Chain of Responsibility Pattern

The Chain of Responsibility pattern lets Java code pass a request through an ordered set of handlers until one handles it, all of them contribute to it, or the chain deliberately stops. The main benefit is decoupling the sender from a specific receiver without forcing the sender to know the full routing logic.

That makes the pattern useful in middleware, validation, filtering, logging, and authorization flows where order matters but the caller should not coordinate every branch directly. The trade-off is that control flow becomes easier to hide, especially when handlers mutate shared context or silently fall through.

Read this section with one question in mind: is the request really a pipeline of responsibilities, or is a simpler dispatcher, strategy lookup, or explicit orchestration flow easier to review? The pages that follow cover implementation shape, static versus dynamic chain construction, coupling boundaries, and realistic Java use cases.

In this section

• Implementing Chain of Responsibility in Java
  Build a Java handler chain that forwards, short-circuits, or enriches requests without turning the flow into hidden control logic.
• Dynamic vs. Static Chain Construction in Java
  Compare fixed and runtime-built Java handler chains so you can choose between predictability, configurability, and operational complexity.
• Avoiding Sender-Receiver Coupling with Chain of Responsibility
  Learn how Chain of Responsibility loosens sender-receiver dependencies in Java and what coupling still remains in handler ordering and shared context.
• Chain of Responsibility Pattern Use Cases and Examples in Java
  See where Chain of Responsibility fits in Java logging, middleware, validation, and auth flows, and where a simpler dispatcher is better.