org.redisson.api

Interface RBlockingQueueAsync<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>, RBlockingQueue<V>, RBoundedBlockingQueue<V>, RBoundedBlockingQueueAsync<V>

All Known Implementing Classes:

RedissonBlockingDeque, RedissonBlockingQueue, RedissonBoundedBlockingQueue

public interface RBlockingQueueAsync<V>
extends RQueueAsync<V>

BlockingQueue backed by Redis

Author:

Nikita Koksharov

Method Summary

Modifier and Type	Method and Description
RFuture<Integer>	drainToAsync(Collection<? super V> c) Removes all available elements from this queue and adds them to the given collection in async mode.
RFuture<Integer>	drainToAsync(Collection<? super V> c, int maxElements) Removes at most the given number of available elements from this queue and adds them to the given collection in async mode.
RFuture<V>	pollAsync(long timeout, TimeUnit unit) Retrieves and removes the head of this queue in async mode, waiting up to the specified wait time if necessary for an element to become available.
RFuture<V>	pollFromAnyAsync(long timeout, TimeUnit unit, String... queueNames) Retrieves and removes first available head element of any queue in async mode, waiting up to the specified wait time if necessary for an element to become available in any of defined queues including queue own.
RFuture<V>	pollLastAndOfferFirstToAsync(String queueName, long timeout, TimeUnit unit)
RFuture<Void>	putAsync(V e) Inserts the specified element into this queue in async mode, waiting if necessary for space to become available.
RFuture<V>	takeAsync() Retrieves and removes the head of this queue in async mode, waiting if necessary until an element becomes available.

Methods inherited from interface org.redisson.api.RQueueAsync

offerAsync, peekAsync, pollAsync, pollLastAndOfferFirstToAsync

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, expireAtAsync, expireAtAsync, remainTimeToLiveAsync

Methods inherited from interface org.redisson.api.RObjectAsync

deleteAsync, isExistsAsync, migrateAsync, moveAsync, renameAsync, renamenxAsync

Method Detail

pollFromAnyAsync

RFuture<V> pollFromAnyAsync(long timeout,
                            TimeUnit unit,
                            String... queueNames)

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

Parameters:

queueNames - - names of queue

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

unit - a TimeUnit determining how to interpret the timeout parameter

Returns:

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

drainToAsync

RFuture<Integer> drainToAsync(Collection<? super V> c,
                              int maxElements)

Removes at most the given number of available elements from this queue and adds them to the given collection in async mode. A failure encountered while attempting to add elements to collection c may result in elements being in neither, either or both collections when the associated exception is thrown. Attempts to drain a queue to itself result in IllegalArgumentException. Further, the behavior of this operation is undefined if the specified collection is modified while the operation is in progress.

Parameters:

c - the collection to transfer elements into

maxElements - the maximum number of elements to transfer

Returns:

the number of elements transferred

Throws:

UnsupportedOperationException - if addition of elements is not supported by the specified collection

ClassCastException - if the class of an element of this queue prevents it from being added to the specified collection

NullPointerException - if the specified collection is null

IllegalArgumentException - if the specified collection is this queue, or some property of an element of this queue prevents it from being added to the specified collection

drainToAsync

RFuture<Integer> drainToAsync(Collection<? super V> c)

Removes all available elements from this queue and adds them to the given collection in async mode. This operation may be more efficient than repeatedly polling this queue. A failure encountered while attempting to add elements to collection c may result in elements being in neither, either or both collections when the associated exception is thrown. Attempts to drain a queue to itself result in IllegalArgumentException. Further, the behavior of this operation is undefined if the specified collection is modified while the operation is in progress.

Parameters:

c - the collection to transfer elements into

Returns:

the number of elements transferred

Throws:

UnsupportedOperationException - if addition of elements is not supported by the specified collection

ClassCastException - if the class of an element of this queue prevents it from being added to the specified collection

NullPointerException - if the specified collection is null

IllegalArgumentException - if the specified collection is this queue, or some property of an element of this queue prevents it from being added to the specified collection

pollLastAndOfferFirstToAsync

RFuture<V> pollLastAndOfferFirstToAsync(String queueName,
                                        long timeout,
                                        TimeUnit unit)

pollAsync

RFuture<V> pollAsync(long timeout,
                     TimeUnit unit)

Retrieves and removes the head of this queue in async mode, waiting up to the specified wait time if necessary for an element to become available.

Parameters:

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

takeAsync

RFuture<V> takeAsync()

Retrieves and removes the head of this queue in async mode, waiting if necessary until an element becomes available.

Returns:

the head of this queue

putAsync

RFuture<Void> putAsync(V e)

Inserts the specified element into this queue in async mode, waiting if necessary for space to become available.

Parameters:

e - the element to add

Returns:

void

Throws:

ClassCastException - if the class of the specified element prevents it from being added to this queue

NullPointerException - if the specified element is null

IllegalArgumentException - if some property of the specified element prevents it from being added to this queue