Package org.redisson.api

Interface RBlockingQueue<V>

Type Parameters:

V - the type of elements held in this collection

All Superinterfaces:

BlockingQueue<V>, Collection<V>, Iterable<V>, Queue<V>, RBlockingQueueAsync<V>, RCollectionAsync<V>, RExpirable, RExpirableAsync, RObject, RObjectAsync, RQueue<V>, RQueueAsync<V>

All Known Subinterfaces:

RBlockingDeque<V>, RBoundedBlockingQueue<V>, RPriorityBlockingDeque<V>, RPriorityBlockingQueue<V>, RTransferQueue<V>

All Known Implementing Classes:

RedissonBlockingDeque, RedissonBlockingQueue, RedissonBoundedBlockingQueue, RedissonPriorityBlockingDeque, RedissonPriorityBlockingQueue, RedissonTransferQueue

public interface RBlockingQueue<V>
extends BlockingQueue<V>, RQueue<V>, RBlockingQueueAsync<V>

Distributed implementation of BlockingQueue

Author:

Nikita Koksharov

Method Summary

Modifier and Type	Method	Description
Map<String,List<V>>	pollFirstFromAny(Duration duration, int count, String... queueNames)	Retrieves and removes first available head elements of any queue, waiting up to the specified wait time if necessary for an element to become available in any of defined queues including queue itself.
V	pollFromAny(long timeout, TimeUnit unit, String... queueNames)	Retrieves and removes first available head element of any queue, waiting up to the specified wait time if necessary for an element to become available in any of defined queues including queue itself.
V	pollLastAndOfferFirstTo(String queueName, long timeout, TimeUnit unit)	Retrieves and removes last available tail element of this queue and adds it at the head of queueName, waiting up to the specified wait time if necessary for an element to become available.
Map<String,List<V>>	pollLastFromAny(Duration duration, int count, String... queueNames)	Retrieves and removes first available tail elements of any queue, waiting up to the specified wait time if necessary for an element to become available in any of defined queues including queue itself.
int	subscribeOnElements(Consumer<V> consumer)	Subscribes on elements appeared in this queue.
V	takeLastAndOfferFirstTo(String queueName)	Retrieves and removes last available tail element of any queue and adds it at the head of queueName, waiting if necessary for an element to become available in any of defined queues including queue itself.
void	unsubscribe(int listenerId)	Un-subscribes defined listener.

Methods inherited from interface java.util.concurrent.BlockingQueue

add, contains, drainTo, drainTo, offer, offer, poll, put, remainingCapacity, remove, take

Methods inherited from interface java.util.Collection

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

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Queue

element, peek, poll, remove

Methods inherited from interface org.redisson.api.RBlockingQueueAsync

drainToAsync, drainToAsync, pollAsync, pollFirstFromAnyAsync, pollFromAnyAsync, pollLastAndOfferFirstToAsync, pollLastFromAnyAsync, putAsync, takeAsync, takeLastAndOfferFirstToAsync

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

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

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

Methods inherited from interface org.redisson.api.RQueue

addListener, poll, pollLastAndOfferFirstTo, readAll

Methods inherited from interface org.redisson.api.RQueueAsync

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

Method Details

pollFromAny

V pollFromAny(long timeout,
 TimeUnit unit,
 String... queueNames)
       throws InterruptedException

Retrieves and removes first available head element of any queue, waiting up to the specified wait time if necessary for an element to become available in any of defined queues including queue itself.

Parameters:

queueNames - - queue names. Queue name itself is always included

timeout - how long to wait before giving up, in units of unit

unit - a TimeUnit determining how to interpret the timeout parameter

Returns:

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

Throws:

InterruptedException - if interrupted while waiting

pollFirstFromAny

Map<String,List<V>> pollFirstFromAny(Duration duration,
 int count,
 String... queueNames)
                              throws InterruptedException

Retrieves and removes first available head elements of any queue, waiting up to the specified wait time if necessary for an element to become available in any of defined queues including queue itself.

Requires Redis 7.0.0 and higher.

Parameters:

duration - how long to wait before giving up

count - elements amount

queueNames - name of queues

Returns:

the head elements

Throws:

InterruptedException

pollLastFromAny

Map<String,List<V>> pollLastFromAny(Duration duration,
 int count,
 String... queueNames)
                             throws InterruptedException

Retrieves and removes first available tail elements of any queue, waiting up to the specified wait time if necessary for an element to become available in any of defined queues including queue itself.

Requires Redis 7.0.0 and higher.

Parameters:

duration - how long to wait before giving up

count - elements amount

queueNames - name of queues

Returns:

the tail elements

Throws:

InterruptedException

pollLastAndOfferFirstTo

V pollLastAndOfferFirstTo(String queueName,
 long timeout,
 TimeUnit unit)
                   throws InterruptedException

Retrieves and removes last available tail element of this queue and adds it at the head of queueName, waiting up to the specified wait time if necessary for an element to become available.

Parameters:

queueName - - names of destination queue

timeout - how long to wait before giving up, in units of unit

unit - a TimeUnit determining how to interpret the timeout parameter

Returns:

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

Throws:

InterruptedException - if interrupted while waiting

takeLastAndOfferFirstTo

V takeLastAndOfferFirstTo(String queueName)
                   throws InterruptedException

Retrieves and removes last available tail element of any queue and adds it at the head of queueName, waiting if necessary for an element to become available in any of defined queues including queue itself.

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

Throws:

InterruptedException - if interrupted while waiting

subscribeOnElements

int subscribeOnElements(Consumer<V> consumer)

Subscribes on elements appeared in this queue. Continuously invokes RBlockingQueueAsync.takeAsync() method to get a new element.

Parameters:

consumer - - queue elements listener

Returns:

listenerId - id of listener

unsubscribe

void unsubscribe(int listenerId)

Un-subscribes defined listener.

Parameters:

listenerId - - id of listener