angel_container 1.0.0-alpha.7 angel_container: ^1.0.0-alpha.7 copied to clipboard
A better IoC container and dependency injector for Angel, ultimately allowing Angel to be used without dart:mirrors.
import 'package:angel_container/angel_container.dart';
import 'package:angel_container/mirrors.dart';
void main() {
// Create a container instance.
var container = new Container(MirrorsReflector());
// Register a singleton.
container.registerSingleton<Engine>(Engine(40));
// Register a factory that creates a truck.
container.registerFactory<Truck>((container) {
return _TruckImpl(container.make<Engine>());
});
// Use `make` to create an instance.
var truck = container.make<Truck>();
// Should print: 'Vroom! I have 40 horsepower in my engine.'
truck.drive();
// We can make a child container with its own factory.
var childContainer = container.createChild();
childContainer.registerFactory<Truck>((container) {
return _TruckImpl(Engine(5666));
});
// Make a truck with 5666 HP.
childContainer.make<Truck>().drive();
// However, calling `make<Engine>` will return the Engine singleton we created above.
print(childContainer.make<Engine>().horsePower);
}
abstract class Truck {
void drive();
}
class Engine {
final int horsePower;
Engine(this.horsePower);
}
class _TruckImpl implements Truck {
final Engine engine;
_TruckImpl(this.engine);
@override
void drive() {
print('Vroom! I have ${engine.horsePower} horsepower in my engine.');
}
}