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Weather Application (Complete Code)

Napkin Diagram

Architecture Diagram

Technologies Used

1. Frontend - Angular
2. API gateway - Express Node JS
3. Authentication Service - Google Authentication OAuth2, JWT (JSON Web Token) .
4. Data retrieval and Plotting - Fast API Python, AWS S3.
5. User History Service - Spring Boot Java, MySQL
6. Profile service - Node JS, Mongo DB
7. Communication Protocol - REST API

Services

1. API Gateway

• The gateway acts as the single point of contact for the frontend service and connects multiple microservices at the backend through REST APIS.

• Connecting microservices -

  1. Authentication Service
  2. Profile Service
  3. Radar Service
  4. User History

2. Authentication Service

• The authentication service handles user registration, login and Google OAuth2 Sign-in. It handles the user session by using JWT which is passed from backend to frontend in the form of httpOnly cookie.

• Connecting microservices -

  1. Gateway Service
  2. Profile Service

3. Profile Service

• The profile service is responsible for creating and updating user profiles received from Auth Service. It uses MongoDB for user profile storing and retrieving.

• Connecting microservices -

  1. Gateway Service
  2. Authentication Service

4. Radar Service

• The service fetches data from Nexrad data source (AWS S3) and generates a reflectivity graph which is then stored in the database using User History service

5. User History

• This service stores the data which is currently searched by the user