Event-Driven Architecture (EDA) is a design pattern that focuses on events as the central component of the system. Events can be any change in the state of the application. These events can be anything from a user clicking a button on a website, to a sensor detecting a change in temperature. In EDA, events are produced, detected, consumed, and reacted to by different parts of the application, enabling for a more decoupled and sometimes scalable architecture.
One practical example of EDA is in a real-time dashboard that displays stock prices. The system is designed to react to events, such as changes in stock prices, and update the dashboard in real-time. This enables a responsive system that can handle a large number of users without being bogged down by constant polling for updates.