2
У меня возникла проблема с получением параметров конфигурации из json-файла до запуска компонентов приложения. Для этих компонентов мне нужны параметры конфигурации.Получить параметры конфигурации перед запуском компонентов
Нет сообщения об ошибке, но app.component.ts не инициируется. Где-то исполнение прекращается. Чтение json отлично работает.
functiontest.dev.config.json
{
"name": "DE164813",
"node-uri": "http://localhost:4000"
}
Config.ts
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { Http, Response } from '@angular/http';
@Injectable()
export class Config {
private _env: Object
constructor(private http: Http) {
}
load() {
return new Promise((resolve, reject) => {
this.http.get('functiontest.dev.config.json')
.map(res => res.json())
.subscribe((env_data) => {
this._env = env_data;
console.log("got env", this._env);
})
});
}
getEnv(key: any) {
return this._env[key];
}
};
app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { DatePickerModule } from 'ng2-datepicker';
import { Config } from './service/Config';
import { APP_INITIALIZER } from '@angular/core';
import {
NgModule,
ApplicationRef
} from '@angular/core';
import {
removeNgStyles,
createNewHosts,
createInputTransfer
} from '@angularclass/hmr';
import {
RouterModule,
PreloadAllModules
} from '@angular/router';
/*
* Platform and Environment providers/directives/pipes
*/
import { ENV_PROVIDERS } from './environment';
import { ROUTES } from './app.routes';
// App is our top level component
import { AppComponent } from './app.component';
import { APP_RESOLVER_PROVIDERS } from './app.resolver';
import { AppState, InternalStateType } from './app.service';
import { HomeComponent } from './home';
import { AboutComponent } from './about';
import { SensorTestComponent } from './sensortest';
import { TestReviewComponent } from './testreview';
import { NoContentComponent } from './no-content';
import { XLargeDirective } from './home/x-large';
import { ContractSelectComponent } from './contractselect/contractselect.component';
// Application wide providers
const APP_PROVIDERS = [
...APP_RESOLVER_PROVIDERS,
AppState
];
type StoreType = {
state: InternalStateType,
restoreInputValues:() => void,
disposeOldHosts:() => void
};
function initConfig(config: Config){
return() => config.load()
}
/**
* `AppModule` is the main entry point into Angular2's bootstraping process
*/
@NgModule({
bootstrap: [ AppComponent ],
declarations: [
AppComponent,
AboutComponent,
HomeComponent,
NoContentComponent,
XLargeDirective,
ContractSelectComponent,
SensorTestComponent,
TestReviewComponent
],
imports: [ // import Angular's modules
BrowserModule,
FormsModule,
HttpModule,
DatePickerModule,
RouterModule.forRoot(ROUTES, { useHash: true, preloadingStrategy: PreloadAllModules })
],
providers: [ // expose our Services and Providers into Angular's dependency injection
ENV_PROVIDERS,
APP_PROVIDERS,
Config,
{
provide: APP_INITIALIZER,
useFactory: initConfig,
deps: [Config],
multi: true
}
]
})
export class AppModule {
constructor(
public appRef: ApplicationRef,
public appState: AppState
) {
}
public hmrOnInit(store: StoreType) {
if (!store || !store.state) {
return;
}
console.log('HMR store', JSON.stringify(store, null, 2));
// set state
this.appState._state = store.state;
// set input values
if ('restoreInputValues' in store) {
let restoreInputValues = store.restoreInputValues;
setTimeout(restoreInputValues);
}
this.appRef.tick();
delete store.state;
delete store.restoreInputValues;
}
public hmrOnDestroy(store: StoreType) {
const cmpLocation = this.appRef.components.map((cmp) => cmp.location.nativeElement);
// save state
const state = this.appState._state;
store.state = state;
// recreate root elements
store.disposeOldHosts = createNewHosts(cmpLocation);
// save input values
store.restoreInputValues = createInputTransfer();
// remove styles
removeNgStyles();
}
public hmrAfterDestroy(store: StoreType) {
// display new elements
store.disposeOldHosts();
delete store.disposeOldHosts;
}
}
app.routes.ts
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home';
import { ContractSelectComponent } from './contractselect/contractselect.component';
import { SensorTestComponent } from './sensortest';
import { TestReviewComponent } from './testreview';
import { AboutComponent } from './about';
import { NoContentComponent } from './no-content';
import { DataResolver } from './app.resolver';
export const ROUTES: Routes = [
{ path: '', component: ContractSelectComponent },
{ path: 'sensortest/:orderId', component: SensorTestComponent },
{ path: 'testreview', component: TestReviewComponent },
{ path: '**', component: NoContentComponent },
];
contractselect.component.ts
import { Component } from '@angular/core';
import { OrderResource } from '../service/OrderResource';
import { ContractSelect } from './contractselect';
import { Order } from '../model/Order';
import { Router } from '@angular/router';
import { NodeResource } from '../service/NodeResource'
import { NodeData } from '../model/NodeData';
@Component({
selector: 'contractselect',
providers: [OrderResource, NodeResource],
templateUrl: 'contractselect.component.html'
})
export class ContractSelectComponent {
//...
constructor(private _orderResource: OrderResource, private _router:Router, private _nodeResource: NodeResource) {
this.orders = new Array<Order>();
this.orderResource = _orderResource;
this.nodeResource = _nodeResource;
// set delay settings
this.delay = 1;
console.log("created ContractSelect Component");
}
// ...
}
вы можете использовать canactivate, который инициализирует сервис с параметрами get –