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# encoding: utf-8 |
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""" |
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reactor/interrupt.py |
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Created by Thomas Mangin on 2017-07-01. |
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Copyright (c) 2009-2017 Exa Networks. All rights reserved. |
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License: 3-clause BSD. (See the COPYRIGHT file) |
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""" |
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import signal |
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from exabgp.logger import log |
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class Signal(object): |
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NONE = 0 |
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SHUTDOWN = -1 |
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RESTART = -2 |
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RELOAD = -4 |
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FULL_RELOAD = -8 |
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_names = { |
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**dict( |
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(k, v) |
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for v, k in reversed(sorted(signal.__dict__.items())) |
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if v.startswith('SIG') and not v.startswith('SIG_') |
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), |
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**{ |
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NONE: 'none', |
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SHUTDOWN: 'shutdown', |
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RESTART: 'restart', |
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RELOAD: 'reload', |
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FULL_RELOAD: 'full reload', |
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# some padding to make black format this as we like :-) |
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}, |
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} |
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@classmethod |
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def name(cls, received): |
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return cls._names.get(received, 'unknown') |
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def __init__(self): |
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self.received = self.NONE |
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self.number = 0 |
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self.rearm() |
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def rearm(self): |
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self.received = Signal.NONE |
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self.number = 0 |
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signal.signal(signal.SIGTERM, self.sigterm) |
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signal.signal(signal.SIGHUP, self.sighup) |
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signal.signal(signal.SIGALRM, self.sigalrm) |
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signal.signal(signal.SIGUSR1, self.sigusr1) |
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signal.signal(signal.SIGUSR2, self.sigusr2) |
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def sigterm(self, signum, frame): |
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log.critical('SIGTERM received', 'reactor') |
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if self.received: |
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log.critical('ignoring - still handling previous signal', 'reactor') |
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return |
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log.critical('scheduling shutdown', 'reactor') |
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self.received = self.SHUTDOWN |
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self.number = signum |
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def sighup(self, signum, frame): |
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log.critical('SIGHUP received', 'reactor') |
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if self.received: |
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log.critical('ignoring - still handling previous signal', 'reactor') |
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return |
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log.critical('scheduling shutdown', 'reactor') |
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self.received = self.SHUTDOWN |
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self.number = signum |
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def sigalrm(self, signum, frame): |
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log.critical('SIGALRM received', 'reactor') |
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if self.received: |
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log.critical('ignoring - still handling previous signal', 'reactor') |
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return |
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log.critical('scheduling restart', 'reactor') |
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self.received = self.RESTART |
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self.number = signum |
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def sigusr1(self, signum, frame): |
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log.critical('SIGUSR1 received', 'reactor') |
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if self.received: |
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log.critical('ignoring - still handling previous signal', 'reactor') |
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return |
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log.critical('scheduling reload of configuration', 'reactor') |
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self.received = self.RELOAD |
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self.number = signum |
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def sigusr2(self, signum, frame): |
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log.critical('SIGUSR2 received', 'reactor') |
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if self.received: |
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log.critical('ignoring - still handling previous signal', 'reactor') |
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return |
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log.critical('scheduling reload of configuration and processes', 'reactor') |
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self.received = self.FULL_RELOAD |
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self.number = signum |
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Exa-Networks /
exabgp
