Galex

Django app deployed on production:

http://protected-journey-8694.herokuapp.com/

Full Stack:

• FrontEnd, UI: jQuery, Ajax, HTML/CSS
• Middlewear, API: Django Rest Framework
• Backend: PostGre (Prod), SQLite3 (Dev)

Environment:

• Python virtualenv
• Heroku App Deployment Cloud (versioning: requirements.txt and Running the server: Procfile)
• Gunicorn WebServer

Model, Template, Views:

• https://github.com/cjgiridhar/galex/blob/master/journal/models.py
• https://github.com/cjgiridhar/galex/tree/master/journal/templates/journal
• https://github.com/cjgiridhar/galex/blob/master/journal/views.py

Admin Page

• Used it to create users and add articles
• https://github.com/cjgiridhar/galex/blob/master/journal/admin.py

Rest APIs:

• List: http://protected-journey-8694.herokuapp.com/api/articles/
• Detail: http://protected-journey-8694.herokuapp.com/api/articles/1/
• JSON Serializer: https://github.com/cjgiridhar/galex/blob/master/journal/serializers.py
• Docs: http://protected-journey-8694.herokuapp.com/docs/

Exception Handling and Logging:

• https://github.com/cjgiridhar/galex/blob/master/journal/views.py
• Default level: Debug (Not to be done on Prod but added here for getting logs of heroku)
• Exceptions like: Http404, ObjectDoesNotExist used

Non Functional Requirements:

• Performance: File based caching of views (Article list refreshed every 10 mins and Detail every 15 mins), Template fragmented caching for sidebar
• Scaling: Gunicorn works on multiple worker processes (eliminates GIL), Setting on Heroku dynamo is WEB_CONCURRENCY=3
• Memory Handling: Used --max-requests 1200 on unicorn to restart a worker once 1200 requests are done
• Async requests: Could also work with gevent (greenlets) for better handling of I/O requests
• Throttling of Requests: UserRateThrottle for Rest APIs

Testing:

• 3 tests added for adding, reading articles and comparing data
• https://github.com/cjgiridhar/galex/blob/master/journal/tests.py

To be done

• Security: Authentication, Authorization for Rest APIs & CSRF token
• Template inheritance can be done & carousel to be added in What Read Next