OpenStack Networking (Neutron)
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from neutron_lib import worker
from oslo_config import cfg
from oslo_service import loopingcall
class NeutronBaseWorker(worker.BaseWorker):
def __init__(self, worker_process_count=1, set_proctitle=None):
set_proctitle = set_proctitle or cfg.CONF.setproctitle
super(NeutronBaseWorker, self).__init__(
worker_process_count=worker_process_count,
set_proctitle=set_proctitle
)
def start(self, name="neutron-server", desc=None):
super(NeutronBaseWorker, self).start(name=name, desc=desc)
class PeriodicWorker(NeutronBaseWorker):
"""A worker that runs a function at a fixed interval."""
def __init__(self, check_func, interval, initial_delay):
super(PeriodicWorker, self).__init__(worker_process_count=0)
self._check_func = check_func
self._loop = None
self._interval = interval
self._initial_delay = initial_delay
def start(self):
super(PeriodicWorker, self).start(desc="periodic worker")
if self._loop is None:
self._loop = loopingcall.FixedIntervalLoopingCall(self._check_func)
self._loop.start(interval=self._interval,
initial_delay=self._initial_delay)
def wait(self):
if self._loop is not None:
self._loop.wait()
def stop(self):
if self._loop is not None:
self._loop.stop()
def reset(self):
self.stop()
self.wait()
self.start()