====================server=============================================

ExchangeHandlerAdapter

Exchanger

HeaderExchange

HeaderExchangeServer

org.apache.dubbo.registry.integration.RegistryProtocol#export

org.apache.dubbo.registry.integration.RegistryProtocol#doLocalExport

org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper#export

org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper#export

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#export

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#openServer

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#createServer

org.apache.dubbo.remoting.exchange.Exchangers#bind(org.apache.dubbo.common.URL, org.apache.dubbo.remoting.exchange.ExchangeHandler)

return getExchanger(url).bind(url, handler);

org.apache.dubbo.remoting.exchange.support.header.HeaderExchanger#bind

return new HeaderExchangeServer(Transporters.bind(url, new DecodeHandler(new HeaderExchangeHandler(handler))));

HeaderExchangeHandler

DubboPtotocol

DecodeHandler

HeaderExchangeHandler

Transporter

NettyTransporter

-> NettyServer

============================================org.apache.dubbo.remoting.transport.dispatcher.ChannelHandlers#wrap

new MultiMessageHandler(new HeartbeatHandler(ExtensionLoader.getExtensionLoader(Dispatcher.class)

.getAdaptiveExtension().dispatch(handler, url)));

AllChannelHandler ==== ExtensionLoader.getExtensionLoader(Dispatcher.class)

.getAdaptiveExtension().dispatch(handler, url)

DecodeHandler

HeartbeatHandler

AllChannelHandler

MultiMessageHandler

HeartbeatHandler

NettyServer

MultiMessageHandler

org.apache.dubbo.remoting.transport.AbstractServer#doOpen

org.apache.dubbo.remoting.transport.netty4.NettyServer#doOpen

====================client=============================================

ReferenceCountExchangeClient

org.apache.dubbo.config.ReferenceConfig#get

org.apache.dubbo.config.ReferenceConfig#init

org.apache.dubbo.config.ReferenceConfig#createProxy

org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper#refer

org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper#refer

org.apache.dubbo.registry.integration.RegistryProtocol#refer

org.apache.dubbo.registry.integration.RegistryProtocol#doRefer

org.apache.dubbo.registry.zookeeper.ZookeeperRegistry#doSubscribe

org.apache.dubbo.registry.support.AbstractRegistry#notify(org.apache.dubbo.common.URL, org.apache.dubbo.registry.NotifyListener, java.util.List<org.apache.dubbo.common.URL>)

org.apache.dubbo.registry.integration.RegistryDirectory#notify

org.apache.dubbo.registry.integration.RegistryDirectory#refreshOverrideAndInvoker

org.apache.dubbo.registry.integration.RegistryDirectory#refreshInvoker

org.apache.dubbo.registry.integration.RegistryDirectory#toInvokers

org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper#refer

org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper#buildInvokerChain

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#refer

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#getClients

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#getSharedClient

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#buildReferenceCountExchangeClientList

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#buildReferenceCountExchangeClient

org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol#initClient

心跳，断线重连

org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeClient#HeaderExchangeClient

org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker#doInvoke

org.apache.dubbo.rpc.protocol.InvokerWrapper#invoke

org.apache.dubbo.rpc.listener.ListenerInvokerWrapper#invoke

org.apache.dubbo.rpc.protocol.AbstractInvoker#invoke

org.apache.dubbo.rpc.protocol.dubbo.DubboInvoker#doInvoke

org.apache.dubbo.rpc.protocol.dubbo.ReferenceCountExchangeClient#request(java.lang.Object, int)

org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeClient#request(java.lang.Object, int)

org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeChannel#request(java.lang.Object, int)