Full Stack Development with JHipster - Second Edition

Angular services for the entity

The ProductService is an Angular service that interacts with our REST endpoints, and is created in product.service.ts:

@Injectable({ providedIn: 'root' })export class ProductService {    private resourceUrl = SERVER_API_URL + 'api/products';    constructor(private http: HttpClient) { }    ...    query(req?: any): Observable<EntityArrayResponseType> {        const options = createRequestOption(req);        return this.http.get<IProduct[]>(            this.resourceUrl,             { params: options, observe: 'response' }        );    }    ...}

As you can see, the service has a constructor with dependencies that are injected following a similar pattern as our server-side code. There are methods mapping all the CRUD actions to the backend REST resource. The HTTP calls make ...