Model state as the events that produced it#
AccountOpened +$100
Purchase −$20
Current balance $80Event sourcing treats the event sequence as the source of truth and rebuilds current projections by replay. Snapshots can shorten recovery. Benefits include audit history and temporal reconstruction; costs include event evolution, replay, projection consistency, and substantial operating complexity.
Related practice problems
Use the manifest-backed prompts below to apply this lesson in a complete design.
- Apache Kafka introductionApache Kafka Documentation