DI

A Ktor application plugin for managing the registration and resolution of module dependencies.

The following properties are configurable:

1. provider: the logic for registering new types

2. resolution: the function for validating the provided types and creating the dependency map

3. reflection: controls how objects are initialized from type references

You can declare dependencies using the dependencies DSL:

fun Application.databaseModule() {
    dependencies {
        provide<Database> { PostgresDatabase(resolve("connectionUrl")) }
    }
}

Or through configuration:

ktor:
  application:
    dependencies:
      - com.example.db.PostgresDatabase

Each item declared via configuration can be a reference to a class or a top-level function.

Resolving dependencies in application modules is also achieved through the DSL:

fun Application.routing() {
    val database: Database by dependencies
    val repository: MessagesRepository = dependencies.create()
}

Alternatively, they can be supplied automatically through parameters.

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