Class

com.twitter.cache.guava

LoadingFutureCache

Related Doc: package guava

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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
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Instance Constructors

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

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Value Members

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

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

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

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    Definition Classes
    AnyRef → Any

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

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  5. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  6. def clone(): AnyRef

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

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

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    Definition Classes
    AnyRef

  8. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

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

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    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

  10. def finalize(): Unit

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

  11. def get(key: K): Option[Future[V]]

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    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

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

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    Definition Classes
    AnyRef → Any

  13. def getOrElseUpdate(k: K)(v: ⇒ Future[V]): Future[V]

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    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

  14. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  15. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

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

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    Definition Classes
    AnyRef

  17. final def notify(): Unit

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    Definition Classes
    AnyRef

  18. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

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

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    Unconditionally sets a value for a given key

    Unconditionally sets a value for a given key

    Definition Classes
    ConcurrentMapCache → FutureCache

  20. def size: Int

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    returns

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

    Definition Classes
    ConcurrentMapCache → FutureCache

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

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    Definition Classes
    AnyRef

  22. def toString(): String

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    Definition Classes
    AnyRef → Any

  23. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    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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