def test_transfer_binary_message_using_file(
producer: ConfluentProducer,
target_topic_consumer: Consumer,
source_topic: Tuple[str, int],
target_topic: Tuple[str, int],
non_interactive_cli_runner: CliRunner,
tmpdir_factory,
):
output_directory = tmpdir_factory.mktemp("output_directory")
expected_messages = produce_binary_test_messages(topic_name=source_topic[0], producer=producer)
non_interactive_cli_runner.invoke(
esque,
args=["consume", "-d", str(output_directory), "--binary", "--number", "10", source_topic[0]],
catch_exceptions=False,
)
non_interactive_cli_runner.invoke(
esque, args=["produce", "-d", str(output_directory), "--binary", target_topic[0]], catch_exceptions=False
)
actual_messages = {
(msg.key(), msg.value(), msg.partition()) for msg in target_topic_consumer.consume(10, timeout=20)
}
expected_messages = {(msg.key, msg.value, msg.partition) for msg in expected_messages}
assert expected_messages == actual_messages
def test_transfer_binary_with_single_command(
producer: ConfluentProducer,
target_topic_consumer: Consumer,
source_topic: Tuple[str, int],
target_topic: Tuple[str, int],
non_interactive_cli_runner: CliRunner,
):
expected_messages = produce_binary_test_messages(topic_name=source_topic[0], producer=producer)
non_interactive_cli_runner.invoke(
esque,
args=[
"transfer",
"--from-topic",
source_topic[0],
"--to-topic",
target_topic[0],
"--binary",
"--number",
"10",
"--first",
],
catch_exceptions=False,
)
actual_messages = {
(msg.key(), msg.value(), msg.partition()) for msg in target_topic_consumer.consume(10, timeout=20)
}
expected_messages = {(msg.key, msg.value, msg.partition) for msg in expected_messages}
assert expected_messages == actual_messages
def get_partitions_with_offsets(broker):
input_consumer = Consumer({
'bootstrap.servers': broker,
'group.id': str(uuid.uuid4()),
'auto.offset.reset': 'earliest',
'enable.auto.commit': True,
'auto.commit.interval.ms': 1000,
'api.version.request': True,
'max.poll.interval.ms': 60000
})
output_consumer = Consumer({
'bootstrap.servers': broker,
'group.id': str(uuid.uuid4()),
'auto.offset.reset': 'earliest',
'enable.auto.commit': True,
'auto.commit.interval.ms': 1000,
'api.version.request': True,
'max.poll.interval.ms': 60000
})
input_consumer.subscribe(['read', 'update', 'transfer'])
output_consumer.subscribe(['responses'])
msgs = input_consumer.consume(timeout=5, num_messages=100)
if len(msgs) == 0:
print("returned empty")
return {}
partitions_with_offsets = {'input': [], 'output': []}
input_partitions = input_consumer.assignment()
for p in input_partitions:
_, h = input_consumer.get_watermark_offsets(p)
p.offset = h
partitions_with_offsets['input'].append(p)
output_consumer.consume(timeout=5, num_messages=100)
output_partitions = output_consumer.assignment()
for p in output_partitions:
_, h = output_consumer.get_watermark_offsets(p)
p.offset = h
partitions_with_offsets['output'].append(p)
return partitions_with_offsets
def consume(self, num_messages=1, *args, **kwargs):
"""
overridden method
:param num_messages:
:param args:
:param kwargs:
:return:
"""
msgs = Consumer.consume(self, num_messages, *args, **kwargs)
for msg in msgs:
if msg is not None:
self.build_and_finish_child_span(msg)
return msgs
def test_transfer_binary_message_using_cli_pipe(
producer: ConfluentProducer,
target_topic_consumer: Consumer,
source_topic: Tuple[str, int],
target_topic: Tuple[str, int],
non_interactive_cli_runner,
):
expected_messages = produce_binary_test_messages(topic_name=source_topic[0], producer=producer)
result1 = non_interactive_cli_runner.invoke(
esque, args=["consume", "--stdout", "--binary", "--number", "10", source_topic[0]], catch_exceptions=False
)
non_interactive_cli_runner.invoke(
esque, args=["produce", "--stdin", "--binary", target_topic[0]], input=result1.output, catch_exceptions=False
)
actual_messages = {
(msg.key(), msg.value(), msg.partition()) for msg in target_topic_consumer.consume(10, timeout=20)
}
expected_messages = {(msg.key, msg.value, msg.partition) for msg in expected_messages}
assert expected_messages == actual_messages
def __consume_msgs(self, num_messages, *args, **kwargs):
return Consumer.consume(self, num_messages, *args, **kwargs)
class MsgConsumer:
def __init__(self,
topic,
broker_address,
group_id='group',
client_id='client',
auto_offset_reset='earliest',
num_messages=1,
verbose=False):
"""Consumer for handling EEG Streamer messages.
Args:
topic: Topic to subscribe to
broker_address: Broker address
group_id: group ID
client_id: client ID
auto_offset_reset: (default: 'earliest')
num_messages: Maximum number of messages to consume each time (default: 1)
verbose: verbose mode. (default: False)
"""
self.data = deque()
self.timestamps = deque()
self.__num_msgs = num_messages
"""Maximum number of messages to consume each time (default: 1)"""
self.__verbose = verbose
self.__streamqueue = deque()
self.__consumer = Consumer({
'bootstrap.servers': broker_address,
'auto.offset.reset': auto_offset_reset,
'group.id': group_id,
'client.id': client_id,
'enable.auto.commit': True,
'session.timeout.ms': 6000,
'max.poll.interval.ms': 10000
})
"""consumer that reads stream of EEG signal"""
self.__consumer.subscribe([topic])
def listen(self):
"""read stream from Kafka and append to streamqueue
Returns:
list of list: dataset (nchannel x nsample) or None
"""
# If chunk size is too large, consume it multiple epochs
chunk_size = self.__num_msgs
msgs = []
while chunk_size > 100:
msgs.extend(self.__consumer.consume(num_messages=100, timeout=1))
chunk_size -= 100
msgs.extend(self.__consumer.consume(num_messages=chunk_size,
timeout=1))
print(f"INFO: Received {str(len(msgs))} messages"
) if self.__verbose else None
if msgs is None or len(msgs) <= 0:
return None
self.__streamqueue.extendleft(msgs) # Enqueue
if len(self.__streamqueue) < self.__num_msgs:
return None
# Dequeue
msgs__ = [self.__streamqueue.pop() for i in range(0, self.__num_msgs)]
timestamps, data = [], []
for msg in msgs__:
time, values = msg_decode(msg.value())
timestamps.append(time) if time is not None else None
data.append(values) if time is not None else None
#TODO:// assert there is not big time gap in the data
if len(data) < self.__num_msgs:
return None
print(timestamps[0], data[0]) if self.__verbose else None
data = tuple(zip(*data))
self.data.append(data)
self.timestamps.append(timestamps[0])
print(f"INFO: Sucessfully Read a chunk") if self.__verbose else None
def stop(self):
self.__consumer.close()
pass
def drain(self):
self.__num_msgs = 100000
for i in range(0, 10):
self.listen()
def consume(self, topic, topic_timeout):
kafka_config_consumer = ConfigFactory(kafka_client="consumer")
config = kafka_config_consumer.config
log.info("kafka config for consume %s", config)
consumer = Consumer(config)
events = []
start_time = time.monotonic()
timeout_start_time = start_time
timeout_consumer = 10.0
# actual consumer starts now
# subscribe to 1 or more topics and define the callback function
# callback is only received after consumer.consume() is called!
consumer.subscribe([topic], on_assign=self.callback_on_assignment)
log.info(
f"Waiting for partition assignment ... (timeout at {timeout_consumer} seconds"
)
try:
while (time.monotonic() - timeout_start_time) < timeout_consumer:
# start consumption
messages = consumer.consume(timeout=0.1)
# check for partition assignment
if self.consume_lock == ConsumerState.PARTITIONS_UNASSIGNED:
# this should not happen but we are not 100% sure
if messages:
log.error("messages consumed but lock is unopened")
break
continue
# after partition assignment set the timeout again
# and reset the start time from which to determine timeout
# violation
elif self.consume_lock == ConsumerState.PARTITIONS_ASSIGNED:
timeout_start_time = time.monotonic()
timeout_consumer = topic_timeout
self.consume_lock = ConsumerState.TIMEOUT_SET
log.info("Lock has been opened, consuming ...")
# appened messages to the events list to be returned
if messages:
for msg in messages:
log.info(f"message at offset: {msg.offset()}, \
partition: {msg.partition()}, \
topic: {msg.topic()}")
# TODO: allow assertions to be on message headers etc.
# events.append({
# "key": msg.key,
# "headers": msg.headers,
# "value": msg.value()
# })
events.append(msg.value())
# only executed when while condition becomes false
else:
# at the end check if the partition assignment was achieved
if self.consume_lock != ConsumerState.TIMEOUT_SET:
log.error("No partition assignments received in time")
except KafkaException as e:
log.error(f"Kafka error: {e}")
pass
finally:
consumer.close()
end_time = time.monotonic()
log.debug(f"this cycle took: {(end_time - start_time)} seconds")
return events
def exec_benchmark(duration_s, fps, kafka_loc, output_topic, silent):
"""Measures throughput at the output Kafka topic,
by checking the growth in all partitions"""
c = Consumer({
'bootstrap.servers': kafka_loc,
'group.id': 'benchmark-' + str(uuid.uuid4()),
'auto.offset.reset': 'latest',
'max.poll.interval.ms': 86400000,
'isolation.level': 'read_committed'
})
# === Get topic partitions
topic_partitions = None
def store_topic_partition(consumer, partitions):
nonlocal topic_partitions
topic_partitions = partitions
c.subscribe([output_topic], on_assign=store_topic_partition)
while topic_partitions is None:
c.consume(timeout=0.5)
#Loop read partitions
throughput_measured = []
throughput_measured_per_partition = {}
last_values = {}
for p in topic_partitions:
low, high = c.get_watermark_offsets(p)
throughput_measured_per_partition[p.partition] = []
last_values[p.partition] = high
#if silent != "silent":
# print("Starting value for partition {}: {}".format(p.partition, high))
MS_PER_UPDATE = 1000 / fps
start_time = current_milli_time()
last_time = start_time
current_time = start_time
last_write_time = current_time
lag = 0.0
while current_time < start_time + duration_s * 1000:
current_time = current_milli_time()
elapsed = current_time - last_time
last_time = current_time
lag += elapsed
while lag >= MS_PER_UPDATE:
#calc new val
total_new = 0
curr_time_for_print = current_milli_time()
time_delta = ((curr_time_for_print - last_write_time) / 1000)
if time_delta > 0:
for p in topic_partitions:
low, high = c.get_watermark_offsets(p)
delta = high - last_values[p.partition]
total_new += delta
throughput_measured_per_partition[p.partition].append(
(delta / time_delta, curr_time_for_print))
last_values[p.partition] = high
throughput_measured.append(
(total_new / time_delta, curr_time_for_print))
last_write_time = curr_time_for_print
lag -= MS_PER_UPDATE
if silent != "silent":
#Print column names
#TIME THROUGHPUT PART-0 ... PART-N
columns = "TIME\tTHROUGHPUT"
for i in range(len(topic_partitions)):
columns += "\tPART-{}".format(str(i))
print(columns)
for row in range(len(throughput_measured)):
row_data = "{}\t{}".format(throughput_measured[row][1],
int(throughput_measured[row][0]))
for i in range(len(topic_partitions)):
row_data += "\t{}".format(
int(throughput_measured_per_partition[i][row][0]))
print(row_data)
else:
print(
int(
statistics.mean(
[x[0] for x in throughput_measured if x[0] > 0.0])))
def compute_achieved_throughput(broker, partitions_with_offsets, result_dict):
partitions_with_offsets = {}
input_consumer = Consumer({
'bootstrap.servers': broker,
'group.id': str(uuid.uuid4()),
# 'group.id': 'achieved_throughput_measurer',
'auto.offset.reset': 'earliest',
'enable.auto.commit': True,
'auto.commit.interval.ms': 1000,
'api.version.request': True,
'max.poll.interval.ms': 60000
})
output_consumer = Consumer({
'bootstrap.servers': broker,
'group.id': str(uuid.uuid4()),
# 'group.id': 'achieved_throughput_measurer',
'auto.offset.reset': 'earliest',
'enable.auto.commit': True,
'auto.commit.interval.ms': 1000,
'api.version.request': True,
'max.poll.interval.ms': 60000
})
if 'input' in partitions_with_offsets and len(
partitions_with_offsets['input']) > 0:
input_consumer.assign(partitions_with_offsets['input'])
else:
input_consumer.subscribe(['read', 'update', 'transfer'])
if 'output' in partitions_with_offsets and len(
partitions_with_offsets['output']) > 0:
output_consumer.assign(partitions_with_offsets['output'])
else:
output_consumer.subscribe(['responses'])
while True:
msgs = input_consumer.consume(timeout=5, num_messages=500)
if len(msgs) == 0:
break
for msg in msgs:
try:
wrapped = Wrapper()
wrapped.ParseFromString(msg.value())
result = {}
result['operation'] = msg.topic()
result['input_time'] = msg.timestamp()[1]
result_dict[wrapped.request_id] = result
except DecodeError as e:
print("Could not decode?")
pass
partitions_with_offsets['input'] = input_consumer.position(
input_consumer.assignment())
input_consumer.close()
total_messages = 0
start_time = 0
end_time = 0
first = True
while True:
msgs = output_consumer.consume(timeout=5, num_messages=500)
if len(msgs) == 0:
break
for msg in msgs:
response = Response()
response.ParseFromString(msg.value())
key = response.request_id
status_code = response.status_code
if key in result_dict:
if first:
start_time = msg.timestamp()[1] / 1000
first = False
total_messages += 1
end_time = msg.timestamp()[1] / 1000
result_dict[key]['output_time'] = msg.timestamp()[1]
result_dict[key]['status_code'] = status_code
partitions_with_offsets['output'] = output_consumer.position(
output_consumer.assignment())
output_consumer.close()
print("Total messages considered: " + str(total_messages))
if total_messages == 0 or end_time - start_time == 0:
return 0
return total_messages / (end_time - start_time)
