Event Bus
An Event Bus is a software architecture pattern that facilitates communication between decoupled components in an application by using a publish-subscribe model. It acts as a central hub where components can publish events (messages) and subscribe to receive events they are interested in, without direct dependencies. This pattern is commonly used in event-driven architectures to enable loose coupling, scalability, and asynchronous processing.
Developers should learn and use an Event Bus when building applications that require decoupled communication, such as microservices, frontend frameworks, or complex systems with multiple interacting modules. It is particularly useful for scenarios like real-time updates, logging, error handling, or coordinating state changes across components, as it simplifies event management and reduces direct component dependencies.