REST API Sample Application

Requirements

• Docker
• Docker Compose

Usage

• make help Display help, and the most useful Makefile targets
• make start Build all containers and start the services
• make start_debug Build container with the application and a debugger
• make stop Stop all containers
• make app Build application container
• make app_debug Build application and debugger container
• make clean Remove any existing containers and volumes of the application
• make openapi_validate Validate the OpenAPI specification file
• make openapi_editor Start the Swagger Editor (http://localhost:18081/)

API endpoints

• curl http://localhost:18080/-/live Check if the service is up
• curl http://localhost:18080/-/health Check if the service and its dependencies are up
• curl http://localhost:18080/-/metrics Prometheus metrics
• curl http://localhost:18080/users Return all users
• curl http://localhost:18080/users/1 Return the user with ID 1
• curl -H 'Content-type: application/json' http://localhost:18080/users -d '{"name":"new user"}' Add a new user

Testing

• make test Run all tests. Use the TAGS argument to pass specific tags (e.g. make TAGS=api test)

Migrations

All database migrations should be backward compatible, so only the up ones are needed. The migrations library supports the down ones though, in case you want to play with fire :)

See MIGRATIONS.md for more details.

Architecture

┌─────────────┐          ┌─────────────┐          ┌─────────────┐          ┌─────────────┐
│             ├─────────▶│             │─────────▶│    User     │─────────▶│             │
│HTTP Handlers│          │User Service │          │ Repository  │          │  Database   │
│             │◀─────────┤             │◀─────────│             │◀─────────┤             │
└─────────────┘          └─────────────┘          └─────────────┘          └─────────────┘

License

• MIT