r2dbc-postgresql
walex
| r2dbc-postgresql | walex | |
|---|---|---|
| 4 | 19 | |
| 1,061 | 329 | |
| 0.5% | 0.9% | |
| 7.1 | 6.4 | |
| 11 months ago | about 1 month ago | |
| Java | Elixir | |
| Apache License 2.0 | MIT License |
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r2dbc-postgresql
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Reactive Backend Applications with Spring Boot, Kotlin and Coroutines (Part 1)
Now that we have an application, let's turn it into a reactive application. For this, we will replace Spring Web dependency with Spring WebFlux, Spring Data JPA with Spring Data R2DBC. We will also add R2DBC dependency for our H2 database. R2DBC works with a reactive driver so it will integrate nicely with the rest of our application to allow us database access in a non-blocking way.
- Reactive db drivers (r2dbc)
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I need to create an API, but I don't know what framework to use. What would you choose, of you were me, and scalability is a quite important factor?
However, if you really expect a lot of users (especially concurrent ones) to use your API, you should delve into the world of reactive programming. Use tools like RxJS (JS/TS) or Project Reactor (Java) in such a case, preferably in combination with a broker like Kafka or RabbitMQ. R2DBC is also great for a data store. Then of course if you want to go one step further, there also exists the less popular but very interesting Actor model which Akka easily has ported into Java.
- Postgres is a great pub/sub and job server
walex
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PostgreSQL Is the Database Management System of the Year 2024
Turning on replication in neon.tech is literally just a switch. And it plays well with a CDC library of mine:
https://github.com/cpursley/walex
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How to Collapse Your Stack Using PostgreSQL for Everything
Check out WalEx for this: https://github.com/cpursley/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.
What are some alternatives?
worker - High performance Node.js/PostgreSQL job queue (also suitable for getting jobs generated by PostgreSQL triggers/functions out into a different work queue)
sql-task-queue
supavisor - A cloud-native, multi-tenant Postgres connection pooler.
BlockHound - Java agent to detect blocking calls from non-blocking threads.
gremlex - Elixir Client for Gremlin (Apache TinkerPop™) [GET https://api.github.com/repos/Revmaker/gremlex: 404 - Not Found // See: https://docs.github.com/rest/repos/repos#get-a-repository]