What is event sourcing in Java microservices?

What is event sourcing in Java microservices?

Event sourcing is a design pattern where state changes are stored as a sequence of events. In Java microservices, this means that instead of storing just the current state of an object, you store all the events that led to that state.

How does it differ from traditional CRUD operations?

Unlike traditional CRUD, which focuses on the current state, event sourcing captures every change as an event. This allows for better traceability and the ability to reconstruct past states.

What are the benefits of using event sourcing?

Benefits include improved auditability, the ability to replay events for debugging, and better handling of complex business logic.

Can you give an example of event sourcing in a Java application?

Sure! In a banking application, instead of just storing the current balance, you would store events like 'Deposit' and 'Withdrawal', allowing you to track the history of transactions.