Description: Event subscription is a pattern that allows a component to listen for specific events. This pattern is fundamental in event-driven programming, where software components can react to changes or actions in other components. Event subscription is based on a publish-subscribe architecture, where a ‘publisher’ emits events and one or more ‘subscribers’ register to receive notifications about those events. This approach promotes a decoupled design, meaning that components do not need to know the internal implementation of other components to interact with them. The main features of this pattern include the ability to handle multiple subscribers, the flexibility to add or remove subscribers at runtime, and the capability to manage events asynchronously. Event subscription is especially relevant in modern applications, where user interaction and communication between components are essential for a smooth and dynamic experience. This pattern is widely used in various domains, including user interface development, messaging systems, and microservices architectures, where communication between different parts of the system is crucial for its efficient operation.
