title: Quartz定时任务调度的使用及相关工具
date: 2020-08-31
tags:
 - springboot
 - quartz
categories:
 -  Quartz
author: lmz

        <!--quartz依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-quartz</artifactId>
        </dependency>

public class ScheduleUtils {
    private final static String JOB_NAME = "TASK_";

    /**
     * 获取触发器key
     */
    public static TriggerKey getTriggerKey(Long jobId) {
        return TriggerKey.triggerKey(JOB_NAME + jobId);
    }

    /**
     * 获取jobKey
     */
    public static JobKey getJobKey(Long jobId) {
        return JobKey.jobKey(JOB_NAME + jobId);
    }

    /**
     * 获取表达式触发器
     */
    public static CronTrigger getCronTrigger(Scheduler scheduler, Long jobId) {
        try {
            return (CronTrigger) scheduler.getTrigger(getTriggerKey(jobId));
        } catch (SchedulerException e) {
            return null;
        }
    }

    /**
     * 创建定时任务
     */
    public static void createScheduleJob(Scheduler scheduler, QuartzEntity scheduleJob) {
        try {
            //构建job信息
            JobDetail jobDetail =
                    JobBuilder.newJob(ScheduleJob.class).withIdentity(getJobKey(scheduleJob.getJobId())).build();
            //表达式调度构建器
            CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(scheduleJob.getCronExpression())
                    .withMisfireHandlingInstructionDoNothing();
            //按新的cronExpression表达式构建一个新的trigger
            CronTrigger trigger =
                    TriggerBuilder.newTrigger().withIdentity(getTriggerKey(scheduleJob.getJobId())).withSchedule(scheduleBuilder).build();
            //放入参数，运行时的方法可以获取
            jobDetail.getJobDataMap().put(QuartzEntity.JOB_PARAM_KEY, scheduleJob);
            scheduler.scheduleJob(jobDetail, trigger);

            //暂停任务
            if (scheduleJob.getStatus() == Constant.ScheduleStatus.PAUSE.getValue()) {
                pauseJob(scheduler, scheduleJob.getJobId());
            }
            //执行调度器
            scheduler.start();
        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }

    /**
     * 更新定时任务
     */
    public static void updateScheduleJob(Scheduler scheduler, QuartzEntity scheduleJob) {
        try {
            TriggerKey triggerKey = getTriggerKey(scheduleJob.getJobId());

            //表达式调度构建器
            CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(scheduleJob.getCronExpression())
                    .withMisfireHandlingInstructionDoNothing();

            CronTrigger trigger = getCronTrigger(scheduler, scheduleJob.getJobId());

            //按新的cronExpression表达式重新构建trigger
            trigger = trigger.getTriggerBuilder().withIdentity(triggerKey).withSchedule(scheduleBuilder).build();

            //参数
            trigger.getJobDataMap().put(QuartzEntity.JOB_PARAM_KEY, scheduleJob);

            scheduler.rescheduleJob(triggerKey, trigger);

            //暂停任务
            if (scheduleJob.getStatus() == Constant.ScheduleStatus.PAUSE.getValue()) {
                pauseJob(scheduler, scheduleJob.getJobId());
            }

        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }

    /**
     * 立即执行任务
     */
    public static void run(Scheduler scheduler, QuartzEntity scheduleJob) {
        try {
            //参数
            JobDataMap dataMap = new JobDataMap();
            dataMap.put(QuartzEntity.JOB_PARAM_KEY, scheduleJob);

            scheduler.triggerJob(getJobKey(scheduleJob.getJobId()), dataMap);
        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }

    /**
     * 暂停任务
     */
    public static void pauseJob(Scheduler scheduler, Long jobId) {
        try {
            scheduler.pauseJob(getJobKey(jobId));
        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }

    /**
     * 恢复任务
     */
    public static void resumeJob(Scheduler scheduler, Long jobId) {
        try {
            scheduler.resumeJob(getJobKey(jobId));
        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }

    /**
     * 删除定时任务
     */
    public static void deleteScheduleJob(Scheduler scheduler, Long jobId) {
        try {
            scheduler.deleteJob(getJobKey(jobId));
        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }
}

public class ScheduleJob extends QuartzJobBean {
    private final Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
        QuartzEntity scheduleJob = (QuartzEntity) context.getMergedJobDataMap()
                .get(QuartzEntity.JOB_PARAM_KEY);

        //任务开始时间
        long startTime = System.currentTimeMillis();

        try {
            //执行任务
            logger.info("任务准备执行，任务ID：" + scheduleJob.getJobId());
            //获取java类对象
            Object target = SpringContextUtils.getBean(scheduleJob.getBeanName());
            //获取执行方法
            Method method = target.getClass().getDeclaredMethod("run", String.class);
            method.setAccessible(true);
            //执行
            method.invoke(target, scheduleJob.getParams());
            //任务执行总时长
            long times = System.currentTimeMillis() - startTime;
            logger.info("任务执行完毕，任务ID：" + scheduleJob.getJobId() + "  总共耗时：" + times + "毫秒");
        } catch (Exception e) {
            logger.error("任务执行失败，任务ID：" + scheduleJob.getJobId(), e);
        }
    }
}

  private final Scheduler scheduler;
    @PostConstruct
    public void init() {
        List<QuartzEntity> scheduleJobList = this.list();
        for (QuartzEntity scheduleJob : scheduleJobList) {
            CronTrigger cronTrigger = ScheduleUtils.getCronTrigger(scheduler, scheduleJob.getJobId());
            //如果不存在，则创建
            if (cronTrigger == null) {
                ScheduleUtils.createScheduleJob(scheduler, scheduleJob);
            } else {
                ScheduleUtils.updateScheduleJob(scheduler, scheduleJob);
            }
        }
    }