Tao Release Notes

Tao 1.7.0 TODOs:
. HashedWheelTImer
. 使用反射改进Handler设计
. read about teleport
. Tao - Go语言实现的TCP网络编程框架 英文翻译
. BufferSizeOption改为ChannelSizeOption
. 定时器重构
TimedTask要带上net id作为context，把这个接口封装好

Annoucing Tao 1.6.0

1. Bugfix: writeLoop() drains all pending messages before exit;
   writeLoop()函数退出前将所有的网络数据包发送完毕；
2. Renaming getter methods according to Effective Go;
   根据Effective Go重命名getter方法；
3. Bugfix: timer task expired forever due to system clock affected by NTP;
   修复因为受NTP协议校正系统时钟偏差的影响，导致定时任务永远过期的bug；
4. Bugfix: asyncWrite() do not return error if called after ServerConn or ClientConn closes;
   修复网络连接关闭后调用asyncWrite()不返回错误的bug；
5. Providing WorkerSizeOption() for tuning the size of worker go-routine pool;
   提供WorkerSizeOption()来调节工作者线程池大小；
6. Providing BufferSizeOption() for tuning the size of buffered channel;
   提供BufferSizeOption()来调节缓冲通道大小；
7. Providing ReconnectOption() for activating ClientConn's reconnecting mechanism;
   提供ReconnectOption()来启动ClientConn的断线重连机制；
8. Providing CustomCodecOption() for setting self-defined codec;
   提供CustomCodecOption() 来设置自定义编解码器；
9. Providing TLSCredsOption() for running a TLS server;
   提供TLSCredsOption()来运行TLS服务器；
10. Providing OnConnectOption(), OnMessageOption(), OnCloseOption() and OnErrorOption() for setting callbacks of the four situations respectively;
    提供OnConnectOption(), OnMessageOption(), OnCloseOption() 和 OnErrorOption()来设置四种情况下的回调函数；
11. Use the standard sync.Map instead of map guarded by rwmutex;
    使用标准库中的sync.Map替换使用rwmutex保护的map；

Anncoucing Tao 1.5.0

1. A Golang-style redesigning of the overall framework, a reduce about 500+ lines of codes;
   按照Go语言风格重新设计的整体框架，精简500多行代码；
2. Providing new Server, ClientConn and ServerConn struct and a WriteCloser interface;
   提供Server，ClientConn和ServerConn三种新结构和WriteCloser新接口；
3. Using standard context package to manage and spread request-scoped data acrossing go-routines;
   使用标准库中的context包在多个Go线程中管理和传播与请求有关的数据；
4. Graceful stopping, all go-routines are related by context, and they will be noticed and exit when server stops or connection closes;
   优雅停机，所有的Go线程都通过上下文进行关联，当服务器停机或连接关闭时它们都会收到通知并执行退出；
5. Providing new type HandlerFunc func(context.Context, WriteCloser) for defining message handlers;
   提供新的HandlerFunc类型来定义消息处理器；
6. Developers can now use NewContextWithMessage() and MessageFromContext() to put and get message they are about to use in handler function's context, this also leads to a more clarified design;
   开发者现在可以通过NewContextWithMessage()和MessageFromContext()函数来在上下文中存取他们将在处理器函数中使用的消息，这样的设计更简洁；
7. Go-routine functions readLoop(), writeLoop() and handleLoop() are all optimized to serve both ServerConn and ClientConn, serveral dead-lock bugs such as blocking on channels are fixed;
   优化Go线程函数readLoop()，writeLoop()和handleLoop()使得它们能同时为ServerConn和ClientConn服务，修复了多个“通道阻塞”的死锁问题；
8. Reconnecting mechanism of ClientConn is redesigned and optimized;
   重新设计和优化ClientConn的断线重连机制；

Announcing Tao 1.4.0

1. bugfix：TLS重连失败问题；
   bugfix: failed to reconnect the TLS connection;
2. bugfix：ConnectionMap死锁问题；
   bugfix: ConnectionMap dead-lock problem;
3. 优化TCP网络连接的关闭过程；
   Optimize the closing process of TCP connection;
4. 优化服务器的关闭过程；
   Optimize the closing process of server;
5. 更优雅的消息处理注册接口；
   More elegant message handler register interface;

Announcing Tao 1.3.0

1. bugfix：修复断线重连状态不一致问题；
   bugfix: fixed inconsistent status caused by reconnecting;
2. bugfix：修复ServerConnection和TimingWheel在连接关闭时并发访问导致崩溃问题；
   bugfix: fixed a corruption caused by concurrent accessing between ServerConnection and TimingWheel during connection closing;
3. 无锁且线程安全的TimingWheel，优化CPU占用率；
   Lock-free and thread-safe TimingWheel, optimized occupancy rate;
4. bugfix：修复TLS配置文件读取函数；
   bugfix: Fixed errors when loading TLS config;
5. 添加消息相关的Context结构；简化消息注册机制，直接注册处理函数到HandlerMap；
   A message-related Context struct added; Register handler functions in HandlerMap directly to simplify message registration mechanism;
6. 合并NewClientConnection()和NewTLSClientConnection()，提供一致的API；
   Combine NewTLSConnection() into NewClientConnection(), providing a consistent API;
7. 工作者线程池改造成单例模式；
   Make WorkerPool a singleton pattern;
8. 使用Holmes日志库代替glog；
   Using Holmes logging package instead of glog;
9. 添加metrics.go：基于expvar标准包导出服务器关键信息；
   Add metrics.go: exporting critical server information based on expvar standard pacakge;

Announcing Tao 1.2.0

1. 更优雅的消息注册接口；
   More elegant message register interface;
2. TCPConnection的断线重连机制；
   TCPConnection reconnecting upon closing;
3. bugfix：协议未注册时不关闭客户端连接；
   bugfix: Don't close client when messages not registered;
4. bugfix：在readLoop()协程中处理心跳时间戳更新；
   bugfix: Updating heart-beat timestamp in readLoop() go-routine;
5. bugfix：Message接口使用Serialize()替代之前的MarshalBinary()，以免框架使用者使用gob.Encoder/Decoder的时候栈溢出；
   bugfix: Use Serialize() instead of MarshalBinary() in Message interface, preventing stack overflows when framework users use gob.Encoder/Decoder;
6. bugfix：当应用层数据长度大于0时才对其进行序列化；
   bugfix: Serialize application data when its length greater than 0;
7. 新API：SetCodec()，允许TCPConnection自定义编解码器；
   New API: SetCodec() allowing TCPConnection defines its own codec;
8. 新API：SetDBInitializer()，允许框架使用者定义数据访问接口；
   New API: SetDBInitializer() allowing framework users define data access interface;
9. 允许框架使用者在TCPConnection上设置自定义数据；
   Allowing framework users setting custom data on TCPConnection;
10. 为新客户端连接的启动单独开辟一个对应的go协程；
    Allocating a corresponding go-routine for newly-connected clients respectively;
11. bugfix：写事件循环在连接关闭时将信道中的数据全部发送出去；
    bugfix: writeLoop() flushes all packets left in channel when performing closing;
12. bugfix：服务器和客户端连接等待所有go协程关闭后再退出；
    bugfix: Servers and client connections wait for the exits of all go-routines before shutting down;
13. 重构Server和Connection，采用针对接口编程的设计；
    Refactoring Server and Connection, adopting a programming-by-interface design;
14. 设置500毫秒读超时，防止readLoop()发生阻塞；
    Setting 500ms read-timeout prevents readLoop() from blocking;

Annoucing Tao 1.1.0

1. 添加注释，提高代码可读性
   Add comments, make it more readable;
2. 服务器的最大并发连接数（默认1000）
   Server max connections limit (default to 1000);
3. 新API：TCPServer：NewTLSTCPServer() 创建传输层安全的TCP服务器
   New API: NewTLSTCPServer() for creating TLS-supported TCP server;
4. 新特性：TCPServer：SetOnScheduleCallback() 由框架使用者来定义计划任务（比如心跳）
   Make scheduled task managed by framwork users;
5. 新特性：支持默认的消息编解码器TypeLengthValueCodec，并允许框架使用者开发自定义编解码器
   Support TypeLengthValueCodec by default, allow framework users develop their own codecs;