Ribbon

ZoneAwareLoadBalancer#chooseServer选择server并调用父类方法

LoadBalancerInterceptor 1.为restTemplate添加拦截器

DynamicServerListLoadBalancer#enableAndInitLearnNewServersFeature1.启动自动更新serverList的线程

Runnable线程（30s执行一次）

RibbonLoadBalancerClient#getServer

1.初始化IPing：NIWSDiscoveryPing2.初始ribbonServerList：DiscoveryEnabledNIWSServerList

DynamicServerListLoadBalancer#updateAllServerList

BaseLoadBalancer#chooseServer

DynamicServerListLoadBalancer#updateListOfServers更新服务信息

Ribbon

DynamicServerListLoadBalancer#restOfInit调用构造方法中的restOfInit方法

返回server列表然后调用updateAllServerList方法

NamedContextFactory#getContext获取容器的上下文contexts中包含则返回负责新建一个容器

LoadBalancerInterceptor#intercept1.拦截器方法，restTemplate执行getforObgect方法时候最后会调用此拦截器

spring.factories

NamedContextFactory#getInstance1.新建此容器的上下文，然后getBean获取类的实例化

AutoConfigureBefore

RibbonLoadBalancerClient#getLoadBalancer1.获取此类的信息，委托给Factory处理

SpringClientFactory#getLoadBalancer1.调用方法，然后调用其父类的getInstance方法

@ConditionalOnClass(RestTemplate.class)@ConditionalOnBean(LoadBalancerClient.class)LoadBalancerAutoConfiguration

@AutoConfigureAfter(RibbonAutoConfiguration.class)@RibbonClients(defaultConfiguration = EurekaRibbonClientConfiguration.class)RibbonEurekaAutoConfiguration

初始化ZoneAwareLoadBalancer调用父类构造方法

1.初始化SmartInitializingSingleton：SmartInitializingSingleton2.初始化LoadBalancerRequestFactory：LoadBalancerRequestFactory3.初始化LoadBalancerInterceptor：LoadBalancerInterceptor4.初始化RestTemplateCustomizer：RestTemplateCustomizer

NamedContextFactory#createContext新建上下文，并且将RibbonClientConfiguration放进去，最后调用context的refresh方法刷新容器

RibbonLoadBalancerClient#execute1.拦截器会调用此实现类的execute方法

DiscoveryEnabledNIWSServerList#getUpdatedListOfServers

DynamicServerListLoadBalancer#setServersList1.调用父类的serServerList方法2.将server分到不同的zone内

ServerListUpdater.UpdateAction#doUpdate

BaseLoadBalancer.setServersList将server列表赋值

SpringClientFactory#super注入RibbonClientConfiguration类

1.初始化SpringClientFactory：SpringClientFactory2.初始化LoadBalancerClient：RibbonLoadBalancerClient3.初始化PropertiesFactory：PropertiesFactory4.初始化serverIntrospector：DefaultServerIntrospector

DiscoveryEnabledNIWSServerList#obtainServersViaDiscovery1.通过eurekaClientProvider获取对应EurekaClient2.通过vipAdress(实际就是serviceName)获取对应注册表集合信息3.将注册信息组装成DiscoveryEnabledServer列表

@Configuration(proxyBeanMethods = false)EurekaRibbonClientConfiguration

AnnotationConfigApplicationContext#refresh初始化容器

1.初始化ribbonRule: ZoneAvoidanceRule2.初始化ribbonPing：DummyPing3.初始化ribbonServerList：ConfigurationBasedServerList4.初始化ServerListUpdater：PollingServerListUpdater5.初始化ILoadBalancer：ZoneAwareLoadBalancer6.初始化ribbonServerListFilter：ZonePreferenceServerListFilter7.初始化ribbonLoadBalancerContext：RibbonLoadBalancerContext8.初始化serverIntrospector：DefaultServerIntrospector