The gist
Moleculer
The gist | Moleculer | |
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26 | 16 | |
5,212 | 6,016 | |
3.1% | 0.7% | |
9.7 | 7.5 | |
3 days ago | 7 days ago | |
TypeScript | JavaScript | |
MIT License | MIT License |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
The gist
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Object Narrowing in Typescript with Graphile Worker
Graphile worker has been great for me because it's a library that works with Postgres that allows me to queue jobs and execute them on the server without adding too many additional layers of complexity for being able to accomplish async tasks. (I'm aware of how popular bull is, but I don't want to add another data-store only for async tasks)
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Job Schedulers for Node: Bull or Agenda?
Bull is currently in maintenance mode, we are only fixing bugs. For new features check BullMQ, a modern rewritten implementation in Typescript. You are still very welcome to use Bull if it suits your needs, which is a safe, battle-tested library.
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Are there any generally accepted standards for inter-microservice communication? Or does everyone just go it their own?
I use bullmq with node
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Next.js background jobs
You might consider using a queue for processing the request. I've found bullMQ, which works with Redis, to be a nice developer experience.
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What is a good background scheduler?
BullMQ is a pretty solid choice: https://github.com/taskforcesh/bullmq It's the successor of Bull: https://github.com/OptimalBits/bull
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How to schedule tasks in a Node.js app 🕙
BullMQ
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First time building microservice-based application
For Node.JS you can use something like BullMQ (https://github.com/taskforcesh/bullmq) and then dispatch jobs to the message queue with your worker handling the jobs. You can read about an example for Bull MQ here (https://deadsimplechat.com/blog/best-nodejs-schedulers/#2-bull)
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Is my health check endpoint good enough?
bullmq seems like an open issue
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Help implementing Heroku Data For Redis (+bull & throng) / `ioredis`
In order to try and mitigate the OOMs. I read the Background Jobs in Node.JS with Redis blog post and implemented Heroku Data For Redis with ioredis, BullMQ and Throng,
- BullMQ – fastest, most reliable, Redis-based distributed queue for Node
Moleculer
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Make microservices look like monoliths
My goto for this kind of task is moleculer: https://moleculer.services/
Fast, battle tested, vue2-like approach, great documentation, good community. The automatic indipendent-scalability as an option is usually the main selling point of these solutions, but honestly I think the real pro is the "composition" approach, which is essential if you want to keep a clean and well-organized codebase. On this regard, I found moleculer pretty great even for large teams.
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How to Import/Reference a Microservice from another one
If you’re using k8s, check out https://moleculer.services and this would likely solve what you’re looking for.
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Node JS Microservice Frameworks for Developing Scalable Web Apps.
Molecular – Progressive Microservices Framework for Node.js
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First time building microservice-based application
While you’re delving into microservices, check out Moleculer https://moleculer.services
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if Nodejs does not meant for CPU intensive tasks so I think it's better to avoid it from the beginning
I almost can’t believe I haven’t seen it mentioned here before, but adding Moleculer into your node project (if it’s clustered/k8s’d) will literally solve many single threaded problems, not to mention tons of other scalability issues. https://moleculer.services/
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How to deal with singletons in a distributed system?
You could use a framework for this. Have a look at moleculer
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Where can I learn to implement microservices?
I haven't used this, but it seems neat: https://moleculer.services/
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Microservices using express js
Look into Moleculer.
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Been playing with moleculerjs recently, and just finished my first package: a service that allows you to use any node API framework as a moleculer gateway.
Moleculer already provides an in-house http gateway, but what if you want to use an existing API, and how to maintain decoupled code when creating your gateway? This package solves both. You can create your API, passing in any services you require as dependencies. You can then bind your API to moleculer using the moleculer-universal-gateway.
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Don’t start with microservices – monoliths are your friend
But there's more to the topic of microservices. Seems like all the conversation focuses on deployment pain. You can build a service with something like Akka or Moleculer where the modules act independently and have some message passing and resilience from each other, but they can still all live in one codebase, one process, and deployed as one unit. It works fine and isn't painful at all. And maybe down the line you decide to split the thing up into multiple processes and multiple deployment units, and that's an easy refactor because the modules are already somewhat separated.
What are some alternatives?
bull - Premium Queue package for handling distributed jobs and messages in NodeJS.
Nest - A progressive Node.js framework for building efficient, scalable, and enterprise-grade server-side applications with TypeScript/JavaScript 🚀
Bee-Queue - A simple, fast, robust job/task queue for Node.js, backed by Redis.
Express - Fast, unopinionated, minimalist web framework for node.
better-queue - Better Queue for NodeJS
AWS Lambda Router for NodeJS - AWS Lambda router for NodeJS
RedisSMQ - A simple high-performance Redis message queue for Node.js.
seneca - A microservices toolkit for Node.js.
kue - Kue is a priority job queue backed by redis, built for node.js.
AdonisJs Framework - AdonisJS is a TypeScript-first web framework for building web apps and API servers. It comes with support for testing, modern tooling, an ecosystem of official packages, and more.
bree - Bree is a Node.js and JavaScript job task scheduler with worker threads, cron, Date, and human syntax. Built for @ladjs, @forwardemail, @spamscanner, @cabinjs.
fastify - Fast and low overhead web framework, for Node.js