The loopingcall code dates back to when openstack projects
maintained common code and was later replaced by oslo.service.
Remove the loopingcall code and replace it with oslo.service
since it has the same method signatures.
Story: 2006796
Task: 42775
Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: I5e4f6edd03049a5d217d6245efa0157e6b5b345b
(cherry picked from commit fbbca13c49)
changes/20/802520/10
Charles Short
2 years ago
committed by
Chuck Short
parent
a47ac91bbc
commit
d20635ff8a
@ -1,147 +0,0 @@
|
||||
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
||||
|
||||
# Copyright 2010 United States Government as represented by the
|
||||
# Administrator of the National Aeronautics and Space Administration.
|
||||
# Copyright 2011 Justin Santa Barbara
|
||||
# All Rights Reserved.
|
||||
#
|
||||
# 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.
|
||||
|
||||
import sys
|
||||
|
||||
from eventlet import event
|
||||
from eventlet import greenthread
|
||||
|
||||
from oslo_log import log as logging
|
||||
from oslo_utils import timeutils
|
||||
from sysinv._i18n import _
|
||||
|
||||
LOG = logging.getLogger(__name__)
|
||||
|
||||
|
||||
class LoopingCallDone(Exception):
|
||||
"""Exception to break out and stop a LoopingCall.
|
||||
|
||||
The poll-function passed to LoopingCall can raise this exception to
|
||||
break out of the loop normally. This is somewhat analogous to
|
||||
StopIteration.
|
||||
|
||||
An optional return-value can be included as the argument to the exception;
|
||||
this return-value will be returned by LoopingCall.wait()
|
||||
|
||||
"""
|
||||
|
||||
def __init__(self, retvalue=True):
|
||||
""":param retvalue: Value that LoopingCall.wait() should return."""
|
||||
self.retvalue = retvalue
|
||||
|
||||
|
||||
class LoopingCallBase(object):
|
||||
def __init__(self, f=None, *args, **kw):
|
||||
self.args = args
|
||||
self.kw = kw
|
||||
self.f = f
|
||||
self._running = False
|
||||
self.done = None
|
||||
|
||||
def stop(self):
|
||||
self._running = False
|
||||
|
||||
def wait(self):
|
||||
return self.done.wait()
|
||||
|
||||
|
||||
class FixedIntervalLoopingCall(LoopingCallBase):
|
||||
"""A fixed interval looping call."""
|
||||
|
||||
def start(self, interval, initial_delay=None):
|
||||
self._running = True
|
||||
done = event.Event()
|
||||
|
||||
def _inner():
|
||||
if initial_delay:
|
||||
greenthread.sleep(initial_delay)
|
||||
|
||||
try:
|
||||
while self._running:
|
||||
start = timeutils.utcnow()
|
||||
self.f(*self.args, **self.kw)
|
||||
end = timeutils.utcnow()
|
||||
if not self._running:
|
||||
break
|
||||
delay = interval - timeutils.delta_seconds(start, end)
|
||||
if delay <= 0:
|
||||
LOG.warn(_('task run outlasted interval by %s sec') %
|
||||
(-delay,))
|
||||
greenthread.sleep(delay if delay > 0 else 0)
|
||||
except LoopingCallDone as e:
|
||||
self.stop()
|
||||
done.send(e.retvalue)
|
||||
except Exception:
|
||||
LOG.exception(_('in fixed duration looping call'))
|
||||
done.send_exception(*sys.exc_info())
|
||||
return
|
||||
else:
|
||||
done.send(True)
|
||||
|
||||
self.done = done
|
||||
|
||||
greenthread.spawn_n(_inner)
|
||||
return self.done
|
||||
|
||||
|
||||
# TODO(mikal): this class name is deprecated in Havana and should be removed
|
||||
# in the I release
|
||||
LoopingCall = FixedIntervalLoopingCall
|
||||
|
||||
|
||||
class DynamicLoopingCall(LoopingCallBase):
|
||||
"""A looping call which sleeps until the next known event.
|
||||
|
||||
The function called should return how long to sleep for before being
|
||||
called again.
|
||||
"""
|
||||
|
||||
def start(self, initial_delay=None, periodic_interval_max=None):
|
||||
self._running = True
|
||||
done = event.Event()
|
||||
|
||||
def _inner():
|
||||
if initial_delay:
|
||||
greenthread.sleep(initial_delay)
|
||||
|
||||
try:
|
||||
while self._running:
|
||||
idle = self.f(*self.args, **self.kw)
|
||||
if not self._running:
|
||||
break
|
||||
|
||||
if periodic_interval_max is not None:
|
||||
idle = min(idle, periodic_interval_max)
|
||||
LOG.debug(_('Dynamic looping call sleeping for %.02f '
|
||||
'seconds'), idle)
|
||||
greenthread.sleep(idle)
|
||||
except LoopingCallDone as e:
|
||||
self.stop()
|
||||
done.send(e.retvalue)
|
||||
except Exception:
|
||||
LOG.exception(_('in dynamic looping call'))
|
||||
done.send_exception(*sys.exc_info())
|
||||
return
|
||||
else:
|
||||
done.send(True)
|
||||
|
||||
self.done = done
|
||||
|
||||
greenthread.spawn(_inner)
|
||||
return self.done
|
||||
Loading…
Reference in new issue