Remove unused openstack.common.loopingcall

loopingcall was included in the original copy from Ironic and isn't
used anymore.

Change-Id: Ie29af06217f7cf293e7655e0669f66e89f1be0d2

openstack-common.conf

@@ -14,7 +14,6 @@ module=local
 module=lockutils
 module=log
 module=log_handler
-module=loopingcall
 module=network_utils
 module=policy
 module=strutils

tuskar/openstack/common/loopingcall.py

@@ -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 tuskar.openstack.common.gettextutils import _
-from tuskar.openstack.common import log as logging
-from tuskar.openstack.common import timeutils
-
-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