/usr/lib/python2.7/dist-packages/celery/worker/heartbeat.py is in python-celery 3.1.20-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | # -*- coding: utf-8 -*-
"""
celery.worker.heartbeat
~~~~~~~~~~~~~~~~~~~~~~~
This is the internal thread that sends heartbeat events
at regular intervals.
"""
from __future__ import absolute_import
from celery.utils.sysinfo import load_average
from .state import SOFTWARE_INFO, active_requests, all_total_count
__all__ = ['Heart']
class Heart(object):
"""Timer sending heartbeats at regular intervals.
:param timer: Timer instance.
:param eventer: Event dispatcher used to send the event.
:keyword interval: Time in seconds between heartbeats.
Default is 2 seconds.
"""
def __init__(self, timer, eventer, interval=None):
self.timer = timer
self.eventer = eventer
self.interval = float(interval or 2.0)
self.tref = None
# Make event dispatcher start/stop us when enabled/disabled.
self.eventer.on_enabled.add(self.start)
self.eventer.on_disabled.add(self.stop)
def _send(self, event):
return self.eventer.send(event, freq=self.interval,
active=len(active_requests),
processed=all_total_count[0],
loadavg=load_average(),
**SOFTWARE_INFO)
def start(self):
if self.eventer.enabled:
self._send('worker-online')
self.tref = self.timer.call_repeatedly(
self.interval, self._send, ('worker-heartbeat', ),
)
def stop(self):
if self.tref is not None:
self.timer.cancel(self.tref)
self.tref = None
if self.eventer.enabled:
self._send('worker-offline')
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