Cultivating Developer-Centric DSLs

on YouTube ↗32m

" summary

Weedmaps ships a production Redis-backed limiter and a small DSL that exposes a memoized rate limiter and a clear class-level config (bucket, global and local rates). Code uses a blocking within_limit wrapper and an optional method_missing trick to support a rate_limited_ prefix, plus an “unlimited if no bucket or zero rate” fast path. Monitoring shows 429s drive design choices, global/local ordering gets flipped during rollout, and a gist with the implementation and knobs for retries and delays exists.

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" chapters (14)

1. 0:00Introduction
2. 2:27What is a DSL
3. 4:33Rate limiters with demo
4. 7:23Building DSL on rate limiter
5. 9:50Local versus global rate limits
6. 11:36Developer-centric DSL design
7. 14:44Class-level rate limiter config
8. 16:53Abstracting with within_rate_limit
9. 17:15Metaprogramming rate-limited prefix
10. 20:45Handling unlimited limits
11. 22:53Lessons learned
12. 27:06User-friendly error tracking
13. 27:47Extending rate limiter DSL
14. 30:37Q&A

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