Kotlin Clean Architecture Backend
Kotlin backend based on the Clean Architecture principles.
The application is separated into three modules: Domain, Usecases and Adapters
- Domain module contains all entities, it's validation and repository interfaces
- Usecases module performs actions on the domain entities and repositories and does authorization
The domain and usecases modules do not have any external dependencies.
- Adapter layer: each adapter is implemented as a standalone module, lowering dependence on specific frameworks and libraries and making them interchangable. The server module consumes all adapters (e.g. databases, (graphql) endpoints, authentication logic)
GraphQL endpoints are auto-generated from the Usecases
Technologies:
Ktor, JWT, Exposed, Flyway, KGraphQL/GraphQL generated endpoints, Gradle.
GraphQL Plaground
Default url: http://localhost:8080/graphql
Login
query Login {
LoginUser(a0: { email: "[email protected]", password: "P@ssw0rd!" })
}
Retrieve current user
query CurrentUser {
AuthenticatedUser {
id
email
authorities
}
}
HTTP Headers
{
"Authorization": "Bearer [TOKEN FROM LOGIN]"
}
Create new user
mutation CreateUser {
CreateUser(
a0: {
email: "[email protected]"
password: "Penait1!"
authorities: [USER]
}
) {
id
email
authorities
}
}
HTTP Headers
{
"Authorization": "Bearer [TOKEN FROM LOGIN]"
}