darrencauthon/autonode

Autonode

Dependency injection for NodeJS inspired by Autofac (C# DI library)

API

Registration

containerBuilder.register(key, instanceFunction, lifetimeScope);
containerBuilder.register(key, classType, lifetimeScope);

Lifetime Scopes

autonode.LifetimeScope.InstancePerRequest
autonode.LifetimeScope.SingleInstance

Example Usage

Basic Usage

let container = autonode.Container;

let containerBuilder = new ContainerBuilder();
containerBuilder.register('logger', () => new Logger(), autonode.LifetimeScope.InstancePerRequest);
containerBuilder.register('userRepository', () => new UserRepository(), autonode.LifetimeScope.InstancePerRequest);
container.load(containerBuilder);

let container = require('./lib/container');

class UserRepository {
  constructor() {
    this.logger = container.resolve('logger');
  }
}

Instance referencing another registration

containerBuilder.register('lineItemRepository', () => new LineItemRepository(), autonode.LifetimeScope.InstancePerRequest);
containerBuilder.register('tripRepository', (c) => new TripRepository(c.resolve('lineItemRepository'), autonode.LifetimeScope.InstancePerRequest);

Automatic constructor injection

containerBuilder.register('lineItemRepository', LineItemRepository, autonode.LifetimeScope.InstancePerRequest);
conatienrBuilder.register('tripRepository', TripRepository, autonode.LifetimeScope.InstancePerRequest);

class TripRepository {
  constructor(lineItemRepository) { // parameter name must match registration key
    this.lineItemRepository = lineItemRepository;
  }
}

class LineItemRepository {
  constructor() { }
}

Access request from anywhere without passing it to every function

containerBuilder.register('request', () => req);
containerBuilder.register('requestAwareTripRepository', (c) => new TripRepository(c.resolve('request')));