content-hash-cache-pattern

You can cache file processing results by implementing a separate service layer that uses SHA-256 content hashes as cache keys. This ensures that costly operations like PDF parsing and image analysis are not repeated unnecessarily.

Content-hash keying generates cache keys using SHA-256 hashes, making them independent of file paths. The cache automatically invalidates when file content changes, ensuring accurate results without being affected by file relocation.

You can automatically invalidate cached file data by using SHA-256 content hashing. Because the hash changes when the file content is modified, the cache key changes, ensuring stale data is never retrieved and files are reprocessed only when needed.

Yes, this caching approach is specifically designed for repetitive processing of static files such as PDFs and images. It separates the caching service layer from the processing functions to maintain pure processing logic while optimizing performance.

The best way to structure a caching service layer for file processing is to separate it from the main processing functions. This maintains the purity of functions handling PDF parsing or text extraction while the service layer manages the SHA-256 cache keys.