initial commit

examples/celery-rabbit-example/.gitignore

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+!.env

examples/celery-rabbit-example/Dockerfile

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+FROM python:3.8.6-buster
+
+ENV PYTHONFAULTHANDLER=1 \
+  PYTHONUNBUFFERED=1 \
+  PYTHONHASHSEED=random \
+  PYTHONDONTWRITEBYTECODE=1 \
+  # pip:
+  PIP_NO_CACHE_DIR=off \
+  PIP_DISABLE_PIP_VERSION_CHECK=on \
+  PIP_DEFAULT_TIMEOUT=100
+
+RUN apt-get update \
+  && apt-get install --no-install-recommends -y \
+    bash \
+    build-essential \
+    curl \
+    gettext \
+    git \
+    libpq-dev \
+    nano
+
+WORKDIR /code
+
+# Copy and install dependencies:
+COPY requirements.txt /code/
+RUN python -m pip install --upgrade pip
+RUN pip install --no-cache-dir -r /code/requirements.txt
+
+# Copy source files:
+COPY . /code/
+# COPY app.py /code/
+
+
+

examples/celery-rabbit-example/README.md

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+# celery first example
+
+Steps:
+1. Run `docker-compose up`
+2. Show logs
+3. In a new terminal run `docker-compose exec worker python`

examples/celery-rabbit-example/celery_config/__init__.py

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+# from app_celery import app as my_celery_app
+#
+# __all__ = ('my_celery_app', )

examples/celery-rabbit-example/celery_config/app_celery.py

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+from celery import Celery
+from pathlib import Path
+from decouple import AutoConfig
+
+BASE_DIR = Path.cwd().parent
+config = AutoConfig(search_path=BASE_DIR.joinpath('config'))
+
+
+RABBITMQ_DEFAULT_USER = config('RABBITMQ_DEFAULT_USER')
+RABBITMQ_DEFAULT_PASS = config('RABBITMQ_DEFAULT_PASS')
+RABBITMQ_PORT = config('RABBITMQ_PORT', cast=int, default=5672)
+RABBITMQ_HOST = config('RABBITMQ_HOST')
+
+
+app_celery_instance = Celery(
+    'tasks',
+    broker='amqp://{login}:{password}@{host}:{port}'.format(
+        login=RABBITMQ_DEFAULT_USER,
+        password=RABBITMQ_DEFAULT_PASS,
+        host=RABBITMQ_HOST,
+        port=RABBITMQ_PORT,
+    ),
+    # TODO: try to get async results with and without backend configured
+    backend='rpc://',
+)

examples/celery-rabbit-example/config/.env

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+# RabbitMQ settings:
+
+RABBITMQ_DEFAULT_USER=rabbit_admin
+RABBITMQ_DEFAULT_PASS=mypass
+RABBITMQ_PORT=5672
+RABBITMQ_HOST=rabbitmq_host

examples/celery-rabbit-example/docker-compose.yml

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+version: '3.7'
+
+services:
+
+  rabbitmq:
+    hostname: rabbitmq_host
+    image: 'rabbitmq:3.8.18-management-alpine'
+    container_name: first_rabbit
+    env_file: config/.env
+    restart: unless-stopped
+    ports:
+      - 8080:15672
+      - 5672:5672
+
+  worker:
+    container_name: first_celery
+    build: .
+    command: celery --app=my_app:app_celery_instance worker --loglevel=INFO
+    env_file: config/.env
+    depends_on:
+      - rabbitmq
+    restart: unless-stopped
+
+networks:
+  default:
+    name: celery_network
+    driver: bridge
+

examples/celery-rabbit-example/my_app.py

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+from celery_config.app_celery import app_celery_instance
+
+
+@app_celery_instance.task
+def add(first: int, second: int) -> int:
+    print(first + second)
+    return first + second
+
+
+# TODO: try with `@app.task(throws=(ZeroDivisionError,))`
+@app_celery_instance.task
+def div(first: int, second: int) -> float:
+    # TODO: show how errors work
+    return first / second

examples/celery-rabbit-example/requirements.txt

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+celery==5.0.2
+python-decouple==3.3