12.如何解码响应结果

与编码请求类似，其实上篇文章中我们已经发现了对接DubboCodec。

不细细分析了，列出主要代码，直接看代码就可以了。

com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(Channel, ChannelBuffer)// 读取定长heder
com.alibaba.dubbo.rpc.protocol.dubbo.DubboCodec.decodeBody(Channel, InputStream, byte[])// 读取响应体转成DecodeableRpcResult，并将其做作为com.alibaba.dubbo.remoting.exchange.Response的result即data部分
com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(Channel, InputStream)// 解析方法调用返回值

调用栈如下:

DubboCodec.decodeBody(Channel, InputStream, byte[]) line: 105	
DubboCodec(ExchangeCodec).decode(Channel, ChannelBuffer, int, byte[]) line: 126	
DubboCodec(ExchangeCodec).decode(Channel, ChannelBuffer) line: 87	
DubboCountCodec.decode(Channel, ChannelBuffer) line: 46	
NettyCodecAdapter$InternalDecoder.messageReceived(ChannelHandlerContext, MessageEvent) line: 134	
NettyCodecAdapter$InternalDecoder(SimpleChannelUpstreamHandler).handleUpstream(ChannelHandlerContext, ChannelEvent) line: 80	
DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline$DefaultChannelHandlerContext, ChannelEvent) line: 564	
DefaultChannelPipeline.sendUpstream(ChannelEvent) line: 559	
Channels.fireMessageReceived(Channel, Object, SocketAddress) line: 274	
Channels.fireMessageReceived(Channel, Object) line: 261	
NioWorker.read(SelectionKey) line: 349	
NioWorker.processSelectedKeys(Set<SelectionKey>) line: 280	
NioWorker.run() line: 200