domain-exception-hierarchy

You model domain exceptions by implementing a typed three-tier hierarchy: an abstract base exception carrying code, context, timestamp, and cause; categorized leaves; and an adapter translator. This structure preserves diagnostic context and propagates errors consistently across clean architecture layers.

A three-tier domain exception hierarchy consists of a base exception class defining the contract, category-level exceptions grouping related business errors, and leaf exceptions carrying specific typed context. This categorization ensures precise error diagnosis and safe cross-layer boundaries in clean architecture.

You translate infrastructure errors using a one-way adapter translation mechanism. This maps external infrastructure failures into semantic domain exceptions, maintaining consistency and observability while preventing infrastructure details from leaking into the domain layer.

Yes, the domain exception hierarchy includes layered resilience handlers for retry and fallback. These handlers intercept translated infrastructure exceptions, apply recovery policies, and ensure that business errors remain actionable and traceable across the application and infrastructure layers.

Leaf exceptions in the hierarchy serialize to API-friendly payloads by leveraging their strongly typed context and error codes. This ensures the serialized output contains structured diagnostic information needed for consistent client-side error handling and audit observability.