Franz

A lite wrapper around Kafka and RabbitMQ.

Usage

Installation

• pip install franz (recommended)
• pip -e git+git@github.com:eshares/franz.git@master#egg=franz
  • Change @master to a version or commit if required.

RabbitMQ

Sending a message

import random
import time

import franz


class FranzData(franz.FranzEvent):
    def serialize(self):
        return {'data': time.time()}


with franz.RabbitProducer(exchange='topic_link') as p:
    while True:
        key = random.choice(['hello.world', 'hello.bob'])
        p.send_message(key, FranzData())
        time.sleep(1)

Consuming messages

import franz

def callback(ch, method, properties, body):
    print('[+] {} from {}'.format(body, method.routing_key))

with franz.RabbitConsumer('hello.*', exchange='topic_link') as c:
    c.consume_messages(callback)

Kafka

Sending a message

import franz
from myapp.models import SomeModel  # SomeModel must inherit `franz.FranzEvent`

instance = SomeModel.objects.get(pk=1)
producer = franz.KafkaProducer()
producer.send_message('TopicA', instance)

Consuming messages

import franz

consumer = franz.KafkaConsumer('TopicA')
for message in consumer:
    print(message.value)

Kafka/Docker Resources

• Docker image
• Helpful article
• Create topic

./kafka-topics.sh --create --topic test --replication-factor 1 --partitions 1 --zookeeper 0.0.0.0:2181

• Consuming

./kafka-console-consumer.sh --topic test --from-beginning --zookeeper 0.0.0.0:2181

• Producing

./kafka-console-producer.sh --topic test --broker-list 0.0.0.0:9092

Testing

# setup versions
pyenv install 3.5.3
pyenv install 3.6.3
pyenv install 3.7.0
pyenv virtualenv franz 3.5.3
pyenv local franz 3.5.3 3.6.3 3.7.0
pip install -r requirements-dev.txt

# run tests (python 3.5, 3.6, 3.7)
tox