angolare 2 Resolve Servizio Prima Bootstrap

Question

http://plnkr.co/edit/yhQQZxTxB8ZVFysqO6lP?p=preview

Come posso assicurare il mio AuthService viene risolto prima che venga caricato AppComponent?

//main entry point 
import {bootstrap} from '@angular/platform-browser-dynamic'; 
import {Http,HTTP_PROVIDERS} from '@angular/http'; 
import {App} from './app'; 
import {AuthService} from './auth.service'; 
import {provide, enableProdMode, APP_INITIALIZER} from '@angular/core'; 

bootstrap(App, [HTTP_PROVIDERS, 
provide("isLoggedIn", { useFactory: (auth:AuthService) =>() => auth.login(), deps:[HTTP_PROVIDERS], multi: true }), 
]) 
    .catch(err => console.error(err)); 

Answer 1

È possibile utilizzare APP_INITIALIZER token per fornire l'authFactory:

//main entry point 
import {bootstrap} from '@angular/platform-browser-dynamic'; 
import {Http,HTTP_PROVIDERS} from '@angular/http'; 
import {App} from './app'; 
import {AuthService} from './auth.service'; 
import {provide, enableProdMode, APP_INITIALIZER} from '@angular/core'; 

export function authFactory(auth: AuthService){ 
    return auth.login() 
} 

bootstrap(App, [ 
    HTTP_PROVIDERS, 
    { 
     provide: APP_INITIALIZER, 
     useFactory: (auth), 
     deps: [AuthService], 
     multi: true 
    } 
]).catch(err => console.error(err));