org.redisson.api

Interface RDequeAsync<V>

Type Parameters:

V - the type of elements held in this collection

All Superinterfaces:

RCollectionAsync<V>, RExpirableAsync, RObjectAsync, RQueueAsync<V>

All Known Subinterfaces:

RBlockingDeque<V>, RBlockingDequeAsync<V>, RDeque<V>, RPriorityBlockingDeque<V>, RPriorityDeque<V>

All Known Implementing Classes:

RedissonBlockingDeque, RedissonDeque, RedissonPriorityBlockingDeque, RedissonPriorityDeque

public interface RDequeAsync<V>
extends RQueueAsync<V>

Distributed async implementation of Deque

Author:

Nikita Koksharov

Method Summary

Modifier and Type	Method and Description
RFuture<Void>	addFirstAsync(V e) Adds element at the head of this deque.
RFuture<Integer>	addFirstIfExistsAsync(V... elements) Adds element at the head of existing deque.
RFuture<Void>	addLastAsync(V e) Adds element at the tail of this deque.
RFuture<Integer>	addLastIfExistsAsync(V... elements) Adds element at the tail of existing deque.
RFuture<V>	getLastAsync() Returns element at the tail of this deque or null if there are no elements in deque.
RFuture<V>	moveAsync(DequeMoveArgs args) Move element from this deque to the given destination deque.
RFuture<Boolean>	offerFirstAsync(V e) Adds element at the head of this deque.
RFuture<Boolean>	offerLastAsync(V e) Adds element at the tail of this deque.
RFuture<V>	peekFirstAsync() Returns element at the head of this deque or null if there are no elements in deque.
RFuture<V>	peekLastAsync() Returns element at the tail of this deque or null if there are no elements in deque.
RFuture<V>	pollFirstAsync() Retrieves and removes element at the head of this deque.
RFuture<List<V>>	pollFirstAsync(int limit) Retrieves and removes the head elements of this queue.
RFuture<V>	pollLastAsync() Retrieves and removes element at the tail of this deque.
RFuture<List<V>>	pollLastAsync(int limit) Retrieves and removes the tail elements of this queue.
RFuture<V>	popAsync() Retrieves and removes element at the head of this deque.
RFuture<Void>	pushAsync(V e) Adds element at the head of this deque.
RFuture<V>	removeFirstAsync() Retrieves and removes the first element of deque.
RFuture<Boolean>	removeFirstOccurrenceAsync(Object o) Removes first occurrence of element o
RFuture<V>	removeLastAsync() Retrieves and removes the last element of deque.
RFuture<Boolean>	removeLastOccurrenceAsync(Object o) Removes last occurrence of element o

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

addFirstIfExistsAsync

RFuture<Integer> addFirstIfExistsAsync(V... elements)

Adds element at the head of existing deque.

Parameters:

elements - - elements to add

Returns:

length of the list

addLastIfExistsAsync

RFuture<Integer> addLastIfExistsAsync(V... elements)

Adds element at the tail of existing deque.

Parameters:

elements - - elements to add

Returns:

length of the list

removeLastOccurrenceAsync

RFuture<Boolean> removeLastOccurrenceAsync(Object o)

Removes last occurrence of element o

Parameters:

o - - element

Returns:

true if object has been removed otherwise false

removeLastAsync

RFuture<V> removeLastAsync()

Retrieves and removes the last element of deque. Returns null if there are no elements in deque.

Returns:

element

removeFirstAsync

RFuture<V> removeFirstAsync()

Retrieves and removes the first element of deque. Returns null if there are no elements in deque.

Returns:

element

removeFirstOccurrenceAsync

RFuture<Boolean> removeFirstOccurrenceAsync(Object o)

Removes first occurrence of element o

Parameters:

o - - element to remove

Returns:

true if object has been removed otherwise false

pushAsync

RFuture<Void> pushAsync(V e)

Adds element at the head of this deque.

Parameters:

e - - element to add

Returns:

void

popAsync

RFuture<V> popAsync()

Retrieves and removes element at the head of this deque. Returns null if there are no elements in deque.

Returns:

element

pollLastAsync

RFuture<V> pollLastAsync()

Retrieves and removes element at the tail of this deque. Returns null if there are no elements in deque.

Returns:

element

pollFirstAsync

RFuture<V> pollFirstAsync()

Retrieves and removes element at the head of this deque. Returns null if there are no elements in deque.

Returns:

element

peekLastAsync

RFuture<V> peekLastAsync()

Returns element at the tail of this deque or null if there are no elements in deque.

Returns:

element

peekFirstAsync

RFuture<V> peekFirstAsync()

Returns element at the head of this deque or null if there are no elements in deque.

Returns:

element

offerLastAsync

RFuture<Boolean> offerLastAsync(V e)

Adds element at the tail of this deque.

Parameters:

e - - element to add

Returns:

true if element was added to this deque otherwise false

getLastAsync

RFuture<V> getLastAsync()

Returns element at the tail of this deque or null if there are no elements in deque.

Returns:

element

addLastAsync

RFuture<Void> addLastAsync(V e)

Adds element at the tail of this deque.

Parameters:

e - - element to add

Returns:

void

addFirstAsync

RFuture<Void> addFirstAsync(V e)

Adds element at the head of this deque.

Parameters:

e - - element to add

Returns:

void

offerFirstAsync

RFuture<Boolean> offerFirstAsync(V e)

Adds element at the head of this deque.

Parameters:

e - - element to add

Returns:

true if element was added to this deque otherwise false

pollFirstAsync

RFuture<List<V>> pollFirstAsync(int limit)

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

Returns:

list of head elements

pollLastAsync

RFuture<List<V>> pollLastAsync(int limit)

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

Returns:

list of tail elements

moveAsync

RFuture<V> moveAsync(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