Package com.github.benmanes.caffeine.cache

This package contains caching utilities.

See: Description

Interface Summary

Interface	Description
AsyncCacheLoader<K,V>	Computes or retrieves values asynchronously, based on a key, for use in populating a AsyncLoadingCache.
AsyncLoadingCache<K,V>	A semi-persistent mapping from keys to values.
Cache<K,V>	A semi-persistent mapping from keys to values.
CacheLoader<K,V>	Computes or retrieves values, based on a key, for use in populating a LoadingCache or AsyncLoadingCache.
CacheWriter<K,V>	Communicates the write or deletion of a value, based on a key, to an external resource.
Expiry<K,V>	Calculates when cache entries expire.
LoadingCache<K,V>	A semi-persistent mapping from keys to values.
Policy<K,V>	An access point for inspecting and performing low-level operations based on the cache's runtime characteristics.
Policy.Eviction<K,V>	The low-level operations for a cache with a size-based eviction policy.
Policy.Expiration<K,V>	The low-level operations for a cache with a fixed expiration policy.
Policy.VarExpiration<K,V>	The low-level operations for a cache with a variable expiration policy.
RemovalListener<K,V>	An object that can receive a notification when an entry is removed from a cache.
Ticker	A time source that returns a time value representing the number of nanoseconds elapsed since some fixed but arbitrary point in time.
Weigher<K,V>	Calculates the weights of cache entries.

Class Summary

Class	Description
Caffeine<K,V>	A builder of AsyncLoadingCache, LoadingCache, and Cache instances having a combination of the following features: automatic loading of entries into the cache, optionally asynchronously size-based eviction when a maximum is exceeded based on frequency and recency time-based expiration of entries, measured since last access or last write asynchronously refresh when the first stale request for an entry occurs keys automatically wrapped in weak references values automatically wrapped in weak or soft references writes propagated to an external resource notification of evicted (or otherwise removed) entries accumulation of cache access statistics
CaffeineSpec	A specification of a Caffeine builder configuration.

Enum Summary

Enum	Description
RemovalCause	The reason why a cached entry was removed.

Package com.github.benmanes.caffeine.cache Description

This package contains caching utilities.

The core interface used to represent caches is Cache. A cache may be specialized as either a LoadingCache or AsyncLoadingCache.

In-memory caches can be configured and created using Caffeine. The cache entries may be loaded by CacheLoader, weighed by Weigher, and on removal forwarded to RemovalListener. Statistics about cache performance are exposed using CacheStats.