Struct DefaultFilesMetadataCache 

pub struct DefaultFilesMetadataCache { /* private fields */ }

Default implementation of FileMetadataCache

Collected file embedded metadata cache.

The metadata for each file is validated by comparing the cached ObjectMeta (size and last_modified) against the current file state using cached.is_valid_for(&current_meta).

Internal details

The memory_limit controls the maximum size of the cache, which uses a Least Recently Used eviction algorithm. When adding a new entry, if the total size of the cached entries exceeds memory_limit, the least recently used entries are evicted until the total size is lower than memory_limit.

Implementations

impl DefaultFilesMetadataCache

pub fn new(memory_limit: usize) -> Self

Create a new instance of DefaultFilesMetadataCache.

Arguments

memory_limit: the maximum size of the cache, in bytes

pub fn memory_used(&self) -> usize

Returns the size of the cached memory, in bytes.

Trait Implementations

impl CacheAccessor<Path, CachedFileMetadataEntry> for DefaultFilesMetadataCache

fn get(&self, key: &Path) -> Option<CachedFileMetadataEntry>

Get a cached entry if it exists.

fn put( &self, key: &Path, value: CachedFileMetadataEntry, ) -> Option<CachedFileMetadataEntry>

Store a value in the cache.

fn remove(&self, k: &Path) -> Option<CachedFileMetadataEntry>

Remove an entry from the cache, returning the value if it existed.

fn contains_key(&self, k: &Path) -> bool

Check if the cache contains a specific key.

fn len(&self) -> usize

Fetch the total number of cache entries.

fn clear(&self)

Remove all entries from the cache.

fn name(&self) -> String

Return the cache name.

fn is_empty(&self) -> bool

Check if the cache collection is empty.

impl FileMetadataCache for DefaultFilesMetadataCache

fn cache_limit(&self) -> usize

Returns the cache’s memory limit in bytes.

fn update_cache_limit(&self, limit: usize)

Updates the cache with a new memory limit in bytes.

fn list_entries(&self) -> HashMap<Path, FileMetadataCacheEntry>

Retrieves the information about the entries currently cached.