Type Script Get sychronous data from server

Question

I have a problem with control flow in my method. How can I wait for data from the server?Is it possible to prepare data in constructor of service, and get it in singleton in all Components after inject?

import { Permission } from '../_models/Permission';
import { Injectable, OnInit } from "@angular/core";
import { AuthService, AppHttpService } from '../_services/index';
import { RequestActionType } from '../_models/RequestActionType';


@Injectable()
export class PermissionService {

    private getUrl: string = "/Permission/GetAllPermissions";
    private permissions: Permission[] = [];

    constructor(private httpService: AppHttpService, private authService: AuthService) {

        this.PreparePermissionData();
    }

    public PreparePermissionData() {
        if (this.authService.loggedIn()) {
            this.httpService.authGet(this.getUrl).then(response => {
                this.permissions = response.Data as Permission[];
            });
        }

Possible duplicate of [Angular 2 - Return data directly from an Observable](http://stackoverflow.com/questions/37867020/angular-2-return-data-directly-from-an-observable) — jonrsharpe, May 06 '17 at 13:59
Also there's a whole section in the tutorial about getting data over HTTP (https://angular.io/docs/ts/latest/tutorial/toh-pt6.html). — jonrsharpe, May 06 '17 at 14:00
Possible duplicate of [How do I return the response from an Observable/http/async call in angular2?](http://stackoverflow.com/questions/43055706/how-do-i-return-the-response-from-an-observable-http-async-call-in-angular2) — AT82, May 06 '17 at 16:35
take a look at my angular concepts repo hope that helps you in some of the issues - https://github.com/rahulrsingh09/AngularConcepts — Rahul Singh, May 07 '17 at 06:17

score 0 · Answer 1 · answered May 06 '17 at 14:03

import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';
import {Observable} from 'rxjs/Observable'

 export class MyService {
   private getUrl:string = "/Data/GetData"
   constructor(private http: Http) { }

   public DoSomething(){
     let myData = [];

     this.http.get(this.getUrl).map(res => res.json()).subscribe(data => {
        this.somethingWithData(data)
     });

  } 
  public somethingWithData(data) {
    //do anything here with data
  }
}

Cienia · Answer 2 · 2017-05-07T06:13:20.940

0

Is it possible to prepare data in constructor of service, and get it in singleton in all Components after inject?

edited May 07 '17 at 06:13

answered May 06 '17 at 19:14

Cienia

1
1

Type Script Get sychronous data from server

2 Answers2