Event-Driven & Reactive Systems

Event-driven and reactive systems respond to things happening in real time. Instead of waiting for commands, parts of the app react automatically as new events occur, making them ideal for live updates, notifications, or rapid changes.

Think of a train station. When a train arrives, passengers get on and off, and information boards update instantly. Everything responds to real-world events, so the system is always up to date.

• Events: Changes or actions that trigger responses
• Reactivity: Automatic updates and responses
• Loose coupling: Components don't need to know about each other directly