Homework for backend chapter

Create an API with the following features:

1. start consuming weather data with an optional city filter;
2. stop consuming weather data;
3. fetch already collected weather data points;
4. see the collected temperature measurements in CloudWatch.

Use any tech stack you are most comfortable with, although NodeJS is preferred.

Weather service

The weather data you will be consuming is provided by a mock weather service that is part of this repository. The service simulates real-time weather data streaming and is prepared specifically for this homework assignment.

To get the weather data call GET /weather-data. The data is streamed as a JSONL in the following format:

{"city": string, "temperature": float}

GET /weather-data also accepts a query parameter cities to only get the data for the specified cities. The parameter value is a comma-separated case-insensitive list of city names.

The fastest way to test the service is with docker:

docker build -t weather-service https://github.com/carVertical/homework-backend.git
docker run --rm -p 3000:3000 weather-service

Or as a less ephemeral approach with docker compose:

services:
  weather-service:
    build: https://github.com/carVertical/homework-backend.git
    ports:
      - "3000:3000"
    environment:
      ITEMS_PER_SECOND: 10000 # change this value to test different scenarios

Then call the service:

curl --silent 'http://localhost:3000/weather-data'