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- from crontab import CronTab
- from crontab import CronSlices
- class InvalidCrontabPeriod(Exception):
- pass
- CRONTAB_COMMENT = "JARVIS"
- class CrontabManager:
- def __init__(self, brain_file=None):
- self.my_user_cron = CronTab(user=True)
- self.base_command = "/usr/bin/echo"
- def load_events_in_crontab(self):
- # clean the current crontab from all jarvis event
- self._remove_all_jarvis_job()
- # # load the brain file
- period_string = "* * 5 5 *"
- event_id = 1
- # for all tasks with an event, we add the task id to the crontab
- self._add_event(period_string=period_string, event_id=event_id)
- def _add_event(self, period_string, event_id):
- my_user_cron = CronTab(user=True)
- job = my_user_cron.new(command=self.base_command, comment=CRONTAB_COMMENT)
- if CronSlices.is_valid(period_string):
- job.setall(period_string)
- job.enable()
- else:
- raise InvalidCrontabPeriod("The crontab period %s is not valid" % period_string)
- # write the file
- my_user_cron.write()
- def get_jobs(self):
- return self.my_user_cron.find_comment(CRONTAB_COMMENT)
- def _remove_all_jarvis_job(self):
- """
- Remove all line in crontab that are attached to JARVIS
- :return:
- """
- iter = self.my_user_cron.find_comment(CRONTAB_COMMENT)
- for job in iter:
- self.my_user_cron.remove(job)
- # write the file
- self.my_user_cron.write()
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