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MokaCacheBackend

lance::cache

Struct MokaCacheBackend 

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pub struct MokaCacheBackend { /* private fields */ }
Expand description

Default CacheBackend backed by a moka cache.

Provides weighted-capacity eviction and concurrent-load deduplication via moka’s built-in optionally_get_with.

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impl CacheBackend for MokaCacheBackend

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fn get<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 InternalCacheKey, _codec: Option<CacheCodec>, ) -> Pin<Box<dyn Future<Output = Option<Arc<dyn Any + Sync + Send>>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, MokaCacheBackend: 'async_trait,

Look up an entry by its key. Read more
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fn insert<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 InternalCacheKey, entry: Arc<dyn Any + Sync + Send>, size_bytes: usize, _codec: Option<CacheCodec>, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, MokaCacheBackend: 'async_trait,

Store an entry. size_bytes is used for eviction accounting. Read more
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fn get_or_insert<'a, 'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 InternalCacheKey, loader: Pin<Box<dyn Future<Output = Result<(Arc<dyn Any + Sync + Send>, usize), Error>> + Send + 'a>>, _codec: Option<CacheCodec>, ) -> Pin<Box<dyn Future<Output = Result<(Arc<dyn Any + Sync + Send>, bool), Error>> + Send + 'async_trait>>
where 'a: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, MokaCacheBackend: 'async_trait,

Get an existing entry or compute it from loader. Read more
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fn invalidate_prefix<'life0, 'life1, 'async_trait>( &'life0 self, prefix: &'life1 str, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, MokaCacheBackend: 'async_trait,

Remove all entries whose prefix starts with the given string.
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fn clear<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where 'life0: 'async_trait, MokaCacheBackend: 'async_trait,

Remove all entries.
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fn num_entries<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = usize> + Send + 'async_trait>>
where 'life0: 'async_trait, MokaCacheBackend: 'async_trait,

Number of entries currently stored (may flush pending operations).
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fn size_bytes<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = usize> + Send + 'async_trait>>
where 'life0: 'async_trait, MokaCacheBackend: 'async_trait,

Total weighted size in bytes of all stored entries (may flush pending operations).
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fn approx_num_entries(&self) -> usize

Approximate number of entries, callable from synchronous contexts. Backends that cannot provide this cheaply should return 0.
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fn approx_size_bytes(&self) -> usize

Approximate weighted size in bytes, callable from synchronous contexts. Used by DeepSizeOf to report cache memory usage. Backends that cannot provide this cheaply should return 0. Read more
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impl Debug for MokaCacheBackend

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

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