This repository shows how you can separate application layers with the help of Gradle. The demo project contains three layers:

• application (Spring Boot Web Application)
• domain (Pure Business Logic)
• adapter (Implements interfaces of domain layer)

Each of the following examples is on its own branch!

By folders

On the folders branch, there is just one folder per layer (without the help of Gradle). This is meant as a starting point for the following examples.

project
  ├─ src/main/java/com/example/demo
  │    ├─ application
  │    ├─ domain
  │    └─ adapter
  └─ build.gradle

Multi-Project build

On the multi-project branch, each layer is a sub project in a Gradle Multi-Project.

project
  ├─ server
  │    ├─ application
  │    │     ├─ src/main/java/com/example/demo/adapter/
  │    │     └─ build.gradle
  │    ├─ domain
  │    │     ├─ src/main/java/com/example/demo/domain/
  │    │     └─ build.gradle
  │    └─ adapter
  │          ├─ src/main/java/com/example/demo/adapter/
  │          └─ build.gradle
  ├─ build.gradle
  └─ settings.gradle

Source Sets

On the source-sets branch, each layer is in its own source set in a single Gradle project.

project
  ├─ src
  │   ├─ application
  │   │     └─ java/com/example/demo/application/
  │   ├─ domain
  │   │     └─ java/com/example/demo/domain/
  │   └─ adapter
  │         └─ java/com/example/demo/adapter/
  └─ build.gradle