graphql-eventbus VS nestjs

Docs: https://graphql-eventbus.vercel.app/

Hey guys, I've been working on a GraphQL library for typescript that enables building event driven architecture using GraphQL schema. It can be used to publish and consume events in a type safe way using any message broker (Kafka, .RabbitMQ, PubSub etc). I built this library to scratch my own itch when I was trying to building a type safe event driven communication between microservices: JSON schema and protobuf didn't feel elegant and were too verbose so I thought why not GraphQL. You can read more in my blog post here: https://graphql-eventbus.vercel.app/blog

Youtube Intro Video: https://www.youtube.com/watch?v=XLbShOmkKk0

Github: https://github.com/skk2142/graphql-eventbus

Docs: https://graphql-eventbus.vercel.app/

I'd love to get your feedback!

When you're going to use RabbitMQ I would advise to use the RabbitMQ library at https://github.com/golevelup/nestjs. It's way more flexible than the default RabbitMQ microservice.

For this, I'm going to be using a package called @golevelup/nestjs-modules to help with the creation of the dynamic module. Instead of having to set up the entire forRoot and forRootAsync methods, we can extend a mixin and let the package take care of the setup for us. everything in this article will work without the package, I just like using it for the sake of simplicity. So, lets dive into setting up our AuthModule to be a dynamic module. First we need to create our injection token for the options

import { Injectable, NestMiddleware } from '@nestjs/common' import { json } from 'body-parser' /** * Copied this middleware to parse the raw response into a param to use later * from https://github.com/golevelup/nestjs/blob/master/packages/webhooks/src/webhooks.middleware.ts */ @Injectable() export class RawBodyMiddleware implements NestMiddleware { public constructor() {} public use(req: Request, res: Response, next: () => any): any { json({ verify: (req: any, res, buffer) => { if (Buffer.isBuffer(buffer)) { const rawBody = Buffer.from(buffer) req['parsedRawBody'] = rawBody } return true }, })(req, res as any, next) } }

The easiest thing to do is just mock all of a services methods with jest mock functions. I like to do that with this library: https://github.com/golevelup/nestjs/tree/master/packages/testing