1. netty-common模块concurrent包。 Netty的并发包真的很优质，你可能会在很多地方看见Netty的源码。我也参考Netty写了一套自己的并发工具集。
2. codec中的部分常用类，有点久远了，记得不是很清楚了。

1. 注释完再公开是不现实的，源码太多，而且他们也在不停的更新。
2. Netty的并发模块写的真的很不错，我自己参考实现了一套并发工具，真的用的很舒服。

强烈建议大家了解一下JCTools库，我是做游戏的，该工具非常适合游戏，个人感觉比Disruptor的更适合游戏。

-------------------------------------------------------------- 分割线 -----------------------------------------------------

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

• Web Site
• Downloads
• Documentation
• @netty_project

For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.

You require the following to build Netty:

• Latest stable Oracle JDK 7
• Latest stable Apache Maven
• If you are on Linux, you need additional development packages installed on your system, because you'll build the native transport.

Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.

Development of all versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.

Netty can be used in modular JDK9 applications as a collection of automatic modules. The module names follow the reverse-DNS style, and are derived from subproject names rather than root packages due to historical reasons. They are listed below:

• io.netty.all
• io.netty.buffer
• io.netty.codec
• io.netty.codec.dns
• io.netty.codec.haproxy
• io.netty.codec.http
• io.netty.codec.http2
• io.netty.codec.memcache
• io.netty.codec.mqtt
• io.netty.codec.redis
• io.netty.codec.smtp
• io.netty.codec.socks
• io.netty.codec.stomp
• io.netty.codec.xml
• io.netty.common
• io.netty.handler
• io.netty.handler.proxy
• io.netty.resolver
• io.netty.resolver.dns
• io.netty.transport
• io.netty.transport.epoll (native omitted - reserved keyword in Java)
• io.netty.transport.kqueue (native omitted - reserved keyword in Java)
• io.netty.transport.unix.common (native omitted - reserved keyword in Java)
• io.netty.transport.rxtx
• io.netty.transport.sctp
• io.netty.transport.udt

Automatic modules do not provide any means to declare dependencies, so you need to list each used module separately in your module-info file.