DSI Dev Sessions - REST APIs and Microservices

REST APIs Demo

It is in a separate branch called movies-service. Just clone this project and git checkout -b movies-service origin/movies-service

Microservices Demo

Pre-requirements

1. Internet is required for this demo
2. install docker

Running the demo

Just run the following command in this folder docker-compose up

This will start the following services:

• batman-service and star-service (./movies-service)
  • Service with /movies endpoint that loads the database with movies from omdbapi based on a environment variable MOVIE_NAME (defaults to superman)
• ratings-service (./rating-service)
  • POST to /ratings with {movie : 1, rating : 2}
    • postman collection here or curl -X POST -H "Content-Type: application/json" -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyMSJ9.FxP_NNi2BrJe0jObxXb4_1YUSikvxOAZSdXUZWDG1vU" -d '{"rating": 2, "movie": 1}' "http://localhost:8000/ratings-service/ratings"
    • you can generate other JWT (Authorization Bearer) for different users at https://jwt.io using secret 123
  • GET of /ratings/{movieId} to get average rating
• service-discovery
  • Launches a consul instance for service registry and discovery
    • Exposed to host at http://localhost:8500
• api-gateway
  • Exposed to host at http://localhost:8000
  • Available endpoints:
    • http://localhost:8000/movies
      • proxies to movies-service which round-robins to batman-service or star-service.
    • http://localhost:8000/movies/names
      • returns an array with only the movie names which round-robins to batman-service or star-service.
    • http://localhost:8000/movies/1
      • agregates info from movie-service and rating-service
  • All the services above are available at http://localhost:8000/{service-name}
    • example http://localhost:8000/movies-service/movies
• zipkin-server
  • Show request tracing from api-gateway to all services
  • Exposed to host at http://localhost:8502/
• hystrix-dashboard
  • Show api-gateway circuits and their statuses
  • Exposed to host at http://localhost:8501