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from __future__ import absolute_import
import os
import random
import string
import time
import uuid
import pytest
from . import unittest
from kafka import SimpleClient
from kafka.errors import (
LeaderNotAvailableError, KafkaTimeoutError, InvalidTopicError,
NotLeaderForPartitionError, UnknownTopicOrPartitionError,
FailedPayloadsError
)
from kafka.structs import OffsetRequestPayload
def random_string(length):
return "".join(random.choice(string.ascii_letters) for i in range(length))
def env_kafka_version():
"""Return the Kafka version set in the OS environment as a tuple.
Example: '0.8.1.1' --> (0, 8, 1, 1)
"""
if 'KAFKA_VERSION' not in os.environ:
return ()
return tuple(map(int, os.environ['KAFKA_VERSION'].split('.')))
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]
def assert_message_count(messages, num_messages):
"""Check that we received the expected number of messages with no duplicates."""
# Make sure we got them all
assert len(messages) == num_messages
# Make sure there are no duplicates
# Note: Currently duplicates are identified only using key/value. Other attributes like topic, partition, headers,
# timestamp, etc are ignored... this could be changed if necessary, but will be more tolerant of dupes.
unique_messages = {(m.key, m.value) for m in messages}
assert len(unique_messages) == num_messages
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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