Publish-Subscribe Pattern
The Publish-Subscribe Pattern (Pub/Sub) is a messaging design pattern where senders (publishers) broadcast messages to multiple receivers (subscribers) without them knowing each other's identities. It decouples components by using an intermediary message broker or event bus that manages subscriptions and message routing. This pattern is widely used in distributed systems, event-driven architectures, and real-time applications to enable scalable and flexible communication.
Developers should learn and use the Publish-Subscribe Pattern when building systems that require loose coupling, scalability, and asynchronous communication, such as microservices architectures, real-time notifications, or IoT data streaming. It's particularly useful in scenarios where multiple components need to react to events without direct dependencies, like in chat applications, stock tickers, or logging systems, as it enhances modularity and reduces system complexity.