Django Channels Tutorial project

Main goal

• Get familiar with Django Channels

Additional goals

• Start using RST for documentation (this file)
• Continue using docker and git

Reflections

• If commits have been pushed to remote, git commit --amend on them can be dangerous.
• docker-compose run ... creates new container. So changes in it (e.g. pip install X) don't get to the "main" container that is run with docker-compose up.
• Related to Channels:
  • Consumer instance is created per connected client
  • Consumer instances can talk to each other using channel_layer
    • Channel layers require something like Redis as a backend (can be set up in settings file)
  • There are two main entities in Channels: channels and groups
    • Channel is like an id of a consumer that allows to manage interactions with other consumers
    • Group is collection of channels that allows easily share events.
    • Event is an activity that can be initiated by one of consumers and trigger specific action by other consumers.
  • Synchronous consumers are less performant.
  • Asynchronous consumers are more perfomant, especially when they don't deal with blocking functions. Calling blocking functions require using helpers from asgiref.