805b52a34d
Add function kafka.protocol.create_message_set() that takes a list of payloads and a codec and returns a message set with the desired encoding. Introduce kafka.common.UnsupportedCodecError, raised if an unknown codec is specified. Include a test for the new function.
746 lines
32 KiB
Python
746 lines
32 KiB
Python
import contextlib
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from contextlib import contextmanager
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import struct
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import unittest2
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import mock
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from mock import sentinel
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from kafka import KafkaClient
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from kafka.common import (
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OffsetRequest, OffsetCommitRequest, OffsetFetchRequest,
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OffsetResponse, OffsetCommitResponse, OffsetFetchResponse,
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ProduceRequest, FetchRequest, Message, ChecksumError,
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ConsumerFetchSizeTooSmall, ProduceResponse, FetchResponse, OffsetAndMessage,
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BrokerMetadata, PartitionMetadata, TopicAndPartition, KafkaUnavailableError,
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ProtocolError, LeaderUnavailableError, PartitionUnavailableError,
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UnsupportedCodecError
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)
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from kafka.codec import (
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has_snappy, gzip_encode, gzip_decode,
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snappy_encode, snappy_decode
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)
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import kafka.protocol
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from kafka.protocol import (
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ATTRIBUTE_CODEC_MASK, CODEC_NONE, CODEC_GZIP, CODEC_SNAPPY, KafkaProtocol,
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create_message, create_gzip_message, create_snappy_message,
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create_message_set
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)
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class TestProtocol(unittest2.TestCase):
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def test_create_message(self):
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payload = "test"
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key = "key"
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msg = create_message(payload, key)
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self.assertEqual(msg.magic, 0)
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self.assertEqual(msg.attributes, 0)
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self.assertEqual(msg.key, key)
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self.assertEqual(msg.value, payload)
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def test_create_gzip(self):
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payloads = ["v1", "v2"]
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msg = create_gzip_message(payloads)
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self.assertEqual(msg.magic, 0)
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self.assertEqual(msg.attributes, ATTRIBUTE_CODEC_MASK & CODEC_GZIP)
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self.assertEqual(msg.key, None)
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# Need to decode to check since gzipped payload is non-deterministic
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decoded = gzip_decode(msg.value)
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expect = "".join([
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struct.pack(">q", 0), # MsgSet offset
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struct.pack(">i", 16), # MsgSet size
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struct.pack(">i", 1285512130), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", -1), # -1 indicates a null key
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struct.pack(">i", 2), # Msg length (bytes)
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"v1", # Message contents
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struct.pack(">q", 0), # MsgSet offset
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struct.pack(">i", 16), # MsgSet size
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struct.pack(">i", -711587208), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", -1), # -1 indicates a null key
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struct.pack(">i", 2), # Msg length (bytes)
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"v2", # Message contents
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])
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self.assertEqual(decoded, expect)
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@unittest2.skipUnless(has_snappy(), "Snappy not available")
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def test_create_snappy(self):
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payloads = ["v1", "v2"]
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msg = create_snappy_message(payloads)
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self.assertEqual(msg.magic, 0)
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self.assertEqual(msg.attributes, ATTRIBUTE_CODEC_MASK & CODEC_SNAPPY)
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self.assertEqual(msg.key, None)
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decoded = snappy_decode(msg.value)
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expect = "".join([
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struct.pack(">q", 0), # MsgSet offset
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struct.pack(">i", 16), # MsgSet size
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struct.pack(">i", 1285512130), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", -1), # -1 indicates a null key
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struct.pack(">i", 2), # Msg length (bytes)
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"v1", # Message contents
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struct.pack(">q", 0), # MsgSet offset
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struct.pack(">i", 16), # MsgSet size
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struct.pack(">i", -711587208), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", -1), # -1 indicates a null key
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struct.pack(">i", 2), # Msg length (bytes)
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"v2", # Message contents
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])
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self.assertEqual(decoded, expect)
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def test_encode_message_header(self):
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expect = "".join([
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struct.pack(">h", 10), # API Key
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struct.pack(">h", 0), # API Version
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struct.pack(">i", 4), # Correlation Id
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struct.pack(">h", len("client3")), # Length of clientId
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"client3", # ClientId
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])
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encoded = KafkaProtocol._encode_message_header("client3", 4, 10)
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self.assertEqual(encoded, expect)
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def test_encode_message(self):
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message = create_message("test", "key")
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encoded = KafkaProtocol._encode_message(message)
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expect = "".join([
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struct.pack(">i", -1427009701), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 3), # Length of key
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"key", # key
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struct.pack(">i", 4), # Length of value
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"test", # value
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])
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self.assertEqual(encoded, expect)
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def test_decode_message(self):
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encoded = "".join([
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struct.pack(">i", -1427009701), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 3), # Length of key
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"key", # key
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struct.pack(">i", 4), # Length of value
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"test", # value
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])
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offset = 10
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(returned_offset, decoded_message) = list(KafkaProtocol._decode_message(encoded, offset))[0]
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self.assertEqual(returned_offset, offset)
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self.assertEqual(decoded_message, create_message("test", "key"))
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def test_encode_message_failure(self):
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with self.assertRaises(ProtocolError):
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KafkaProtocol._encode_message(Message(1, 0, "key", "test"))
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def test_encode_message_set(self):
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message_set = [
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create_message("v1", "k1"),
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create_message("v2", "k2")
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]
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encoded = KafkaProtocol._encode_message_set(message_set)
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expect = "".join([
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struct.pack(">q", 0), # MsgSet Offset
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struct.pack(">i", 18), # Msg Size
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struct.pack(">i", 1474775406), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 2), # Length of key
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"k1", # Key
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struct.pack(">i", 2), # Length of value
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"v1", # Value
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struct.pack(">q", 0), # MsgSet Offset
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struct.pack(">i", 18), # Msg Size
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struct.pack(">i", -16383415), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 2), # Length of key
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"k2", # Key
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struct.pack(">i", 2), # Length of value
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"v2", # Value
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])
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self.assertEqual(encoded, expect)
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def test_decode_message_set(self):
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encoded = "".join([
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struct.pack(">q", 0), # MsgSet Offset
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struct.pack(">i", 18), # Msg Size
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struct.pack(">i", 1474775406), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 2), # Length of key
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"k1", # Key
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struct.pack(">i", 2), # Length of value
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"v1", # Value
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struct.pack(">q", 1), # MsgSet Offset
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struct.pack(">i", 18), # Msg Size
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struct.pack(">i", -16383415), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 2), # Length of key
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"k2", # Key
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struct.pack(">i", 2), # Length of value
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"v2", # Value
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])
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msgs = list(KafkaProtocol._decode_message_set_iter(encoded))
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self.assertEqual(len(msgs), 2)
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msg1, msg2 = msgs
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returned_offset1, decoded_message1 = msg1
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returned_offset2, decoded_message2 = msg2
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self.assertEqual(returned_offset1, 0)
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self.assertEqual(decoded_message1, create_message("v1", "k1"))
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self.assertEqual(returned_offset2, 1)
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self.assertEqual(decoded_message2, create_message("v2", "k2"))
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def test_decode_message_gzip(self):
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gzip_encoded = ('\xc0\x11\xb2\xf0\x00\x01\xff\xff\xff\xff\x00\x00\x000'
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'\x1f\x8b\x08\x00\xa1\xc1\xc5R\x02\xffc`\x80\x03\x01'
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'\x9f\xf9\xd1\x87\x18\x18\xfe\x03\x01\x90\xc7Tf\xc8'
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'\x80$wu\x1aW\x05\x92\x9c\x11\x00z\xc0h\x888\x00\x00'
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'\x00')
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offset = 11
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messages = list(KafkaProtocol._decode_message(gzip_encoded, offset))
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self.assertEqual(len(messages), 2)
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msg1, msg2 = messages
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returned_offset1, decoded_message1 = msg1
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self.assertEqual(returned_offset1, 0)
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self.assertEqual(decoded_message1, create_message("v1"))
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returned_offset2, decoded_message2 = msg2
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self.assertEqual(returned_offset2, 0)
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self.assertEqual(decoded_message2, create_message("v2"))
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@unittest2.skipUnless(has_snappy(), "Snappy not available")
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def test_decode_message_snappy(self):
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snappy_encoded = ('\xec\x80\xa1\x95\x00\x02\xff\xff\xff\xff\x00\x00'
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'\x00,8\x00\x00\x19\x01@\x10L\x9f[\xc2\x00\x00\xff'
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'\xff\xff\xff\x00\x00\x00\x02v1\x19\x1bD\x00\x10\xd5'
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'\x96\nx\x00\x00\xff\xff\xff\xff\x00\x00\x00\x02v2')
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offset = 11
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messages = list(KafkaProtocol._decode_message(snappy_encoded, offset))
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self.assertEqual(len(messages), 2)
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msg1, msg2 = messages
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returned_offset1, decoded_message1 = msg1
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self.assertEqual(returned_offset1, 0)
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self.assertEqual(decoded_message1, create_message("v1"))
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returned_offset2, decoded_message2 = msg2
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self.assertEqual(returned_offset2, 0)
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self.assertEqual(decoded_message2, create_message("v2"))
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def test_decode_message_checksum_error(self):
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invalid_encoded_message = "This is not a valid encoded message"
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iter = KafkaProtocol._decode_message(invalid_encoded_message, 0)
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self.assertRaises(ChecksumError, list, iter)
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# NOTE: The error handling in _decode_message_set_iter() is questionable.
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# If it's modified, the next two tests might need to be fixed.
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def test_decode_message_set_fetch_size_too_small(self):
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with self.assertRaises(ConsumerFetchSizeTooSmall):
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list(KafkaProtocol._decode_message_set_iter('a'))
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def test_decode_message_set_stop_iteration(self):
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encoded = "".join([
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struct.pack(">q", 0), # MsgSet Offset
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struct.pack(">i", 18), # Msg Size
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struct.pack(">i", 1474775406), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 2), # Length of key
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"k1", # Key
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struct.pack(">i", 2), # Length of value
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"v1", # Value
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struct.pack(">q", 1), # MsgSet Offset
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struct.pack(">i", 18), # Msg Size
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struct.pack(">i", -16383415), # CRC
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struct.pack(">bb", 0, 0), # Magic, flags
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struct.pack(">i", 2), # Length of key
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"k2", # Key
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struct.pack(">i", 2), # Length of value
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"v2", # Value
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"@1$%(Y!", # Random padding
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])
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msgs = list(KafkaProtocol._decode_message_set_iter(encoded))
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self.assertEqual(len(msgs), 2)
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msg1, msg2 = msgs
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returned_offset1, decoded_message1 = msg1
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returned_offset2, decoded_message2 = msg2
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self.assertEqual(returned_offset1, 0)
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self.assertEqual(decoded_message1, create_message("v1", "k1"))
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self.assertEqual(returned_offset2, 1)
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self.assertEqual(decoded_message2, create_message("v2", "k2"))
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def test_encode_produce_request(self):
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requests = [
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ProduceRequest("topic1", 0, [
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create_message("a"),
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create_message("b")
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]),
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ProduceRequest("topic2", 1, [
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create_message("c")
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])
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]
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msg_a_binary = KafkaProtocol._encode_message(create_message("a"))
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msg_b_binary = KafkaProtocol._encode_message(create_message("b"))
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msg_c_binary = KafkaProtocol._encode_message(create_message("c"))
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header = "".join([
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struct.pack('>i', 0x94), # The length of the message overall
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struct.pack('>h', 0), # Msg Header, Message type = Produce
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struct.pack('>h', 0), # Msg Header, API version
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struct.pack('>i', 2), # Msg Header, Correlation ID
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struct.pack('>h7s', 7, "client1"), # Msg Header, The client ID
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struct.pack('>h', 2), # Num acks required
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struct.pack('>i', 100), # Request Timeout
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struct.pack('>i', 2), # The number of requests
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])
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total_len = len(msg_a_binary) + len(msg_b_binary)
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topic1 = "".join([
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struct.pack('>h6s', 6, 'topic1'), # The topic1
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struct.pack('>i', 1), # One message set
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struct.pack('>i', 0), # Partition 0
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struct.pack('>i', total_len + 24), # Size of the incoming message set
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struct.pack('>q', 0), # No offset specified
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struct.pack('>i', len(msg_a_binary)), # Length of message
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msg_a_binary, # Actual message
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struct.pack('>q', 0), # No offset specified
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struct.pack('>i', len(msg_b_binary)), # Length of message
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msg_b_binary, # Actual message
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])
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topic2 = "".join([
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struct.pack('>h6s', 6, 'topic2'), # The topic1
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struct.pack('>i', 1), # One message set
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struct.pack('>i', 1), # Partition 1
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struct.pack('>i', len(msg_c_binary) + 12), # Size of the incoming message set
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struct.pack('>q', 0), # No offset specified
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struct.pack('>i', len(msg_c_binary)), # Length of message
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msg_c_binary, # Actual message
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])
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expected1 = "".join([ header, topic1, topic2 ])
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expected2 = "".join([ header, topic2, topic1 ])
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encoded = KafkaProtocol.encode_produce_request("client1", 2, requests, 2, 100)
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self.assertIn(encoded, [ expected1, expected2 ])
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def test_decode_produce_response(self):
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t1 = "topic1"
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t2 = "topic2"
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encoded = struct.pack('>iih%dsiihqihqh%dsiihq' % (len(t1), len(t2)),
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2, 2, len(t1), t1, 2, 0, 0, 10L, 1, 1, 20L,
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len(t2), t2, 1, 0, 0, 30L)
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responses = list(KafkaProtocol.decode_produce_response(encoded))
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self.assertEqual(responses,
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[ProduceResponse(t1, 0, 0, 10L),
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ProduceResponse(t1, 1, 1, 20L),
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ProduceResponse(t2, 0, 0, 30L)])
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def test_encode_fetch_request(self):
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requests = [
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FetchRequest("topic1", 0, 10, 1024),
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FetchRequest("topic2", 1, 20, 100),
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]
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header = "".join([
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struct.pack('>i', 89), # The length of the message overall
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struct.pack('>h', 1), # Msg Header, Message type = Fetch
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struct.pack('>h', 0), # Msg Header, API version
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struct.pack('>i', 3), # Msg Header, Correlation ID
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struct.pack('>h7s', 7, "client1"), # Msg Header, The client ID
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struct.pack('>i', -1), # Replica Id
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struct.pack('>i', 2), # Max wait time
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struct.pack('>i', 100), # Min bytes
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struct.pack('>i', 2), # Num requests
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])
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topic1 = "".join([
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struct.pack('>h6s', 6, 'topic1'), # Topic
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struct.pack('>i', 1), # Num Payloads
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struct.pack('>i', 0), # Partition 0
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struct.pack('>q', 10), # Offset
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struct.pack('>i', 1024), # Max Bytes
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])
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topic2 = "".join([
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struct.pack('>h6s', 6, 'topic2'), # Topic
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struct.pack('>i', 1), # Num Payloads
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struct.pack('>i', 1), # Partition 0
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struct.pack('>q', 20), # Offset
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struct.pack('>i', 100), # Max Bytes
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])
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expected1 = "".join([ header, topic1, topic2 ])
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expected2 = "".join([ header, topic2, topic1 ])
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encoded = KafkaProtocol.encode_fetch_request("client1", 3, requests, 2, 100)
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self.assertIn(encoded, [ expected1, expected2 ])
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def test_decode_fetch_response(self):
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t1 = "topic1"
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t2 = "topic2"
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msgs = map(create_message, ["message1", "hi", "boo", "foo", "so fun!"])
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ms1 = KafkaProtocol._encode_message_set([msgs[0], msgs[1]])
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ms2 = KafkaProtocol._encode_message_set([msgs[2]])
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ms3 = KafkaProtocol._encode_message_set([msgs[3], msgs[4]])
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encoded = struct.pack('>iih%dsiihqi%dsihqi%dsh%dsiihqi%ds' %
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(len(t1), len(ms1), len(ms2), len(t2), len(ms3)),
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4, 2, len(t1), t1, 2, 0, 0, 10, len(ms1), ms1, 1,
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1, 20, len(ms2), ms2, len(t2), t2, 1, 0, 0, 30,
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len(ms3), ms3)
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responses = list(KafkaProtocol.decode_fetch_response(encoded))
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def expand_messages(response):
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return FetchResponse(response.topic, response.partition,
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response.error, response.highwaterMark,
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list(response.messages))
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expanded_responses = map(expand_messages, responses)
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expect = [FetchResponse(t1, 0, 0, 10, [OffsetAndMessage(0, msgs[0]),
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OffsetAndMessage(0, msgs[1])]),
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FetchResponse(t1, 1, 1, 20, [OffsetAndMessage(0, msgs[2])]),
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FetchResponse(t2, 0, 0, 30, [OffsetAndMessage(0, msgs[3]),
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OffsetAndMessage(0, msgs[4])])]
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self.assertEqual(expanded_responses, expect)
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def test_encode_metadata_request_no_topics(self):
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expected = "".join([
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struct.pack(">i", 17), # Total length of the request
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struct.pack('>h', 3), # API key metadata fetch
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struct.pack('>h', 0), # API version
|
|
struct.pack('>i', 4), # Correlation ID
|
|
struct.pack('>h3s', 3, "cid"), # The client ID
|
|
struct.pack('>i', 0), # No topics, give all the data!
|
|
])
|
|
|
|
encoded = KafkaProtocol.encode_metadata_request("cid", 4)
|
|
|
|
self.assertEqual(encoded, expected)
|
|
|
|
def test_encode_metadata_request_with_topics(self):
|
|
expected = "".join([
|
|
struct.pack(">i", 25), # Total length of the request
|
|
struct.pack('>h', 3), # API key metadata fetch
|
|
struct.pack('>h', 0), # API version
|
|
struct.pack('>i', 4), # Correlation ID
|
|
struct.pack('>h3s', 3, "cid"), # The client ID
|
|
struct.pack('>i', 2), # Number of topics in the request
|
|
struct.pack('>h2s', 2, "t1"), # Topic "t1"
|
|
struct.pack('>h2s', 2, "t2"), # Topic "t2"
|
|
])
|
|
|
|
encoded = KafkaProtocol.encode_metadata_request("cid", 4, ["t1", "t2"])
|
|
|
|
self.assertEqual(encoded, expected)
|
|
|
|
def _create_encoded_metadata_response(self, broker_data, topic_data,
|
|
topic_errors, partition_errors):
|
|
encoded = struct.pack('>ii', 3, len(broker_data))
|
|
for node_id, broker in broker_data.iteritems():
|
|
encoded += struct.pack('>ih%dsi' % len(broker.host), node_id,
|
|
len(broker.host), broker.host, broker.port)
|
|
|
|
encoded += struct.pack('>i', len(topic_data))
|
|
for topic, partitions in topic_data.iteritems():
|
|
encoded += struct.pack('>hh%dsi' % len(topic), topic_errors[topic],
|
|
len(topic), topic, len(partitions))
|
|
for partition, metadata in partitions.iteritems():
|
|
encoded += struct.pack('>hiii',
|
|
partition_errors[(topic, partition)],
|
|
partition, metadata.leader,
|
|
len(metadata.replicas))
|
|
if len(metadata.replicas) > 0:
|
|
encoded += struct.pack('>%di' % len(metadata.replicas),
|
|
*metadata.replicas)
|
|
|
|
encoded += struct.pack('>i', len(metadata.isr))
|
|
if len(metadata.isr) > 0:
|
|
encoded += struct.pack('>%di' % len(metadata.isr),
|
|
*metadata.isr)
|
|
|
|
return encoded
|
|
|
|
def test_decode_metadata_response(self):
|
|
node_brokers = {
|
|
0: BrokerMetadata(0, "brokers1.kafka.rdio.com", 1000),
|
|
1: BrokerMetadata(1, "brokers1.kafka.rdio.com", 1001),
|
|
3: BrokerMetadata(3, "brokers2.kafka.rdio.com", 1000)
|
|
}
|
|
|
|
topic_partitions = {
|
|
"topic1": {
|
|
0: PartitionMetadata("topic1", 0, 1, (0, 2), (2,)),
|
|
1: PartitionMetadata("topic1", 1, 3, (0, 1), (0, 1))
|
|
},
|
|
"topic2": {
|
|
0: PartitionMetadata("topic2", 0, 0, (), ())
|
|
}
|
|
}
|
|
topic_errors = {"topic1": 0, "topic2": 1}
|
|
partition_errors = {
|
|
("topic1", 0): 0,
|
|
("topic1", 1): 1,
|
|
("topic2", 0): 0
|
|
}
|
|
encoded = self._create_encoded_metadata_response(node_brokers,
|
|
topic_partitions,
|
|
topic_errors,
|
|
partition_errors)
|
|
decoded = KafkaProtocol.decode_metadata_response(encoded)
|
|
self.assertEqual(decoded, (node_brokers, topic_partitions))
|
|
|
|
def test_encode_offset_request(self):
|
|
expected = "".join([
|
|
struct.pack(">i", 21), # Total length of the request
|
|
struct.pack('>h', 2), # Message type = offset fetch
|
|
struct.pack('>h', 0), # API version
|
|
struct.pack('>i', 4), # Correlation ID
|
|
struct.pack('>h3s', 3, "cid"), # The client ID
|
|
struct.pack('>i', -1), # Replica Id
|
|
struct.pack('>i', 0), # No topic/partitions
|
|
])
|
|
|
|
encoded = KafkaProtocol.encode_offset_request("cid", 4)
|
|
|
|
self.assertEqual(encoded, expected)
|
|
|
|
def test_encode_offset_request__no_payload(self):
|
|
expected = "".join([
|
|
struct.pack(">i", 65), # Total length of the request
|
|
|
|
struct.pack('>h', 2), # Message type = offset fetch
|
|
struct.pack('>h', 0), # API version
|
|
struct.pack('>i', 4), # Correlation ID
|
|
struct.pack('>h3s', 3, "cid"), # The client ID
|
|
struct.pack('>i', -1), # Replica Id
|
|
struct.pack('>i', 1), # Num topics
|
|
struct.pack(">h6s", 6, "topic1"), # Topic for the request
|
|
struct.pack(">i", 2), # Two partitions
|
|
|
|
struct.pack(">i", 3), # Partition 3
|
|
struct.pack(">q", -1), # No time offset
|
|
struct.pack(">i", 1), # One offset requested
|
|
|
|
struct.pack(">i", 4), # Partition 3
|
|
struct.pack(">q", -1), # No time offset
|
|
struct.pack(">i", 1), # One offset requested
|
|
])
|
|
|
|
encoded = KafkaProtocol.encode_offset_request("cid", 4, [
|
|
OffsetRequest('topic1', 3, -1, 1),
|
|
OffsetRequest('topic1', 4, -1, 1),
|
|
])
|
|
|
|
self.assertEqual(encoded, expected)
|
|
|
|
def test_decode_offset_response(self):
|
|
encoded = "".join([
|
|
struct.pack(">i", 42), # Correlation ID
|
|
struct.pack(">i", 1), # One topics
|
|
struct.pack(">h6s", 6, "topic1"), # First topic
|
|
struct.pack(">i", 2), # Two partitions
|
|
|
|
struct.pack(">i", 2), # Partition 2
|
|
struct.pack(">h", 0), # No error
|
|
struct.pack(">i", 1), # One offset
|
|
struct.pack(">q", 4), # Offset 4
|
|
|
|
struct.pack(">i", 4), # Partition 4
|
|
struct.pack(">h", 0), # No error
|
|
struct.pack(">i", 1), # One offset
|
|
struct.pack(">q", 8), # Offset 8
|
|
])
|
|
|
|
results = KafkaProtocol.decode_offset_response(encoded)
|
|
self.assertEqual(set(results), set([
|
|
OffsetResponse(topic = 'topic1', partition = 2, error = 0, offsets=(4,)),
|
|
OffsetResponse(topic = 'topic1', partition = 4, error = 0, offsets=(8,)),
|
|
]))
|
|
|
|
def test_encode_offset_commit_request(self):
|
|
header = "".join([
|
|
struct.pack('>i', 99), # Total message length
|
|
|
|
struct.pack('>h', 8), # Message type = offset commit
|
|
struct.pack('>h', 0), # API version
|
|
struct.pack('>i', 42), # Correlation ID
|
|
struct.pack('>h9s', 9, "client_id"), # The client ID
|
|
struct.pack('>h8s', 8, "group_id"), # The group to commit for
|
|
struct.pack('>i', 2), # Num topics
|
|
])
|
|
|
|
topic1 = "".join([
|
|
struct.pack(">h6s", 6, "topic1"), # Topic for the request
|
|
struct.pack(">i", 2), # Two partitions
|
|
struct.pack(">i", 0), # Partition 0
|
|
struct.pack(">q", 123), # Offset 123
|
|
struct.pack(">h", -1), # Null metadata
|
|
struct.pack(">i", 1), # Partition 1
|
|
struct.pack(">q", 234), # Offset 234
|
|
struct.pack(">h", -1), # Null metadata
|
|
])
|
|
|
|
topic2 = "".join([
|
|
struct.pack(">h6s", 6, "topic2"), # Topic for the request
|
|
struct.pack(">i", 1), # One partition
|
|
struct.pack(">i", 2), # Partition 2
|
|
struct.pack(">q", 345), # Offset 345
|
|
struct.pack(">h", -1), # Null metadata
|
|
])
|
|
|
|
expected1 = "".join([ header, topic1, topic2 ])
|
|
expected2 = "".join([ header, topic2, topic1 ])
|
|
|
|
encoded = KafkaProtocol.encode_offset_commit_request("client_id", 42, "group_id", [
|
|
OffsetCommitRequest("topic1", 0, 123, None),
|
|
OffsetCommitRequest("topic1", 1, 234, None),
|
|
OffsetCommitRequest("topic2", 2, 345, None),
|
|
])
|
|
|
|
self.assertIn(encoded, [ expected1, expected2 ])
|
|
|
|
def test_decode_offset_commit_response(self):
|
|
encoded = "".join([
|
|
struct.pack(">i", 42), # Correlation ID
|
|
struct.pack(">i", 1), # One topic
|
|
struct.pack(">h6s", 6, "topic1"), # First topic
|
|
struct.pack(">i", 2), # Two partitions
|
|
|
|
struct.pack(">i", 2), # Partition 2
|
|
struct.pack(">h", 0), # No error
|
|
|
|
struct.pack(">i", 4), # Partition 4
|
|
struct.pack(">h", 0), # No error
|
|
])
|
|
|
|
results = KafkaProtocol.decode_offset_commit_response(encoded)
|
|
self.assertEqual(set(results), set([
|
|
OffsetCommitResponse(topic = 'topic1', partition = 2, error = 0),
|
|
OffsetCommitResponse(topic = 'topic1', partition = 4, error = 0),
|
|
]))
|
|
|
|
def test_encode_offset_fetch_request(self):
|
|
header = "".join([
|
|
struct.pack('>i', 69), # Total message length
|
|
struct.pack('>h', 9), # Message type = offset fetch
|
|
struct.pack('>h', 0), # API version
|
|
struct.pack('>i', 42), # Correlation ID
|
|
struct.pack('>h9s', 9, "client_id"), # The client ID
|
|
struct.pack('>h8s', 8, "group_id"), # The group to commit for
|
|
struct.pack('>i', 2), # Num topics
|
|
])
|
|
|
|
topic1 = "".join([
|
|
struct.pack(">h6s", 6, "topic1"), # Topic for the request
|
|
struct.pack(">i", 2), # Two partitions
|
|
struct.pack(">i", 0), # Partition 0
|
|
struct.pack(">i", 1), # Partition 1
|
|
])
|
|
|
|
topic2 = "".join([
|
|
struct.pack(">h6s", 6, "topic2"), # Topic for the request
|
|
struct.pack(">i", 1), # One partitions
|
|
struct.pack(">i", 2), # Partition 2
|
|
])
|
|
|
|
expected1 = "".join([ header, topic1, topic2 ])
|
|
expected2 = "".join([ header, topic2, topic1 ])
|
|
|
|
encoded = KafkaProtocol.encode_offset_fetch_request("client_id", 42, "group_id", [
|
|
OffsetFetchRequest("topic1", 0),
|
|
OffsetFetchRequest("topic1", 1),
|
|
OffsetFetchRequest("topic2", 2),
|
|
])
|
|
|
|
self.assertIn(encoded, [ expected1, expected2 ])
|
|
|
|
def test_decode_offset_fetch_response(self):
|
|
encoded = "".join([
|
|
struct.pack(">i", 42), # Correlation ID
|
|
struct.pack(">i", 1), # One topics
|
|
struct.pack(">h6s", 6, "topic1"), # First topic
|
|
struct.pack(">i", 2), # Two partitions
|
|
|
|
struct.pack(">i", 2), # Partition 2
|
|
struct.pack(">q", 4), # Offset 4
|
|
struct.pack(">h4s", 4, "meta"), # Metadata
|
|
struct.pack(">h", 0), # No error
|
|
|
|
struct.pack(">i", 4), # Partition 4
|
|
struct.pack(">q", 8), # Offset 8
|
|
struct.pack(">h4s", 4, "meta"), # Metadata
|
|
struct.pack(">h", 0), # No error
|
|
])
|
|
|
|
results = KafkaProtocol.decode_offset_fetch_response(encoded)
|
|
self.assertEqual(set(results), set([
|
|
OffsetFetchResponse(topic = 'topic1', partition = 2, offset = 4, error = 0, metadata = "meta"),
|
|
OffsetFetchResponse(topic = 'topic1', partition = 4, offset = 8, error = 0, metadata = "meta"),
|
|
]))
|
|
|
|
@contextmanager
|
|
def mock_create_message_fns(self):
|
|
patches = contextlib.nested(
|
|
mock.patch.object(kafka.protocol, "create_message",
|
|
return_value=sentinel.message),
|
|
mock.patch.object(kafka.protocol, "create_gzip_message",
|
|
return_value=sentinel.gzip_message),
|
|
mock.patch.object(kafka.protocol, "create_snappy_message",
|
|
return_value=sentinel.snappy_message),
|
|
)
|
|
|
|
with patches:
|
|
yield
|
|
|
|
def test_create_message_set(self):
|
|
messages = [1, 2, 3]
|
|
|
|
# Default codec is CODEC_NONE. Expect list of regular messages.
|
|
expect = [sentinel.message] * len(messages)
|
|
with self.mock_create_message_fns():
|
|
message_set = create_message_set(messages)
|
|
self.assertEqual(message_set, expect)
|
|
|
|
# CODEC_NONE: Expect list of regular messages.
|
|
expect = [sentinel.message] * len(messages)
|
|
with self.mock_create_message_fns():
|
|
message_set = create_message_set(messages, CODEC_NONE)
|
|
self.assertEqual(message_set, expect)
|
|
|
|
# CODEC_GZIP: Expect list of one gzip-encoded message.
|
|
expect = [sentinel.gzip_message]
|
|
with self.mock_create_message_fns():
|
|
message_set = create_message_set(messages, CODEC_GZIP)
|
|
self.assertEqual(message_set, expect)
|
|
|
|
# CODEC_SNAPPY: Expect list of one snappy-encoded message.
|
|
expect = [sentinel.snappy_message]
|
|
with self.mock_create_message_fns():
|
|
message_set = create_message_set(messages, CODEC_SNAPPY)
|
|
self.assertEqual(message_set, expect)
|
|
|
|
# Unknown codec should raise UnsupportedCodecError.
|
|
with self.assertRaises(UnsupportedCodecError):
|
|
create_message_set(messages, -1)
|