Angular2 DI - initializing multiple different instances in the same constructor

Question

I have an Angular2 DI question. Say I have a TestService and I want to use 2 different instances of this service inside the same component. If I simply add a pr

Answer 1

You can inject a factory that returns a new instance every time you call it:

@NgModule({
   providers: [{
      provide: 'testService', 
      useFactory: (/* TestService deps here like `http`*/) => 
        (/* params */) => new TestService(/* http */), 
      deps: [/* TestService deps here like `Http`*/ ]
    }]
})


@Component(...)
export class TestComponent implements OnInit {

    constructor(@Inject('testService') private _testServiceFactory) { };

    ngOnInit() {
        console.log("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", this._testServiceFactory( /* params */).toString());
        console.log("BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB", this._testServiceFactory().toString());
    }
}

Plunker example (check the output in the browser console when you click the button)