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When using `withFetch`, the `PRIMARY_HTTP_BACKEND` token is set. The InMemory Backend services will also set that token. This means that providers order will matter and the latest on the list will be the one instantiated PR Close #52425
62 lines
2.4 KiB
TypeScript
62 lines
2.4 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {XhrFactory} from '@angular/common';
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import {HttpBackend, ɵPRIMARY_HTTP_BACKEND as PRIMARY_HTTP_BACKEND} from '@angular/common/http';
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import {ModuleWithProviders, NgModule, Type} from '@angular/core';
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import {httpClientInMemBackendServiceFactory} from './http-client-in-memory-web-api-module';
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import {InMemoryBackendConfig, InMemoryBackendConfigArgs, InMemoryDbService} from './interfaces';
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@NgModule()
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export class InMemoryWebApiModule {
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/**
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* Redirect BOTH Angular `Http` and `HttpClient` XHR calls
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* to in-memory data store that implements `InMemoryDbService`.
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* with class that implements InMemoryDbService and creates an in-memory database.
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*
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* Usually imported in the root application module.
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* Can import in a lazy feature module too, which will shadow modules loaded earlier
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*
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* Note: If you use the `FetchBackend`, make sure forRoot is invoked after in the providers list
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*
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* @param dbCreator - Class that creates seed data for in-memory database. Must implement
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* InMemoryDbService.
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* @param [options]
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*
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* @example
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* InMemoryWebApiModule.forRoot(dbCreator);
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* InMemoryWebApiModule.forRoot(dbCreator, {useValue: {delay:600}});
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*/
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static forRoot(dbCreator: Type<InMemoryDbService>, options?: InMemoryBackendConfigArgs):
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ModuleWithProviders<InMemoryWebApiModule> {
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return {
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ngModule: InMemoryWebApiModule,
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providers: [
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{provide: InMemoryDbService, useClass: dbCreator},
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{provide: InMemoryBackendConfig, useValue: options}, {
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provide: HttpBackend,
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useFactory: httpClientInMemBackendServiceFactory,
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deps: [InMemoryDbService, InMemoryBackendConfig, XhrFactory]
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},
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{provide: PRIMARY_HTTP_BACKEND, useExisting: HttpBackend}
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]
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};
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}
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/**
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*
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* Enable and configure the in-memory web api in a lazy-loaded feature module.
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* Same as `forRoot`.
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* This is a feel-good method so you can follow the Angular style guide for lazy-loaded modules.
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*/
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static forFeature(dbCreator: Type<InMemoryDbService>, options?: InMemoryBackendConfigArgs):
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ModuleWithProviders<InMemoryWebApiModule> {
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return InMemoryWebApiModule.forRoot(dbCreator, options);
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}
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}
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