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# -*- coding: utf-8 -*-
import time
import logging
from mock import MagicMock
from . import unittest
from kafka.common import TopicAndPartition, FailedPayloadsError
from kafka.producer.base import Producer
from kafka.producer.base import _send_upstream
from kafka.protocol import CODEC_NONE
import threading
import multiprocessing as mp
try:
from queue import Empty
except ImportError:
from Queue import Empty
class TestKafkaProducer(unittest.TestCase):
def test_producer_message_types(self):
producer = Producer(MagicMock())
topic = b"test-topic"
partition = 0
bad_data_types = (u'你怎么样?', 12, ['a', 'list'], ('a', 'tuple'), {'a': 'dict'})
for m in bad_data_types:
with self.assertRaises(TypeError):
logging.debug("attempting to send message of type %s", type(m))
producer.send_messages(topic, partition, m)
good_data_types = (b'a string!',)
for m in good_data_types:
# This should not raise an exception
producer.send_messages(topic, partition, m)
def test_topic_message_types(self):
from kafka.producer.simple import SimpleProducer
client = MagicMock()
def partitions(topic):
return [0, 1]
client.get_partition_ids_for_topic = partitions
producer = SimpleProducer(client, random_start=False)
topic = b"test-topic"
producer.send_messages(topic, b'hi')
assert client.send_produce_request.called
class TestKafkaProducerSendUpstream(unittest.TestCase):
def setUp(self):
# create a multiprocessing Value to store call counter
# (magicmock counters don't work with other processes)
self.send_calls_count = mp.Value('i', 0)
def send_side_effect(*args, **kwargs):
self.send_calls_count.value += 1
self.client = MagicMock()
self.client.send_produce_request.side_effect = send_side_effect
self.queue = mp.Queue()
def _run_process(self, retries_limit=3, sleep_timeout=1):
# run _send_upstream process with the queue
self.process = mp.Process(
target=_send_upstream,
args=(self.queue, self.client, CODEC_NONE,
0.3, # batch time (seconds)
3, # batch length
Producer.ACK_AFTER_LOCAL_WRITE,
Producer.DEFAULT_ACK_TIMEOUT,
50, # retry backoff (ms)
retries_limit))
self.process.daemon = True
self.process.start()
time.sleep(sleep_timeout)
self.process.terminate()
def test_wo_retries(self):
# lets create a queue and add 10 messages for 1 partition
for i in range(10):
self.queue.put((TopicAndPartition("test", 0), "msg %i", "key %i"))
self._run_process()
# the queue should be void at the end of the test
self.assertEqual(self.queue.empty(), True)
# there should be 4 non-void cals:
# 3 batches of 3 msgs each + 1 batch of 1 message
self.assertEqual(self.send_calls_count.value, 4)
def test_first_send_failed(self):
# lets create a queue and add 10 messages for 10 different partitions
# to show how retries should work ideally
for i in range(10):
self.queue.put((TopicAndPartition("test", i), "msg %i", "key %i"))
is_first_time = mp.Value('b', True)
def send_side_effect(reqs, *args, **kwargs):
self.send_calls_count.value += 1
if is_first_time.value:
is_first_time.value = False
raise FailedPayloadsError(reqs)
self.client.send_produce_request.side_effect = send_side_effect
self._run_process(2)
# the queue should be void at the end of the test
self.assertEqual(self.queue.empty(), True)
# there should be 5 non-void cals: 1st failed batch of 3 msgs
# + 3 batches of 3 msgs each + 1 batch of 1 msg = 1 + 3 + 1 = 5
self.assertEqual(self.send_calls_count.value, 5)
def test_with_limited_retries(self):
# lets create a queue and add 10 messages for 10 different partitions
# to show how retries should work ideally
for i in range(10):
self.queue.put((TopicAndPartition("test", i), "msg %i", "key %i"))
def send_side_effect(reqs, *args, **kwargs):
self.send_calls_count.value += 1
raise FailedPayloadsError(reqs)
self.client.send_produce_request.side_effect = send_side_effect
self._run_process(3, 2)
# the queue should be void at the end of the test
self.assertEqual(self.queue.empty(), True)
# there should be 16 non-void cals:
# 3 initial batches of 3 msgs each + 1 initial batch of 1 msg +
# 3 retries of the batches above = 4 + 3 * 4 = 16, all failed
self.assertEqual(self.send_calls_count.value, 16)
def test_with_unlimited_retries(self):
# lets create a queue and add 10 messages for 10 different partitions
# to show how retries should work ideally
for i in range(10):
self.queue.put((TopicAndPartition("test", i), "msg %i", "key %i"))
def send_side_effect(reqs, *args, **kwargs):
self.send_calls_count.value += 1
raise FailedPayloadsError(reqs)
self.client.send_produce_request.side_effect = send_side_effect
self._run_process(None)
# the queue should have 7 elements
# 3 batches of 1 msg each were retried all this time
self.assertEqual(self.queue.empty(), False)
try:
for i in range(7):
self.queue.get(timeout=0.01)
except Empty:
self.fail("Should be 7 elems in the queue")
self.assertEqual(self.queue.empty(), True)
# 1s / 50ms of backoff = 20 times max
self.assertTrue(self.send_calls_count.value > 10)
self.assertTrue(self.send_calls_count.value <= 20)
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