Chain of Responsibility
Chain of Responsibility is a behavioral design pattern that allows multiple objects to handle a request without the sender needing to know which object will process it. It passes the request along a chain of handler objects until one of them handles it, promoting loose coupling and flexibility in request processing. This pattern is commonly used in software development to decouple senders and receivers of requests.
Developers should learn and use Chain of Responsibility when they need to process requests through multiple handlers in a flexible, dynamic way, such as in event handling systems, logging frameworks, or middleware pipelines. It is particularly useful in scenarios where the handler chain can be configured at runtime, like in web server request filters or validation workflows, to avoid hard-coding dependencies between senders and receivers.