Eventsourcing and CQRS in Elixir
summary
Builds a small event‑sourced bank using the commanded library in Elixir: defines commands (deposit, withdraw, send), domain events (account opened, money deposited/withdrawn, journal entry), and an aggregate with execute/apply callbacks that emit events and update balance. Uses projectors with Ecto.Multi to populate read models and a process manager that turns money‑sent events into receive commands, handles missing destination accounts by emitting failure events and compensating journal entries, and shows upcasters for event versioning plus GDPR guidance to avoid storing personal data in events.
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chapters (12)
- 0:00Start
- 3:41Requirements
- 5:21Common Types
- 5:58Commands
- 6:29Events
- 7:58Router
- 9:28Accounts Aggregate
- 11:33Accounts Context
- 13:16Account Entry Schema
- 13:47Account Entry Projector
- 17:56Send To Account
- 19:59Receiving Money
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