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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import { nxngstarter } from '@app/proto';
import { Controller, Get, Inject, OnModuleInit, Param } from '@nestjs/common';
import { type ClientGrpc, GrpcMethod, GrpcStreamMethod } from '@nestjs/microservices';
import { from, Observable, of, ReplaySubject, Subject } from 'rxjs';
import { toArray } from 'rxjs/operators';
import { NXNGSTARTER_PACKAGE } from '../grpc-client.options';
export interface IEntityService {
findOne(data: nxngstarter.IEntityById): Observable<nxngstarter.IEntity>;
findMany(upstream: Observable<nxngstarter.IEntityById>): Observable<nxngstarter.IEntity>;
}
@Controller('grpc')
export class AppGrpcController implements OnModuleInit {
private readonly items: nxngstarter.IEntity[] = [
{
id: 'id1',
integer: 1,
boolean: true,
float: 0.5,
any: null,
subEntities: [],
},
{
id: 'id2',
integer: 2,
boolean: false,
float: 1.5,
any: null,
subEntities: [{ id: 'subid1' }],
},
];
private sampleService?: IEntityService;
constructor(@Inject(NXNGSTARTER_PACKAGE) private readonly client: ClientGrpc) {}
public onModuleInit() {
this.sampleService = this.client.getService<IEntityService>('EntityService');
}
@Get()
public getMany(): Observable<nxngstarter.IEntity[]> {
const idsSubject = new ReplaySubject<nxngstarter.IEntityById>();
idsSubject.next({ id: 'id1' });
idsSubject.next({ id: 'id2' });
idsSubject.complete();
return typeof this.sampleService !== 'undefined' ? this.sampleService.findMany(idsSubject.asObservable()).pipe(toArray()) : of([]);
}
@Get(':id')
public getById(@Param('id') id: string): Observable<nxngstarter.IEntity> {
return typeof this.sampleService !== 'undefined'
? from(this.sampleService.findOne({ id }))
: of(
nxngstarter.Entity.toObject(new nxngstarter.Entity(), {
defaults: true,
}),
);
}
@GrpcMethod('EntityService', 'FindOne')
public findOne(data: nxngstarter.IEntityById, metadata: Record<string, unknown>): nxngstarter.IEntity | undefined {
return this.items.find(({ id }) => id === data.id);
}
@GrpcStreamMethod('EntityService', 'FindMany')
public findMany(data$: Observable<nxngstarter.IEntityById>, metadata: Record<string, unknown>): Observable<nxngstarter.IEntity> {
const entitySubject = new Subject<nxngstarter.IEntity>();
const onNext = (entityById: nxngstarter.IEntityById) => {
const item = this.items.find(({ id }) => id === entityById.id);
if (typeof item !== 'undefined') {
entitySubject.next(item);
}
};
const onComplete = () => {
entitySubject.complete();
};
void data$.subscribe({
next(value) {
return onNext(value);
},
complete() {
return onComplete();
},
});
return entitySubject.asObservable();
}
}
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