eseményforrásarchitektúra

Eseményforrása is a Hungarian term that translates directly to "event source." In software development, it refers to a fundamental architectural pattern known as Event Sourcing. This pattern involves storing all changes to an application's state as a sequence of immutable events. Instead of storing the current state of data directly in a database, an event source system records every event that occurs. For example, if a user's profile is updated, instead of overwriting the old profile data, an "UserProfileUpdated" event would be recorded, along with the details of the change.

The current state of the application can then be reconstructed by replaying these events from the beginning. This approach offers several advantages. It provides a complete and auditable history of all state changes, which can be invaluable for debugging, auditing, and business intelligence. It also simplifies handling concurrency issues and allows for easier implementation of features like time travel or rollbacks. Furthermore, event sourcing can be a powerful foundation for building complex, distributed systems and implementing patterns like Command Query Responsibility Segregation (CQRS). While it introduces a different way of thinking about data persistence compared to traditional state-based storage, its benefits in terms of transparency, auditability, and flexibility are significant in modern application design.