content-hash-cache-pattern

Use SHA-256 content hashing to cache file processing results, which creates cache keys based on file content rather than file paths. This ensures your cache remains valid and survives file renames or moves without invalidation.

Implement a content-hash cache using SHA-256 to store file processing results as JSON files. This prevents recomputation by checking the content hash before processing, providing O(1) lookups without needing a separate index for your large documents.

Path-based caching breaks because it relies on file location rather than content identity. Content-hash caching solves this by using SHA-256 hashes as keys, automatically invalidating when file content changes and remaining robust against file renames and moves.

Handle cache misses and corruption gracefully by implementing a file-based JSON cache storage system that separates cache logic from the processing function. This pure service layer wrapper automatically detects corruption and reprocesses files when needed.

No, content-hash caching uses file-based JSON cache storage where each entry is stored as a {hash}.json file. This approach provides O(1) lookups without requiring a database or an index, keeping the cache storage lightweight and portable.

Yes, the service layer wrapper follows the Single Responsibility Principle by separating cache logic from the processing function. This keeps your processing function pure while the caching service handles SHA-256 hashing, storage, and cache retrieval independently.