Technical Adapters

Logging

A standard-library logging adapter implementing LoggerPort. Provides debug, info, warning, and error methods.

HTTP Client

A urllib-based HTTP client implementing ExternalServicePort. Supports GET, POST, headers, and timeout configuration.

File System

An OS-level filesystem adapter implementing FileSystemPort. Supports read, write, delete, exists, and directory listing.

Caching

A dictionary-backed key-value cache implementing CachePort. Supports get, set, delete, and clear.

Serialization

Serializable is structural — any class with to_dict() / from_dict() methods satisfies the contract, enabling generic serialization infrastructure.

When to use

These adapters implement the corresponding outbound ports from Application. Use the in-memory versions for tests; swap to real implementations (database, HTTP, filesystem) in production.