【Netty源碼分析】ChannelPipeline（二）

在上一篇部落格​​【Netty源碼學習】ChannelPipeline（一）​​中我們隻是大體介紹了ChannelPipeline相關的知識，其實介紹的并不詳細，接下來我們詳細介紹一下ChannelPipeline及其實作類。

1、ChannelPipeline的結構圖：

這張ChannelPipeline的結構圖我們應該是看到過的，其實在ChannelPipeline接口中隻是覆寫了ChannelInboundInvoker和ChannelOutboundInvoker兩個接口的方法。上一篇文章中我們了解到DefaultChannelPipeline其實是ChannelHandlerContext的雙向連結清單，是以接口ChannelPipeline中定義的抽象方法很多部分是有關ChannelHanderContext添加到雙向連結清單中的操作的。

ChannelPipeline addFirst(String name, ChannelHandler handler);
ChannelPipeline addFirst(EventExecutorGroup group, String name, ChannelHandler handler);
    ChannelPipeline addLast(String name, ChannelHandler handler);
    ChannelPipeline addLast(EventExecutorGroup group, String name, ChannelHandler handler);
    ChannelPipeline addBefore(String baseName, String name, ChannelHandler handler);
    ChannelPipeline addBefore(EventExecutorGroup group, String baseName, String name, ChannelHandler handler);
    ChannelPipeline addAfter(String baseName, String name, ChannelHandler handler);
    ChannelPipeline addAfter(EventExecutorGroup group, String baseName, String name, ChannelHandler handler);
    ChannelPipeline addFirst(ChannelHandler... handlers);
    ChannelPipeline addFirst(EventExecutorGroup group, ChannelHandler... handlers);
    ChannelPipeline addLast(ChannelHandler... handlers);
    ChannelPipeline addLast(EventExecutorGroup group, ChannelHandler... handlers);
    ChannelPipeline remove(ChannelHandler handler);
    ChannelHandler remove(String name);
    <T extends ChannelHandler> T remove(Class<T> handlerType);
    ChannelHandler removeFirst();
    ChannelHandler removeLast();
    ChannelPipeline replace(ChannelHandler oldHandler, String newName, ChannelHandler newHandler);
    ChannelHandler replace(String oldName, String newName, ChannelHandler newHandler);
    <T extends ChannelHandler> T replace(Class<T> oldHandlerType, String newName,
    ChannelHandler first();
    ChannelHandlerContext firstContext();
    ChannelHandler last();
    ChannelHandlerContext lastContext();
    ChannelHandler get(String name);
    <T extends ChannelHandler> T get(Class<T> handlerType);
    ChannelHandlerContext context(ChannelHandler handler);
    ChannelHandlerContext context(String name);
    ChannelHandlerContext context(Class<? extends ChannelHandler> handlerType);
    Channel channel();
    List<String> names();
    Map<String, ChannelHandler> toMap();      

ChannelPipeline接口中其他的抽象方法就是覆寫的

ChannelInboundInvoker和ChannelOutboundInvoker兩個接口的方法了

@Override
    ChannelPipeline fireChannelRegistered();
     @Override
    ChannelPipeline fireChannelUnregistered();
    @Override
    ChannelPipeline fireChannelActive();
    @Override
    ChannelPipeline fireChannelInactive();
    @Override
    ChannelPipeline fireExceptionCaught(Throwable cause);
    @Override
    ChannelPipeline fireUserEventTriggered(Object event);
    @Override
    ChannelPipeline fireChannelRead(Object msg);
    @Override
    ChannelPipeline fireChannelReadComplete();
    @Override
    ChannelPipeline fireChannelWritabilityChanged();
    @Override
    ChannelPipeline flush();