Ports And Adapters Golang

An example project of Golang + Ports and Adapters structure on top of https://github.com/golang-standards/project-layout and https://github.com/yuraxdrumz/golang-starter-kit

Getting Started

1. git clone [email protected]/yuraxdrumz/ports-and-adapters-golang
2. Create database folder project's root for sqlite adapter
3. go mod init
4. go run main.go

Prerequisites

Ports and Adapters divides your code to 3 parts:

• Business-logic - These are your business rules + types, implemented without any dependency on 3rd party modules (self-contained)
• Ports - Interfaces to speak with your business rules
• Adapters - Implementations of the ports, There are two kinds of adapters:
  • In(Driver) - your external API to the world. For example - internal/pkg/adapters/in/http.go
  • Out(Driven) - what your business logic uses. For example - internal/pkg/adapters/out/reverser/in-memory.go

Usually, you divide ports and adapters to separate directories, but the best practice in golang is to keep structs near implementations. That is why, I decided to add ports.go near each adapter.

Adding a new business logic:

1. Create appropriate ports in ports.go file under internal/app/your-use-case/ports.go
2. Create your use-case with your application specific logic under internal/app/your-use-case/logic.go
3. Create your in/out adapter, for example - Repository(out) or gRPC(in). internal/pkg/adapters/*
4. Tests!!! your-file-name_test.go under same directory as file internal/app/your-use-case/logic_test.go