Package org.infinispan

Interface DoubleCacheStream

    • Method Detail

      • filterKeySegments

        DoubleCacheStream filterKeySegments​(Set<Integer> segments)
        Filters which entries are returned by what segment they are present in. This method can be substantially more efficient than using a regular CacheStream.filter(Predicate) method as this can control what nodes are asked for data and what entries are read from the underlying CacheStore if present.
        Specified by:
        filterKeySegments in interface BaseCacheStream<Double,​DoubleStream>
        Parameters:
        segments - The segments to use for this stream operation. Any segments not in this set will be ignored.
        Returns:
        a stream with the segments filtered.

      • segmentCompletionListener

        DoubleCacheStream segmentCompletionListener​(BaseCacheStream.SegmentCompletionListener listener)
        Allows registration of a segment completion listener that is notified when a segment has completed processing. If the terminal operator has a short circuit this listener may never be called.

        This method is designed for the sole purpose of use with the CacheStream.iterator() to allow for a user to track completion of segments as they are returned from the iterator. Behavior of other methods is not specified. Please see CacheStream.iterator() for more information.

        Multiple listeners may be registered upon multiple invocations of this method. The ordering of notified listeners is not specified.

        This is only used if this stream did not invoke BaseCacheStream.disableRehashAware() and has no flat map based operations. If this is done no segments will be notified.

        Specified by:
        segmentCompletionListener in interface BaseCacheStream<Double,​DoubleStream>
        Parameters:
        listener - The listener that will be called back as segments are completed.
        Returns:
        a stream with the listener registered.

      • disableRehashAware

        DoubleCacheStream disableRehashAware()
        Disables tracking of rehash events that could occur to the underlying cache. If a rehash event occurs while a terminal operation is being performed it is possible for some values that are in the cache to not be found. Note that you will never have an entry duplicated when rehash awareness is disabled, only lost values.

        Most terminal operations will run faster with rehash awareness disabled even without a rehash occuring. However if a rehash occurs with this disabled be prepared to possibly receive only a subset of values.

        Specified by:
        disableRehashAware in interface BaseCacheStream<Double,​DoubleStream>
        Returns:
        a stream with rehash awareness disabled.

      • timeout

        DoubleCacheStream timeout​(long timeout,
                          TimeUnit unit)
        Sets a given time to wait for a remote operation to respond by. This timeout does nothing if the terminal operation does not go remote.

        If a timeout does occur then a TimeoutException is thrown from the terminal operation invoking thread or on the next call to the Iterator or Spliterator.

        Note that if a rehash occurs this timeout value is reset for the subsequent retry if rehash aware is enabled.

        Specified by:
        timeout in interface BaseCacheStream<Double,​DoubleStream>
        Parameters:
        timeout - the maximum time to wait
        unit - the time unit of the timeout argument
        Returns:
        a stream with the timeout set

      • filter

        default DoubleCacheStream filter​(org.infinispan.util.function.SerializableDoublePredicate predicate)
        Same as filter(DoublePredicate) except that the DoublePredicate must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        predicate - a non-interfering, stateless predicate to apply to each element to determine if it should be included
        Returns:
        the new cache double stream

      • map

        default DoubleCacheStream map​(org.infinispan.util.function.SerializableDoubleUnaryOperator mapper)
        Same as map(DoubleUnaryOperator) except that the DoubleUnaryOperator must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        mapper - a non-interfering, stateless function to apply to each element
        Returns:
        the new cache double stream

      • mapToObj

        default <U> CacheStream<U> mapToObj​(org.infinispan.util.function.SerializableDoubleFunction<? extends U> mapper)
        Same as mapToObj(DoubleFunction) except that the DoubleFunction must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Type Parameters:
        U - the element type of the new stream
        Parameters:
        mapper - a non-interfering, stateless function to apply to each element
        Returns:
        the new cache stream

      • mapToInt

        default IntCacheStream mapToInt​(org.infinispan.util.function.SerializableDoubleToIntFunction mapper)
        Same as mapToInt(DoubleToIntFunction) except that the DoubleToIntFunction must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        mapper - a non-interfering, stateless function to apply to each element
        Returns:
        the new cache int stream

      • mapToLong

        default LongCacheStream mapToLong​(org.infinispan.util.function.SerializableDoubleToLongFunction mapper)
        Same as mapToLong(DoubleToLongFunction) except that the DoubleToLongFunction must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        mapper - a non-interfering, stateless function to apply to each element
        Returns:
        the new cache long stream

      • flatMap

        default DoubleCacheStream flatMap​(org.infinispan.util.function.SerializableDoubleFunction<? extends DoubleStream> mapper)
        Same as flatMap(DoubleFunction) except that the DoubleFunction must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        mapper - a non-interfering, stateless function to apply to each element which produces a DoubleStream of new values
        Returns:
        the new cache double stream

      • peek

        default DoubleCacheStream peek​(org.infinispan.util.function.SerializableDoubleConsumer action)
        Same as flatMap(DoubleFunction) except that the DoubleFunction must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        action - a non-interfering action to perform on the elements as they are consumed from the stream
        Returns:
        the new cache double stream

      • limit

        DoubleCacheStream limit​(long maxSize)
        Returns:
        the new cache double stream

      • forEach

        default void forEach​(org.infinispan.util.function.SerializableDoubleConsumer action)
        Same as DoubleStream.forEach(DoubleConsumer) except that the DoubleConsumer must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        action - a non-interfering action to perform on the elements

      • forEach

        <K,​V> void forEach​(ObjDoubleConsumer<Cache<K,​V>> action)
        Same as DoubleStream.forEach(DoubleConsumer) except that it takes an ObjDoubleConsumer that provides access to the underlying Cache that is backing this stream.

        Note that the CacheAware interface is not supported for injection using this method as the cache is provided in the consumer directly.

        Type Parameters:
        K - key type of the cache
        V - value type of the cache
        Parameters:
        action - consumer to be ran for each element in the stream

      • forEach

        default <K,​V> void forEach​(org.infinispan.util.function.SerializableObjDoubleConsumer<Cache<K,​V>> action)
        Same as forEach(ObjDoubleConsumer) except that the BiConsumer must also implement Serializable
        Type Parameters:
        K - key type of the cache
        V - value type of the cache
        Parameters:
        action - consumer to be ran for each element in the stream

      • reduce

        default double reduce​(double identity,
                      org.infinispan.util.function.SerializableDoubleBinaryOperator op)
        Same as DoubleStream.reduce(double, DoubleBinaryOperator) except that the DoubleBinaryOperator must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        identity - the identity value for the accumulating function
        op - an associative, non-interfering, stateless function for combining two values
        Returns:
        the result of the reduction

      • reduce

        default OptionalDouble reduce​(org.infinispan.util.function.SerializableDoubleBinaryOperator op)
        Same as DoubleStream.reduce(DoubleBinaryOperator) except that the DoubleBinaryOperator must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        op - an associative, non-interfering, stateless function for combining two values
        Returns:
        the result of the reduction

      • collect

        default <R> R collect​(org.infinispan.util.function.SerializableSupplier<R> supplier,
                      org.infinispan.util.function.SerializableObjDoubleConsumer<R> accumulator,
                      org.infinispan.util.function.SerializableBiConsumer<R,​R> combiner)
        Same as DoubleStream.collect(Supplier, ObjDoubleConsumer, BiConsumer) except that the arguments must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Type Parameters:
        R - type of the result
        Parameters:
        supplier - a function that creates a new result container. For a parallel execution, this function may be called multiple times and must return a fresh value each time.
        accumulator - an associative, non-interfering, stateless function for incorporating an additional element into a result
        combiner - an associative, non-interfering, stateless function for combining two values, which must be compatible with the accumulator function
        Returns:
        the result of the reduction

      • anyMatch

        default boolean anyMatch​(org.infinispan.util.function.SerializableDoublePredicate predicate)
        Same as DoubleStream.anyMatch(DoublePredicate) except that the DoublePredicate must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        predicate - a non-interfering, stateless predicate to apply to elements of this stream
        Returns:
        true if any elements of the stream match the provided predicate, otherwise false

      • allMatch

        default boolean allMatch​(org.infinispan.util.function.SerializableDoublePredicate predicate)
        Same as DoubleStream.allMatch(DoublePredicate) except that the DoublePredicate must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        predicate - a non-interfering, stateless predicate to apply to elements of this stream
        Returns:
        true if either all elements of the stream match the provided predicate or the stream is empty, otherwise false

      • noneMatch

        default boolean noneMatch​(org.infinispan.util.function.SerializableDoublePredicate predicate)
        Same as DoubleStream.noneMatch(DoublePredicate) except that the DoublePredicate must also implement Serializable

        The compiler will pick this overload for lambda parameters, making them Serializable

        Parameters:
        predicate - a non-interfering, stateless predicate to apply to elements of this stream
        Returns:
        true if either no elements of the stream match the provided predicate or the stream is empty, otherwise false

      • boxed

        CacheStream<Double> boxed()
        Returns:
        the new cache stream containing doubles

      • sequential

        DoubleCacheStream sequential()
        Returns:
        a sequential cache double stream