send information from a service's observable method to an unrelated component

Question

send information from a service's observable method to an unrelated component

service.ts

@Injectable({
  providedIn:'root'
})

export class textAppService{
  constructor(private http: HttpClient){}

  getPersonDetail(id:any):Observable<any>{
    return id? this.http.post(ur;, {id:id}):of(new personDetails());
  }
}

· In order to optimize time efficiency, you want to pass the data retrieved from the getPersonDetail() method to a separate, unrelated component's TypeScript file. However, calling the getPersonDetail() service directly is not feasible in this scenario. One solution could be to set the data obtained from getPersonDetail as a global object, allowing it to be accessed and utilized by multiple components. How would you achieve this?

angular typescript observable

Answer 1

Answer №1

If you want to monitor changes, you can utilize a BehaviorSubject.

To achieve this, create a service like the following:

import { Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class PersonChangeDetectionService {

constructor() { }

public status: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);

  detectChange(value: any) {
    this.status.next(value);
  }

}

In your getPersonDetail() method, subscribe and call the service as follows:

this.PersonChangeDetectionService.detectChange(data);

To observe the change in a different component, use the subscription method:

this.PersonChangeDetectionService.status.subscribe((val) => {
    console.log(val)
});

Answer 2

If you want to monitor changes, you can utilize a BehaviorSubject.

To achieve this, create a service like the following:

import { Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class PersonChangeDetectionService {

constructor() { }

public status: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);

  detectChange(value: any) {
    this.status.next(value);
  }

}

In your getPersonDetail() method, subscribe and call the service as follows:

this.PersonChangeDetectionService.detectChange(data);

To observe the change in a different component, use the subscription method:

this.PersonChangeDetectionService.status.subscribe((val) => {
    console.log(val)
});

Answer 3

Answer №2

If you're looking to achieve your goal, there are a variety of methods you can explore. One straightforward approach is to store the data in a variable and then check if it's already cached for the specified ID. If it is, simply retrieve it from the cache instead of making redundant calls. Another option is to utilize an interceptor to handle caching and avoid cluttering your service requests. For detailed examples, take a look at this resource: Link

Answer 4

If you're looking to achieve your goal, there are a variety of methods you can explore. One straightforward approach is to store the data in a variable and then check if it's already cached for the specified ID. If it is, simply retrieve it from the cache instead of making redundant calls. Another option is to utilize an interceptor to handle caching and avoid cluttering your service requests. For detailed examples, take a look at this resource: Link

send information from a service's observable method to an unrelated component

Answer №1

Answer №2

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