Question: How can I use two GRPC service instances?

[MichaelGiger]

@NgModule({
  providers: [
    { provide: GRPC_TEST_SERVICE_CLIENT_SETTINGS, useValue: { host: 'http://localhost:**8080**' } as GrpcWebClientSettings, **multi: true** },
    { provide: GRPC_TEST_SERVICE_CLIENT_SETTINGS, useValue: { host: 'http://localhost:**9000**' } as GrpcWebClientSettings, **multi: true** },
  ],
})
export class AppModule {}

How do I need to inject the TestServiceClient(s) in my class/service?

  constructor(@Inject(GRPC_TEST_SERVICE_CLIENT_SETTINGS) private testServiceClients: TestServiceClient[]) {
  }

I need the service instances, not the settings!

[smnbbrv]

May I ask you why would you do that? I'd be happy to help, but first it is unclear why you want to use the same client for different ports?

[MichaelGiger]

The primary focus is on horizontal scaling and decoupling of services. Behind the ports, there are four identical Incident Services, which differ in their configurations – specifically regarding their respective data sources. Due to the significantly varying response times of each service, it is crucial that data can be independently collected and processed by each service.

[smnbbrv]

I would simply proceed with creating the services manually. The generated constructor signature for the service client is normally as follows

  constructor(
    settings: any,
    private handler: GrpcHandler
  ) {
    // ...
}

So, you can directly create one in your regular service / component. E.g.

class MyService {
  constructor(@Inject(GRPC_CLIENT_FACTORY) clientFactory: GrpcClientFactory<any>) {
    const services = [
       new TestServiceClient(settings1, clientFactory),
       new TestServiceClient(settings2, clientFactory),
    ];
  }
}

[ConnorLenahan]

Am I missing something? How are you able to get access to the GrpcHandler in a component? Do I need to inject the GRPC_INTERCEPTOR somehow?

[smnbbrv]

@ConnorLenahan please see example above. You inject clientFactory which in fact is a GrpcHandler.