def test_metrics():
queue = TopicQueue("test_metrics")
k = ("topic", queue.topic)
# Initial metrics are zeroed
metrics = {"other": 1}
queue.apply_metrics(metrics)
assert metrics.get("other") == 1 # Untouched
assert metrics.get(("nsq_msg_put", k)) == 0
assert metrics.get(("nsq_msg_put_size", k)) == 0
assert metrics.get(("nsq_msg_get", k)) == 0
assert metrics.get(("nsq_msg_get_size", k)) == 0
assert metrics.get(("nsq_msg_requeued", k)) == 0
assert metrics.get(("nsq_msg_requeued_size", k)) == 0
# Put 100 messages of 10 octets each
for i in range(100):
msg = "%10d" % i
queue.put(msg)
queue.apply_metrics(metrics)
assert metrics.get("other") == 1 # Untouched
assert metrics.get(("nsq_msg_put", k)) == 100
assert metrics.get(("nsq_msg_put_size", k)) == 1000
assert metrics.get(("nsq_msg_get", k)) == 0
assert metrics.get(("nsq_msg_get_size", k)) == 0
assert metrics.get(("nsq_msg_requeued", k)) == 0
assert metrics.get(("nsq_msg_requeued_size", k)) == 0
# Get 50 messages of 10 octets each
msgs = list(queue.iter_get(50))
queue.apply_metrics(metrics)
assert metrics.get("other") == 1 # Untouched
assert metrics.get(("nsq_msg_put", k)) == 100
assert metrics.get(("nsq_msg_put_size", k)) == 1000
assert metrics.get(("nsq_msg_get", k)) == 50
assert metrics.get(("nsq_msg_get_size", k)) == 500
assert metrics.get(("nsq_msg_requeued", k)) == 0
assert metrics.get(("nsq_msg_requeued_size", k)) == 0
# Return 10 messages back to queue
queue.return_messages(msgs[:10])
queue.apply_metrics(metrics)
assert metrics.get("other") == 1 # Untouched
assert metrics.get(("nsq_msg_put", k)) == 100
assert metrics.get(("nsq_msg_put_size", k)) == 1000
assert metrics.get(("nsq_msg_get", k)) == 50
assert metrics.get(("nsq_msg_get_size", k)) == 500
assert metrics.get(("nsq_msg_requeued", k)) == 10
assert metrics.get(("nsq_msg_requeued_size", k)) == 100
# Get 60 messages (50 left + 10 returned)
list(queue.iter_get(60))
queue.apply_metrics(metrics)
assert metrics.get("other") == 1 # Untouched
assert metrics.get(("nsq_msg_put", k)) == 100
assert metrics.get(("nsq_msg_put_size", k)) == 1000
assert metrics.get(("nsq_msg_get", k)) == 110
assert metrics.get(("nsq_msg_get_size", k)) == 1100
assert metrics.get(("nsq_msg_requeued", k)) == 10
assert metrics.get(("nsq_msg_requeued_size", k)) == 100
def test_shutdown():
queue = TopicQueue("test_shutdown")
# Fill queue with 10 items
to_produce = ["%04d" % i for i in range(10)]
for msg in to_produce:
queue.put(msg)
# Consume 5 of them
consumed = []
consumed += list(queue.iter_get(5))
# Shutdown the queue
queue.shutdown()
# Try to shutdown queue twice, raise Runtime error
with pytest.raises(RuntimeError):
queue.shutdown()
# Try to put an item, raise Runtime error
with pytest.raises(RuntimeError):
queue.put("9999")
# Try to return a message, raise Runtime error
with pytest.raises(RuntimeError):
queue.return_messages(["9999"])
# Consume all other items
consumed += list(queue.iter_get(10))
# Check all items are consumed
assert to_produce == consumed
async def nsq_publisher(self, queue: TopicQueue):
"""
Publisher for NSQ topic
:return:
"""
topic = queue.topic
self.logger.info("[nsq|%s] Starting NSQ publisher", topic)
while not queue.to_shutdown or not queue.is_empty():
# Message throttling. Wait and allow to collect more messages
await queue.wait(timeout=10, rate=config.nsqd.topic_mpub_rate)
# Get next batch up to `mpub_messages` messages or up to `mpub_size` size
messages = list(
queue.iter_get(
n=config.nsqd.mpub_messages,
size=config.nsqd.mpub_size,
total_overhead=4,
message_overhead=4,
)
)
if not messages:
continue
try:
self.logger.debug("[nsq|%s] Publishing %d messages", topic, len(messages))
await mpub(topic, messages, dcs=self.dcs)
except NSQPubError:
if queue.to_shutdown:
self.logger.debug(
"[nsq|%s] Failed to publish during shutdown. Dropping messages", topic
)
else:
# Return to queue
self.logger.info(
"[nsq|%s] Failed to publish. %d messages returned to queue",
topic,
len(messages),
)
queue.return_messages(messages)
del messages # Release memory
self.logger.info("[nsq|%s] Stopping NSQ publisher", topic)
# Queue is shut down and empty, notify
queue.notify_shutdown()
def test_qsize():
queue = TopicQueue("test_qsize")
# Empty queue
assert queue.qsize() == (0, 0)
qn = 0
qs = 0
# Put
for i in range(10):
msg = "x" * (i + 1)
qs += len(msg)
qn += 1
queue.put(msg)
assert queue.qsize() == (qn, qs)
# Pull
while qn > 0:
msg = list(queue.iter_get())[0]
qn -= 1
qs -= len(msg)
assert queue.qsize() == (qn, qs)
# Empty queue
assert queue.qsize() == (0, 0)
def test_get_limit(input, get_kwargs, expected):
queue = TopicQueue("test_get_limit")
for msg in input:
queue.put(msg)
result = list(queue.iter_get(**get_kwargs))
assert result == expected
def test_put_order(put_kwargs, expected):
queue = TopicQueue("test_put_order")
for kw in put_kwargs:
queue.put(**kw)
result = list(queue.iter_get(len(put_kwargs)))
assert result == expected
