81 lines
2.3 KiB
Python
81 lines
2.3 KiB
Python
#
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# Copyright 2016 Cray Inc., All Rights Reserved
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import errno
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import functools
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from oslo_service import loopingcall
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from bareon_ironic import exception as exc
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class ProcTerminator(object):
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_poll_delay = 0.5
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is_terminated = False
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is_forced = False
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def __init__(self, proc, timeout=10, force_timeout=2, force=True):
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self.proc = proc
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self._actions_queue = [
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(self._do_terminate, timeout)]
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if force:
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self._actions_queue.append(
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(functools.partial(
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self._do_terminate, force=True), force_timeout))
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def __call__(self):
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action_iterator = loopingcall.DynamicLoopingCall(self._do_action)
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action = action_iterator.start()
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poll_iterator = loopingcall.FixedIntervalLoopingCall(
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self._do_poll, action)
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poll = poll_iterator.start(self._poll_delay)
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try:
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poll.wait()
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if self.is_terminated:
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action_iterator.stop()
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else:
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action_iterator.wait()
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except OSError as e:
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if e.errno != errno.ESRCH:
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raise
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def _do_poll(self, action):
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if action.ready():
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raise loopingcall.LoopingCallDone()
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rcode = self.proc.poll()
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if rcode is None:
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return
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self.is_terminated = True
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raise loopingcall.LoopingCallDone()
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def _do_action(self):
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try:
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action, timeout = self._actions_queue.pop(0)
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except IndexError:
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raise exc.SurvivedSubprocess(pid=self.proc.pid)
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action()
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return timeout
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def _do_terminate(self, force=False):
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if not force:
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self.proc.terminate()
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return
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self.proc.kill()
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self.is_forced = True
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