def test_get_connection(rabbit_config):
amqp_uri = rabbit_config['AMQP_URI']
connection_ids = []
with get_connection(amqp_uri) as connection:
connection_ids.append(id(connection))
assert isinstance(connection, Connection)
with get_connection(amqp_uri) as connection:
connection_ids.append(id(connection))
assert len(set(connection_ids)) == 1
def setup(self):
exchange = self.exchange
queue = self.queue
verify_amqp_uri(self.amqp_uri)
with get_connection(self.amqp_uri) as conn:
if queue is not None:
maybe_declare(queue, conn)
elif exchange is not None:
maybe_declare(exchange, conn)
def get(queue_name, ack=True, block=True, timeout=1, accept=None):
with get_connection(amqp_uri) as conn:
queue = conn.SimpleQueue(queue_name)
# queue doesn't allow passing of `accept` to its consumer,
# so we patch it on after instantiation
if accept is not None:
queue.consumer.accept = accept
message = queue.get(block=block, timeout=timeout)
if ack:
message.ack()
else:
message.requeue()
queue.close()
return message
def get(queue_name, ack=True, block=True, timeout=1, accept=None):
with get_connection(amqp_uri) as conn:
queue = conn.SimpleQueue(queue_name)
# queue doesn't allow passing of `accept` to its consumer,
# so we patch it on after instantiation
if accept is not None:
queue.consumer.accept = accept
message = queue.get(block=block, timeout=timeout)
if ack:
message.ack()
else:
message.requeue()
queue.close()
return message
def setup(self):
super(ReplyConsumer, self).setup()
config = self.container.config
"""Declare consumer queue for this service in current region"""
self.queue = Queue(
exchange=orders_exchange,
routing_key='{}_{}'.format(config['REGION'],
ROUTING_KEY_CALCULATE_TAXES),
name='fed.{}_{}'.format(config['REGION'],
ROUTING_KEY_CALCULATE_TAXES))
"""Bind federated queues in all regions to
`orders` exchange with correct routing key.
"""
with get_connection(config[AMQP_URI_CONFIG_KEY]) as connection:
maybe_declare(orders_exchange, connection)
self._bind_queues_in_for_all_regions(ROUTING_KEY_CALCULATE_TAXES,
connection)
self._bind_queues_in_for_all_regions(
ROUTING_KEY_CALCULATE_TAXES_REPLY, connection)
def dispatch(service_name, event_type, event_data):
""" Dispatch an event claiming to originate from `service_name` with
the given `event_type` and `event_data`.
"""
serializer = nameko_config.get(SERIALIZER_CONFIG_KEY,
DEFAULT_SERIALIZER)
exchange = get_event_exchange(service_name)
with get_connection(amqp_uri) as connection:
exchange.maybe_bind(connection) # TODO: reqd? maybe_declare?
with get_producer(amqp_uri, use_confirms) as producer:
msg = event_data
routing_key = event_type
producer.publish(msg,
exchange=exchange,
serializer=serializer,
routing_key=routing_key,
retry=retry,
retry_policy=retry_policy,
mandatory=mandatory,
**kwargs)
if mandatory:
if not use_confirms:
warnings.warn(
"Mandatory delivery was requested, but "
"unroutable messages cannot be detected without "
"publish confirms enabled.")
try:
returned_messages = producer.channel.returned_messages
returned = returned_messages.get_nowait()
except queue.Empty:
pass
else:
raise UndeliverableMessage(returned)
def _create_exchange(self) -> None:
with get_connection(self._dispatcher.amqp_uri) as connection:
exchange = get_event_exchange(self._name)
exchange.maybe_bind(connection)
exchange.declare()
