Identity in a World of Values
summary
Prototype implements durable persistence by printing s-exprs of impure functions to a file and replaying them to rebuild state, using Clojure refs + STM for atomicity, agents to emit commit-time log entries, a def-tx macro to wrap transactions, and persistent IDs plus clojure.spec for schema checks. Prototype works for small-to-moderate datasets; common‑lisp ancestor ran in production for years. Limits: function var resolution complicates replay, startup time grows with log without snapshotting, and no durability baked into Clojure STM.
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chapters (19)
- 0:00Introduction
- 5:40Entry
- 7:04Read eval
- 7:34Database
- 8:40Data Model
- 9:37Closure
- 12:50Rests
- 14:30Identities
- 17:00DevTX
- 17:35Make Account
- 18:05Deposit Withdraw
- 18:32Nested Session
- 19:05Log
- 19:27Test
- 19:42Transaction Log
- 20:03Restoring
- 20:47Where is this going
- 21:13Cons
- 22:23Questions
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