Asynchronous tasks in Python with Celery + RabbitMQ + Redis

Overview

python-asynchronous-tasks

Setup & Installation

Create a virtual environment and install the dependencies:

$ python -m venv venv
$ source env/bin/activate

$ pip install -r requirements.txt

Start redis and rabbitmq services with docker-compose:

docker-compose up -d

Verify that the services are up and running:

$ docker ps

# Excepted output
27d1b8ced89a   rabbitmq:latest   "docker-entrypoint.s…"   8 minutes ago   Up 8 minutes   4369/tcp, 5671/tcp, 15691-15692/tcp, 25672/tcp, 0.0.0.0:5672->5672/tcp, :::5672->5672/tcp   python-async-tasks_rabbitmq_1
17b72947fb8a   redis:latest      "docker-entrypoint.s…"   8 minutes ago   Up 8 minutes   0.0.0.0:6379->6379/tcp, :::6379->6379/tcp                                                   python-async-tasks_redis_1

Usage

Spin up a new terminal and start the celery worker:

$ celery -A tasks worker -l info --pool=solo

Send a task to celery worker to verify that it's working as excepted: Open a new terminal and get inside python interactive shell, import say_hello function from tasks.py and then call it with delay()

$ python
>>> from tasks import say_hello
>>> say_hello.delay("Valon")
<AsyncResult: 5711efdc-17c7-4f02-bfba-d193c3d28c42>

And in the celery terminal that we started the worker before we should except a result similar to:

INFO/MainProcess] Received task: tasks.say_hello[5711efdc-17c7-4f02-bfba-d193c3d28c42]
INFO/MainProcess] Task tasks.say_hello[5711efdc-17c7-4f02-bfba-d193c3d28c42] succeeded in 5.01600000000326s: 'Hello Valon'

What to do next?

Just expand the usage of the celery, define your tasks and keep doing amazing stuff :)

Contact:

If you have any questions regarding the topic or anything else, feel free to reach to me on:

License

This project is licensed under the terms of the MIT license.

Owner
Valon Januzaj
Back-end Engineer
Valon Januzaj
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