🚀 Understanding Event Sourcing

Event Sourcing is a powerful design pattern used to track data changes over time by storing each state change as an event, rather than only the current state. This provides a complete history of changes, enabling easy recreation of past states for better traceability, auditing, and debugging.

Example: Order Processing in E-commerce

In e-commerce, when a customer places an order, it typically goes through multiple status changes:

Initiated -> Placed -> Shipped -> Delivered

Each status change is recorded as an event with its timestamp, allowing us to track the entire order lifecycle.

Event Sourcing Table:

Real life example:

Without Event Sourcing:

Without event sourcing, only the last status is stored, losing the full history:

Event Sourcing is essential for building reliable, auditable, and scalable systems, especially when the history of changes is as important as the current state. 💡