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    • org.redisson.reactive.RedissonDequeReactive Maven / Gradle / Ivy

    /**
 * Copyright 2014 Nikita Koksharov, Nickolay Borbit
 *
 * 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.reactive;

import org.reactivestreams.Publisher;
import org.redisson.api.RDequeReactive;
import org.redisson.client.codec.Codec;
import org.redisson.client.protocol.RedisCommand;
import org.redisson.client.protocol.RedisCommand.ValueType;
import org.redisson.client.protocol.RedisCommands;
import org.redisson.client.protocol.convertor.VoidReplayConvertor;
import org.redisson.command.CommandReactiveExecutor;
import org.redisson.connection.decoder.ListFirstObjectDecoder;

/**
 * Distributed and concurrent implementation of {@link java.util.Queue}
 *
 * @author Nikita Koksharov
 *
 * @param  the type of elements held in this collection
 */
public class RedissonDequeReactive extends RedissonQueueReactive implements RDequeReactive {

    private static final RedisCommand RPUSH_VOID = new RedisCommand("RPUSH", new VoidReplayConvertor(), 2, ValueType.OBJECTS);
    private static final RedisCommand LRANGE_SINGLE = new RedisCommand("LRANGE", new ListFirstObjectDecoder());

    public RedissonDequeReactive(CommandReactiveExecutor commandExecutor, String name) {
        super(commandExecutor, name);
    }

    public RedissonDequeReactive(Codec codec, CommandReactiveExecutor commandExecutor, String name) {
        super(codec, commandExecutor, name);
    }

    @Override
    public Publisher addFirst(V e) {
        return commandExecutor.writeReactive(getName(), codec, RedisCommands.LPUSH_VOID, getName(), e);
    }

    @Override
    public Publisher addLast(V e) {
        return commandExecutor.writeReactive(getName(), codec, RPUSH_VOID, getName(), e);
    }

    @Override
    public Publisher getLast() {
        return commandExecutor.readReactive(getName(), codec, LRANGE_SINGLE, getName(), -1, -1);
    }

    @Override
    public Publisher offerFirst(V e) {
        return commandExecutor.writeReactive(getName(), codec, RedisCommands.LPUSH_BOOLEAN, getName(), e);
    }

    @Override
    public Publisher offerLast(V e) {
        return offer(e);
    }

    @Override
    public Publisher peekFirst() {
        return get(0);
    }

    @Override
    public Publisher peekLast() {
        return getLast();
    }

    @Override
    public Publisher pollFirst() {
        return poll();
    }

    @Override
    public Publisher pollLast() {
        return commandExecutor.writeReactive(getName(), codec, RedisCommands.RPOP, getName());
    }

    @Override
    public Publisher pop() {
        return poll();
    }

    @Override
    public Publisher push(V e) {
        return addFirst(e);
    }

    @Override
    public Publisher removeFirstOccurrence(Object o) {
        return remove(o, 1);
    }

    @Override
    public Publisher removeFirst() {
        return poll();
    }

    @Override
    public Publisher removeLast() {
        return commandExecutor.writeReactive(getName(), codec, RedisCommands.RPOP, getName());
    }

    @Override
    public Publisher removeLastOccurrence(Object o) {
        return remove(o, -1);
    }

}
    
    
    
    

    




    
    
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