## Netty核心

![](img\architecture.png)

 It is composed of three components - buffer, channel, and event model - and all advanced features are built on top of the three core components. 

## Netty重点类

```java
Channel
ChannelFuture
ChannelFactory
ChannelGroup
ChannelGroupFuture 
ChannelBuffer
// A ChannelEvent is handled by a list of ChannelHandlers in a ChannelPipeline.
ChannelPipeline
ChannelHandlers
ChannelEvent
```