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mina.net 梳理

时间:2017-04-29 23:25:45      阅读:346      评论:0      收藏:0      [点我收藏+]

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LZ最近离职,闲着也是闲着,打算梳理下

公司做的是电商,CTO打算把2.0系统用java 语言开发,LZ目前不打算做java,所以 选择离职。离职前,在公司负责的最后一个项目 供应链系统。

系统分为 3套子系统:

1 供应链工作平台(即用户操作平台):采用CS架构,Sqlite做缓存。

2 消息中心: 后台程序,采用mina.net,scoket 长连接 保证服务消息的 推送,后台消息的提醒,和 系统对最新订单的缓存。

3 WindowsService 监控消息中心,保证消息中心 随系统的开启而启动

mina 简介:

Apache Mina Server 是一个网络通信应用框架,它主要是对基于TCP/IP、UDP/IP协议栈的通信框架,Mina 可以帮助我们快速开发高性能、高扩展性的网络通信应用,Mina 提供了事件驱动、异步(Mina 的异步IO 默认使用的是Java NIO 作为底层支持)操作的编程模型。

mina.net 是Apache Mina Server 的.net 版本 主要用于系统的长连接通信

安装:

PM> Install-Package Mina

mina.net 主要对象:

1.AsyncSocketConnector: 发起链接

2.IoSession:mina 链接创建成功之后 客户端,服务的的数据传送

3.IoHandlerAdapter:适配器类。可以扩展

4.DemuxingProtocolCodecFactory:构建协议编码工厂

适配器主要方法:

1 MessageReceived:收到消息时触发

2.MessageSent 发送消息后触发

3.SessionClosed 关闭Session时 触发

4.SessionCreated 创建Session时 触发

5.ExceptionCaught 发生异常时 触发

6.SessionIdleSession 空闲时 触发

实现思路:

创建mina链接:

public void StartProcess(LoginContext config)
        { 
AsyncSocketConnector connector = new Mina.Transport.Socket.AsyncSocketConnector();
//注册协议编解码器工厂
 connector.FilterChain.AddLast("encoding", new ProtocolCodecFilter(new MyMinaCodecFactory()));
//指定服务端IP 和端口号
            connector.DefaultRemoteEndPoint = new IPEndPoint(IPAddress.Parse(MinaConfig.Ip), MinaConfig.Port);
//初始化 消息处理类
            var headerDic = CreateHeader();
//继承IoHandlerAdapter构建适配器
            MinaMessageHandler headler = new MinaMessageHandler(config, connector, headerDic);

            connector.Handler = headler;

            while (true)
            {
                try
                {
                    //ClientHandler
                    //建立链接
                    session = connector.Connect().Await().Session;
                    break;
                }
                catch (Exception ex)
                {
                    _Log.Error(ex.Message, ex);
                    Thread.Sleep(1000);
                }

            }
}

  链接建立成功之后,触发mina.net 内部机制的SessionCreated 方法,登录用户

public override void SessionCreated(Mina.Core.Session.IoSession session)
        {
            try
            {
                MyBaseMessage message = new LoginRequestMessage(ClientConfig.ClientAddr,ClientConfig.SharedSecret);
                (message as LoginRequestMessage).SetAutherString();
                session.Write(message);
            }
            catch (Exception ex)
            {
                _Log.Error(ex.Message, ex);
            }
            finally
            {
                base.SessionCreated(session);
            }
        }

  重写MessageReceived方法,收到服务器消息之后,处理相应事件

  /// <summary>
        /// 收到消息时 触发--处理消息,给服务器发送处理结果
        /// </summary>
        /// <param name="session"></param>
        /// <param name="message"></param>
        public override void MessageReceived(Mina.Core.Session.IoSession session, object message)
        {
            try
            {
                if (message is MyBaseMessage)
                {
                    var m = message as MyBaseMessage;

                    if (HeaderDic.Keys.Any(p=>p==m.GetCommandType()))
                    {
                        var messageHeader = HeaderDic[m.GetCommandType()];

                        messageHeader.Handle(session,m);
                    }
                    
                }
            }
            catch (Exception ex)
            {
                _Log.Error(ex.Message, ex);
            }
            finally
            {
                base.MessageReceived(session, message);
            }
            
        }

  重写 SessionClosed 事件,关闭session时,通知服务器,客户端已关闭链接

 /// <summary>
        /// 关闭Session时 触发-发送关闭消息
        /// </summary>
        /// <param name="session"></param>
        public override void SessionClosed(Mina.Core.Session.IoSession session)
        {
            try
            {
                while (true)
                {
                    try
                    {
                        if (Connector != null)
                        {
                            if (!Connector.Disposed)
                            {
                                session = Connector.Connect().Await().Session;

                                break;
                            }
                            else
                            {
                                break;
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        Thread.Sleep(1000);
                    }
                }
            }
            catch (Exception ex)
            {
                _Log.Error(ex.Message, ex);
            }
            finally
            {
                base.SessionClosed(session);
            }
        }

  重写 ExceptionCaught 方法,发生异常时,关闭链接

/// <summary>
        /// 发生异常时 触发,关闭session 重新登录
        /// </summary>
        /// <param name="session"></param>
        /// <param name="cause"></param>
        public override void ExceptionCaught(Mina.Core.Session.IoSession session, Exception cause)
        {
            try
            {
                session.Close(true);
                _Log.Error(cause.Message, cause);
            }
            catch (Exception ex)
            {
                _Log.Error(ex.Message, ex);
            }
            finally
            {
                base.ExceptionCaught(session, cause);
            }
        }

  重写 SessionIdle 方法,session空闲时,测试心跳

 /// <summary>
        /// Session 空闲时 发生
        /// </summary>
        /// <param name="session"></param>
        /// <param name="status"></param>
        public override void SessionIdle(Mina.Core.Session.IoSession session, Mina.Core.Session.IdleStatus status)
        {
            try
            {
                MyBaseMessage message = new DetectionMessage();

                session.Write(message);
            }
            catch (Exception ex)
            {
                _Log.Error(ex.Message, ex);
            }
            finally
            {
                base.SessionIdle(session, status);
            }
        }

  构建协议编解码器工厂

 public class MyMinaCodecFactory : DemuxingProtocolCodecFactory
    {
        public MyMinaCodecFactory()
        {
            AddMessageEncoder(new MyMinaEncoder());
            AddMessageDecoder(new MyMinaDecoder());
        }
    }

  编码器工厂,将对象 序列号成 bytes 数据

 public class MyMinaEncoder : IMessageEncoder<MyBaseMessage>
    {

        public void Encode(IoSession session, MyBaseMessage message, IProtocolEncoderOutput output)
        {
            IoBuffer buf = IoBuffer.Allocate(12);
            buf.AutoExpand = true;

            var messageBytes = message.EncodeMessage();

            buf.Put(messageBytes);
            buf.Flip();

            session.Write(buf);

        }

        public void Encode(IoSession session, object message, IProtocolEncoderOutput output)
        {
            IoBuffer buf = IoBuffer.Allocate(12);
            buf.AutoExpand = true;

            if (message is MyBaseMessage)
            {
                var m = message as MyBaseMessage;

                var messageBytes = m.EncodeMessage();

                buf.Put(messageBytes);
                buf.Flip();

            }
           
            session.Write(buf);

        }
    }

  解码器工厂,将字节转换为对象

 public class MyMinaDecoder : IMessageDecoder
    {
        public ILog _Log = LogManager.GetLogger("MessageHandler");

        public MessageDecoderResult Decodable(IoSession session,IoBuffer input)
        {
            try
            {
                if (input.Remaining < CommandConfig.messageHeaderLength)
                {
                    return MessageDecoderResult.NeedData;
                }
                var headerBytes = new byte[CommandConfig.messageHeaderLength];
                for (int i = 0; i < CommandConfig.messageHeaderLength; i++)
                {
                    headerBytes[i] = input.Get(i);
                }

                var lengthBytes = new byte[4];
                var commandIdBytes = new byte[4];
                var sequenceBytes = new byte[4];

                Array.Copy(headerBytes, 0, lengthBytes, 0, 4);
                Array.Copy(headerBytes, 4, commandIdBytes, 0, 4);
                Array.Copy(headerBytes, 8, sequenceBytes, 0, 4);


                var messageLength = lengthBytes.ByteToUint();//Convert.ToInt32(Encoding.Default.GetString(headerBytes, 0, 4));

                var messageCommand = commandIdBytes.ByteToUint();//(uint)Convert.ToInt32(Encoding.Default.GetString(headerBytes, 4, 4));

                if (messageCommand==CommandConfig.connect
                    || messageCommand == CommandConfig.connectResp
                    || messageCommand == CommandConfig.terminate
                    || messageCommand == CommandConfig.terminateResp
                    || messageCommand == CommandConfig.notify
                    || messageCommand == CommandConfig.notifyResp
                    || messageCommand == CommandConfig.cmppActiveTest
                    || messageCommand == CommandConfig.cmppActiveTestResp)
                {
                    return MessageDecoderResult.OK;
                }
                return MessageDecoderResult.NotOK;

            }
            catch (Exception ex)
            {
                _Log.Error(ex.Message, ex);
                return MessageDecoderResult.NeedData;
            }
        }
}

  结语:

博客写的不多,不喜勿碰,谢谢

欢迎指点和纠正

 

mina.net 梳理

标签:toc   博客   apache   电商   构建   事件   head   默认   后台   

原文地址:http://www.cnblogs.com/buruainiaaaa/p/6786527.html

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