Package org.redisson.api

Interface RSet<V>

Type Parameters:

V - type of value

All Superinterfaces:

Collection<V>, Iterable<V>, RCollectionAsync<V>, RExpirable, RExpirableAsync, RObject, RObjectAsync, RSetAsync<V>, RSortable<Set<V>>, RSortableAsync<Set<V>>, Set<V>

All Known Implementing Classes:

RedissonSet, RedissonSetMultimapValues, RedissonTransactionalSet

public interface RSet<V>
extends Set<V>, RExpirable, RSetAsync<V>, RSortable<Set<V>>

Redis based implementation of Set

Author:

Nikita Koksharov

Method Summary

Modifier and Type	Method	Description
int	addAllCounted(Collection<? extends V> c)	Adds all elements contained in the specified collection.
List<V>	containsEach(Collection<V> c)	Check if each element is contained in the specified collection.
Integer	countIntersection(int limit, String... names)	Counts elements of set as a result of sets intersection with current set.
Integer	countIntersection(String... names)	Counts elements of set as a result of sets intersection with current set.
int	diff(String... names)	Diff sets specified by name and write to current set.
Iterator<V>	distributedIterator(int count)	Returns element iterator that can be shared across multiple applications.
Iterator<V>	distributedIterator(String pattern)	Returns iterator over elements that match specified pattern.
Iterator<V>	distributedIterator(String iteratorName, String pattern, int count)	Returns iterator over elements that match specified pattern.
RCountDownLatch	getCountDownLatch(V value)	Returns RCountDownLatch instance associated with value
RLock	getFairLock(V value)	Returns RLock instance associated with value
RLock	getLock(V value)	Returns lock instance associated with value
RPermitExpirableSemaphore	getPermitExpirableSemaphore(V value)	Returns RPermitExpirableSemaphore instance associated with value
RReadWriteLock	getReadWriteLock(V value)	Returns RReadWriteLock instance associated with value
RSemaphore	getSemaphore(V value)	Returns RSemaphore instance associated with value
int	intersection(String... names)	Intersection sets specified by name and write to current set.
Iterator<V>	iterator(int count)	Returns elements iterator fetches elements in a batch.
Iterator<V>	iterator(String pattern)	Returns elements iterator.
Iterator<V>	iterator(String pattern, int count)	Returns elements iterator fetches elements in a batch.
<KOut, VOut> RCollectionMapReduce<V,KOut,VOut>	mapReduce()	Returns RMapReduce object associated with this object
boolean	move(String destination, V member)	Move a member from this set to the given destination set in.
V	random()	Returns random element
Set<V>	random(int count)	Returns random elements from set limited by count
Set<V>	readAll()	Read all elements at once
Set<V>	readDiff(String... names)	Diff sets specified by name with current set.
Set<V>	readIntersection(String... names)	Intersection sets specified by name with current set without current set state change.
Set<V>	readUnion(String... names)	Union sets specified by name with current set without current set state change.
int	removeAllCounted(Collection<? extends V> c)	Removes all elements contained in the specified collection.
V	removeRandom()	Removes and returns random element
Set<V>	removeRandom(int amount)	Removes and returns random elements limited by amount
Stream<V>	stream(int count)	Returns stream of elements fetches elements in a batch.
Stream<V>	stream(String pattern)	Returns stream of elements.
Stream<V>	stream(String pattern, int count)	Returns stream of elements fetches elements in a batch.
boolean	tryAdd(V... values)	Tries to add elements only if none of them in set.
int	union(String... names)	Union sets specified by name and write to current set.

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface org.redisson.api.RCollectionAsync

addAllAsync, addAsync, containsAllAsync, containsAsync, removeAllAsync, removeAsync, retainAllAsync, sizeAsync

Methods inherited from interface org.redisson.api.RExpirable

clearExpire, expire, expire, expire, expireAt, expireAt, expireIfGreater, expireIfGreater, expireIfLess, expireIfLess, expireIfNotSet, expireIfNotSet, expireIfSet, expireIfSet, getExpireTime, remainTimeToLive

Methods inherited from interface org.redisson.api.RExpirableAsync

clearExpireAsync, expireAsync, expireAsync, expireAsync, expireAtAsync, expireAtAsync, expireIfGreaterAsync, expireIfGreaterAsync, expireIfLessAsync, expireIfLessAsync, expireIfNotSetAsync, expireIfNotSetAsync, expireIfSetAsync, expireIfSetAsync, getExpireTimeAsync, remainTimeToLiveAsync

Methods inherited from interface org.redisson.api.RObject

addListener, copy, delete, dump, getCodec, getIdleTime, getName, isExists, migrate, move, removeListener, rename, renamenx, restore, restore, restoreAndReplace, restoreAndReplace, sizeInMemory, touch, unlink

Methods inherited from interface org.redisson.api.RObjectAsync

addListenerAsync, copyAsync, deleteAsync, dumpAsync, getIdleTimeAsync, isExistsAsync, migrateAsync, moveAsync, removeListenerAsync, renameAsync, renamenxAsync, restoreAndReplaceAsync, restoreAndReplaceAsync, restoreAsync, restoreAsync, sizeInMemoryAsync, touchAsync, unlinkAsync

Methods inherited from interface org.redisson.api.RSetAsync

addAllCountedAsync, containsEachAsync, countIntersectionAsync, countIntersectionAsync, diffAsync, intersectionAsync, moveAsync, randomAsync, randomAsync, readAllAsync, readDiffAsync, readIntersectionAsync, readUnionAsync, removeAllCountedAsync, removeRandomAsync, removeRandomAsync, tryAddAsync, unionAsync

Methods inherited from interface org.redisson.api.RSortable

readSort, readSort, readSort, readSort, readSort, readSort, readSortAlpha, readSortAlpha, readSortAlpha, readSortAlpha, readSortAlpha, readSortAlpha, sortTo, sortTo, sortTo, sortTo, sortTo, sortTo

Methods inherited from interface org.redisson.api.RSortableAsync

readSortAlphaAsync, readSortAlphaAsync, readSortAlphaAsync, readSortAlphaAsync, readSortAlphaAsync, readSortAlphaAsync, readSortAsync, readSortAsync, readSortAsync, readSortAsync, readSortAsync, readSortAsync, sortToAsync, sortToAsync, sortToAsync, sortToAsync, sortToAsync, sortToAsync

Methods inherited from interface java.util.Set

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, spliterator, toArray, toArray

Method Details

addAllCounted

int addAllCounted(Collection<? extends V> c)

Adds all elements contained in the specified collection. Returns number of added elements.

Parameters:

c - - collection of elements to add

Returns:

number of added elements

removeAllCounted

int removeAllCounted(Collection<? extends V> c)

Removes all elements contained in the specified collection. Returns number of removed elements.

Parameters:

c - - collection of elements to add

Returns:

number of removed elements

getCountDownLatch

RCountDownLatch getCountDownLatch(V value)

Returns RCountDownLatch instance associated with value

Parameters:

value - - set value

Returns:

RCountDownLatch object

getPermitExpirableSemaphore

RPermitExpirableSemaphore getPermitExpirableSemaphore(V value)

Returns RPermitExpirableSemaphore instance associated with value

Parameters:

value - - set value

Returns:

RPermitExpirableSemaphore object

getSemaphore

RSemaphore getSemaphore(V value)

Returns RSemaphore instance associated with value

Parameters:

value - - set value

Returns:

RSemaphore object

getFairLock

RLock getFairLock(V value)

Returns RLock instance associated with value

Parameters:

value - - set value

Returns:

RLock object

getReadWriteLock

RReadWriteLock getReadWriteLock(V value)

Returns RReadWriteLock instance associated with value

Parameters:

value - - set value

Returns:

RReadWriteLock object

getLock

RLock getLock(V value)

Returns lock instance associated with value

Parameters:

value - - set value

Returns:

RLock object

stream

Stream<V> stream(int count)

Returns stream of elements fetches elements in a batch. Batch size is defined by count param.

Parameters:

count - - size of elements batch

Returns:

stream of elements

stream

Stream<V> stream(String pattern,
 int count)

Returns stream of elements fetches elements in a batch. Batch size is defined by count param. If pattern is not null then only elements match this pattern are loaded.

Parameters:

pattern - - search pattern

count - - size of elements batch

Returns:

stream of elements

stream

Stream<V> stream(String pattern)

Returns stream of elements. If pattern is not null then only elements match this pattern are loaded.

Parameters:

pattern - - search pattern

Returns:

stream of elements

iterator

Iterator<V> iterator(int count)

Returns elements iterator fetches elements in a batch. Batch size is defined by count param.

Parameters:

count - - size of elements batch

Returns:

iterator

iterator

Iterator<V> iterator(String pattern,
 int count)

Returns elements iterator fetches elements in a batch. Batch size is defined by count param. If pattern is not null then only elements match this pattern are loaded.

Parameters:

pattern - - search pattern

count - - size of elements batch

Returns:

iterator

iterator

Iterator<V> iterator(String pattern)

Returns elements iterator. If pattern is not null then only elements match this pattern are loaded.

Parameters:

pattern - - search pattern

Returns:

iterator

distributedIterator

Iterator<V> distributedIterator(int count)

Returns element iterator that can be shared across multiple applications. Creating multiple iterators on the same object with this method will result in a single shared iterator. See distributedIterator(String, String, int) for creating different iterators.

Parameters:

count - batch size

Returns:

shared elements iterator

distributedIterator

Iterator<V> distributedIterator(String pattern)

Returns iterator over elements that match specified pattern. Iterator can be shared across multiple applications. Creating multiple iterators on the same object with this method will result in a single shared iterator. See distributedIterator(String, String, int) for creating different iterators.

Parameters:

pattern - element pattern

Returns:

shared elements iterator

distributedIterator

Iterator<V> distributedIterator(String iteratorName,
 String pattern,
 int count)

Returns iterator over elements that match specified pattern. Iterator can be shared across multiple applications. Creating multiple iterators on the same object with this method will result in a single shared iterator. Iterator name must be resolved to the same hash slot as set name.

Parameters:

pattern - element pattern

count - batch size

iteratorName - redis object name to which cursor will be saved

Returns:

shared elements iterator

mapReduce

<KOut,
VOut> RCollectionMapReduce<V,KOut,VOut> mapReduce()

Returns RMapReduce object associated with this object

Type Parameters:

KOut - output key

VOut - output value

Returns:

MapReduce instance

removeRandom

Set<V> removeRandom(int amount)

Removes and returns random elements limited by amount

Parameters:

amount - of random elements

Returns:

random elements

removeRandom

V removeRandom()

Removes and returns random element

Returns:

random element

random

V random()

Returns random element

Returns:

random element

random

Set<V> random(int count)

Returns random elements from set limited by count

Parameters:

count - - values amount to return

Returns:

random elements

move

boolean move(String destination,
 V member)

Move a member from this set to the given destination set in.

Parameters:

destination - the destination set

member - the member to move

Returns:

true if the element is moved, false if the element is not a member of this set or no operation was performed

readAll

Set<V> readAll()

Read all elements at once

Returns:

values

union

int union(String... names)

Union sets specified by name and write to current set. If current set already exists, it is overwritten.

Parameters:

names - - name of sets

Returns:

size of union

readUnion

Set<V> readUnion(String... names)

Union sets specified by name with current set without current set state change.

Parameters:

names - - name of sets

Returns:

values

diff

int diff(String... names)

Diff sets specified by name and write to current set. If current set already exists, it is overwritten.

Parameters:

names - - name of sets

Returns:

values

readDiff

Set<V> readDiff(String... names)

Diff sets specified by name with current set. Without current set state change.

Parameters:

names - - name of sets

Returns:

values

intersection

int intersection(String... names)

Intersection sets specified by name and write to current set. If current set already exists, it is overwritten.

Parameters:

names - - name of sets

Returns:

size of intersection

readIntersection

Set<V> readIntersection(String... names)

Intersection sets specified by name with current set without current set state change.

Parameters:

names - - name of sets

Returns:

values

countIntersection

Integer countIntersection(String... names)

Counts elements of set as a result of sets intersection with current set.

Requires Redis 7.0.0 and higher.

Parameters:

names - - name of sets

Returns:

amount of elements

countIntersection

Integer countIntersection(int limit,
 String... names)

Counts elements of set as a result of sets intersection with current set.

Requires Redis 7.0.0 and higher.

Parameters:

names - - name of sets

limit - - sets intersection limit

Returns:

amount of elements

tryAdd

boolean tryAdd(V... values)

Tries to add elements only if none of them in set.

Parameters:

values - - values to add

Returns:

true if elements successfully added, otherwise false.

containsEach

List<V> containsEach(Collection<V> c)

Check if each element is contained in the specified collection. Returns contained elements.

Requires Redis 6.2.0 and higher.

Parameters:

c - - collection to check

Returns:

contained elements