如何跳过cron触发器触发时间 [英] how to skip cron trigger firetime

问题描述

我正在从远程主机上的目录传输文件，当此作业的间隔到达时，触发器会触发作业.但我想确定，如果在触发时作业仍在存储上工作(下载尚未完成的文件)点火时间到了，石英要跳过这个间隔.我尝试使用这个c r on_trigger.MISFIRE_INSTRUCTION_DO_NOTHING 但我似乎只适用于没有可用线程的情况.

I am transferring files from a directory on a remote host and a trigger fires jobs when interval arrives for this job.But i want be sure that if a job still working on a storage (downloading of files not yet finished) when trigger fire time arrives ,quartz going to skip this interval.I try to use this c r on_trigger.MISFIRE_INSTRUCTION_DO_NOTHING but i seems it only for if there is no available thread for job.

public CronTrigger scheduleJob(RemoteJob job, String cronExpression,Date firstFireTime) throws SchedulerException, ParseException {
    JobDetail jobDetail = new JobDetail(job.getDescription(), job.getName(), job.getClass());
    CronTrigger crTrigger = new CronTrigger(
            "cronTrigger", job.getName(), cronExpression);       
    scheduler.scheduleJob(jobDetail, crTrigger);    
    crTrigger.setStartTime(firstFireTime);
    crTrigger.setMisfireInstruction(CronTrigger.MISFIRE_INSTRUCTION_DO_NOTHING);
    return crTrigger;

}

推荐答案

创建一个 TriggerListener 来跟踪您的一个下载作业是否正在运行，然后返回 true 以否决其他类型的作业的执行.

Create a TriggerListener that tracks if one of your download jobs is running, and and then return true for vetoing the execution of the other type of job.

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