Example of wiring from Matchstick Video

matchstick-video-wire.go

// CreateServerFactory injects all the dependencies needed to create
// http.ServerFactory
func CreateServerFactory(source goConfig.Source) (http.ServerFactory, error) {
	// Each "tap" below indicates a level of dependency
	configStore, err := config.NewStoreImpl(
		source,
	)
	if err != nil {
		return nil, err
	}
	errorParser := adapterDb.NewErrorParserImpl()

	// --- NEXT TAP ---
	helperService := sql.NewHelperServiceImpl(errorParser)
	databaseService, err := db.NewDatabaseServiceImpl(
		configStore,
	)
	if err != nil {
		return nil, err
	}
	inventoryItemConstructor := entity.NewInventoryItemConstructorImpl()
	muxWrapper := mux.NewWrapperImpl()
  //...