interview-app-srv

Golang monorepo with REST, gRPC, CQRS, opentelemetry, gorillaMUX, swag, mailhog and rabbitMQ

based on docker containers, docker compose, Makefile

Topics Covered

• REST, gRPC, CQRS, Docker, distributed tracing (jaeger, otel, prometheus,grafana, NewRelics), testify
• Onion, Clean architecture, Monorepo,
• Swagger, Postman docs (/docs directory)
• JWT , auth and logging middleware
• Env with Viper
• hot reload with cosmtrek/air
• golangcilint, pre-commit-hooks
• MySQL, database/sql, gorm
• Redis
• MongoDB
• Jenkins, GitHub actions Plans:
• .gitlabci, buildspec
• mockery for testify, more tests

Services:

• API Gateway

  • Backend For Frontend approach, gateway takes HTTP requests and decide which service over gRPC should be called
    • security & Auth methods
      • Basic Auth
      • Bearer Token
      • API key
      • JWT
    • HTTP Handlers based on GorillaMux
    • Router with middlewares
      • content_type
      • correlation_id
      • CORS
      • JWT Token decode
      • request_log
    • CQRS
      • separated commands and queries that connect to specific services
        • example commands: signup, change_password
        • example queries: sign_in, user_details, get_verification_code

• Auth service

  • gRPC server for commands:
    • SignIn
    • SignUp
    • Verify account code
  • Service layer to manage data flow
    • rpc -> service -> repositories -> clients
  • Redis cache to prevent eventual consistency
  • MongoDB for users & logs storage
  • MySQL as main RDBMS for users
  • RabbitMQ direct queue with dead letter exchange for email sendout

• User service

  • gRPC server for commands
    • get user(id)
    • get user details
    • change password
  • Mysql repository based on gORM
  • Redis cache for cacheable users

• Consumer service

  • AMQP consumer that read events from rabbitMQ, send emails and store logs in mongoDB

• Tester service

  • workers pool service that constantly creates users from registration, activation and signIn for JWT Tokens
  • optional daisy chain pattern for concurrency controll

Build

make build

make up

Run tests

make test_unit

make test_integration

gRPC

• make proto

Credentials

services

• interview@interview.com:VeryG00dPass!

screenshots: