com.twitter.cache.guava

LoadingFutureCache

class LoadingFutureCache[K, V] extends GuavaCache[K, V]

A com.twitter.cache.FutureCache backed by a com.google.common.cache.LoadingCache.

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 Future#interrupting are useful tools for building correct FutureCaches. A reference implementation for caching the results of an asynchronous function with a guava LoadingCache can be found at GuavaCache$.fromLoadingCache.

Linear Supertypes
GuavaCache[K, V], ConcurrentMapCache[K, V], FutureCache[K, V], AnyRef, Any
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Inherited
  1. LoadingFutureCache
  2. GuavaCache
  3. ConcurrentMapCache
  4. FutureCache
  5. AnyRef
  6. Any
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Visibility
  1. Public
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Instance Constructors

  1. new LoadingFutureCache(cache: LoadingCache[K, Future[V]])

Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any

  3. final def ##(): Int

    Definition Classes
    AnyRef → Any

  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any

  6. def apply(key: K): Future[V]

  7. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  8. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  9. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  10. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  11. def evict(key: K, value: Future[V]): Boolean

    Evicts the contents of a key if the old value is value.

    Evicts the contents of a key if the old value is value.

    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

    Definition Classes
    ConcurrentMapCache → FutureCache

  12. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  13. 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.

    Definition Classes
    LoadingFutureCache → ConcurrentMapCache → FutureCache

  14. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any

  15. 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.

    Definition Classes
    GuavaCache → ConcurrentMapCache → FutureCache

  16. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  17. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  18. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  19. final def notify(): Unit

    Definition Classes
    AnyRef

  20. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  21. def set(key: K, value: Future[V]): Unit

    Unconditionally sets a value for a given key

    Unconditionally sets a value for a given key

    Definition Classes
    ConcurrentMapCache → FutureCache

  22. def size: Int

    returns

    the number of results that have been computed successfully or are in flight.

    Definition Classes
    ConcurrentMapCache → FutureCache

  23. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef

  24. def toString(): String

    Definition Classes
    AnyRef → Any

  25. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  26. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  27. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from GuavaCache[K, V]

Inherited from ConcurrentMapCache[K, V]

Inherited from FutureCache[K, V]

Inherited from AnyRef

Inherited from Any

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