Practical Event Sourcing with Marten and .NET

on YouTube ↗01h 00m

" summary

Demoed a support-ticket domain implemented with Marten on Postgres using JSONB, showing real code that builds events, applies them to in-memory aggregates, and persists them as append-only streams. Shows Marten + Postgres JSONB for storage, optimistic concurrency with version checks and transactional projections, and both inline projections and async “daemon” projections that update read models or push to SignalR/Kafka. Claims strong consistency is achievable; examples run and return streamed JSON for fast read paths.

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" chapters (11)

1. 0:00Event sourcing introduction
2. 3:37What events and value
3. 9:35Marten and event stores
4. 18:06Defining events and logic
5. 26:28Building state from events
6. 29:22Storing events in Marten
7. 36:12Simple .NET app with Marten
8. 40:53Understanding projections
9. 47:20Read models and projections
10. 56:36Custom projections use cases
11. 57:20Summary

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