Struct CacheManager 

pub struct CacheManager { /* private fields */ }

File-based cache manager

Stores cache entries as JSON files in a cache directory. Supports TTL and manual invalidation strategies.

Implementations

impl CacheManager

pub fn new(cache_dir: impl AsRef<Path>) -> StorageResult<Self>

Create a new cache manager

Arguments

• cache_dir - Directory to store cache files

Errors

Returns error if cache directory cannot be created

pub fn get(&self, key: &str) -> StorageResult<Option<String>>

Get a cached value

Arguments

• key - Cache key

Returns

Returns the cached data if found and not expired, None if not found or expired

pub fn set( &self, key: &str, data: String, strategy: CacheInvalidationStrategy, ) -> StorageResult<()>

Set a cached value

Arguments

• key - Cache key
• data - Data to cache
• strategy - Invalidation strategy

Errors

Returns error if cache entry cannot be written

pub fn invalidate(&self, key: &str) -> StorageResult<bool>

Invalidate a cached value

Arguments

• key - Cache key to invalidate

Returns

Returns Ok(true) if entry was deleted, Ok(false) if entry didn’t exist

pub fn exists(&self, key: &str) -> StorageResult<bool>

Check if a key exists in cache and is not expired

Arguments

• key - Cache key

pub fn clear(&self) -> StorageResult<()>

Clear all cache entries

Errors

Returns error if cache directory cannot be cleared

pub fn cleanup_expired(&self) -> StorageResult<usize>

Clean up expired entries

Scans the cache directory and removes all expired entries.

Returns

Returns the number of entries cleaned up