Struct FileCacheImpl 

pub struct FileCacheImpl<V> { /* private fields */ }

File-based cache implementation with TTL support.

Stores serialized data in JSON files with embedded metadata. When cache directory is unavailable (None), all operations become no-ops.

Implementations

impl<V> FileCacheImpl<V>

where V: Serialize + for<'de> Deserialize<'de>,

pub fn new(subdirectory: impl Into<String>, ttl: Duration) -> Self

Create a new file cache with default cache directory.

Arguments

• subdirectory - Subdirectory within cache directory
• ttl - Time-to-live for cache entries

If the cache directory cannot be determined, caching is disabled and a warning is emitted.

pub fn with_dir( cache_dir: Option<PathBuf>, subdirectory: impl Into<String>, ttl: Duration, ) -> Self

Create a new file cache with custom cache directory.

Arguments

• cache_dir - Base cache directory (None to disable caching)
• subdirectory - Subdirectory within cache directory
• ttl - Time-to-live for cache entries

Trait Implementations

impl<V> FileCache<V> for FileCacheImpl<V>

where V: Serialize + for<'de> Deserialize<'de>,

fn get(&self, key: &str) -> Result<Option<V>>

Get a cached value if it exists and is valid.

fn get_stale(&self, key: &str) -> Result<Option<V>>

Get a cached value regardless of TTL (stale fallback).

fn set(&self, key: &str, value: &V) -> Result<()>

Set a cached value.

fn remove(&self, key: &str) -> Result<()>

Remove a cached value.