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import unittest
from datetime import datetime
from kafka import * # noqa
from kafka.common import * # noqa
from kafka.consumer import MAX_FETCH_BUFFER_SIZE_BYTES
from .fixtures import ZookeeperFixture, KafkaFixture
from .testutil import *
@unittest.skipIf(skip_integration(), 'Skipping Integration')
class TestConsumerIntegration(KafkaIntegrationTestCase):
@classmethod
def setUpClass(cls):
cls.zk = ZookeeperFixture.instance()
cls.server1 = KafkaFixture.instance(0, cls.zk.host, cls.zk.port)
cls.server2 = KafkaFixture.instance(1, cls.zk.host, cls.zk.port)
cls.server = cls.server1 # Bootstrapping server
@classmethod
def tearDownClass(cls): # noqa
cls.server1.close()
cls.server2.close()
cls.zk.close()
def send_messages(self, partition, messages):
messages = [ create_message(self.msg(str(msg))) for msg in messages ]
produce = ProduceRequest(self.topic, partition, messages = messages)
resp, = self.client.send_produce_request([produce])
self.assertEquals(resp.error, 0)
return [ x.value for x in messages ]
def assert_message_count(self, messages, num_messages):
# Make sure we got them all
self.assertEquals(len(messages), num_messages)
# Make sure there are no duplicates
self.assertEquals(len(set(messages)), num_messages)
def test_simple_consumer(self):
self.send_messages(0, range(0, 100))
self.send_messages(1, range(100, 200))
# Start a consumer
consumer = SimpleConsumer(self.client, "group1",
self.topic, auto_commit=False,
iter_timeout=0)
self.assert_message_count([ message for message in consumer ], 200)
consumer.stop()
def test_simple_consumer__seek(self):
self.send_messages(0, range(0, 100))
self.send_messages(1, range(100, 200))
consumer = SimpleConsumer(self.client, "group1",
self.topic, auto_commit=False,
iter_timeout=0)
# Rewind 10 messages from the end
consumer.seek(-10, 2)
self.assert_message_count([ message for message in consumer ], 10)
# Rewind 13 messages from the end
consumer.seek(-13, 2)
self.assert_message_count([ message for message in consumer ], 13)
consumer.stop()
def test_simple_consumer_blocking(self):
consumer = SimpleConsumer(self.client, "group1",
self.topic,
auto_commit=False, iter_timeout=0)
# Ask for 5 messages, nothing in queue, block 5 seconds
with Timer() as t:
messages = consumer.get_messages(block=True, timeout=5)
self.assert_message_count(messages, 0)
self.assertGreaterEqual(t.interval, 5)
self.send_messages(0, range(0, 10))
# Ask for 5 messages, 10 in queue. Get 5 back, no blocking
with Timer() as t:
messages = consumer.get_messages(count=5, block=True, timeout=5)
self.assert_message_count(messages, 5)
self.assertLessEqual(t.interval, 1)
# Ask for 10 messages, get 5 back, block 5 seconds
with Timer() as t:
messages = consumer.get_messages(count=10, block=True, timeout=5)
self.assert_message_count(messages, 5)
self.assertGreaterEqual(t.interval, 5)
consumer.stop()
def test_simple_consumer_pending(self):
# Produce 10 messages to partitions 0 and 1
self.send_messages(0, range(0, 10))
self.send_messages(1, range(10, 20))
consumer = SimpleConsumer(self.client, "group1", self.topic,
auto_commit=False, iter_timeout=0)
self.assertEquals(consumer.pending(), 20)
self.assertEquals(consumer.pending(partitions=[0]), 10)
self.assertEquals(consumer.pending(partitions=[1]), 10)
consumer.stop()
def test_multi_process_consumer(self):
# Produce 100 messages to partitions 0 and 1
self.send_messages(0, range(0, 100))
self.send_messages(1, range(100, 200))
consumer = MultiProcessConsumer(self.client, "grp1", self.topic, auto_commit=False)
self.assert_message_count([ message for message in consumer ], 200)
consumer.stop()
def test_multi_process_consumer_blocking(self):
consumer = MultiProcessConsumer(self.client, "grp1", self.topic, auto_commit=False)
# Ask for 5 messages, No messages in queue, block 5 seconds
with Timer() as t:
messages = consumer.get_messages(block=True, timeout=5)
self.assert_message_count(messages, 0)
self.assertGreaterEqual(t.interval, 5)
# Send 10 messages
self.send_messages(0, range(0, 10))
# Ask for 5 messages, 10 messages in queue, block 0 seconds
with Timer() as t:
messages = consumer.get_messages(count=5, block=True, timeout=5)
self.assert_message_count(messages, 5)
self.assertLessEqual(t.interval, 1)
# Ask for 10 messages, 5 in queue, block 5 seconds
with Timer() as t:
messages = consumer.get_messages(count=10, block=True, timeout=5)
self.assert_message_count(messages, 5)
self.assertGreaterEqual(t.interval, 5)
consumer.stop()
def test_multi_proc_pending(self):
self.send_messages(0, range(0, 10))
self.send_messages(1, range(10, 20))
consumer = MultiProcessConsumer(self.client, "group1", self.topic, auto_commit=False)
self.assertEquals(consumer.pending(), 20)
self.assertEquals(consumer.pending(partitions=[0]), 10)
self.assertEquals(consumer.pending(partitions=[1]), 10)
consumer.stop()
def test_large_messages(self):
# Produce 10 "normal" size messages
small_messages = self.send_messages(0, [ str(x) for x in range(10) ])
# Produce 10 messages that are large (bigger than default fetch size)
large_messages = self.send_messages(0, [ random_string(5000) for x in range(10) ])
# Consumer should still get all of them
consumer = SimpleConsumer(self.client, "group1", self.topic,
auto_commit=False, iter_timeout=0)
expected_messages = set(small_messages + large_messages)
actual_messages = set([ x.message.value for x in consumer ])
self.assertEqual(expected_messages, actual_messages)
consumer.stop()
def test_huge_messages(self):
huge_message, = self.send_messages(0, [
create_message(random_string(MAX_FETCH_BUFFER_SIZE_BYTES + 10)),
])
# Create a consumer with the default buffer size
consumer = SimpleConsumer(self.client, "group1", self.topic,
auto_commit=False, iter_timeout=0)
# This consumer failes to get the message
with self.assertRaises(ConsumerFetchSizeTooSmall):
consumer.get_message(False, 0.1)
consumer.stop()
# Create a consumer with no fetch size limit
big_consumer = SimpleConsumer(self.client, "group1", self.topic,
max_buffer_size=None, partitions=[0],
auto_commit=False, iter_timeout=0)
# Seek to the last message
big_consumer.seek(-1, 2)
# Consume giant message successfully
message = big_consumer.get_message(block=False, timeout=10)
self.assertIsNotNone(message)
self.assertEquals(message.message.value, huge_message)
big_consumer.stop()
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