Python SimpleClient.load_metadata_for_topics方法代码示例

# 需要导入模块: from kafka import SimpleClient [as 别名]
# 或者: from kafka.SimpleClient import load_metadata_for_topics [as 别名]
    def test_load_metadata(self, protocol, conn):

        mock_conn(conn)

        brokers = [
            BrokerMetadata(0, 'broker_1', 4567, None),
            BrokerMetadata(1, 'broker_2', 5678, None)
        ]
        resp0_brokers = list(map(itemgetter(0, 1, 2), brokers))

        topics = [
            (NO_ERROR, 'topic_1', [
                (NO_ERROR, 0, 1, [1, 2], [1, 2])
            ]),
            (NO_ERROR, 'topic_noleader', [
                (NO_LEADER, 0, -1, [], []),
                (NO_LEADER, 1, -1, [], []),
            ]),
            (NO_LEADER, 'topic_no_partitions', []),
            (UNKNOWN_TOPIC_OR_PARTITION, 'topic_unknown', []),
            (NO_ERROR, 'topic_3', [
                (NO_ERROR, 0, 0, [0, 1], [0, 1]),
                (NO_ERROR, 1, 1, [1, 0], [1, 0]),
                (NO_ERROR, 2, 0, [0, 1], [0, 1])
            ])
        ]
        protocol.decode_metadata_response.return_value = MetadataResponse[0](resp0_brokers, topics)

        # client loads metadata at init
        client = SimpleClient(hosts=['broker_1:4567'])
        self.assertDictEqual({
            TopicPartition('topic_1', 0): brokers[1],
            TopicPartition('topic_noleader', 0): None,
            TopicPartition('topic_noleader', 1): None,
            TopicPartition('topic_3', 0): brokers[0],
            TopicPartition('topic_3', 1): brokers[1],
            TopicPartition('topic_3', 2): brokers[0]},
            client.topics_to_brokers)

        # if we ask for metadata explicitly, it should raise errors
        with self.assertRaises(LeaderNotAvailableError):
            client.load_metadata_for_topics('topic_no_partitions')

        with self.assertRaises(UnknownTopicOrPartitionError):
            client.load_metadata_for_topics('topic_unknown')

        # This should not raise
        client.load_metadata_for_topics('topic_no_leader')

# 需要导入模块: from kafka import SimpleClient [as 别名]
# 或者: from kafka.SimpleClient import load_metadata_for_topics [as 别名]
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')