Simple service locator infrastructure for swift
ServiceLocator
Simple service locator infrastructure. Pass around protocols backed by these locators to your view
controllers and coordinators to simplify dependency injection.
Basic Example
/// Services available in the app scope.
protocol AppServices {
var myAppScopedService: MyAppScopedServiceProtocol { get }
var otherAppScopedService: OtherAppScopedServiceProtocol { get }
}
/// Production implementation of `AppServices`.
class ProdAppServices: ServiceLocator, AppServices {
var myAppScopedService: MyAppScopedServiceProtocol {
singleton { MyAppScopedServiceImpl(other: otherAppScopedService) }
}
…
var otherAppScopedService: OtherAppScopedServiceProtocol {
singleton { OtherAppScopedServiceImpl() }
}
}
Scopes
Compose service locators to provide isolation amongst domains.
Broad Rules
- Parent scopes must not access services from child scopes
- Child scopes can access services from parent scopes
- Child scopes must not access services/data from sibling scopes
Example
/// Services available in the user scope.
protocol UserServices {
var myUserScopedService: MyUserScopedServiceProtocol { get }
}
/// Production implementation of `UserServices`.
class ProdUserServices: ChildServiceLocator<ProdAppServices>, UserServices {
var myUserScopedService: MyUserScopedServiceProtocol {
singleton {
UserScopedServiceImplementation(parentService: parent.myAppScopedService)
}
}
}