基于netty的聊天室

基于netty的聊天室

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  • RPC

概述

  • chat_netty3 基于netty3

  • chat_netty4 基于netty4

  • chat_protobuf 序列化协议 使用protobuf

    1. https://github.com/csy512889371/learndemo/tree/master/netty/chat_netty3

    2. https://github.com/csy512889371/learndemo/tree/master/netty/chat_netty4

    3. https://github.com/csy512889371/learndemo/tree/master/netty/chat_protobuf

部分代码

netty4 部分代码

package com.cn.common.core.session;
/**
 * 会话抽象接口
 *
 *
 */
public interface Session {

	/**
	 * 会话绑定对象
	 * @return
	 */
	Object getAttachment();

	/**
	 * 绑定对象
	 * @return
	 */
	void setAttachment(Object attachment);

	/**
	 * 移除绑定对象
	 * @return
	 */
	void removeAttachment();

	/**
	 * 向会话中写入消息
	 * @param message
	 */
	void write(Object message);

	/**
	 * 判断会话是否在连接中
	 * @return
	 */
	boolean isConnected();

	/**
	 * 关闭
	 * @return
	 */
	void close();
}

SessionImpl

package com.cn.common.core.session;

import io.netty.channel.Channel;
import io.netty.util.AttributeKey;

/**
 * 会话封装类
 *
 *
 */
public class SessionImpl implements Session {

	/**
	 * 绑定对象key
	 */
	public static AttributeKey ATTACHMENT_KEY  = AttributeKey.valueOf("ATTACHMENT_KEY");

	/**
	 * 实际会话对象
	 */
	private Channel channel;


	public SessionImpl(Channel channel) {
		this.channel = channel;
	}

	@Override
	public Object getAttachment() {
		return channel.attr(ATTACHMENT_KEY).get();
	}

	@Override
	public void setAttachment(Object attachment) {
		channel.attr(ATTACHMENT_KEY).set(attachment);
	}

	@Override
	public void removeAttachment() {
		channel.attr(ATTACHMENT_KEY).remove();
	}

	@Override
	public void write(Object message) {
		channel.writeAndFlush(message);
	}

	@Override
	public boolean isConnected() {
		return channel.isActive();
	}

	@Override
	public void close() {
		channel.close();
	}



} 
     
    

SessionManager

package com.cn.common.core.session;

import java.util.Collections;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import com.cn.common.core.model.Response;
import com.cn.common.core.serial.Serializer;
import com.cn.common.core.session.Session;
import com.google.protobuf.GeneratedMessage;
/**
 * 会话管理者
 *
 *
 */
public class SessionManager {

	/**
	 * 在线会话
	 */
	private static final ConcurrentHashMap onlineSessions = new ConcurrentHashMap<>();

	/**
	 * 加入
	 * @param playerId
	 * @param channel
	 * @return
	 */
	public static boolean putSession(long playerId, Session session){
		if(!onlineSessions.containsKey(playerId)){
			boolean success = onlineSessions.putIfAbsent(playerId, session)== null? true : false;
			return success;
		}
		return false;
	}

	/**
	 * 移除
	 * @param playerId
	 */
	public static Session removeSession(long playerId){
		return onlineSessions.remove(playerId);
	}

	/**
	 * 发送消息[自定义协议]
	 * @param 
	 * @param playerId
	 * @param message
	 */
	public static  void sendMessage(long playerId, short module, short cmd, T message){
		Session session = onlineSessions.get(playerId);
		if (session != null && session.isConnected()) {
			Response response = new Response(module, cmd, message.getBytes());
			session.write(response);
		}
	}

	/**
	 * 发送消息[protoBuf协议]
	 * @param 
	 * @param playerId
	 * @param message
	 */
	public static  void sendMessage(long playerId, short module, short cmd, T message){
		Session session = onlineSessions.get(playerId);
		if (session != null && session.isConnected()) {
			Response response = new Response(module, cmd, message.toByteArray());
			session.write(response);
		}
	}

	/**
	 * 是否在线
	 * @param playerId
	 * @return
	 */
	public static boolean isOnlinePlayer(long playerId){
		return onlineSessions.containsKey(playerId);
	}

	/**
	 * 获取所有在线玩家
	 * @return
	 */
	public static Set getOnlinePlayers() {
		return Collections.unmodifiableSet(onlineSessions.keySet());
	}
}

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