def start_consumers(self, msg_runner):
"""Start RPC consumers.
Start up 2 separate consumers for handling inter-cell
communication via RPC. Both handle the same types of
messages, but requests/replies are separated to solve
potential deadlocks. (If we used the same queue for both,
it's possible to exhaust the RPC thread pool while we wait
for replies.. such that we'd never consume a reply.)
"""
topic_base = CONF.cells.rpc_driver_queue_base
proxy_manager = InterCellRPCDispatcher(msg_runner)
# NOTE(comstud): We do not need to use the object serializer
# on this because object serialization is taken care for us in
# the messaging module.
dispatcher = rpc_dispatcher.RpcDispatcher([proxy_manager])
for msg_type in msg_runner.get_message_types():
topic = '%s.%s' % (topic_base, msg_type)
self._start_consumer(dispatcher, topic)
def start(self):
super(Service, self).start()
self.conn = rpc.create_connection(new=True)
LOG.debug(_("Creating Consumer connection for Service %s") %
self.topic)
dispatcher = rpc_dispatcher.RpcDispatcher([self.manager])
# Share this same connection for these Consumers
self.conn.create_consumer(self.topic, dispatcher, fanout=False)
node_topic = '%s.%s' % (self.topic, self.host)
self.conn.create_consumer(node_topic, dispatcher, fanout=False)
self.conn.create_consumer(self.topic, dispatcher, fanout=True)
# Consume from all consumers in a thread
self.conn.consume_in_thread()
def start(self):
super(Service, self).start()
self.conn = rpc.create_connection(new=True)
LOG.debug(
_("Creating Consumer connection for Service %s") % self.topic)
dispatcher = rpc_dispatcher.RpcDispatcher([self.manager])
# Share this same connection for these Consumers
self.conn.create_consumer(self.topic, dispatcher, fanout=False)
node_topic = '%s.%s' % (self.topic, self.host)
self.conn.create_consumer(node_topic, dispatcher, fanout=False)
self.conn.create_consumer(self.topic, dispatcher, fanout=True)
# Hook to allow the manager to do other initializations after
# the rpc connection is created.
if callable(getattr(self.manager, 'initialize_service_hook', None)):
self.manager.initialize_service_hook(self)
# Consume from all consumers in a thread
self.conn.consume_in_thread()