Event-driven architecture (EDA) is a design pattern where system components communicate by generating, detecting, and responding to events. Events represent significant occurrences, such as user actions or changes in the system state. In EDA, components are decoupled, allowing them to operate independently.

Event-driven architecture (EDA) is a software design pattern that enables the construction of scalable and loosely coupled systems. Events representing occurrences or changes in the system drive the flow. They are generated by various sources, published to an event bus or message broker, and consumed by interested components asynchronously.

Event Sourcing is a design pattern used in system architecture where the state of an application is determined by a sequence of events. Instead of directly modifying the state of an object or database, changes to the application’s state are captured as a series of immutable events.

There are three general styles of event processing: simple, stream, and complex. The three styles are often used together in a mature event-driven architecture.