walex
pg-boss
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walex | pg-boss | |
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17 | 12 | |
251 | 1,625 | |
- | - | |
9.1 | 5.5 | |
19 days ago | 24 days ago | |
Elixir | JavaScript | |
MIT License | MIT License |
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walex
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The Guide to PostgreSQL Data Change Tracking
The WAL CDC approach: https://github.com/cpursley/walex?tab=readme-ov-file#publica...
CREATE PUBLICATION news_item FOR TABLE news WHERE (topic IS "AAPL");
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Elixir Nitpicks
What do you mean testing with processes?
I won't suggest these are the best written tests, but I test various processes, supervisors, etc like this:
https://github.com/cpursley/walex/blob/master/test/walex/sup...
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PostgreSQL Is Enough
You don’t send the entire WAL, just what you subscribe to - and you can even filter via SQL: https://github.com/cpursley/walex?tab=readme-ov-file#publica...
- A Technical Dive into PostgreSQL's replication mechanisms
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Fly Postgres, Managed by Supabase
What we do is much if the business logic in Postgres. But then there’s all the other stuff like external integrations, etc.
We handled that by having an Even system built on the Postgres WAL that we use like a callback system.
I put together a little library in Elixir (that originally started out as forked Supabase realtime) for this:
https://github.com/cpursley/walex
Recently added the ability to configure WalEx to forward events to webhooks or EventRelay (so you don’t need to know Elixir).
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All the ways to capture changes in Postgres
If you're using Elixir, check out https://github.com/cpursley/walex
I've actually been thinking about turning this idea into a product where you can just point it at your postgres database and select the tables you want to listen to (with filters, like you describe). And have that forwarded to a webhook (with possibility of other protocols).
I'd love to hear folks thoughts on that (and if it would be something people would pay for).
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Show HN: ElectricSQL, Postgres to SQLite active-active sync for local-first apps
Neat, this is the pattern I've been thinking about for a while now. Also glad to see this is Elixir based.
I've been using https://github.com/cpursley/walex (basically a fork of cainophile via a fork for subabase) to listen to Postgres changes in Elixir.
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How to Listen to Database Changes Using Postgres Triggers in Elixir
https://github.com/cpursley/walex
Which is based on WAL logs and doesnt have the same limitations.
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PostgreSQL Logical Replication Gotchas
Great writeup, just added this to the WalEx readme:
https://github.com/cpursley/walex
(WalEx is an Elixir lib for listening to the WAL and perform callback-like actions with the data)
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We used Elixir's Observer to hunt down bottlenecks
Very cool.
I'm using Elixir to listen to change events via https://github.com/cpursley/walex (which I basically ripped off from Supabase).
pg-boss
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Choose Postgres Queue Technology
For running queues on Postgres with Node.js backend(s), I highly recommend https://github.com/timgit/pg-boss. I'm sure it has it scale limits. But if you're one of the 90% of the apps that never needs any kind of scale that a modern server can't easily handle then it's fantastic. You get transactional queueing of jobs, and it automatically handles syncing across multiple job processing servers using Postgres locks.
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Build Your Own Personal Twitter Agent 🧠🐦⛓ with LangChain
Jobs use pg-boss, a postgres extension, to queue and run tasks under the hood.
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SQL Maxis: Why We Ditched RabbitMQ and Replaced It with a Postgres Queue
If you don't want to roll your own, look into https://github.com/timgit/pg-boss
- How/do you handle queue type workflows?
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Which tool/library well adopted to use Postgres as a message broker?
I saw this https://github.com/timgit/pg-boss but it's more for jobs than for message with multiple consumers (having their own progress offset).
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How to schedule tasks in a Node.js app 🕙
The best I've used till now. Has all kind of features and really great when you have a postgres dB in your stack. https://github.com/timgit/pg-boss
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Cluster friendly task scheduler for NodeJS
Check out these; - https://github.com/mitranim/posterus - https://github.com/timgit/pg-boss - https://github.com/FirebaseExtended/firebase-queue - https://www.npmjs.com/package/rabbit-queue
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You don't need distributed systems.
You can use the simplest option than implement a new service. Keep in mind that every running system can be a job scheduler, you can just use nodejs worker threads, Redis, or even your DB as a job scheduler, check PGBoss for example.
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Launch HN: Convoy (YC W22) – Open-source cloud-native webhooks service
Both! For context, we're currently using https://github.com/timgit/pg-boss as a task queue on top of postgres and it works great. No need to complicate things with Redis. I believe it's quite straightforward to implement a task queue on top of postgres using the SKIP LOCKED functionality.
- Devious SQL: Message Queuing Using Native PostgreSQL
What are some alternatives?
PolarDB-for-PostgreSQL - A cloud-native database based on PostgreSQL developed by Alibaba Cloud.
worker - High performance Node.js/PostgreSQL job queue (also suitable for getting jobs generated by PostgreSQL triggers/functions out into a different work queue)
neon - Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, branching, and bottomless storage.
celery - Distributed Task Queue (development branch)
realtime - Broadcast, Presence, and Postgres Changes via WebSockets
django-postgres-queue - A task queue for django
libcluster - Automatic cluster formation/healing for Elixir applications
RabbitMQ - Open source RabbitMQ: core server and tier 1 (built-in) plugins
Redis - Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.
helm-charts - neondatabase helm charts
kue - Kue is a priority job queue backed by redis, built for node.js.