Publish-and-Subscribe Pattern

The Publish-and-Subscribe pattern is a way for different parts of a system to communicate efficiently. Think of a newspaper subscription: publishers create content and "publish" it to a platform. Subscribers, like readers, "subscribe" to topics they care about. When new content is published, it automatically reaches all subscribers of that topic. This setup allows senders to distribute information to many interested recipients without knowing their identities, enabling dynamic and scalable communication. It's commonly used in software systems for real-time updates, event handling, and messaging between components.