pattern-chain-of-responsibility

To route requests through sequential handlers, implement the chain of responsibility pattern using a common handler interface with setNext and handle methods, allowing each check to dynamically stop or forward requests. This replaces monolithic logic with interchangeable, reorderable handlers.

Set up a validation pipeline by linking concrete handlers like authentication, validation, and logging into a configurable chain. Each handler decides to halt processing or delegate to the next handler, ensuring checks execute sequentially before core logic.

The best way to configure dynamic handler ordering for NestJS middleware and guards is applying a chain of responsibility pipeline. This lets each verification step decide to halt or pass the request without altering client code.

Yes, you can use this chain of responsibility pattern for NestJS interceptor layers. It establishes setNext semantics to link each verification step dynamically, allowing interceptors to halt processing or delegate to the next handler.

You need a chain of responsibility pattern for request handling when sequential checks become hard to reorder, test, or extend. It treats each check as an interchangeable handler with stop-or-pass logic to keep request-processing services flexible.

Your middleware chain stops processing requests prematurely when a handler intentionally halts the chain instead of delegating to the next handler. The setNext/handle contracts allow each verification step to dynamically decide whether to stop or pass requests.