cloffeine.common — com.appsflyer/cloffeine 0.2.0

cache-stats->map clj

(cache-stats->map cs)

Convert a CacheStats object readonly attributes to a Clojure map.

See: https://www.javadoc.io/static/com.github.ben-manes.caffeine/caffeine/2.8.0/com/github/benmanes/caffeine/cache/stats/CacheStats.html for actual metrics docs.

ifn->bifunction clj

(ifn->bifunction ifn)

ifn->function clj

(ifn->function ifn)

make-builder clj

(make-builder settings)

A builder for the various types of Caffeine's caches (AsyncCache, AsyncLoadingCache, Cache, LoadingCache). The corresponding create functions, accept and pass here this config to create the required cache. settings is a map with the keys (all optional):

• :recordStats boolean
• :statsCounterSupplier a com.github.benmanes.caffeine.cache.stats.StatsCounter, mutually exclusive with :recordStats
• :maximumSize long Specifies the maximum number of entries the cache may contain.
• :expireAfter com.github.benmanes.caffeine.cache.Expiry
• :expireAfterAccess long, references :timeUnit. Specifies that each entry should be automatically removed from the cache once a fixed duration has elapsed after the entry's creation, the most recent replacement of its value, or its last read.
• :expireAfterWrite long, references :timeUnit. Specifies that active entries are eligible for automatic refresh once a fixed duration has elapsed after the entry's creation, or the most recent replacement of its value.
• :executor java.util.concurrent.Executor Specifies the executor to use when running asynchronous tasks.
• :weakKeys boolean. Specifies that each key (not value) stored in the cache should be wrapped in a WeakReference (by default, strong references are used).
• :initialCapacity 'long'. Sets the minimum total size for the internal data structures.
• :softValues Boolean Specifies that each value (not key) stored in the cache should be wrapped in a SoftReference (by default, strong references are used). Softly-referenced objects will be garbage-collected in a globally least-recently-used manner, in response to memory demand.
• :ticker com.github.benmanes.caffeine.cache.Ticker Specifies a nanosecond-precision time source for use in determining when entries should be expired or refreshed. By default, System.nanoTime() is used.
• :weigher com.github.benmanes.caffeine.cache.Weigher Specifies the weigher to use in determining the weight of entries.
• :evictionListener com.github.benmanes.caffeine.cache.RemovalListener Specifies a listener instance that caches should notify each time an entry is removed for any reason. Each cache created by this builder will invoke this listener as part of the routine maintenance described in the class documentation above.
• :timeUnit [:ms :us :s :m :h :d] default is :s

reify-async-cache-loader clj

(reify-async-cache-loader loading-fn)

(reify-async-cache-loader loading-fn reloading-fn)

A helper for implementing an AsyncCacheLoader.

• loading-fn - (fn [this k executor]). Asynchronously computes or retrieves the value corresponding to key.
• reloading-fn (optional) (fn [this k old-val executor]) Asynchronously computes or retrieves a replacement value corresponding to an already-cached key. If the replacement value is not found then the mapping will be removed if nil is computed. This method is called when an existing cache entry is refreshed by Caffeine.refreshAfterWrite(java.time.Duration), or through a call to LoadingCache.refresh(K).

reify-cache-loader clj

(reify-cache-loader loading-fn)

(reify-cache-loader loading-fn reloading-fn)

A helper for implementing CacheLoader.

• loading-fn - (fn [this k]). Computes or retrieves the value corresponding to key.
• relaoding-fn - (fn [this k old-val]). Computes or retrieves a replacement value corresponding to an already-cached key.

reify-removal-listener clj

(reify-removal-listener removal-handler)

A helper for implementing RemovalListener

• removal-handler - (fn [k v removal-cause]). React upon removal of k. cause is a RemovalCause enum: {COLLECTED|EXPIRED|EXPLICIT|REPLACED|SIZE}

reify-weigher clj

(reify-weigher weigh-fn)

A helper for implementing Weigher.

• weigh-fn - (fn [this k v]). Returns the weight of a cache entry (int). There is no unit for entry weights; rather they are simply relative to each other.

stats clj

(stats c)

Returns a current snapshot of this cache's cumulative statistics.