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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/**
* 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.client.handler;
import io.netty.channel.*;
import io.netty.util.AttributeKey;
import org.redisson.client.ChannelName;
import org.redisson.client.WriteRedisConnectionException;
import org.redisson.client.protocol.CommandData;
import org.redisson.client.protocol.QueueCommand;
import org.redisson.client.protocol.QueueCommandHolder;
import org.redisson.misc.LogHelper;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
/**
*
*
* @author Nikita Koksharov
*
*/
public class CommandsQueuePubSub extends ChannelDuplexHandler {
public static final AttributeKey CURRENT_COMMAND = AttributeKey.valueOf("promise");
private final Queue queue = new ConcurrentLinkedQueue<>();
private final ChannelFutureListener listener = future -> {
if (!future.isSuccess() && future.channel().isActive()) {
sendNextCommand(future.channel());
}
};
public void sendNextCommand(Channel channel) {
QueueCommandHolder holder = channel.attr(CommandsQueuePubSub.CURRENT_COMMAND).getAndSet(null);
if (holder != null) {
queue.poll();
} else {
QueueCommandHolder c = queue.peek();
if (c != null) {
QueueCommand data = c.getCommand();
List> pubSubOps = data.getPubSubOperations();
if (!pubSubOps.isEmpty()) {
queue.poll();
}
}
}
sendData(channel);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
while (true) {
QueueCommandHolder command = queue.poll();
if (command == null) {
break;
}
command.getChannelPromise().tryFailure(
new WriteRedisConnectionException("Channel has been closed! Can't write command: "
+ LogHelper.toString(command.getCommand()) + " to channel: " + ctx.channel()));
}
super.channelInactive(ctx);
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
if (msg instanceof QueueCommand) {
QueueCommand data = (QueueCommand) msg;
QueueCommandHolder holder = queue.peek();
if (holder != null && holder.getCommand() == data) {
super.write(ctx, msg, promise);
} else {
queue.add(new QueueCommandHolder(data, promise));
sendData(ctx.channel());
}
} else {
super.write(ctx, msg, promise);
}
}
private void sendData(Channel ch) {
QueueCommandHolder holder = queue.peek();
if (holder != null && holder.trySend()) {
QueueCommand data = holder.getCommand();
List> pubSubOps = data.getPubSubOperations();
if (!pubSubOps.isEmpty()) {
for (CommandData
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