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import operator
import os
import socket
import time
import uuid
import decorator
import pytest
from . import unittest
from kafka import SimpleClient, create_message
from kafka.errors import LeaderNotAvailableError, KafkaTimeoutError, InvalidTopicError
from kafka.structs import OffsetRequestPayload, ProduceRequestPayload, \
NotLeaderForPartitionError, UnknownTopicOrPartitionError, \
FailedPayloadsError
from test.fixtures import random_string, version_str_to_list, version as kafka_version #pylint: disable=wrong-import-order
def kafka_versions(*versions):
def construct_lambda(s):
if s[0].isdigit():
op_str = '='
v_str = s
elif s[1].isdigit():
op_str = s[0] # ! < > =
v_str = s[1:]
elif s[2].isdigit():
op_str = s[0:2] # >= <=
v_str = s[2:]
else:
raise ValueError('Unrecognized kafka version / operator: %s' % s)
op_map = {
'=': operator.eq,
'!': operator.ne,
'>': operator.gt,
'<': operator.lt,
'>=': operator.ge,
'<=': operator.le
}
op = op_map[op_str]
version = version_str_to_list(v_str)
return lambda a: op(a, version)
validators = map(construct_lambda, versions)
def real_kafka_versions(func):
def wrapper(func, *args, **kwargs):
version = kafka_version()
if not version:
pytest.skip("no kafka version set in KAFKA_VERSION env var")
for f in validators:
if not f(version):
pytest.skip("unsupported kafka version")
return func(*args, **kwargs)
return decorator.decorator(wrapper, func)
return real_kafka_versions
def get_open_port():
sock = socket.socket()
sock.bind(("", 0))
port = sock.getsockname()[1]
sock.close()
return port
_MESSAGES = {}
def msg(message):
"""Format, encode and deduplicate a message
"""
global _MESSAGES #pylint: disable=global-statement
if message not in _MESSAGES:
_MESSAGES[message] = '%s-%s' % (message, str(uuid.uuid4()))
return _MESSAGES[message].encode('utf-8')
def send_messages(client, topic, partition, messages):
"""Send messages to a topic's partition
"""
messages = [create_message(msg(str(m))) for m in messages]
produce = ProduceRequestPayload(topic, partition, messages=messages)
resp, = client.send_produce_request([produce])
assert resp.error == 0
return [x.value for x in messages]
def current_offset(client, topic, partition, kafka_broker=None):
"""Get the current offset of a topic's partition
"""
try:
offsets, = client.send_offset_request([OffsetRequestPayload(topic,
partition, -1, 1)])
except Exception:
# XXX: We've seen some UnknownErrors here and can't debug w/o server logs
if kafka_broker:
kafka_broker.dump_logs()
raise
else:
return offsets.offsets[0]
class KafkaIntegrationTestCase(unittest.TestCase):
create_client = True
topic = None
zk = None
server = None
def setUp(self):
super(KafkaIntegrationTestCase, self).setUp()
if not os.environ.get('KAFKA_VERSION'):
self.skipTest('Integration test requires KAFKA_VERSION')
if not self.topic:
topic = "%s-%s" % (self.id()[self.id().rindex(".") + 1:], random_string(10))
self.topic = topic
if self.create_client:
self.client = SimpleClient('%s:%d' % (self.server.host, self.server.port))
timeout = time.time() + 30
while time.time() < timeout:
try:
self.client.load_metadata_for_topics(self.topic, ignore_leadernotavailable=False)
if self.client.has_metadata_for_topic(topic):
break
except (LeaderNotAvailableError, InvalidTopicError):
time.sleep(1)
else:
raise KafkaTimeoutError('Timeout loading topic metadata!')
# Ensure topic partitions have been created on all brokers to avoid UnknownPartitionErrors
# TODO: It might be a good idea to move this to self.client.ensure_topic_exists
for partition in self.client.get_partition_ids_for_topic(self.topic):
while True:
try:
req = OffsetRequestPayload(self.topic, partition, -1, 100)
self.client.send_offset_request([req])
break
except (NotLeaderForPartitionError, UnknownTopicOrPartitionError, FailedPayloadsError) as e:
if time.time() > timeout:
raise KafkaTimeoutError('Timeout loading topic metadata!')
time.sleep(.1)
self._messages = {}
def tearDown(self):
super(KafkaIntegrationTestCase, self).tearDown()
if not os.environ.get('KAFKA_VERSION'):
return
if self.create_client:
self.client.close()
def current_offset(self, topic, partition):
try:
offsets, = self.client.send_offset_request([OffsetRequestPayload(topic,
partition, -1, 1)])
except Exception:
# XXX: We've seen some UnknownErrors here and can't debug w/o server logs
self.zk.child.dump_logs()
self.server.child.dump_logs()
raise
else:
return offsets.offsets[0]
def msgs(self, iterable):
return [self.msg(x) for x in iterable]
def msg(self, s):
if s not in self._messages:
self._messages[s] = '%s-%s-%s' % (s, self.id(), str(uuid.uuid4()))
return self._messages[s].encode('utf-8')
def key(self, k):
return k.encode('utf-8')
class Timer(object):
def __enter__(self):
self.start = time.time()
return self
def __exit__(self, *args):
self.end = time.time()
self.interval = self.end - self.start
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