class CaffeineCache[K, V] extends ConcurrentMapCache[K, V]
A com.twitter.cache.FutureCache backed by a
com.github.benmanes.caffeine.cache.Cache.
Any correct implementation should make sure that you evict failed results, and don't interrupt the underlying request that has been fired off. EvictingCache$ and interrupting com.twitter.util.Futures are useful tools for building correct FutureCaches. A reference implementation for caching the results of an asynchronous function with a caffeine Cache can be found at CaffeineCache$.fromCache.
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- def evict(key: K, value: Future[V]): Boolean
Evicts the contents of a
keyif the old value isvalue.Evicts the contents of a
keyif the old value isvalue.Since com.twitter.util.Future uses reference equality, you must use the same object reference to evict a value.
- returns
true if the key was evicted false if the key was not evicted
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- def finalize(): Unit
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- def get(key: K): Option[Future[V]]
Gets the cached Future.
Gets the cached Future.
- returns
None if a value hasn't been specified for that key yet Some(ksync computation) if the value has been specified. Just because this returns Some(..) doesn't mean that it has been satisfied, but if it hasn't been satisfied, it's probably in-flight.
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- ConcurrentMapCache → FutureCache
- final def getClass(): Class[_ <: AnyRef]
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- def getOrElseUpdate(k: K)(v: => Future[V]): Future[V]
Gets the cached Future, or if it hasn't been returned yet, computes it and returns that value.
Gets the cached Future, or if it hasn't been returned yet, computes it and returns that value.
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- CaffeineCache → ConcurrentMapCache → FutureCache
- def hashCode(): Int
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- def set(key: K, value: Future[V]): Unit
Unconditionally sets a value for a given key
Unconditionally sets a value for a given key
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- ConcurrentMapCache → FutureCache
- def size: Int
- returns
the number of results that have been computed successfully or are in flight.
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