Event Sourcing Pattern in Microservices (With Real-World Example)

Learn how the Event Sourcing pattern works in microservices. Understand how to store state changes as events, ensure data consistency, and use Kafka or EventStore for implementation.

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🚀 Introduction: What is Event Sourcing in Microservices?

In traditional database systems, when an entity is updated, the old data is overwritten. However, in distributed microservices, this approach leads to:
✔ Data inconsistency across multiple services
✔ Lack of historical data tracking
✔ Challenges in debugging and auditing

✅ Solution: The Event Sourcing Pattern

Instead of storing only the latest state, Event Sourcing stores all changes as a sequence of immutable events.

✔ Each event represents a state change (e.g., OrderCreated, OrderUpdated, OrderCancelled).
✔ The current state is derived by replaying all past events.
✔ This allows full…