Isolating a service from a component based on conditions in Angular 5

Question

Isolating a service from a component based on conditions in Angular 5

Within my root module, I have a service that is shared among all components. One of these components is named ComponentX

module

providers: [
    BiesbroeckHttpService
],

component

constructor(private biesbroeckHttpService: BiesbroeckHttpService){}

Sometimes, depending on a variable's value within ComponentX, I need to isolate the service to prevent it from using the shared instance in the module. This is necessary for running parallel subscriptions.

Despite hours of searching and attempts, I am still unsure how to achieve this.

I would greatly appreciate any help or guidance you can provide.

angular typescript

Answer 1

Answer №1

While this solution may not be the most elegant, it could be a viable option. A suggestion is to create an additional service class that extends your BiesbroeckHttpService.

@Injectable()
export class ExtraService extends BiesbroeckHttpService {}

Next, in your component, use ExtraService as the token, but define BiesbroeckHttpService as the provider.

@Component({
    providers: [
        {
            provide: ExtraService,
            useClass: BiesbroeckHttpService
        }
    ]
})
export class MyComponent {
    constructor(
        private componentService: ExtraService,
        private singletonService: BiesbroeckHttpService
    ){
        // The component now has access to both a component instance and the singleton instance
    }
}

You can view a demonstration of this concept on StackBlitz.

It's important to note that if sub components of MyComponent require access to the instance of MyComponent, they should inject ExtraService instead of BiesbroeckHttpService.

Answer 2

While this solution may not be the most elegant, it could be a viable option. A suggestion is to create an additional service class that extends your BiesbroeckHttpService.

@Injectable()
export class ExtraService extends BiesbroeckHttpService {}

Next, in your component, use ExtraService as the token, but define BiesbroeckHttpService as the provider.

@Component({
    providers: [
        {
            provide: ExtraService,
            useClass: BiesbroeckHttpService
        }
    ]
})
export class MyComponent {
    constructor(
        private componentService: ExtraService,
        private singletonService: BiesbroeckHttpService
    ){
        // The component now has access to both a component instance and the singleton instance
    }
}

You can view a demonstration of this concept on StackBlitz.

It's important to note that if sub components of MyComponent require access to the instance of MyComponent, they should inject ExtraService instead of BiesbroeckHttpService.

Answer 3

Answer №2

To address the unique scenario, I suggest creating a separate service specifically for that case. Then, implement an if statement within the component to determine which service should be utilized.

Answer 4

To address the unique scenario, I suggest creating a separate service specifically for that case. Then, implement an if statement within the component to determine which service should be utilized.

Isolating a service from a component based on conditions in Angular 5

Answer №1

Answer №2

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