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com.github.lontime.shaded.org.redisson.RedissonPriorityDeque Maven / Gradle / Ivy
/**
* 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 com.github.lontime.shaded.org.redisson;
import com.github.lontime.shaded.org.redisson.api.RFuture;
import com.github.lontime.shaded.org.redisson.api.RPriorityDeque;
import com.github.lontime.shaded.org.redisson.api.RedissonClient;
import com.github.lontime.shaded.org.redisson.api.queue.DequeMoveArgs;
import com.github.lontime.shaded.org.redisson.client.codec.Codec;
import com.github.lontime.shaded.org.redisson.client.protocol.RedisCommand;
import com.github.lontime.shaded.org.redisson.client.protocol.RedisCommands;
import com.github.lontime.shaded.org.redisson.client.protocol.decoder.ListFirstObjectDecoder;
import com.github.lontime.shaded.org.redisson.command.CommandAsyncExecutor;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.stream.Stream;
/**
* Distributed and concurrent implementation of {@link java.util.Queue}
*
* @author Nikita Koksharov
*
* @param the type of elements held in this collection
*/
public class RedissonPriorityDeque extends RedissonPriorityQueue implements RPriorityDeque {
private static final RedisCommand LRANGE_SINGLE = new RedisCommand("LRANGE", new ListFirstObjectDecoder());
protected RedissonPriorityDeque(CommandAsyncExecutor commandExecutor, String name, RedissonClient redisson) {
super(commandExecutor, name, redisson);
}
public RedissonPriorityDeque(Codec codec, CommandAsyncExecutor commandExecutor, String name, RedissonClient redisson) {
super(codec, commandExecutor, name, redisson);
}
@Override
public int addFirstIfExists(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public int addLastIfExists(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public int addFirst(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public int addLast(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture addFirstAsync(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture addLastAsync(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture addFirstIfExistsAsync(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture addLastIfExistsAsync(V... elements) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture addFirstAsync(V e) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture addLastAsync(V e) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public void addFirst(V e) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public void addLast(V e) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public Iterator descendingIterator() {
return new Iterator() {
private int currentIndex = size();
private boolean removeExecuted;
@Override
public boolean hasNext() {
int size = size();
return currentIndex > 0 && size > 0;
}
@Override
public V next() {
if (!hasNext()) {
throw new NoSuchElementException("No such element at index " + currentIndex);
}
currentIndex--;
removeExecuted = false;
return RedissonPriorityDeque.this.get(currentIndex);
}
@Override
public void remove() {
if (removeExecuted) {
throw new IllegalStateException("Element been already deleted");
}
RedissonPriorityDeque.this.remove(currentIndex);
currentIndex++;
removeExecuted = true;
}
};
}
@Override
public RFuture getLastAsync() {
return commandExecutor.readAsync(getRawName(), codec, LRANGE_SINGLE, getRawName(), -1, -1);
}
@Override
public V getLast() {
V result = get(getLastAsync());
if (result == null) {
throw new NoSuchElementException();
}
return result;
}
@Override
public boolean offerFirst(V e) {
throw new UnsupportedOperationException("use add or put method");
}
public RFuture offerFirstAsync(V e) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public boolean offerLast(V e) {
throw new UnsupportedOperationException("use add or put method");
}
public RFuture offerLastAsync(V e) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture peekFirstAsync() {
return getAsync(0);
}
@Override
public V peekFirst() {
return get(peekFirstAsync());
}
@Override
public V peekLast() {
return get(peekLastAsync());
}
public RFuture peekLastAsync() {
return getLastAsync();
}
@Override
public V pollFirst() {
return get(pollFirstAsync());
}
public RFuture pollFirstAsync() {
return pollAsync();
}
public RFuture pollLastAsync() {
return wrapLockedAsync(RedisCommands.RPOP, getRawName());
}
@Override
public V pollLast() {
return get(pollLastAsync());
}
@Override
public RFuture popAsync() {
return pollAsync();
}
@Override
public V pop() {
return removeFirst();
}
@Override
public void push(V e) {
throw new UnsupportedOperationException("use add or put method");
}
public RFuture pushAsync(V e) {
throw new UnsupportedOperationException("use add or put method");
}
@Override
public RFuture removeAsync(Object o, int count) {
return wrapLockedAsync(() -> {
return super.removeAsync(o, count);
});
}
@Override
public RFuture removeFirstOccurrenceAsync(Object o) {
return removeAsync(o, 1);
}
@Override
public boolean removeFirstOccurrence(Object o) {
return remove(o, 1);
}
@Override
public RFuture removeFirstAsync() {
return pollAsync();
}
@Override
public RFuture removeLastAsync() {
return pollLastAsync();
}
@Override
public V removeLast() {
V value = get(removeLastAsync());
if (value == null) {
throw new NoSuchElementException();
}
return value;
}
@Override
public RFuture removeLastOccurrenceAsync(Object o) {
return removeAsync(o, -1);
}
@Override
public boolean removeLastOccurrence(Object o) {
return remove(o, -1);
}
@Override
public Stream descendingStream() {
return toStream(descendingIterator());
}
@Override
public RFuture> pollFirstAsync(int limit) {
return pollAsync(limit);
}
@Override
public List pollFirst(int limit) {
return poll(limit);
}
@Override
public List pollLast(int limit) {
return get(pollLastAsync(limit));
}
@Override
public RFuture> pollLastAsync(int limit) {
return wrapLockedAsync(() -> {
return commandExecutor.evalWriteNoRetryAsync(getRawName(), codec, RedisCommands.EVAL_LIST,
"local result = {};"
+ "for i = 1, ARGV[1], 1 do " +
"local value = redis.call('rpop', KEYS[1]);" +
"if value ~= false then " +
"table.insert(result, value);" +
"else " +
"return result;" +
"end;" +
"end; " +
"return result;",
Collections.singletonList(getRawName()), limit);
});
}
@Override
public V move(DequeMoveArgs args) {
throw new UnsupportedOperationException();
}
@Override
public RFuture moveAsync(DequeMoveArgs args) {
throw new UnsupportedOperationException();
}
}
