org.redisson.api

Interface RDeque<V>

Type Parameters:

V - the type of elements held in this collection

All Superinterfaces:

Collection<V>, Deque<V>, Iterable<V>, Queue<V>, RCollectionAsync<V>, RDequeAsync<V>, RExpirable, RExpirableAsync, RObject, RObjectAsync, RQueue<V>, RQueueAsync<V>

All Known Subinterfaces:

RBlockingDeque<V>, RPriorityBlockingDeque<V>, RPriorityDeque<V>

All Known Implementing Classes:

RedissonBlockingDeque, RedissonDeque, RedissonPriorityBlockingDeque, RedissonPriorityDeque

public interface RDeque<V>
extends Deque<V>, RQueue<V>, RDequeAsync<V>

Distributed implementation of Deque

Author:

Nikita Koksharov

Method Summary

Modifier and Type	Method and Description
int	addFirstIfExists(V... elements) Adds element at the head of existing deque.
int	addLastIfExists(V... elements) Adds element at the tail of existing deque.
V	move(DequeMoveArgs args) Move element from this deque to the given destination deque.
List<V>	pollFirst(int limit) Retrieves and removes the head elements of this queue.
List<V>	pollLast(int limit) Retrieves and removes the tail elements of this queue.

Methods inherited from interface java.util.Deque

add, addFirst, addLast, contains, descendingIterator, element, getFirst, getLast, iterator, offer, offerFirst, offerLast, peek, peekFirst, peekLast, poll, pollFirst, pollLast, pop, push, remove, remove, removeFirst, removeFirstOccurrence, removeLast, removeLastOccurrence, size

Methods inherited from interface org.redisson.api.RQueue

addListener, poll, pollLastAndOfferFirstTo, readAll

Methods inherited from interface java.util.Collection

addAll, clear, containsAll, equals, hashCode, isEmpty, parallelStream, removeAll, removeIf, retainAll, spliterator, stream, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface org.redisson.api.RExpirable

clearExpire, expire, expire, expireAt, expireAt, remainTimeToLive

Methods inherited from interface org.redisson.api.RObject

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.RDequeAsync

addFirstAsync, addFirstIfExistsAsync, addLastAsync, addLastIfExistsAsync, getLastAsync, moveAsync, offerFirstAsync, offerLastAsync, peekFirstAsync, peekLastAsync, pollFirstAsync, pollFirstAsync, pollLastAsync, pollLastAsync, popAsync, pushAsync, removeFirstAsync, removeFirstOccurrenceAsync, removeLastAsync, removeLastOccurrenceAsync

Methods inherited from interface org.redisson.api.RQueueAsync

addListenerAsync, offerAsync, peekAsync, pollAsync, pollAsync, pollLastAndOfferFirstToAsync, readAllAsync

Methods inherited from interface org.redisson.api.RCollectionAsync

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

Methods inherited from interface org.redisson.api.RExpirableAsync

clearExpireAsync, expireAsync, expireAsync, expireAtAsync, expireAtAsync, remainTimeToLiveAsync

Methods inherited from interface org.redisson.api.RObjectAsync

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

Method Detail

addFirstIfExists

int addFirstIfExists(V... elements)

Adds element at the head of existing deque.

Parameters:

elements - - elements to add

Returns:

length of the list

addLastIfExists

int addLastIfExists(V... elements)

Adds element at the tail of existing deque.

Parameters:

elements - - elements to add

Returns:

length of the list

pollLast

List<V> pollLast(int limit)

Retrieves and removes the tail elements of this queue. Elements amount limited by limit param.

Returns:

list of tail elements

pollFirst

List<V> pollFirst(int limit)

Retrieves and removes the head elements of this queue. Elements amount limited by limit param.

Returns:

list of head elements

move

V move(DequeMoveArgs args)

Move element from this deque to the given destination deque. Returns moved element.

Usage examples:

 V element = deque.move(DequeMoveArgs.pollLast()
                                 .addFirstTo("deque2"));
 

 V elements = deque.move(DequeMoveArgs.pollFirst()
                                 .addLastTo("deque2"));
 

Requires Redis 6.2.0 and higher.

Parameters:

args - - arguments object

Returns:

moved element