CODEWITHSUNDEEP
javascriptnode.jsswaggernestjsnestjs-swagger
Ujjual
Ujjual

Reputation: 998

How to call nestjs microservice from any frontend app?

I have a made a NestJS microservice package and separate NestJS client application for contacting the microservice. Below given is the code used in the client application. In microservice the method used is @messagePattern and it is functional. My question is how a front-end app can contact directly to the microservice without going through the client also how to setup swagger in microservice or test it directly from a postman ?

import { BadRequestException, Injectable, UnauthorizedException } from '@nestjs/common';
import { ClientProxy, ClientProxyFactory, Transport } from '@nestjs/microservices';
import { errorResponse, goodResponse } from 'src/helpers/response.helper';
import { AddContractDTO } from './contract.dto';

@Injectable()

export class ContractService {
    private client: ClientProxy; 

    constructor() {
        this.client = ClientProxyFactory.create({
          transport: Transport.TCP,
          options: {
            host: '127.0.0.1',
            port: 3011,
          },
        });
      }

    public async addContract(data: AddContractDTO) {
            const res = await this.client.send<any,any>('contract/addContract', data).toPromise();
            console.log(res);
            if(!res.success){
              throw new BadRequestException(res)
            }
            return goodResponse(res.data.data,'Contract created');

    }
}

Upvotes: 0

Views: 2573

Answers (1)

Schutt
Schutt

Reputation: 1134

You cannot call the service directly. You need to create a controller (to bind to an endpoint) which then can call the service.

Examples can be found in the NestJS Documentation (https://docs.nestjs.com/microservices/basics).

Upvotes: 5

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