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"""Module responsible to handle schedulers.""" |
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from uuid import uuid4 |
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4
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from apscheduler.schedulers.background import BackgroundScheduler |
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5
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from apscheduler.triggers.cron import CronTrigger |
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from pytz import utc |
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8
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9
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class CircuitSchedule: |
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"""Schedule events.""" |
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def __init__(self, **kwargs): |
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"""Create a CircuitSchedule object.""" |
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self._id = kwargs.get('id', uuid4().hex) |
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self.date = kwargs.get('date', None) |
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self.interval = kwargs.get('interval', None) |
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self.frequency = kwargs.get('frequency', None) |
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self.action = kwargs.get('action', 'create') |
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@property |
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def id(self): # pylint: disable=invalid-name |
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"""Return this EVC's ID.""" |
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return self._id |
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def as_dict(self): |
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"""Return a dictionary representing an circuit schedule object.""" |
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circuit_scheduler_dict = {'id': self.id, 'action': self.action} |
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if self.date: |
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circuit_scheduler_dict['date'] = self.date |
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if self.frequency: |
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circuit_scheduler_dict['frequency'] = self.frequency |
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if self.interval: |
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circuit_scheduler_dict['interval'] = self.interval |
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return circuit_scheduler_dict |
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@classmethod |
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def from_dict(cls, data): |
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"""Return a CircuitSchedule object from dict.""" |
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return cls(**data) |
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class Scheduler: |
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"""Class to schedule the circuits rules.""" |
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def __init__(self): |
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"""Create a new schedule structure.""" |
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self.scheduler = BackgroundScheduler(timezone=utc) |
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self.scheduler.start() |
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def shutdown(self): |
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"""Shutdown the scheduler.""" |
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self.scheduler.shutdown(wait=False) |
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def add(self, circuit): |
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"""Add all circuit_scheduler from specific circuit.""" |
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for circuit_scheduler in circuit.circuit_scheduler: |
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data = {'id': circuit_scheduler.id} |
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action = None |
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if circuit_scheduler.action == 'create': |
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action = circuit.deploy |
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elif circuit_scheduler.action == 'remove': |
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action = circuit.remove |
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if circuit_scheduler.date: |
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data.update({'run_date': circuit_scheduler.date}) |
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self.scheduler.add_job(action, 'date', **data) |
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else: |
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data.update({'start_date': circuit.start_date, |
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'end_date': circuit.end_date}) |
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if circuit_scheduler.interval: |
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data.update(circuit_scheduler.interval) |
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self.scheduler.add_job(action, 'interval', **data) |
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elif circuit_scheduler.frequency: |
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cron = CronTrigger.from_crontab(circuit_scheduler.frequency, |
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timezone=utc) |
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self.scheduler.add_job(action, cron, **data) |
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83
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def remove(self, circuit): |
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"""Remove all scheduler from a circuit.""" |
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for job in circuit.circuit_scheduler: |
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self.cancel_job(job.id) |
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def cancel_job(self, circuit_scheduler_id): |
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"""Cancel a specific job from scheduler.""" |
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self.scheduler.remove_job(circuit_scheduler_id) |
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kytos /
mef_eline
