def _redis_master(self):
try:
if not self._master:
self._master = self._sentinel.master_for(self._master_group)
return self._master
except redis_sentinel.MasterNotFoundError:
raise zmq_matchmaker_base.MatchmakerUnavailable()
def acquire_connection(self, request):
if not self.publishers:
raise zmq_matchmaker_base.MatchmakerUnavailable()
socket = self.sockets_manager.get_socket()
publishers = list(self.publishers)
random.shuffle(publishers)
for publisher in publishers:
socket.connect_to_host(publisher)
return socket
def func_wrapper(*args, **kwargs):
try:
return func(*args, **kwargs)
except redis.ConnectionError:
LOG.warning(_LW("Redis is currently not available. "
"Messages are being sent to known targets using "
"existing connections. But new nodes "
"can not be discovered until Redis is up "
"and running."))
raise zmq_matchmaker_base.MatchmakerUnavailable()
def func_wrapper(self, *args, **kwargs):
# try to perform a read operation from any available and ready host
for redis_instance in self._redis_instances:
if not redis_instance._is_available \
or redis_instance._ready_from > time.time():
continue
try:
return func(self, redis_instance, *args, **kwargs)
except redis.ConnectionError:
LOG.warning(_LW("Redis host %s is not available now."),
redis_instance._address)
redis_instance._is_available = False
redis_instance._ready_from = float("inf")
raise zmq_matchmaker_base.MatchmakerUnavailable()
def func_wrapper(self, *args, **kwargs):
# try to perform a write operation to all available hosts
success = False
for redis_instance in self._redis_instances:
if not redis_instance._is_available:
continue
try:
func(self, redis_instance, *args, **kwargs)
success = True
except redis.ConnectionError:
LOG.warning(_LW("Redis host %s is not available now."),
redis_instance._address)
redis_instance._is_available = False
redis_instance._ready_from = float("inf")
if not success:
raise zmq_matchmaker_base.MatchmakerUnavailable()
def acquire_connection(self, request):
if not self.publishers:
raise zmq_matchmaker_base.MatchmakerUnavailable()
socket = self.sockets_manager.get_socket()
socket.connect_to_host(random.choice(tuple(self.publishers)))
return socket