Dubbo源码之服务引用

ReferenceBean.getObject()
  -->ReferenceConfig.get()
    -->init()
      -->createProxy(map)
        -->refprotocol.refer(interfaceClass, urls.get(0))
          -->ExtensionLoader.getExtensionLoader(Protocol.class).getExtension("registry");
          -->extension.refer(arg0, arg1);
            -->ProtocolFilterWrapper.refer
              -->RegistryProtocol.refer
                -->registryFactory.getRegistry(url)//建立zk的连接，和服务端发布一样（省略代码）
                -->doRefer(cluster, registry, type, url)
                  -->registry.register//创建zk的节点，和服务端发布一样（省略代码）。节点名为：dubbo/com.alibaba.dubbo.demo.DemoService/consumers
                  -->registry.subscribe//订阅zk的节点，和服务端发布一样（省略代码）。   /dubbo/com.alibaba.dubbo.demo.DemoService/providers, 
                                                                        /dubbo/com.alibaba.dubbo.demo.DemoService/configurators,
                                                                         /dubbo/com.alibaba.dubbo.demo.DemoService/routers]
                    -->notify(url, listener, urls);
                      -->FailbackRegistry.notify
                        -->doNotify(url, listener, urls);
                          -->AbstractRegistry.notify
                            -->saveProperties(url);//把服务端的注册url信息更新到C:\Users\bobo\.dubbo\dubbo-registry-192.168.48.117.cache
                            -->registryCacheExecutor.execute(new SaveProperties(version));//采用线程池来处理
                          -->listener.notify(categoryList)
                            -->RegistryDirectory.notify
                              -->refreshInvoker(invokerUrls)//刷新缓存中的invoker列表
                                -->destroyUnusedInvokers(oldUrlInvokerMap,newUrlInvokerMap); // 关闭未使用的Invoker
                                -->最终目的：刷新Map<String, Invoker<T>> urlInvokerMap 对象
                                                                                                                         刷新Map<String, List<Invoker<T>>> methodInvokerMap对象
                  -->cluster.join(directory)//加入集群路由
                    -->ExtensionLoader.getExtensionLoader(com.alibaba.dubbo.rpc.cluster.Cluster.class).getExtension("failover");
                      -->MockClusterWrapper.join
                        -->this.cluster.join(directory)
                          -->FailoverCluster.join
                            -->return new FailoverClusterInvoker<T>(directory)
                            -->new MockClusterInvoker
        -->proxyFactory.getProxy(invoker)//创建服务代理
          -->ProxyFactory$Adpative.getProxy
            -->ExtensionLoader.getExtensionLoader(com.alibaba.dubbo.rpc.ProxyFactory.class).getExtension("javassist");
              -->StubProxyFactoryWrapper.getProxy
                -->proxyFactory.getProxy(invoker)
                  -->AbstractProxyFactory.getProxy
                    -->getProxy(invoker, interfaces)
                      -->Proxy.getProxy(interfaces)//目前代理对象interface com.alibaba.dubbo.demo.DemoService, interface com.alibaba.dubbo.rpc.service.EchoService
                      -->InvokerInvocationHandler// 采用jdk自带的InvocationHandler，创建InvokerInvocationHandler对象。