Package org.infinispan.stream.impl

Class IntermediateLongCacheStream

java.lang.Object

org.infinispan.stream.impl.IntermediateLongCacheStream

All Implemented Interfaces:

AutoCloseable, BaseStream<Long,LongStream>, LongStream, BaseCacheStream<Long,LongStream>, LongCacheStream

public class IntermediateLongCacheStream
extends Object
implements LongCacheStream

An intermediate long cache stream used when an intermediate operation that requires both a remote and local portion

Nested Class Summary

Nested classes/interfaces inherited from interface org.infinispan.BaseCacheStream

BaseCacheStream.SegmentCompletionListener

Nested classes/interfaces inherited from interface java.util.stream.LongStream

LongStream.Builder

Constructor Summary

Constructors

Constructor	Description
IntermediateLongCacheStream(BaseCacheStream remoteStream, IntermediateType type, org.infinispan.stream.impl.local.LocalLongCacheStream localLongStream, org.infinispan.stream.impl.IntermediateCacheStreamSupplier supplier)
IntermediateLongCacheStream(DistributedLongCacheStream remoteStream)

Method Summary

Modifier and Type	Method	Description
boolean	allMatch(LongPredicate predicate)
boolean	anyMatch(LongPredicate predicate)
DoubleCacheStream	asDoubleStream()
OptionalDouble	average()
CacheStream<Long>	boxed()
void	close()
<R> R	collect(Supplier<R> supplier, ObjLongConsumer<R> accumulator, BiConsumer<R,R> combiner)
long	count()
LongCacheStream	disableRehashAware()	Disables tracking of rehash events that could occur to the underlying cache.
LongCacheStream	distinct()
LongCacheStream	distributedBatchSize(int batchSize)	Controls how many keys are returned from a remote node when using a stream terminal operation with a distributed cache to back this stream.
LongCacheStream	filter(LongPredicate predicate)
LongCacheStream	filterKeys(Set<?> keys)	Filters which entries are returned by only returning ones that map to the given key.
LongCacheStream	filterKeySegments(Set<Integer> segments)	Filters which entries are returned by what segment they are present in.
LongCacheStream	filterKeySegments(org.infinispan.commons.util.IntSet segments)	Filters which entries are returned by what segment they are present in.
OptionalLong	findAny()
OptionalLong	findFirst()
LongCacheStream	flatMap(LongFunction<? extends LongStream> mapper)
void	forEach(LongConsumer action)
<K,V> void	forEach(ObjLongConsumer<Cache<K,V>> action)	Same as LongStream.forEach(LongConsumer) except that it takes an ObjLongConsumer that provides access to the underlying Cache that is backing this stream.
void	forEachOrdered(LongConsumer action)
boolean	isParallel()
PrimitiveIterator.OfLong	iterator()
LongCacheStream	limit(long maxSize)
LongCacheStream	map(LongUnaryOperator mapper)
DoubleCacheStream	mapToDouble(LongToDoubleFunction mapper)
IntCacheStream	mapToInt(LongToIntFunction mapper)
<U> CacheStream<U>	mapToObj(LongFunction<? extends U> mapper)
OptionalLong	max()
OptionalLong	min()
boolean	noneMatch(LongPredicate predicate)
LongCacheStream	onClose(Runnable closeHandler)
LongCacheStream	parallel()
LongCacheStream	parallelDistribution()	This would enable sending requests to all other remote nodes when a terminal operator is performed.
LongCacheStream	peek(LongConsumer action)
long	reduce(long identity, LongBinaryOperator op)
OptionalLong	reduce(LongBinaryOperator op)
LongCacheStream	segmentCompletionListener(BaseCacheStream.SegmentCompletionListener listener)	Allows registration of a segment completion listener that is notified when a segment has completed processing.
LongCacheStream	sequential()
LongCacheStream	sequentialDistribution()	This would disable sending requests to all other remote nodes compared to one at a time.
LongCacheStream	skip(long n)
LongCacheStream	sorted()
Spliterator.OfLong	spliterator()
long	sum()
LongSummaryStatistics	summaryStatistics()
LongCacheStream	timeout(long timeout, TimeUnit unit)	Sets a given time to wait for a remote operation to respond by.
long[]	toArray()
LongCacheStream	unordered()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.infinispan.LongCacheStream

allMatch, anyMatch, collect, filter, flatMap, forEach, forEach, map, mapToDouble, mapToInt, mapToObj, noneMatch, peek, reduce, reduce

Methods inherited from interface java.util.stream.LongStream

dropWhile, takeWhile

Constructor Detail

IntermediateLongCacheStream

public IntermediateLongCacheStream(DistributedLongCacheStream remoteStream)

IntermediateLongCacheStream

public IntermediateLongCacheStream(BaseCacheStream remoteStream,
                                   IntermediateType type,
                                   org.infinispan.stream.impl.local.LocalLongCacheStream localLongStream,
                                   org.infinispan.stream.impl.IntermediateCacheStreamSupplier supplier)

Method Detail

sequentialDistribution

public LongCacheStream sequentialDistribution()

Description copied from interface: LongCacheStream

This would disable sending requests to all other remote nodes compared to one at a time. This can reduce memory pressure on the originator node at the cost of performance.

Parallel distribution is enabled by default except for CacheStream.iterator() and CacheStream.spliterator()

Specified by:

sequentialDistribution in interface BaseCacheStream<Long,LongStream>

Specified by:

sequentialDistribution in interface LongCacheStream

Returns:

a stream with parallel distribution disabled.

parallelDistribution

public LongCacheStream parallelDistribution()

Description copied from interface: BaseCacheStream

This would enable sending requests to all other remote nodes when a terminal operator is performed. This requires additional overhead as it must process results concurrently from various nodes, but should perform faster in the majority of cases.

Parallel distribution is enabled by default except for CacheStream.iterator() and CacheStream.spliterator()

Specified by:

parallelDistribution in interface BaseCacheStream<Long,LongStream>

Specified by:

parallelDistribution in interface LongCacheStream

Returns:

a stream with parallel distribution enabled.

filterKeySegments

public LongCacheStream filterKeySegments(Set<Integer> segments)

Description copied from interface: LongCacheStream

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<Long,LongStream>

Specified by:

filterKeySegments in interface LongCacheStream

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.

filterKeySegments

public LongCacheStream filterKeySegments(org.infinispan.commons.util.IntSet segments)

Description copied from interface: BaseCacheStream

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<Long,LongStream>

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.

filterKeys

public LongCacheStream filterKeys(Set<?> keys)

Description copied from interface: LongCacheStream

Filters which entries are returned by only returning ones that map to the given key. This method will be faster than a regular CacheStream.filter(Predicate) if the filter is holding references to the same keys.

Specified by:

filterKeys in interface BaseCacheStream<Long,LongStream>

Specified by:

filterKeys in interface LongCacheStream

Parameters:

keys - The keys that this stream will only operate on.

Returns:

a stream with the keys filtered.

distributedBatchSize

public LongCacheStream distributedBatchSize(int batchSize)

Description copied from interface: LongCacheStream

Controls how many keys are returned from a remote node when using a stream terminal operation with a distributed cache to back this stream. This value is ignored when terminal operators that don't track keys are used. Key tracking terminal operators are CacheStream.iterator(), CacheStream.spliterator(), CacheStream.forEach(Consumer). Please see those methods for additional information on how this value may affect them.

This value may be used in the case of a a terminal operator that doesn't track keys if an intermediate operation is performed that requires bringing keys locally to do computations. Examples of such intermediate operations are CacheStream.sorted(), CacheStream.sorted(Comparator), CacheStream.distinct(), CacheStream.limit(long), CacheStream.skip(long)

This value is always ignored when this stream is backed by a cache that is not distributed as all values are already local.

Specified by:

distributedBatchSize in interface BaseCacheStream<Long,LongStream>

Specified by:

distributedBatchSize in interface LongCacheStream

Parameters:

batchSize - The size of each batch. This defaults to the state transfer chunk size.

Returns:

a stream with the batch size updated

segmentCompletionListener

public LongCacheStream segmentCompletionListener(BaseCacheStream.SegmentCompletionListener listener)

Description copied from interface: LongCacheStream

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<Long,LongStream>

Specified by:

segmentCompletionListener in interface LongCacheStream

Parameters:

listener - The listener that will be called back as segments are completed.

Returns:

a stream with the listener registered.

disableRehashAware

public LongCacheStream disableRehashAware()

Description copied from interface: LongCacheStream

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<Long,LongStream>

Specified by:

disableRehashAware in interface LongCacheStream

Returns:

a stream with rehash awareness disabled.

timeout

public LongCacheStream timeout(long timeout,
                               TimeUnit unit)

Description copied from interface: LongCacheStream

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<Long,LongStream>

Specified by:

timeout in interface LongCacheStream

Parameters:

timeout - the maximum time to wait

unit - the time unit of the timeout argument

Returns:

a stream with the timeout set

isParallel

public boolean isParallel()

Specified by:

isParallel in interface BaseStream<Long,LongStream>

sorted

public LongCacheStream sorted()

Description copied from interface: LongCacheStream

Specified by:

sorted in interface LongCacheStream

Specified by:

sorted in interface LongStream

Returns:

the new cache long stream

limit

public LongCacheStream limit(long maxSize)

Description copied from interface: LongCacheStream

Specified by:

limit in interface LongCacheStream

Specified by:

limit in interface LongStream

Returns:

the new cache long stream

skip

public LongCacheStream skip(long n)

Description copied from interface: LongCacheStream

Specified by:

skip in interface LongCacheStream

Specified by:

skip in interface LongStream

Returns:

the new cache long stream

peek

public LongCacheStream peek(LongConsumer action)

Description copied from interface: LongCacheStream

Specified by:

peek in interface LongCacheStream

Specified by:

peek in interface LongStream

Returns:

the new cache long stream

distinct

public LongCacheStream distinct()

Description copied from interface: LongCacheStream

Specified by:

distinct in interface LongCacheStream

Specified by:

distinct in interface LongStream

Returns:

the new cache long stream

filter

public LongCacheStream filter(LongPredicate predicate)

Description copied from interface: LongCacheStream

Specified by:

filter in interface LongCacheStream

Specified by:

filter in interface LongStream

Returns:

the new cache long stream

map

public LongCacheStream map(LongUnaryOperator mapper)

Description copied from interface: LongCacheStream

Specified by:

map in interface LongCacheStream

Specified by:

map in interface LongStream

Returns:

the new cache long stream

mapToObj

public <U> CacheStream<U> mapToObj(LongFunction<? extends U> mapper)

Description copied from interface: LongCacheStream

Specified by:

mapToObj in interface LongCacheStream

Specified by:

mapToObj in interface LongStream

Returns:

the new cache stream

mapToInt

public IntCacheStream mapToInt(LongToIntFunction mapper)

Description copied from interface: LongCacheStream

Specified by:

mapToInt in interface LongCacheStream

Specified by:

mapToInt in interface LongStream

Returns:

the new cache int stream

mapToDouble

public DoubleCacheStream mapToDouble(LongToDoubleFunction mapper)

Description copied from interface: LongCacheStream

Specified by:

mapToDouble in interface LongCacheStream

Specified by:

mapToDouble in interface LongStream

Returns:

the new cache double stream

flatMap

public LongCacheStream flatMap(LongFunction<? extends LongStream> mapper)

Description copied from interface: LongCacheStream

Specified by:

flatMap in interface LongCacheStream

Specified by:

flatMap in interface LongStream

Returns:

the new cache long stream

parallel

public LongCacheStream parallel()

Description copied from interface: LongCacheStream

Specified by:

parallel in interface BaseStream<Long,LongStream>

Specified by:

parallel in interface LongCacheStream

Specified by:

parallel in interface LongStream

Returns:

a parallel cache long stream

iterator

public PrimitiveIterator.OfLong iterator()

Specified by:

iterator in interface BaseStream<Long,LongStream>

Specified by:

iterator in interface LongStream

spliterator

public Spliterator.OfLong spliterator()

Specified by:

spliterator in interface BaseStream<Long,LongStream>

Specified by:

spliterator in interface LongStream

sequential

public LongCacheStream sequential()

Description copied from interface: LongCacheStream

Specified by:

sequential in interface BaseStream<Long,LongStream>

Specified by:

sequential in interface LongCacheStream

Specified by:

sequential in interface LongStream

Returns:

a sequential cache long stream

unordered

public LongCacheStream unordered()

Description copied from interface: LongCacheStream

Specified by:

unordered in interface BaseStream<Long,LongStream>

Specified by:

unordered in interface LongCacheStream

Returns:

an unordered cache long stream

forEach

public void forEach(LongConsumer action)

Specified by:

forEach in interface LongStream

forEach

public <K,V> void forEach(ObjLongConsumer<Cache<K,V>> action)

Description copied from interface: LongCacheStream

Same as LongStream.forEach(LongConsumer) except that it takes an ObjLongConsumer 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.

Specified by:

forEach in interface LongCacheStream

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

forEachOrdered

public void forEachOrdered(LongConsumer action)

Specified by:

forEachOrdered in interface LongStream

toArray

public long[] toArray()

Specified by:

toArray in interface LongStream

reduce

public long reduce(long identity,
                   LongBinaryOperator op)

Specified by:

reduce in interface LongStream

reduce

public OptionalLong reduce(LongBinaryOperator op)

Specified by:

reduce in interface LongStream

collect

public <R> R collect(Supplier<R> supplier,
                     ObjLongConsumer<R> accumulator,
                     BiConsumer<R,R> combiner)

Specified by:

collect in interface LongStream

sum

public long sum()

Specified by:

sum in interface LongStream

min

public OptionalLong min()

Specified by:

min in interface LongStream

max

public OptionalLong max()

Specified by:

max in interface LongStream

count

public long count()

Specified by:

count in interface LongStream

average

public OptionalDouble average()

Specified by:

average in interface LongStream

summaryStatistics

public LongSummaryStatistics summaryStatistics()

Specified by:

summaryStatistics in interface LongStream

anyMatch

public boolean anyMatch(LongPredicate predicate)

Specified by:

anyMatch in interface LongStream

allMatch

public boolean allMatch(LongPredicate predicate)

Specified by:

allMatch in interface LongStream

noneMatch

public boolean noneMatch(LongPredicate predicate)

Specified by:

noneMatch in interface LongStream

findFirst

public OptionalLong findFirst()

Specified by:

findFirst in interface LongStream

findAny

public OptionalLong findAny()

Specified by:

findAny in interface LongStream

boxed

public CacheStream<Long> boxed()

Description copied from interface: LongCacheStream

Specified by:

boxed in interface LongCacheStream

Specified by:

boxed in interface LongStream

Returns:

the new cache stream containing longs

asDoubleStream

public DoubleCacheStream asDoubleStream()

Description copied from interface: LongCacheStream

Specified by:

asDoubleStream in interface LongCacheStream

Specified by:

asDoubleStream in interface LongStream

Returns:

the cache double stream

onClose

public LongCacheStream onClose(Runnable closeHandler)

Description copied from interface: LongCacheStream

Specified by:

onClose in interface BaseStream<Long,LongStream>

Specified by:

onClose in interface LongCacheStream

Returns:

a cache long stream with the handler applied

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface BaseStream<Long,LongStream>