Sending data

The previous microservice handler was very contrived. It is more likely that microservice handlers will be implemented to perform some processing on data and return some value. In a normal HTTP handler, we would use @Req or @Body to extract the data from the HTTP request’s body. Since microservice handlers have no HTTP context, they take input data as a method parameter.

@Controller()
export class UserController {
    @Client({transport: Transport.TCP, options: { port: 5667 }})
    client: ClientProxy

    @Post('users')
    public async create(@Req() req, @Res() res) {
        this.client.send({cmd: 'users.index'}, {}).subscribe({
            next: users => {
                res.status(HttpStatus.OK).json(users);
            },
            error: error => {
                res.status(HttpStatus.INTERNAL_SERVER_ERROR).json(error);
            }
        });
    }

    @MessagePattern({cmd: 'users.create'})
    public async rpcCreate...