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Django 3 By Example

You're reading from   Django 3 By Example Build powerful and reliable Python web applications from scratch

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Product type Paperback
Published in Mar 2020
Publisher Packt
ISBN-13 9781838981952
Length 568 pages
Edition 3rd Edition
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Concepts
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Author (1):
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Antonio Melé Antonio Melé
Author Profile Icon Antonio Melé
Antonio Melé
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Table of Contents (17) Chapters Close

Preface 1. Building a Blog Application 2. Enhancing Your Blog with Advanced Features FREE CHAPTER 3. Extending Your Blog Application 4. Building a Social Website 5. Sharing Content on Your Website 6. Tracking User Actions 7. Building an Online Shop 8. Managing Payments and Orders 9. Extending Your Shop 10. Building an E-Learning Platform 11. Rendering and Caching Content 12. Building an API 13. Building a Chat Server 14. Going Live 15. Other Books You May Enjoy
16. Index

Enabling a channel layer

Channel layers allow you to communicate between different instances of an application. A channel layer is the transport mechanism that allows multiple consumer instances to communicate with each other and with other parts of Django.

In your chat server, you plan to have multiple instances of the ChatConsumer consumer for the same course chat room. Each student who joins the chat room will instantiate the WebSocket client in their browser, and that will open a connection with an instance of the WebSocket consumer. You need a common channel layer to distribute messages between consumers.

Channels and groups

Channel layers provide two abstractions to manage communications: channels and groups:

  • Channel: You can think of a channel as an inbox where messages can be sent to or as a task queue. Each channel has a name. Messages are sent to a channel by anyone who knows the channel name and then given to consumers listening on that...
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