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/**
* Copyright (c) 2013-2024 Nikita Koksharov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.redisson.api;
import java.time.Duration;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
/**
* Reactive interface for BlockingQueue object
*
* @author Nikita Koksharov
* @param the type of elements held in this collection
*/
public interface RBlockingQueueReactive extends RQueueReactive {
/**
* 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 own.
*
* @param queueNames - names of queue
* @param timeout how long to wait before giving up, in units of
* {@code unit}
* @param unit a {@code TimeUnit} determining how to interpret the
* {@code timeout} parameter
* @return Mono object with the head of this queue, or {@code null} if the
* specified waiting time elapses before an element is available
*/
Mono 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.
*
* @param queueNames queue names. Queue name itself is always included
* @param timeout how long to wait before giving up, in units of
* {@code unit}
* @return the head of this queue, or {@code null} if the
* specified waiting time elapses before an element is available
* @throws InterruptedException if interrupted while waiting
*/
Mono> pollFromAnyWithName(Duration timeout, 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.
*
*
* Requires Redis 7.0.0 and higher.
*
* @param duration how long to wait before giving up
* @param count elements amount
* @param queueNames name of queues
* @return the head elements
*/
Mono>> pollFirstFromAny(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.
*
* @param duration how long to wait before giving up
* @param count elements amount
* @param queueNames name of queues
* @return the tail elements
*/
Mono>> pollLastFromAny(Duration duration, int count, String... queueNames) throws InterruptedException;
/**
* 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 {@code 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
* {@code IllegalArgumentException}. Further, the behavior of
* this operation is undefined if the specified collection is
* modified while the operation is in progress.
*
* @param c the collection to transfer elements into
* @param maxElements the maximum number of elements to transfer
* @return the number of elements transferred
* @throws UnsupportedOperationException if addition of elements
* is not supported by the specified collection
* @throws ClassCastException if the class of an element of this queue
* prevents it from being added to the specified collection
* @throws NullPointerException if the specified collection is null
* @throws 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
*/
Mono drainTo(Collection c, int maxElements);
/**
* 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 {@code 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
* {@code IllegalArgumentException}. Further, the behavior of
* this operation is undefined if the specified collection is
* modified while the operation is in progress.
*
* @param c the collection to transfer elements into
* @return the number of elements transferred
* @throws UnsupportedOperationException if addition of elements
* is not supported by the specified collection
* @throws ClassCastException if the class of an element of this queue
* prevents it from being added to the specified collection
* @throws NullPointerException if the specified collection is null
* @throws 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
*/
Mono drainTo(Collection c);
/**
* 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.
*
* @param queueName - names of destination queue
* @param timeout how long to wait before giving up, in units of
* {@code unit}
* @param unit a {@code TimeUnit} determining how to interpret the
* {@code timeout} parameter
* @return the tail of this queue, or {@code null} if the
* specified waiting time elapses before an element is available
*/
Mono pollLastAndOfferFirstTo(String queueName, 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.
*
* @param timeout how long to wait before giving up, in units of
* {@code unit}
* @param unit a {@code TimeUnit} determining how to interpret the
* {@code timeout} parameter
* @return the head of this queue, or {@code null} if the
* specified waiting time elapses before an element is available
*/
Mono poll(long timeout, TimeUnit unit);
/**
* 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.
*
* @param queueName - names of destination queue
* @return the tail of this queue, or {@code null} if the
* specified waiting time elapses before an element is available
*/
Mono takeLastAndOfferFirstTo(String queueName);
/**
* Retrieves and removes the head of this queue in async mode, waiting if necessary
* until an element becomes available.
*
* @return the head of this queue
*/
Mono take();
/**
* Inserts the specified element into this queue in async mode, waiting if necessary
* for space to become available.
*
* @param e the element to add
* @throws ClassCastException if the class of the specified element
* prevents it from being added to this queue
* @throws NullPointerException if the specified element is null
* @throws IllegalArgumentException if some property of the specified
* element prevents it from being added to this queue
* @return void
*/
Mono put(V e);
/**
* Retrieves and removes continues stream of elements from the head of this queue.
* Waits for next element become available.
*
* @return stream of elements
*/
Flux takeElements();
}