Struct ObjectCache 

pub struct ObjectCache { /* private fields */ }

A content-addressed store of fact sets on disk.

Implementations

impl ObjectCache

pub fn open(root: impl Into<PathBuf>) -> Result<Self, CacheError>

Open (creating if absent) a cache rooted at root.

Errors

Returns CacheError::Io if the root directory cannot be created.

pub fn root(&self) -> &Path

The directory this cache stores objects under.

pub fn contains(&self, blob_id: &str) -> bool

Whether a fact set is cached for blob_id.

pub fn get(&self, blob_id: &str) -> Result<Option<FactSet>, CacheError>

Load the cached fact set for blob_id, if present.

Errors

Returns CacheError::Io on read failure or CacheError::Json if the entry cannot be decoded.

pub fn put(&self, blob_id: &str, facts: &FactSet) -> Result<(), CacheError>

Store facts under blob_id, replacing any existing entry. The write is atomic (write-to-temp then rename) so a crash never leaves a torn entry.

Errors

Returns CacheError::Io on write failure or CacheError::Json if facts cannot be encoded.