org.kordamp.javatrove.chat04.server.impl.ServerChatHandlerImpl.java Source code

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Here is the source code for org.kordamp.javatrove.chat04.server.impl.ServerChatHandlerImpl.java

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/*
 * Copyright 2016-2017 Andres Almiray
 *
 * This file is part of Java Trove Examples
 *
 * Java Trove Examples is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Java Trove Examples is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Java Trove Examples. If not, see <http://www.gnu.org/licenses/>.
 */
package org.kordamp.javatrove.chat04.server.impl;

import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.ReferenceCountUtil;
import org.kordamp.javatrove.chat04.ChatHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 * @author Andres Almiray
 */
public class ServerChatHandlerImpl extends ChannelInboundHandlerAdapter implements ChatHandler {
    private static final Logger LOG = LoggerFactory.getLogger(ServerChatHandlerImpl.class);

    private final List<Channel> channels = new CopyOnWriteArrayList<>();

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        try {
            LOG.info("Publishing " + msg);
            channels.forEach(channel -> channel.writeAndFlush(msg));
        } finally {
            ReferenceCountUtil.release(msg);
        }
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        Channel channel = ctx.channel();
        LOG.info("Adding channel " + channel.id());
        channels.add(channel);
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        Channel channel = ctx.channel();
        LOG.info("Removing channel " + channel.id());
        channels.remove(channel);
    }
}