def test_delete(self):
b = Queue("foo", self.exchange, "foo", channel=Channel())
b.delete()
self.assertIn("queue_delete", b.channel)
def test_delete(self):
b = Queue("foo", self.exchange, "foo", channel=get_conn().channel())
b.delete()
self.assertIn("queue_delete", b.channel)
def test_delete(self):
b = Queue('foo', self.exchange, 'foo', channel=get_conn().channel())
b.delete()
self.assertIn('queue_delete', b.channel)
def test_delete(self):
b = Queue('foo', self.exchange, 'foo', channel=get_conn().channel())
b.delete()
self.assertIn('queue_delete', b.channel)
def call(self, name, operation, timeout=10, args=None, **kwargs):
"""Send a message and wait for reply
@param name: name of destination service queue
@param operation: name of service operation to invoke
@param timeout: RPC timeout to await a reply
@param args: dictionary of keyword args to pass to operation.
Use this OR kwargs.
@param kwargs: additional args to pass to operation
"""
if args:
if kwargs:
raise TypeError("specify args dict or keyword arguments, not both")
else:
args = kwargs
# create a direct queue for the reply. This may end up being a
# bottleneck for performance: each rpc call gets a brand new
# exclusive queue. However this approach is used nova.rpc and
# seems to have carried them pretty far. If/when this
# becomes a bottleneck we can set up a long-lived backend queue and
# use correlation_id to deal with concurrent RPC calls. See:
# http://www.rabbitmq.com/tutorials/tutorial-six-python.html
msg_id = uuid.uuid4().hex
# expire the reply queue shortly after the timeout. it will be
# (lazily) deleted by the broker if we don't clean it up first
queue_arguments = {'x-expires': int((timeout + 1) * 1000)}
queue = Queue(name=msg_id, exchange=self._exchange, routing_key=msg_id,
durable=False, queue_arguments=queue_arguments)
messages = []
event = threading.Event()
def _callback(body, message):
messages.append(body)
message.ack()
event.set()
d = dict(op=operation, args=args)
headers = {'reply-to': msg_id, 'sender': self.add_sysname(self.name)}
dest = self.add_sysname(name)
def _declare_and_send(channel):
consumer = Consumer(channel, (queue,), callbacks=(_callback,))
with Producer(channel) as producer:
producer.publish(d, routing_key=dest, headers=headers,
exchange=self._exchange, serializer=self._serializer)
return consumer
log.debug("sending call to %s:%s", dest, operation)
with connections[self._pool_conn].acquire(block=True) as conn:
consumer, channel = self.ensure(conn, _declare_and_send)
try:
self._consume(conn, consumer, timeout=timeout, until_event=event)
# try to delete queue, but don't worry if it fails (will expire)
try:
queue = queue.bind(channel)
queue.delete(nowait=True)
except Exception:
log.exception("error deleting queue")
finally:
conn.maybe_close_channel(channel)
msg_body = messages[0]
if msg_body.get('error'):
raise_error(msg_body['error'])
else:
return msg_body.get('result')
