./mvnw install && ./mvnw spring-boot:run -pl application

or

./mvnw install && java -jar application/target/application-1.0.0-SNAPSHOT.jar

The project consists of 4 modules adapter, usecases, domain, and application.

This module contains the domain entities. There are no dependencies to frameworks and/or libraries.

This module contains the business rules that are essential for our application (Application business rules). The only dependency of this module is to domain. In this module, gateways for the repositories are being defined. Each use case defines the interface of the gateway that is required following the ISP. These gateways, operate on the domain entities defined in domain.

This module contains the implementation of the gateways defined in the usecases module. This module depends on the framework that facilitates the data access. In our example, we use JPA and Spring Data. The Jpa*Repository classes are the actual implementation of the gateways defined in the usecases module.

These repositories, use the Spring Data JpaRepository as dependencies. The entities in this module, are JPA entities, so mappings to and from these and the domain entities are needed.

This module contains all the details of the delivery mechanism that we use along with the wiring of the app and the configurations. In our example, we use rest services built with Spring Boot. Similarly, to the JPA entities of the adapter module, the DTOs have mappers, to convert from and to the domain entities.