37 lines
930 B
Python
37 lines
930 B
Python
"""Worker Event Heartbeat Bootstep."""
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from celery import bootsteps
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from celery.worker import heartbeat
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from .events import Events
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__all__ = ('Heart',)
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class Heart(bootsteps.StartStopStep):
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"""Bootstep sending event heartbeats.
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This service sends a ``worker-heartbeat`` message every n seconds.
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Note:
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Not to be confused with AMQP protocol level heartbeats.
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"""
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requires = (Events,)
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def __init__(self, c,
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without_heartbeat=False, heartbeat_interval=None, **kwargs):
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self.enabled = not without_heartbeat
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self.heartbeat_interval = heartbeat_interval
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c.heart = None
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super().__init__(c, **kwargs)
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def start(self, c):
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c.heart = heartbeat.Heart(
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c.timer, c.event_dispatcher, self.heartbeat_interval,
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)
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c.heart.start()
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def stop(self, c):
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c.heart = c.heart and c.heart.stop()
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shutdown = stop
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