Chain of Responsibility

To decouple request senders from specific handlers, route requests through a chain of responsibility where each processor decides to handle the request or pass it to a successor. This avoids hardcoding direct calls and enables dynamic insertion or removal of handlers.

The best way to implement a flexible authentication and validation pipeline is using a chain of responsibility. You can link multiple concrete handlers sequentially, allowing each to validate or authenticate the request before passing it along the chain.

A handler chain manages unhandled requests by providing clear termination or fallback behavior. The chain of responsibility can be configured with a default handler at the end to ensure requests are not lost if no concrete handler processes them.

Yes, you can dynamically add, remove, or reorder handlers in a request chain without modifying the sender. The chain of responsibility pattern decouples the request initiator from the processing logic, ensuring high extensibility for new ConcreteHandler implementations.

You should use a chain of responsibility pattern instead of direct function calls when you need to process requests through multiple potential handlers like logging, authorization, or validation workflows. It prevents tight coupling and allows flexible routing.

Yes, the chain of responsibility pattern effectively supports middleware for logging and authorization. It routes requests through a linked list of processors, allowing distinct handlers to manage logging and authorization steps sequentially before final execution.