class AbstractConsumer(ABC):
def __init__(self, group_id: str, topic_name: str, last: bool):
offset_reset = "earliest"
if last:
offset_reset = "latest"
self._config = Config().create_confluent_config()
self._config.update({
"group.id": group_id,
"error_cb": raise_for_kafka_error,
# We need to commit offsets manually once we"re sure it got saved
# to the sink
"enable.auto.commit": True,
"enable.partition.eof": False,
# We need this to start at the last committed offset instead of the
# latest when subscribing for the first time
"default.topic.config": {
"auto.offset.reset": offset_reset
},
})
self._consumer = confluent_kafka.Consumer(self._config)
self._subscribe(topic_name)
def _subscribe(self, topic: str) -> None:
self._consumer.subscribe([topic])
@abstractmethod
def consume(self, amount: int) -> int:
pass
def _consume_single_message(self, timeout=30) -> Optional[Message]:
message = self._consumer.poll(timeout=timeout)
raise_for_message(message)
return message
def test_kafka_python_config(config: Config):
config.context_switch("context_5")
expected_config = {
"bootstrap_servers":
["kafka:9094", "kafka1:9094", "kafka2:9094", "kafka3:9094"],
"security_protocol":
"SASL_SSL",
"sasl_mechanism":
"PLAIN",
"sasl_plain_username":
"******",
"sasl_plain_password":
"******",
"ssl_cafile":
"/my/ca.crt",
"ssl_certfile":
"/my/certificate.crt",
"ssl_keyfile":
"/my/certificate.key",
"ssl_password":
"******",
}
actual_config = config.create_kafka_python_config()
assert expected_config == actual_config
def test_pykafka_config(mocker: mock, config: Config):
ssl_config_sentinel = mock.sentinel.ssl_config
ssl_config_mock = mocker.patch("esque.config.SslConfig", return_value=ssl_config_sentinel)
plain_authenticator_sentinel = mock.sentinel.plain_authenticator
plain_authenticator_mock = mocker.patch(
"pykafka.sasl_authenticators.PlainAuthenticator", return_value=plain_authenticator_sentinel
)
config.context_switch("context_5")
expected_config = {
"hosts": "kafka:9094,kafka1:9094,kafka2:9094,kafka3:9094",
"sasl_authenticator": plain_authenticator_sentinel,
"ssl_config": ssl_config_sentinel,
}
actual_config = config.create_pykafka_config()
assert expected_config == actual_config
ssl_config_mock.assert_called_with(
**{
"cafile": "/my/ca.crt",
"certfile": "/my/certificate.crt",
"keyfile": "/my/certificate.key",
"password": "******",
}
)
plain_authenticator_mock.assert_called_with(user="******", password="******", security_protocol="SASL_SSL")
def __init__(self):
self._config = Config()
self.confluent_client = AdminClient(
self._config.create_confluent_config())
self.pykafka_client = pykafka.client.KafkaClient(
**self._config.create_pykafka_config(), broker_version="1.0.0")
self.confluent_client.poll(timeout=1)
self.__topic_controller = None
def __init__(self):
self.queue_length = 100000
self.internal_queue_length_limit = self.queue_length / 0.5
self._config = Config().create_confluent_config()
self._config.update({
"on_delivery": delivery_callback,
"error_cb": raise_for_kafka_error,
"queue.buffering.max.messages": self.queue_length,
})
def test_sasl_params(config: Config):
assert config.sasl_params == {}
config.context_switch("context_5")
assert config.sasl_params == {
"mechanism": "PLAIN",
"user": "******",
"password": "******"
}
assert config.sasl_mechanism == "PLAIN"
def test_ssl_params(config: Config):
assert config.ssl_params == {}
config.context_switch("context_5")
assert config.ssl_params == {
"cafile": "/my/ca.crt",
"certfile": "/my/certificate.crt",
"keyfile": "/my/certificate.key",
"password": "******",
}
def test_current_context_bootstrap_servers(config: Config):
assert config.bootstrap_servers == ["localhost:9091"]
config.context_switch("context_3")
assert config.bootstrap_servers == [
"node01.cool-domain.com:9093",
"node02.cool-domain.com:9093",
"node03.cool-domain.com:9093",
]
class Producer(ABC):
def __init__(self):
self.queue_length = 100000
self.internal_queue_length_limit = self.queue_length / 0.5
self._config = Config().create_confluent_config()
self._config.update({
"on_delivery": delivery_callback,
"error_cb": raise_for_kafka_error,
"queue.buffering.max.messages": self.queue_length,
})
@abstractmethod
def produce(self, topic_name: str) -> int:
pass
def _create_config(self):
try:
self._config = Config.get_instance()
except ConfigNotExistsException:
click.echo(f"No config provided in {config_dir()}")
if ensure_approval(
f"Should a sample file be created in {config_dir()}"):
config_dir().mkdir(exist_ok=True)
copyfile(sample_config_path().as_posix(), config_path())
else:
raise
if ensure_approval("Do you want to modify the config file now?"):
click.edit(filename=config_path().as_posix())
self._config = Config.get_instance()
def test_fix_missing_context_config(interactive_cli_runner: CliRunner,
load_config: config_loader):
load_config(LOAD_BROKEN_CONFIG)
_cfg = Config(disable_validation=True)
assert _cfg.current_context not in _cfg.available_contexts
interactive_cli_runner.invoke(esque,
args=["config", "fix"],
catch_exceptions=False)
_cfg = Config.get_instance()
assert _cfg.current_context in _cfg.available_contexts
def unittest_config(request: FixtureRequest,
load_config: config_loader) -> Config:
conffile, _ = load_config(LOAD_INTEGRATION_TEST_CONFIG)
esque_config = Config.get_instance()
if request.config.getoption("--local"):
esque_config.context_switch("local")
return esque_config
def __init__(
self,
group_id: str,
topic_name: str,
output_directory: pathlib.Path,
last: bool,
match: str = None,
initialize_default_output_directory: bool = False,
enable_auto_commit: bool = True,
):
super().__init__(
group_id,
topic_name,
output_directory,
last,
match,
initialize_default_output_directory,
enable_auto_commit,
)
self.schema_registry_client = SchemaRegistryClient(
Config.get_instance().schema_registry)
self.writers[-1] = (StdOutAvroWriter(
schema_registry_client=self.schema_registry_client)
if output_directory is None else AvroFileWriter(
self.output_directory /
"partition_any", self.schema_registry_client))
if self._initialize_default_output_directory and self.output_directory is not None:
self.writers[-1].init_destination_directory()
def test_validation_called(mocker: mock, load_config: config_loader):
conf_path, conf_content = load_config()
validator_mock = mocker.patch("esque.validation.validate_esque_config")
Config()
validated_config_dict, = validator_mock.call_args[0]
assert validated_config_dict == yaml.safe_load(conf_content)
def test_invalid_config(load_config: config_loader):
conf_path, conf_content = load_config()
conf_content += '\nasdf:"'
conf_path.write_text(conf_content)
with pytest.raises(ScannerError):
Config()
def commit_offsets(self, consumer_id: str, offsets: List[TopicPartition]):
config = Config.get_instance()
consumer = Consumer({
"group.id": consumer_id,
**config.create_confluent_config()
})
consumer.commit(offsets=offsets, asynchronous=False)
consumer.close()
def test_confluent_config(config: Config):
config.context_switch("context_5")
expected_config = {
"bootstrap.servers": "kafka:9094,kafka1:9094,kafka2:9094,kafka3:9094",
"security.protocol": "SASL_SSL",
"schema.registry.url": "http://schema-registry.example.com",
"sasl.mechanisms": "PLAIN",
"sasl.username": "******",
"sasl.password": "******",
"ssl.ca.location": "/my/ca.crt",
"ssl.certificate.location": "/my/certificate.crt",
"ssl.key.location": "/my/certificate.key",
"ssl.key.password": "******",
}
actual_config = config.create_confluent_config(include_schema_registry=True)
assert expected_config == actual_config
def _get_partitions(
self,
topic: Topic,
retrieve_last_timestamp: bool,
get_partition_watermarks: bool = True) -> List[Partition]:
assert not (
retrieve_last_timestamp and not get_partition_watermarks
), "Can not retrieve timestamp without partition watermarks"
config = Config.get_instance().create_confluent_config()
config.update({
"group.id": ESQUE_GROUP_ID,
"topic.metadata.refresh.interval.ms": "250"
})
with closing(confluent_kafka.Consumer(config)) as consumer:
confluent_topic = consumer.list_topics(
topic=topic.name).topics[topic.name]
partitions: List[Partition] = []
if not get_partition_watermarks:
return [
Partition(partition_id, -1, -1, meta.isrs, meta.leader,
meta.replicas, None) for partition_id, meta in
confluent_topic.partitions.items()
]
for partition_id, meta in confluent_topic.partitions.items():
try:
low, high = consumer.get_watermark_offsets(
TopicPartition(topic=topic.name,
partition=partition_id))
except KafkaException:
# retry after metadata should be refreshed (also consider small network delays)
# unfortunately we cannot explicitly cause and wait for a metadata refresh
time.sleep(1)
low, high = consumer.get_watermark_offsets(
TopicPartition(topic=topic.name,
partition=partition_id))
latest_timestamp = None
if high > low and retrieve_last_timestamp:
assignment = [
TopicPartition(topic=topic.name,
partition=partition_id,
offset=high - 1)
]
consumer.assign(assignment)
msg = consumer.poll(timeout=10)
if msg is None:
logger.warning(
f"Due to timeout latest timestamp for topic `{topic.name}` "
f"and partition `{partition_id}` is missing.")
else:
latest_timestamp = float(msg.timestamp()[1]) / 1000
partition = Partition(partition_id, low, high, meta.isrs,
meta.leader, meta.replicas,
latest_timestamp)
partitions.append(partition)
return partitions
def test_config_too_new(load_config: config_loader):
conf_path, conf_content = load_config()
data = yaml.safe_load(conf_content)
data["version"] = CURRENT_VERSION + 1
with conf_path.open("w") as f:
yaml.dump(data, f)
with pytest.raises(ConfigTooNew):
Config()
def config_fix(state: State):
"""Fix simple errors in esque config.
Fixes simple errors like wrong current_contexts in the esque config when the configs was tampered with manually."""
try:
state.config.context_switch(state.config.current_context)
click.echo("Your config seems fine. 🎉")
except ValidationException:
_cfg: Config = Config(disable_validation=True)
if _cfg.current_context not in _cfg.available_contexts:
click.echo(
f"Found invalid current context. Switching context to state {_cfg.available_contexts[0]}."
)
_cfg.context_switch(_cfg.available_contexts[0])
Config.set_instance(_cfg)
state.config.save()
else:
click.echo(
"Can't fix this configuration error try fixing it manually.")
def consumer(topic_object: Topic, consumer_group):
_config = Config().create_confluent_config()
_config.update({
"group.id": consumer_group,
"error_cb": raise_for_kafka_error,
# We need to commit offsets manually once we"re sure it got saved
# to the sink
"enable.auto.commit": False,
"enable.partition.eof": False,
# We need this to start at the last committed offset instead of the
# latest when subscribing for the first time
"default.topic.config": {
"auto.offset.reset": "latest"
},
})
_consumer = confluent_kafka.Consumer(_config)
_consumer.assign(
[TopicPartition(topic=topic_object.name, partition=0, offset=0)])
yield _consumer
class Cluster:
def __init__(self):
self._config = Config()
self.confluent_client = AdminClient(
self._config.create_confluent_config())
self.pykafka_client = pykafka.client.KafkaClient(
**self._config.create_pykafka_config(), broker_version="1.0.0")
self.confluent_client.poll(timeout=1)
self.__topic_controller = None
@property
def topic_controller(self) -> TopicController:
if self.__topic_controller is None:
self.__topic_controller = TopicController(self, self._config)
return self.__topic_controller
@property
def bootstrap_servers(self):
return self._config.bootstrap_servers
def get_metadata(self):
return self.confluent_client.list_topics(timeout=1)
@property
def brokers(self):
metadata = self.confluent_client.list_topics(timeout=1)
return sorted(
[{
"id": broker.id,
"host": broker.host,
"port": broker.port
} for broker in metadata.brokers.values()],
key=operator.itemgetter("id"),
)
def retrieve_config(self, config_type: ConfigResource.Type, id):
requested_resources = [ConfigResource(config_type, str(id))]
futures = self.confluent_client.describe_configs(requested_resources)
(old_resource, future), = futures.items()
future = ensure_kafka_futures_done([future])
result = future.result()
return unpack_confluent_config(result)
def test_edit_config(mocker: mock, interactive_cli_runner: CliRunner,
load_config: config_loader):
conf_path, old_conf_text = load_config()
data = yaml.safe_load(old_conf_text)
data["contexts"]["dupe"] = data["contexts"]["context_1"]
mocker.patch.object(click, "edit", return_value=yaml.dump(data))
result = interactive_cli_runner.invoke(config_edit, catch_exceptions=False)
assert result.exit_code == 0
config = Config()
assert "dupe" in config.available_contexts
def target_topic_avro_consumer(unittest_config: Config, target_topic: Tuple[str, int]) -> AvroConsumer:
consumer = AvroConsumer(
{
"group.id": "asdf",
"enable.auto.commit": False,
"enable.partition.eof": False,
**unittest_config.create_confluent_config(include_schema_registry=True),
}
)
consumer.assign([TopicPartition(topic=target_topic[0], partition=i, offset=0) for i in range(target_topic[1])])
yield consumer
consumer.close()
def __init__(self, group_id: str, topic_name: str, last: bool):
offset_reset = "earliest"
if last:
offset_reset = "latest"
self._config = Config().create_confluent_config()
self._config.update({
"group.id": group_id,
"error_cb": raise_for_kafka_error,
# We need to commit offsets manually once we"re sure it got saved
# to the sink
"enable.auto.commit": True,
"enable.partition.eof": False,
# We need this to start at the last committed offset instead of the
# latest when subscribing for the first time
"default.topic.config": {
"auto.offset.reset": offset_reset
},
})
self._consumer = confluent_kafka.Consumer(self._config)
self._subscribe(topic_name)
def __init__(self, topic_name: str, match: str = None):
self.queue_length = 100000
self.internal_queue_length_limit = self.queue_length / 0.5
self._config = Config.get_instance().create_confluent_config()
self._setup_config()
self.logger = logging.getLogger(__name__)
self._topic_name = topic_name
self._match = match
self._producer = None
if self._match is not None:
self._rule_tree = RuleTree(match)
else:
self._rule_tree = None
self.create_internal_producer()
def __init__(self):
self.no_verify = False
try:
self.config = Config()
except ConfigNotExistsException:
click.echo(f"No config provided in {config_dir()}")
config_dir().mkdir(exist_ok=True)
if ensure_approval(
f"Should a sample file be created in {config_dir()}"):
copyfile(sample_config_path().as_posix(), config_path())
if ensure_approval("Do you want to modify the config file now?"):
click.edit(filename=config_path().as_posix())
sys.exit(0)
self._cluster = None
def _setup_config(self):
offset_reset = "earliest"
if self._last:
offset_reset = "latest"
self._config = Config.get_instance().create_confluent_config()
self._config.update({
"group.id": self._group_id,
"error_cb": log_error,
# We need to commit offsets manually once we"re sure it got saved
# to the sink
"enable.auto.commit": self._enable_auto_commit,
"enable.partition.eof": True,
# We need this to start at the last committed offset instead of the
# latest when subscribing for the first time
"default.topic.config": {
"auto.offset.reset": offset_reset
},
})
def randomly_generated_consumer_groups(filled_topic,
unittest_config: Config,
prefix="") -> str:
randomly_generated_consumer_group = prefix + "".join(
random.choices(ascii_letters, k=8))
_config = unittest_config.create_confluent_config()
_config.update({
"group.id": randomly_generated_consumer_group,
"enable.auto.commit": False,
"default.topic.config": {
"auto.offset.reset": "latest"
},
})
_consumer = confluent_kafka.Consumer(_config)
_consumer.assign(
[TopicPartition(topic=filled_topic.name, partition=0, offset=0)])
for i in range(2):
msg = _consumer.consume(timeout=10)[0]
_consumer.commit(msg, asynchronous=False)
return randomly_generated_consumer_group
def __init__(self, working_dir: pathlib.Path):
super().__init__(working_dir)
self._config.update({"schema.registry.url": Config().schema_registry})
self._producer = AvroProducer(self._config)
