netty in action 读书笔记

■ Bootstrapping
■ ChannelOptions and attributes

bootstrapping an application is the process of configuring it to run—though the details of the process may not be as simple as its definition, especially in network applications.

启动一个应用的门面模式的设计。

bootstrap的继承关系。

This compatibility must be maintained; you can’t mix components having different prefixes, such as NioEventLoopGroup and OioSocketChannel. The following listing shows an attempt to do just that.
不同前缀的不能混用。

Suppose your server is processing a client request that requires it to act as a client to a third system. This can happen when an application, such as a proxy server, has to integrate with an organization’s existing systems, such as web services or databases. In such cases you’ll need to bootstrap a client Channel from a ServerChannel.

在一个Channel中重新连接一个Serverd的NettyClient 这个也算是一个新的用法吧。就是传说中的RPC通信。

The topic we’ve discussed in this section and the solution presented reflect a general guideline in coding Netty applications: reuse EventLoops wherever possible to reduce the cost of thread creation.

重新利用EventLoops，把这个类EventLoops当做线程池来进行使用，避免线程池的消耗

Manually configuring every channel when it’s created could become quite tedious. Fortunately, you don’t have to. Instead, you can use option() to apply ChannelOptions to a bootstrap. The values you provide will be applied automatically to all Channels created in the bootstrap. The ChannelOptions available include low-level connection details such as keep-alive or timeout properties and buffer settings.

netty针对所有的链接设置超时等操作，option()操作针对的是全部的Channel。

Netty offers the AttributeMap abstraction, a collection provided by the channel and boot- strap classes, and AttributeKey, a generic class for inserting and retrieving attri- bute values. With these tools, you can safely associate any kind of data item with both client and server Channels.

Channel上面绑定参数和参数的值。

八个类一一的介绍完毕，需要写一个自己的总结出来，总结netty运行的的过程，包括扩展的协议之类的，只是把运行的的过程梳理一下。

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