This is an example micro service built with Python as a hack day experiment.

• RESTful microservice
• API documentation in Swagger (OpenAPI)
• CQRS splitting read and update operations
• Updates are queued into RabbitMQ for eventual consistency
• Data persisted in Cassandra

You will need the following dependencies

• Python 3.6
• Docker, Docker Compose

I recommend using virtualenv or similar to manage your python environment. Either way, you need to eventually pull the python packages you need which you can do by running pip

pip install -r requires.txt

The downstream dependencies (Cassandra and RabbitMQ) are hosted in containers and are defined in the docker-compose.yml file. To start the containers, simply invoke docker compose like this

docker-compose up

To create the message queues, cassandra key space and tables, use the following python scripts

python src/setup/cass.py
python src/setup/rabb.py

To start the REST api service, use connexion

connexion run swagger/recipes.yml -v --debug

You can then view the swagger UI at localhost:5050/ui

• Update service
• Development environment in docker

• DI
• Unit tests
• Resilience
• Move connection settings into ENV