springboot集成 quartz定时任务 数据库动态配置

目的：开发中遇上多个定时任务，并且每个定时任务时间都是用数据库表管理的

           我们在修改表的定时任务时间时，也会同步更新程序中该任务的执行时间。

步骤

1.定时刷新数据库表中数据，如果是新增的数据则创建新的任务，如果只是针对时间修改的任务，则刷新改任务的时间

 2.网络上的很多都是一个任务，没谈论到多个任务的案例

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第一步：创建一个任务处理类

@Slf4j
@Component
public class ScheduledChannelWarn implements Job {

    @Resource
    private PublicChannelWarnService publicChannelWarnService;

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        JobDataMap jobDataMap = context.getMergedJobDataMap();
         //这个位置是获取下一步保存的数据，写自己需要的业务
         

        String warn=jobDataMap.getString("warn");
        log.info("warn: "+warn);
        //PublicChannelWarn ChannelWarn = JSONUtil.toBean(warn, PublicChannelWarn.class);
        //if(ConstantsObject.ONE_STRING.equals(ChannelWarn.getWarnType())){
            //publicChannelWarnService.warnClientUserJob(ChannelWarn);
        // }
         //通道警告
         //if(ConstantsObject.TWO_STRING.equals(ChannelWarn.getWarnType())){
            //publicChannelWarnService.warnChannelJob(ChannelWarn);
         //}
         //接入点警告
         //if(ConstantsObject.THREE_STRING.equals(ChannelWarn.getWarnType())){
            //publicChannelWarnService.warnAccessJob(ChannelWarn);
        // }
    }
}

第二步，定时任务配置类编写

@Slf4j
@Configuration
public class ScheduledChannelWarnJob {

    @Resource
    private PublicChannelWarnMapper publicChannelWarnMapper;

    @Resource
    private SchedulerFactoryBean schedulerFactoryBean;

    
    @Scheduled(cron = "*/20 * * * * ?")
    public void scheduleJobs() throws SchedulerException {
        List warnList = publicChannelWarnMapper.selectList(new QueryWrapper<>());
        if(CollUtil.isNotEmpty(warnList)){
            Scheduler scheduler = schedulerFactoryBean.getScheduler();
            for(PublicChannelWarn warn:warnList){
                scheduleJob(scheduler,warn);
            }
        }
    }

    
    private void scheduleJob(Scheduler scheduler,PublicChannelWarn warn) throws SchedulerException{

        String jobName="jobName"+warn.getId();
        String jobGroup="jobGroup"+warn.getId();

        String triggerName="triggerName"+warn.getId();
        String triggerGroup="triggerGroup"+warn.getId();

        JobKey jobKey = new JobKey(jobName, jobGroup);
        //获取当前的job 判断是否已经存在
        JobDetail crrentjobDetail = scheduler.getJobDetail(jobKey);
        //如果当前线程已存在，则刷新时间
        if(ObjectUtil.isNotEmpty(crrentjobDetail)){
            log.info("=====当前线程已存在====");
            TriggerKey triggerKey = new TriggerKey(triggerName, triggerGroup);
            CronTrigger cronTrigger = (CronTrigger) scheduler.getTrigger(triggerKey);
            String oldTime = cronTrigger.getCronExpression();
            if (!oldTime.equalsIgnoreCase(warn.getCorn())) {
                log.info("=====刷新定时器时间====");
                CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(warn.getCorn());
                CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(triggerName, triggerGroup)
                        .withSchedule(cronScheduleBuilder).build();
            }
        }else{
            log.info("=====创建新的定时任务====");
            JobDetail jobDetail = JobBuilder.newJob(ScheduledChannelWarn.class)
                    //这个位置是你自己需要传的数据，处理业务逻辑，可传多个
                    .usingJobData("warn", JSONUtil.toJsonStr(warn))
                    .withIdentity(jobName, jobGroup).build();
            // 每5s执行一次
            CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(warn.getCorn());
            CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity(triggerName, triggerGroup) .withSchedule(scheduleBuilder).build();
            scheduler.scheduleJob(jobDetail,cronTrigger);
        }
    }

}