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s05_data_gen.py
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import argparse
import datetime
import random
import string
import json
import logging
import typing
import time
from kafka import KafkaAdminClient, KafkaProducer
from kafka.admin import NewTopic
from kafka.errors import KafkaError, UnknownTopicOrPartitionError, TopicAlreadyExistsError
from models import SkyoneData, SunsetData
from utils import serialize
class DataGenerator:
def __init__(self) -> None:
self.users = [f"{self.generate_string(5)}@email.com" for _ in range(100)]
# fmt: off
def generate_airport_code(self):
airports = [
"ATL", "DFW", "DEN", "ORD", "LAX", "CLT", "MCO", "LAS", "PHX", "MIA",
"SEA", "IAH", "JFK", "EWR", "FLL", "MSP", "SFO", "DTW", "BOS", "SLC",
"PHL", "BWI", "TPA", "SAN", "LGA", "MDW", "BNA", "IAD", "DCA", "AUS"
]
return random.choice(airports)
# fmt: on
def generate_string(self, size: int):
return "".join(random.choice(string.ascii_uppercase) for i in range(size))
def generate_email(self):
return random.choice(self.users)
def generate_departure_time(self):
return datetime.datetime.now() + datetime.timedelta(
days=random.randrange(-20, 60),
hours=random.randrange(24),
minutes=random.randrange(60),
seconds=random.randrange(60),
)
def generate_arrival_time(self, departure: datetime.datetime):
return departure + datetime.timedelta(
hours=random.randrange(15),
minutes=random.randrange(60),
seconds=random.randrange(60),
)
def generate_skyone_data(self) -> SkyoneData:
departure_time = self.generate_departure_time()
return SkyoneData(
email_address=self.generate_email(),
flight_departure_time=departure_time,
iata_departure_code=self.generate_airport_code(),
flight_arrival_time=self.generate_arrival_time(departure_time),
iata_arrival_code=self.generate_airport_code(),
flight_number=f"SKY1{random.randrange(1000)}",
confirmation=f"SKY1{self.generate_string(6)}",
ticket_price=500 + random.randrange(1000),
aircraft=f"Aircraft{self.generate_string(3)}",
booking_agency_email=self.generate_email(),
)
def generate_sunset_data(self) -> SunsetData:
departure_time = self.generate_departure_time()
arrival_time = self.generate_arrival_time(departure_time)
return SunsetData(
customer_email_address=self.generate_email(),
departure_time=departure_time,
departure_airport=self.generate_airport_code(),
arrival_time=self.generate_arrival_time(departure_time),
arrival_airport=self.generate_airport_code(),
flight_duration=int((arrival_time - departure_time).seconds / 60),
flight_id=f"SUN{random.randrange(1000)}",
reference_number=f"SUN{self.generate_string(6)}",
total_price=300 + random.randrange(1500),
aircraft_details=f"Aircraft{self.generate_string(4)}",
)
def generate_items(self) -> typing.List[typing.Union[SkyoneData, SunsetData]]:
skyones = [self.generate_skyone_data() for _ in range(random.randint(1, 3))]
sunsets = [self.generate_sunset_data() for _ in range(random.randint(1, 3))]
return skyones + sunsets
class KafkaClient:
def __init__(self, bootstrap_servers: str) -> None:
self.bootstrap_servers = bootstrap_servers
self.admin_client = self.create_admin()
self.producer_client = self.create_producer()
self.topic_map = {
"Transaction": "transactions",
"Account": "accounts",
"Customer": "customers",
"SmallTransaction": "",
}
def create_admin(self):
return KafkaAdminClient(bootstrap_servers=self.bootstrap_servers, api_version=(2, 8, 1))
def create_producer(self):
return KafkaProducer(
bootstrap_servers=self.bootstrap_servers,
key_serializer=lambda v: json.dumps(v, default=serialize).encode("utf-8"),
value_serializer=lambda v: json.dumps(v, default=serialize).encode("utf-8"),
api_version=(2, 8, 1),
)
def delete_topics(self, topic_names: typing.List[str]):
for name in topic_names:
try:
self.admin_client.delete_topics([name], timeout_ms=1000)
except UnknownTopicOrPartitionError:
pass
except Exception as err:
raise RuntimeError(f"fails to delete topic - {name}") from err
def create_topics(self, topics: typing.List[NewTopic], to_recreate: bool = True):
if to_recreate:
self.delete_topics([t.name for t in topics])
for topic in topics:
try:
resp = self.admin_client.create_topics([topic])
name, error_code, error_message = resp.topic_errors[0]
logging.info(
f"topic created, name - {name}, error code - {error_code}, error message - {error_message}"
)
except TopicAlreadyExistsError:
pass
except KafkaError as err:
raise RuntimeError(
f"fails to create topics - {', '.join(t.name for t in topics)}"
) from err
logging.info(f"topics created successfully - {', '.join([t.name for t in topics])}")
def send_items(self, wait_for: typing.Union[int, float]):
while True:
data_gen = DataGenerator()
items = data_gen.generate_items()
len_sky = len([item for item in items if item.__class__.__name__ == "SkyoneData"])
# print(len_sky)
# print(f"{len_sky} items from sky one and {len(items) - len_sky} from sunset")
logging.info(f"{len_sky} items from sky one and {len(items) - len_sky} from sunset")
for item in items:
try:
if item.__class__.__name__ == "SkyoneData":
topic_name = "skyone"
key = {"ref": item.confirmation}
arrival_time = item.flight_arrival_time
else:
topic_name = "sunset"
key = {"ref": item.reference_number}
arrival_time = item.arrival_time
self.producer_client.send(
topic=topic_name,
key=key,
value=item.asdict(),
)
logging.info(
f"record sent, topic - {topic_name}, ref - {key['ref']}, arrival time - {arrival_time} "
)
except Exception as err:
raise RuntimeError("fails to send a message") from err
logging.info(f"wait for {wait_for} seconds...")
time.sleep(wait_for)
if __name__ == "__main__":
logging.basicConfig(
level=logging.INFO,
format="%(asctime)s.%(msecs)03d:%(levelname)s:%(name)s:%(message)s",
datefmt="%Y-%m-%d %H:%M:%S",
)
parser = argparse.ArgumentParser()
parser.add_argument("--create", action="store_true")
parser.set_defaults(create=False)
args = parser.parse_args()
client = KafkaClient("localhost:29092")
if args.create:
topics = [
NewTopic(name="skyone", num_partitions=5, replication_factor=1),
NewTopic(name="sunset", num_partitions=5, replication_factor=1),
NewTopic(name="flightdata", num_partitions=5, replication_factor=1),
NewTopic(name="userstatistics", num_partitions=5, replication_factor=1),
]
logging.info(f"create topics - {', '.join(t.name for t in topics)}")
client.create_topics(topics, to_recreate=True)
else:
logging.info("skip to create topics...")
# send records
client.send_items(wait_for=1)