.NET: Practical Event Sourcing with Marten
summary
Shows a concrete .NET implementation that uses Marten on Postgres to store immutable events as a JSONB event table (id, type, stream id, version, timestamp, data) and to publish snapshots as snapshot documents for fast reads. Builds a cinema reservation example with aggregates that enqueue uncommitted events, append them atomically to the store, and project multiple read models via CQRS and projections. Demonstrates strong consistency, time travel by replaying events, and simple rebuilds of projections from the log.
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chapters (13)
- 0:00Introduction and speaker intro
- 1:16What is event sourcing
- 7:05Event storming and business events
- 9:12Technical event structure
- 15:54Marten and its origins
- 17:23Entities vs aggregates in event sourcing
- 18:29Code walkthrough: Reservation aggregate
- 28:30Storing and retrieving events
- 31:24Document session and CQRS
- 32:45Performance and snapshots
- 35:57Projections and their power
- 41:00Time travel and debugging
- 42:26Summary and next steps
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