Chain of Responsibility is a behavioral pattern that lets you pass requests along a chain of handlers. Each handler decides either to process the request or to pass it to the next handler in the chain. Think of a support ticket system: a Level-1 agent handles simple issues; if they can't, they escalate to Level-2; then to a manager — the ticket travels the chain until someone handles it.
ℹ️Core idea: decouple the sender of a request from its receiver by giving multiple objects a chance to handle the request. The request travels along a chain until a handler processes it — or it reaches the end unhandled.
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