Simple service locator for TypeScript.
EasyTypedDI is a service locator intended to provide dependencies to small projects or for learning purposes. It's specially designed to do not pollute your code with annoying and unconfortable tags or code snippets related to DI. It's a simple solution to keep everything clean and separated.
To install this package... meh, just copy the code and you are good to go. Anyway, you can always run the following command:
npm install easy_typed_di
Let's see really quick how to use this.
To register your dependencies you only need to use register()
function. Register function receives a name for your object and a creator lambda, you can also create singletons by setting singleton
parameter to true (default false). To satisfy any dependency just use the inject()
function
import { register, inject } from 'easy_typed_di/dist/EasyDI'
import { DataBaseManager } from 'src/main/db/manager'
import { MongoDataBaseManager } from 'src/main/db/manager/mongo'
import { UuidGenerator } from 'src/main/uuid/generator'
import { NativeUuidGenerator } from 'src/main/uuid/generator/native'
export const DATABASE_MANAGER = "DatabaseManager"
export const UUID_GENERATOR = "UuidGenerator"
export default function mainModule() {
register<DataBaseManager>(DATABASE_MANAGER, () => new MongoDataBaseManager(inject(UUID_GENERATOR)))
register<UuidGenerator>(UUID_GENERATOR, () => new NativeUuidGenerator())
}
To provide your dependencies you only have to use inject()
function which expects the name of your dependency.
export default class ProfileApplication extends Application {
private databaseManager: DatabaseManager
private uuidGenerator: UuidGenerator
private sessionReceiver: CommunicationDevice
private networkController: CommunicationDevice
private networkService: CommunicationDevice
public constructor() {
super()
this.initDependencies()
this.databaseManager = inject(DATABASE_MANAGER)
this.uuidGenerator = inject(UUID_GENERATOR)
...
}
private initDependencies() {
mainModule()
}
...
}
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