def start(self):
super(RpcService, self).start()
# TODO(hub-cap): Currently the context is none... do we _need_ it here?
pulse = loopingcall.FixedIntervalLoopingCall(
self.manager_impl.run_periodic_tasks, context=None)
pulse.start(interval=self.report_interval,
initial_delay=self.report_interval)
pulse.wait()
def add_timer(self,
interval,
callback,
initial_delay=None,
*args,
**kwargs):
pulse = loopingcall.FixedIntervalLoopingCall(callback, *args, **kwargs)
pulse.start(interval=interval, initial_delay=initial_delay)
self.timers.append(pulse)
def start(self):
LOG.debug("Creating RPC server for service %s", self.topic)
target = messaging.Target(topic=self.topic,
server=self.host,
version=self.rpc_api_version)
if not hasattr(self.manager_impl, 'target'):
self.manager_impl.target = target
endpoints = [self.manager_impl]
self.rpcserver = rpc.get_server(target, endpoints)
self.rpcserver.start()
# TODO(hub-cap): Currently the context is none... do we _need_ it here?
if self.report_interval > 0:
pulse = loopingcall.FixedIntervalLoopingCall(
self.manager_impl.run_periodic_tasks, context=None)
pulse.start(interval=self.report_interval,
initial_delay=self.report_interval)
pulse.wait()
def poll_until(retriever,
condition=lambda value: value,
sleep_time=1,
time_out=None):
"""Retrieves object until it passes condition, then returns it.
If time_out_limit is passed in, PollTimeOut will be raised once that
amount of time is eclipsed.
"""
start_time = time.time()
def poll_and_check():
obj = retriever()
if condition(obj):
raise loopingcall.LoopingCallDone(retvalue=obj)
if time_out is not None and time.time() - start_time > time_out:
raise exception.PollTimeOut
lc = loopingcall.FixedIntervalLoopingCall(f=poll_and_check).start(
sleep_time, True)
return lc.wait()