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from plugin.models import SchedulerJob |
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from plugin.modules.core.base import Module |
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from plugin.modules.scheduler.handlers import BackupMaintenanceIntervalHandler, SyncIntervalHandler |
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from datetime import datetime |
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from threading import Thread |
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import logging |
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import time |
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log = logging.getLogger(__name__) |
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HANDLERS = [ |
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BackupMaintenanceIntervalHandler, |
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SyncIntervalHandler |
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] |
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class Scheduler(Module): |
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__key__ = 'scheduler' |
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handlers = dict([ |
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(h.key, h) for h in HANDLERS |
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if h.key is not None |
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]) |
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def __init__(self): |
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self._running = False |
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self._thread = Thread(target=self.run, name='Scheduler') |
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self._thread.daemon = True |
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def start(self): |
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self._running = True |
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self._thread.start() |
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log.debug('Started') |
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def run(self): |
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while self._running: |
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# Process batch |
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self.process() |
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# Wait 60s before re-checking |
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time.sleep(60) |
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def process(self): |
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# Retrieve due jobs |
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now = datetime.utcnow() |
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jobs = list(SchedulerJob.select().where( |
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SchedulerJob.due_at <= now |
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)) |
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if len(jobs) < 1: |
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return |
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log.debug('Processing %s job(s)', len(jobs)) |
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for job in jobs: |
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# Process job |
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update = self.process_job(job) |
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# Update job status |
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self.finish(job, update) |
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log.debug('Complete') |
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def process_job(self, job): |
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if job.account.deleted: |
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# Ignore scheduled jobs for deleted accounts |
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return True |
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log.info('Running job: %r', job) |
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# Retrieve handler for job |
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handler = self.handlers.get(job.task_key) |
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if handler is None: |
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log.info('Deleting job with unknown task key: %r', job.task_key) |
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job.delete_instance() |
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return False |
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# Run handler |
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try: |
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h = handler() |
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return h.run(job) |
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except Exception, ex: |
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log.error('Exception raised in job handler: %s', ex, exc_info=True) |
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return True |
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@staticmethod |
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def finish(job, update=True): |
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if not update: |
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return |
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# Update status |
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job.ran_at = datetime.utcnow() |
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job.due_at = job.next_at() |
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# Save changes |
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job.save() |
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