A BlueSky-like Async Study

A minimal async message board / social feed engine written in Rust.
This project explores high-concurrency design using DashMap, per-user rotating buffers, and non-blocking async logic.

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Features

✅ Async-safe follow, unfollow, publish, and newsfeed operations
✅ Per-user recent post buffers (rotating, capped size)
✅ Efficient merge-K logic for news feeds
✅ Scales to thousands of users / posts with low contention
✅ Clean separation of logic + interface (ready for HTTP API)

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Future Goals

✨ Add SQLite persistence:

• Dump older post history (beyond in-memory buffer) to DB
• Load from DB to replenish buffer if needed

✨ Extend tests for large-scale simulation

✨ Add API server with Axum or Actix

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Quick Start

cargo run

Run tests:

cargo test

Design Notes

• Uses DashMap for fast concurrent reads/writes per user
• Rotating buffer (e.g. VecDeque) keeps memory bounded
• No single lock bottleneck; follows/posts/newsfeed all per-user granular
• Easy to extend with storage layers or API interface

Example Feed Output

User 1's feed has 10 posts
User 2's feed has 10 posts

License MIT