder.newJob(PJob.class)
                .withIdentity(jobName, jobGroup)
                .build();
    }
}

输出结果 第一种情况

jobidis going to be executed
jobid2is going to be executed
正在运行job任务，运行时间是:2019-01-21 20:29:31
正在运行job任务，运行时间是:2019-01-21 20:29:31
jobidwas executed
jobid2was executed

第二种情况

jobidis going to be executed
正在运行job任务，运行时间是:2019-01-21 20:28:31
jobidwas executed
正在运行job任务，运行时间是:2019-01-21 20:28:31

将同一任务组的任务注册到监听器中

scheduler.getListenerManager().addJobListener(new JobListenerDemo(), GroupMatcher.jobGroupEquals("jobgroup2"));

将两个任务组的任务注册到监听器中

scheduler.getListenerManager().addJobListener(new JobListenerDemo(), OrMatcher.or(GroupMatcher.jobGroupEquals("jobgroup"),
                GroupMatcher.jobGroupEquals("jobgroup2")));

TriggerListener

任务调度过程中，与触发器Trigger相关的事件包括：触发器触发、触发器未正常触发、触发器完成等。TriggerListener的接口如下：

public interface TriggerListener {

    public String getName();

    public void triggerFired(Trigger trigger, JobExecutionContext context);

    public boolean vetoJobExecution(Trigger trigger, JobExecutionContext context);

    public void triggerMisfired(Trigger trigger);

    public void triggerComplete(Trigger trigger, JobExecutionContext context,
            int triggerInstructionCode);
}

  • getName方法：用于获取触发器的名称

  • triggerFired方法：当与监听器相关联的Trigger被触发，Job上的execute()方法将被执行时，Scheduler就调用该方法。

  • vetoJobExecution方法：在 Trigger 触发后，Job 将要被执行时由 Scheduler 调用这个方法。TriggerListener 给了一个选择去否决 Job 的执行。假如这个方法返回 true，这个 Job 将不会为此次 Trigger 触发而得到执行。

  • triggerMisfired方法：Scheduler 调用这个方法是在 Trigger 错过触发时。你应该关注此方法中持续时间长的逻辑：在出现许多错过触发的 Trigger 时，长逻辑会导致骨牌效应。你应当保持这上方法尽量的小。

  • triggerComplete方法：Trigger 被触发并且完成了 Job 的执行时，Scheduler 调用这个方法。

代码如下

package com;

import org.quartz.JobExecutionContext;
import org.quartz.Trigger;
import org.quartz.TriggerListener;

/**
 * @program: hello
 * @description:
 * @author: lee
 * @create: 2019-01-21
 **/
public class TriggerListenerDemo implements TriggerListener {

    private String name;

    public TriggerListenerDemo(String name) {
        this.name = name;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void triggerFired(Trigger trigger, JobExecutionContext jobExecutionContext) {
        String name=trigger.getKey().getName();
        System.out.println("trigger name is "+name);
    }

    @Override
    public boolean vetoJobExecution(Trigger trigger, JobExecutionContext jobExecutionContext) {
        return false;
    }

    @Override
    public void triggerMisfired(Trigger trigger) {
        String name=trigger.getKey().getName();
        System.out.println("triggerMisfired is running "+name);

    }

    @Override
    public void triggerComplete(Trigger trigger, JobExecutionContext jobExecutionContext, Trigger.CompletedExecutionInstruction completedExecutionInstruction) {
        String name=trigger.getKey().getName();
        System.out.println("triggerComplete is running "+name);
    }
}

调度程序中需要加入


scheduler.getListenerManager().addTriggerListener(new TriggerListenerDemo("TriggerListenerDemo"),
                GroupMatcher.groupEquals("triggergroup"));

SchedulerListener

SchedulerListener会在Scheduler的生命周期中关键事件发生时被调用。与Scheduler有关的事件包括：增加一个job/trigger，删除一个job/trigger，scheduler发生严重错误，关闭scheduler等。

public interface SchedulerListener {

    public void jobScheduled(Trigger trigger);

    public void jobUnscheduled(String triggerName, String triggerGroup);

    public void triggerFinalized(Trigger trigger);

    public void triggersPaused(String triggerName, String triggerGroup);

    public void triggersResumed(String triggerName, String triggerGroup);

    public void jobsPaused(String jobName, String jobGroup);

    public void jobsResumed(String jobName, String jobGroup);

    public void schedulerError(String msg, SchedulerException cause);

    public void schedulerStarted();

    public void schedulerInStandbyMode();

    public void schedulerShutdown();

    public void schedulingDataCleared();
}

  • jobScheduled方法：用于部署JobDetail时调用

  • jobUnscheduled方法：用于卸载JobDetail时调用

  • triggerFinalized方法：当一个 Trigger 来到了再也不会触发的状态时调用这个方法。除非这个 Job 已设置成了持久性，否则它就会从 Scheduler 中移除。

  • triggersPaused方法：Scheduler 调用这个方法是发生在一个 Trigger 或 Trigger 组被暂停时。假如是 Trigger 组的话，triggerName 参数将为 null。

  • triggersResumed方法：Scheduler 调用这个方法是发生成一个 Trigger 或 Trigger 组从暂停中恢复时。假如是 Trigger 组的话，假如是 Trigger 组的话，triggerName 参数将为 null。参数将为 null。

  • jobsPaused方法：当一个或一组 JobDetail 暂停时调用这个方法。

  • jobsResumed方法：当一个或一组 Job 从暂停上恢复时调用这个方法。假如是一个 Job 组，jobName 参数将为 null。

  • schedulerError方法：在 Scheduler 的正常运行期间产生一个严重错误时调用这个方法。

  • schedulerStarted方法：当Scheduler 开启时，调用该方法

  • schedulerInStandbyMode方法： 当Scheduler处于StandBy模式时，调用该方法

  • schedulerShutdown方法：当Scheduler停止时，调用该方法

  • schedulingDataCleared方法：当Scheduler中的数据被清除时，调用该方法。

示例：

package com;

import org.quartz.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @program: hello
 * @description:
 * @author: lee
 * @create: 2019-01-21
 **/
public class SchedullerListener implements SchedulerListener {

    private static Logger logger = LoggerFactory.getLogger(SchedullerListener.class);

    @Override
    public void jobScheduled(Trigger trigger) {
        String jobName = trigger.getJobKey().getName();
        System.out.println(jobName + " has been scheduled");
    }

    @Override
    public void jobUnscheduled(TriggerKey triggerKey) {

        System.out.println(triggerKey + " is being unscheduled");
    }

    @Override
    public void triggerFinalized(Trigger trigger) {
        System.out.println("Trigger is finished for " + trigger.getJobKey().getName());
    }

    @Override
    public void triggerPaused(TriggerKey triggerKey) {
        System.out.println(triggerKey + " is being paused");
    }

    @Override
    public void triggersPaused(String triggerGroup) {
        System.out.println("trigger group "+triggerGroup + " is being paused");
    }

    @Override
    public void triggerResumed(TriggerKey triggerKey) {
        System.out.println(triggerKey + " is being resumed");
    }

    @Override
    public void triggersResumed(String triggerGroup) {
        System.out.println("trigger group "+triggerGroup + " is being resumed");
    }

    @Override
    public void jobAdded(JobDetail jobDetail) {
        System.out.println(jobDetail.getKey()+" is added");
    }

    @Override
    public void jobDeleted(JobKey jobKey) {
        System.out.println(jobKey+" is deleted");
    }

    @Override
    public void jobPaused(JobKey jobKey) {
        System.out.println(jobKey+" is paused");
    }

    @Override
    public void jobsPaused(String jobGroup) {
        System.out.println("job group "+jobGroup+" is paused");
    }

    @Override
    public void jobResumed(JobKey jobKey) {
        System.out.println(jobKey+" is resumed");
    }

    @Override
    public void jobsResumed(String jobGroup) {
        System.out.println("job group "+jobGroup+" is resumed");

    }

    @Override
    public void schedulerError(String msg, SchedulerException cause) {
        System.out.println(cause.getUnderlyingException());
    }

    @Override
    public void schedulerInStandbyMode() {
        logger.info("scheduler is in standby mode");
    }

    @Override
    public void schedulerStarted() {
        logger.info("scheduler has been started");
    }

    @Override
    public void schedulerStarting() {
        logger.info("scheduler is being started");
    }

    @Override
    public void schedulerShutdown() {
        logger.info("scheduler has been shutdown");
    }

    @Override
    public void schedulerShuttingdown() {
        logger.info("scheduler is being shutdown");
    }

    @Override
    public void schedulingDataCleared() {
        logger.info("scheduler has cleared all data");
    }
}

调度器代码

package com;

import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import org.quartz.impl.matchers.EverythingMatcher;
import org.quartz.impl.matchers.GroupMatcher;
import org.quartz.impl.matchers.KeyMatcher;
import org.quartz.impl.matchers.OrMatcher;

import java.util.Date;

/**
 * @program: hello
 * @description: 任务调度入口
 * @author: lee
 * @create: 2019-01-13
 **/
public class PScheduller {
    public static void main(String[] args) throws SchedulerException, InterruptedException {

        PScheduller exam = new PScheduller();
        Scheduler scheduler = exam.createScheduler();

        JobDetail jobDetail = exam.createJobDetail("jobid", "jobgroup");

        Trigger trigger = exam.createTrigger("tiggername", "triggergroup");



        scheduler.scheduleJob(jobDetail, trigger);

        // 创建SchedulerListener
        scheduler.getListenerManager().addSchedulerListener(new SchedullerListener());
        scheduler.start();

        Thread.sleep(20000);

        scheduler.shutdown();
    }

    protected Scheduler createScheduler() throws SchedulerException {
        return StdSchedulerFactory.getDefaultScheduler();
    }

    protected Trigger createTrigger(String triggerName, String triggerGroup) {
        return TriggerBuilder.newTrigger().withIdentity(triggerName, triggerGroup)
                .withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(4).repeatForever())
                .build();
    }

    protected JobDetail createJobDetail(String jobName, String jobGroup) {
        return JobBuilder.newJob(PJob.class)
                .withIdentity(jobName, jobGroup)
                .build();
    }
}
标签
quartz
监听器
trigger
string
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