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• RedissonPriorityBlockingDeque.java

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/**
 * Copyright (c) 2013-2021 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;

import org.redisson.api.RFuture;
import org.redisson.api.RPriorityBlockingDeque;
import org.redisson.api.RedissonClient;
import org.redisson.api.queue.DequeMoveArgs;
import org.redisson.client.codec.Codec;
import org.redisson.client.protocol.RedisCommands;
import org.redisson.command.CommandAsyncExecutor;
import org.redisson.misc.RPromise;
import org.redisson.misc.RedissonPromise;

import java.time.Duration;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;

/**
 * 
Distributed and concurrent implementation of priority blocking deque.
 *
 * 
Queue size limited by Redis server memory amount. This is why {@link #remainingCapacity()} always
 * returns Integer.MAX_VALUE
 *
 * @author Nikita Koksharov
 */
public class RedissonPriorityBlockingDeque extends RedissonPriorityDeque implements RPriorityBlockingDeque {

    private final RedissonPriorityBlockingQueue blockingQueue;
    
    protected RedissonPriorityBlockingDeque(CommandAsyncExecutor commandExecutor, String name, RedissonClient redisson) {
        super(commandExecutor, name, redisson);
        blockingQueue = (RedissonPriorityBlockingQueue) redisson.getPriorityBlockingQueue(name);
    }

    protected RedissonPriorityBlockingDeque(Codec codec, CommandAsyncExecutor commandExecutor, String name, RedissonClient redisson) {
        super(codec, commandExecutor, name, redisson);
        
        blockingQueue = (RedissonPriorityBlockingQueue) redisson.getPriorityBlockingQueue(name, codec);
    }

    @Override
    public void put(V e) throws InterruptedException {
        add(e);
    }

    @Override
    public boolean offer(V e, long timeout, TimeUnit unit) throws InterruptedException {
        return offer(e);
    }

    @Override
    public RFuture takeAsync() {
        return blockingQueue.takeAsync();
    }

    @Override
    public V take() throws InterruptedException {
        return blockingQueue.take();
    }

    public RFuture pollAsync(long timeout, TimeUnit unit) {
        return blockingQueue.pollAsync(timeout, unit);
    }

    @Override
    public V poll(long timeout, TimeUnit unit) throws InterruptedException {
        return blockingQueue.poll(timeout, unit);
    }

    @Override
    public V pollFromAny(long timeout, TimeUnit unit, String... queueNames) throws InterruptedException {
        throw new UnsupportedOperationException("use poll method");
    }

    @Override
    public RFuture pollLastAndOfferFirstToAsync(String queueName, long timeout, TimeUnit unit) {
        return blockingQueue.pollLastAndOfferFirstToAsync(queueName, timeout, unit);
    }

    @Override
    public V pollLastAndOfferFirstTo(String queueName, long timeout, TimeUnit unit) throws InterruptedException {
        return blockingQueue.pollLastAndOfferFirstTo(queueName, timeout, unit);
    }
    
    @Override
    public V takeLastAndOfferFirstTo(String queueName) throws InterruptedException {
        return commandExecutor.getInterrupted(takeLastAndOfferFirstToAsync(queueName));
    }

    @Override
    public int subscribeOnElements(Consumer consumer) {
        return commandExecutor.getConnectionManager().getElementsSubscribeService().subscribeOnElements(this::takeAsync, consumer);
    }

    @Override
    public void unsubscribe(int listenerId) {
        commandExecutor.getConnectionManager().getElementsSubscribeService().unsubscribe(listenerId);
    }

    public RFuture takeLastAndOfferFirstToAsync(String queueName) {
        return pollLastAndOfferFirstToAsync(queueName, 0, TimeUnit.SECONDS);
    }

    @Override
    public int remainingCapacity() {
        return Integer.MAX_VALUE;
    }

    @Override
    public int drainTo(Collection c) {
        return blockingQueue.drainTo(c);
    }

    public RFuture drainToAsync(Collection c) {
        return blockingQueue.drainToAsync(c);
    }

    @Override
    public int drainTo(Collection c, int maxElements) {
        return blockingQueue.drainTo(c, maxElements);
    }

    public RFuture drainToAsync(Collection c, int maxElements) {
        return blockingQueue.drainToAsync(c, maxElements);
    }

    @Override
    public RFuture offerAsync(V e) {
        throw new UnsupportedOperationException("use offer method");
    }

    @Override
    public RFuture> pollAsync(int limit) {
        return null;
    }

    @Override
    public RFuture pollFromAnyAsync(long timeout, TimeUnit unit, String... queueNames) {
        throw new UnsupportedOperationException("use poll method");
    }

    @Override
    public RFuture putAsync(V e) {
        throw new UnsupportedOperationException("use add method");
    }
    
    @Override
    public RFuture putFirstAsync(V e) {
        return addFirstAsync(e);
    }

    @Override
    public RFuture putLastAsync(V e) {
        return addLastAsync(e);
    }

    @Override
    public void putFirst(V e) throws InterruptedException {
        addFirst(e);
    }

    @Override
    public void putLast(V e) throws InterruptedException {
        addLast(e);
    }

    @Override
    public boolean offerFirst(V e, long timeout, TimeUnit unit) throws InterruptedException {
        addFirst(e);
        return true;
    }

    @Override
    public boolean offerLast(V e, long timeout, TimeUnit unit) throws InterruptedException {
        addLast(e);
        return true;
    }

    @Override
    public V takeFirst() throws InterruptedException {
        return commandExecutor.getInterrupted(takeFirstAsync());
    }

    @Override
    public RFuture takeFirstAsync() {
        return takeAsync();
    }

    @Override
    public RFuture takeLastAsync() {
        RPromise result = new RedissonPromise();
        blockingQueue.takeAsync(result, 0, 0, RedisCommands.RPOP, getRawName());
        return result;
    }

    @Override
    public V takeLast() throws InterruptedException {
        return commandExecutor.getInterrupted(takeLastAsync());
    }

    @Override
    public RFuture pollFirstAsync(long timeout, TimeUnit unit) {
        return pollAsync(timeout, unit);
    }

    @Override
    public V pollFirstFromAny(long timeout, TimeUnit unit, String... queueNames) throws InterruptedException {
        return commandExecutor.getInterrupted(pollFirstFromAnyAsync(timeout, unit, queueNames));
    }

    @Override
    public RFuture pollFirstFromAnyAsync(long timeout, TimeUnit unit, String... queueNames) {
        return pollFromAnyAsync(timeout, unit, queueNames);
    }

    @Override
    public V pollLastFromAny(long timeout, TimeUnit unit, String... queueNames) throws InterruptedException {
        return commandExecutor.getInterrupted(pollLastFromAnyAsync(timeout, unit, queueNames));
    }

    @Override
    public int subscribeOnFirstElements(Consumer consumer) {
        return commandExecutor.getConnectionManager().getElementsSubscribeService().subscribeOnElements(this::takeFirstAsync, consumer);
    }

    @Override
    public int subscribeOnLastElements(Consumer consumer) {
        return commandExecutor.getConnectionManager().getElementsSubscribeService().subscribeOnElements(this::takeLastAsync, consumer);
    }

    @Override
    public RFuture pollLastFromAnyAsync(long timeout, TimeUnit unit, String... queueNames) {
        throw new UnsupportedOperationException();
    }

    @Override
    public V pollFirst(long timeout, TimeUnit unit) throws InterruptedException {
        return commandExecutor.getInterrupted(pollFirstAsync(timeout, unit));
    }

    @Override
    public RFuture pollLastAsync(long timeout, TimeUnit unit) {
        RPromise result = new RedissonPromise();
        blockingQueue.takeAsync(result, 0, unit.toMicros(timeout), RedisCommands.RPOP, getRawName());
        return result;
    }

    @Override
    public V pollLast(long timeout, TimeUnit unit) throws InterruptedException {
        return commandExecutor.getInterrupted(pollLastAsync(timeout, unit));
    }

    @Override
    public List poll(int limit) {
        throw new UnsupportedOperationException();
    }

    @Override
    public List pollLast(int limit) {
        throw new UnsupportedOperationException();
    }

    @Override
    public List pollFirst(int limit) {
        throw new UnsupportedOperationException();
    }

    @Override
    public RFuture> pollFirstAsync(int limit) {
        throw new UnsupportedOperationException();
    }

    @Override
    public RFuture> pollLastAsync(int limit) {
        throw new UnsupportedOperationException();
    }

    @Override
    public V move(Duration timeout, DequeMoveArgs args) {
        throw new UnsupportedOperationException();
    }

    @Override
    public RFuture moveAsync(Duration timeout, DequeMoveArgs args) {
        throw new UnsupportedOperationException();
    }
}