Description: Event Sourcing is a software architectural pattern that stores the state of a system as a sequence of events. Instead of saving the current state of an object, Event Sourcing records every change that occurs in the system as an immutable event. This means that each action that modifies the state is saved as a separate event, allowing the current state of the system to be reconstructed at any time by replaying the sequence of events. This approach not only provides a complete history of changes but also facilitates auditing and data analysis, as each event can be examined individually. Additionally, Event Sourcing integrates well with other architectural patterns, such as CQRS (Command Query Responsibility Segregation), where commands that modify the state and queries that read the state are handled separately. This pattern is particularly useful in systems where consistency and traceability are critical, such as in various applications including financial systems and inventory management. By allowing the reconstruction of state from events, it also facilitates the implementation of features like undo/redo, as specific events can be reverted or replayed. In summary, Event Sourcing transforms the way states are managed in applications, offering a richer and more detailed view of the system’s evolution over time.
