org.redisson.api

Interface RPriorityQueue<V>

Type Parameters:

V - value type

All Superinterfaces:

Collection<V>, Iterable<V>, Queue<V>, RObject, RObjectAsync

All Known Subinterfaces:

RPriorityBlockingDeque<V>, RPriorityBlockingQueue<V>, RPriorityDeque<V>

All Known Implementing Classes:

RedissonPriorityBlockingDeque, RedissonPriorityBlockingQueue, RedissonPriorityDeque, RedissonPriorityQueue

public interface RPriorityQueue<V>
extends Queue<V>, RObject

Redis based priority queue.

Author:

Nikita Koksharov

Method Summary

Modifier and Type	Method and Description
Comparator<? super V>	comparator() Returns comparator used by this queue
V	pollLastAndOfferFirstTo(String queueName) Retrieves and removes last available tail element of this queue queue and adds it at the head of queueName.
List<V>	readAll() Returns all queue elements at once
boolean	trySetComparator(Comparator<? super V> comparator) Sets new comparator only if current set is empty

Methods inherited from interface java.util.Queue

add, element, offer, peek, poll, remove

Methods inherited from interface java.util.Collection

addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, parallelStream, remove, removeAll, removeIf, retainAll, size, spliterator, stream, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface org.redisson.api.RObject

addListener, copy, delete, dump, getCodec, 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, isExistsAsync, migrateAsync, moveAsync, removeListenerAsync, renameAsync, renamenxAsync, restoreAndReplaceAsync, restoreAndReplaceAsync, restoreAsync, restoreAsync, sizeInMemoryAsync, touchAsync, unlinkAsync

Method Detail

comparator

Comparator<? super V> comparator()

Returns comparator used by this queue

Returns:

comparator object

readAll

List<V> readAll()

Returns all queue elements at once

Returns:

elements

pollLastAndOfferFirstTo

V pollLastAndOfferFirstTo(String queueName)

Retrieves and removes last available tail element of this queue queue and adds it at the head of queueName.

Parameters:

queueName - - names of destination queue

Returns:

the tail of this queue, or null if the specified waiting time elapses before an element is available

trySetComparator

boolean trySetComparator(Comparator<? super V> comparator)

Sets new comparator only if current set is empty

Parameters:

comparator - for values

Returns:

true if new comparator setted false otherwise