（原创）自己跟踪Dubbo源码之提供者创建

ServiceBean中的

afterPropertiesSet方法：获取当前项目所有的具体配置项（Registry，Module，Application，Monitor）。

onApplicationEvent方法：初始化完容器以后，因为ServiceBean继承了ApplicationListener，所以会执行onApplicationEvent方法中。
执行onApplicationEvent方法中的export方法，获取该service其他配置项，如是否暴露等。

ServiceConFig中的
doExport方法：接着执行ServiceConFig中的doExport方法，预备暴露，修改暴露状态，获取该service其他配置项，如使用的协议，注册地址，获取接口类型等，
继续检查各种项目，将各个配置项组合生成AbstractServiceConfig，AbstractInterfaceConfig等组合类，检查完毕，并且AbstractServiceConfig等类整理完毕以后，执行真正的doExportUrls方法。

doExportUrls方法：
loadRegistries方法：将之前doExport方法中的注册配置项整理成RegistryConfig类，并且整理生成Service的注册URL
registry://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&owner=william&pid=10000&registry=zookeeper&timestamp=1480988471997，
循环协议配置项，执行doExportUrlsFor1Protocol方法，参数为协议配置项与注册URL。

doExportUrlsFor1Protocol方法：
获取协议的name，如果为空，默认为dubbo协议。获取service本地Host的IP，查看IP是否是本地，如果是本地服务，则直接开启socket，获取serivce端口默认为20800，将解析的协议封装为ProtocolConfig对象存进map对象进行缓存，获取service接口的方法名称加以缓存。
生成service服务的URL：
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
根据暴露状态进行暴露，配置中没有注明scope，则进行service本地暴露，执行exportLocal方法。

exportLocal方法：将本地服务生成的URL作为参数传入，将service服务URL转换成本地service服务URL：
injvm://127.0.0.1/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
进入protocol层，执行export方法，参数为invoker类，该invoker类包含真正的service实现类，接口，以及本地service服务URL。
生成invoker类，默认执行JavassistProxyFactory生成代理。生成完毕，执行ProtocolListenerWrapper类的export方法，参数为invoker。

ProtocolListenerWrapper类中
export方法：为invoker装饰，添加listener和filter。伪装成invoker返回ServiceConFig中的exportLocal方法。

ServiceConFig中的

doExportUrlsFor1Protocol方法：
生成最终的invoker参数为实际service类，类接口，以及修改后的注册URL
registry://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&export=dubbo%3A%2F%2F192.168.10.107%3A20880%2Fcom.alibaba.dubbo.demo.DemoService%3Fanyhost%3Dtrue%26application%3Ddemo-provider%26dubbo%3D2.0.0%26generic%3Dfalse%26interface%3Dcom.alibaba.dubbo.demo.DemoService%26loadbalance%3Droundrobin%26methods%3DsayHello%26owner%3Dwilliam%26pid%3D10000%26side%3Dprovider%26timestamp%3D1480988981014&owner=william&pid=10000&registry=zookeeper&timestamp=1480988471997
将最终的invoker包含service代理类，注册URL（注册中心URL和本地服务URL拼接而成）进行导出，执行类RegistryProtocol的export方法，参数为最终invoker。

进入protocol层，

RegistryProtocol中的

export方法：
执行doLocalExport方法，参数为最终invoker

doLocalExport方法：
对invokerURL进行编码
registry://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&export=dubbo%3A%2F%2F192.168.10.107%3A20880%2Fcom.alibaba.dubbo.demo.DemoService%3Fanyhost%3Dtrue%26application%3Ddemo-provider%26dubbo%3D2.0.0%26generic%3Dfalse%26interface%3Dcom.alibaba.dubbo.demo.DemoService%26loadbalance%3Droundrobin%26methods%3DsayHello%26owner%3Dwilliam%26pid%3D10000%26side%3Dprovider%26timestamp%3D1480988981014&owner=william&pid=10000&registry=zookeeper&timestamp=1480988471997
对整理protocal时获取的map中的export属性值进行编码export=dubbo%3A%2F%2F192.168.10.107%3A20880%2Fcom.alibaba.dubbo.demo.DemoService%3Fanyhost%3Dtrue%26application%3Ddemo-provider%26dubbo%3D2.0.0%26generic%3Dfalse%26interface%3Dcom.alibaba.dubbo.demo.DemoService%26loadbalance%3Droundrobin%26methods%3DsayHello%26owner%3Dwilliam%26pid%3D10000%26side%3Dprovider%26timestamp%3D1480988981014
整理对应service的provider的URL，
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
将此provider的URL作为key向本地缓存寻找是否有exporter。如果没有，将invoker封装为InvokerDelegete（包含invoker与本地provider的url）则生成最终暴露服务的exporter,暴露服务由DubboProtocol类的export方法进行，参数为InvokerDelegete。

DubboProtocol中
export方法：
将本地provider的URL转换为变量key，key为com.alibaba.dubbo.demo.DemoService:20880，将此key与传入的InvokerDelegete，以及exporterMap生成新的DubboExporter，通过ConcurrentHashMap进行缓存，执行开启本地netty服务openServer方法，参数为本地provider的URL：
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

openServer方法：
将URL的host以及IP地址以及Port提取出来，192.168.10.107:20880作为key，本地缓存查找是否存在该server，没有则创建，server为dubbo定义的ExchangeServer类。创建server的方法名为createServer方法，参数为本地provider服务的URL：
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

createServer方法：
首先对传过来的本地provider的URL进行修改，针对readonly事件
原：dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
现：dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&channel.readonly.sent=true&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

再对上面的URL进行修改，针对开启heartbeat
原：dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&channel.readonly.sent=true&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
现：dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&channel.readonly.sent=true&dubbo=2.0.0&generic=false&heartbeat=60000&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

获取默认的server开启方式为netty

继续修改URL，针对编码格式以及负载均衡的配置
原：dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&channel.readonly.sent=true&dubbo=2.0.0&generic=false&heartbeat=60000&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
现：dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&channel.readonly.sent=true&codec=dubbo&dubbo=2.0.0&generic=false&heartbeat=60000&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

将最终修改的URL传给Exchangers进行bind，参数为最终URL与生成DubboProtocol类时创建的成员变量ExchangeHandler requestHandler = new ExchangeHandlerAdapter()，requestHandler 中存在回调函数reply。

Exchangers中

bind方法：
通过spi机制，获取继承了Exchanger接口的实现类，通过meta-inf文件夹下的com.alibaba.dubbo.remoting.exchange.Exchanger文件，获取内容：header=com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchanger，也就是实现类为HeaderExchanger

HeaderExchanger中：

bind方法中：
通过Transporters类进行bind，先生成HeaderExchangeHandler类，HeaderExchangeHandler类持有ExchangeHandler类，ExchangeHandler类来自于DubboProtocol类初始化生成的成员变量，ExchangeHandler持有最主要的InvokerDelegete,继续生成DecodeHandler，DecodeHandler持有HeaderExchangeHandler。将最终生成的DecodeHandler传给Transporters类，执行bind方法，
参数为provider的本地服务url，以及最终生成的DecodeHandler。DecodeHandler持有最重要的InvokerDelegete类。根据spi机制，默认使用NettyTransporter进行最终bind方法的执行。

NettyTransporter中
bind方法：
创建NettyServer类，参数为DecodeHandler与本地provider本地服务URL：
URL为dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&channel.readonly.sent=true&codec=dubbo&dubbo=2.0.0&generic=false&heartbeat=60000&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

NettyServer中
NettyServer构造方法：
创建线程名称，默认开头为“DubboServerHandler”，根据provider本地服务URL进行修改为DubboServerHandler-192.168.10.107:20880，将此线程名称加入到本地服务URL的属性中key为threadname。返回的结果线程名称与DecodeHandler一起进入ChannelHandlers类中的wrap方法。

ChannelHandlers中
wrap方法：
跳转到wrapInternal方法

wrapInternal方法：
根据spi机制，执行AllDispatcher类中的dispatch方法，生成AllChannelHandler类。

AllChannelHandler中：
AllChannelHandler构造方法：
跳转父类WrappedChannelHandler类的构造方法

WrappedChannelHandler中
WrappedChannelHandler构造方法：
根据spi机制，执行FixedThreadPool类中的getExecutor方法，参数为provider本地服务url

FixedThreadPool中
getExecutor方法：
根据provider本地服务url:dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&channel.readonly.sent=true&codec=dubbo&dubbo=2.0.0&generic=false&heartbeat=60000&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&threadname=DubboServerHandler-192.168.10.107:20880&timestamp=1480988981014
以及URL中的参数列表：{owner=william, side=provider, heartbeat=60000, methods=sayHello, dubbo=2.0.0, loadbalance=roundrobin, pid=10000, interface=com.alibaba.dubbo.demo.DemoService, generic=false, codec=dubbo, application=demo-provider, channel.readonly.sent=true, anyhost=true, timestamp=1480988981014, threadname=DubboServerHandler-192.168.10.107:20880}
获取参数列表中的线程名称：DubboServerHandler-192.168.10.107:20880
获取默认的线程池线程数量：200
获取queues数量为：0
创建jdk，concurrent包中的new ThreadPoolExecutor线程池任务，参数为（threads=200，threads=200，根据queues数值取队列类型，0为SynchronousQueue，小于0为LinkedBlockingQueue，大于0指定数值的LinkedBlockingQueue）
创建完线程池之后回到WrappedChannelHandler的构造方法。创建SimpleDataStore对象，将字符串“java.util.concurrent.ExecutorService”，url的port，与线程池一起合并在该对象的map中。
接着进入AbstractServer类中

AbstractServer中
AbstractServer构造方法：
通过url以及handler封装成AbstractPeer类，通过url取得本地连接/192.168.10.107:20880，获取host0.0.0.0，拼接url/0.0.0.0:20880，执行NettyServer类中的doOpen方法开启nettyServer。

NettyServer中
doOpen方法：
开启默认的netty的log日志，继承自InternalLoggerFactory类，通过new ServerBootstrap(channelFactory);开启netty服务器。返回给DubboProtocol类中的createServer方法，返回openServer方法。将创建的nettyServer存放在DubboProtocol类的成员变量serverMap中进行缓存，key为“192.168.10.107:20880”。
返回export方法，将创建的DubboExporter类进行缓存，缓存在exporterMap中，key为“com.alibaba.dubbo.demo.DemoService:20880”，返回ProtocolFilterWrapper类中的export方法，执行filter过滤，返回RegistryProtocol类中的doLocalExport方法，将生成的Exporter与最初的Invoker进行绑定，再次封装成成Exporter，将Exporter类进行缓存，到RegistryProtocol类中的bounds中，key为provider的url:
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

RegistryProtocol中

AbstractRegistryFactory中

getRegistry方法：
处理URL，将传过来的URL中对于service服务的URL去掉，只取前面的注册中心地址：
原：zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&export=dubbo%3A%2F%2F192.168.10.107%3A20880%2Fcom.alibaba.dubbo.demo.DemoService%3Fanyhost%3Dtrue%26application%3Ddemo-provider%26dubbo%3D2.0.0%26generic%3Dfalse%26interface%3Dcom.alibaba.dubbo.demo.DemoService%26loadbalance%3Droundrobin%26methods%3DsayHello%26owner%3Dwilliam%26pid%3D10000%26side%3Dprovider%26timestamp%3D1480988981014&owner=william&pid=10000&timestamp=1480988471997
现：zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997
对该注册中心地址进行修改
原：zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997
现：zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService
从缓存中查找注册中心，如果不存在，则执行createRegistry方法，参数为现URL，zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService，执行类为ZookeeperRegistryFactory，方法为createRegistry方法。

ZookeeperRegistryFactory中

createRegistry方法：
创建ZookeeperRegistry对象，参数为zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997
与zookeeperTransporter对象，进入ZookeeperRegistry类的构造方法ZookeeperRegistry。进入AbstractRegistry类中，执行构造方法。

AbstractRegistry中

AbstractRegistry构造方法：
参数为zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997
设置成员变量registryUrl为该参数URL，创建临时文件C:\Users\sea/.dubbo/dubbo-registry-192.168.10.232.cache与dubbo-registry-192.168.10.232.cache.lock
执行notify方法，参数为配置的zookeeper集群中的其他IPbackup=192.168.10.233:2181,192.168.10.234:2181

notify方法：
参数为配置的所有zk路径：
zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997
zookeeper://192.168.10.233:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997
zookeeper://192.168.10.234:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997
查看是否已经订阅，如果已经订阅，则获取所有相关的NotifyListener执行notify回调方法，生成注册中心失败的话，异步重试。返回ZookeeperRegistry类的ZookeeperRegistry构造方法。

ZookeeperRegistry中

ZookeeperRegistry构造方法：
根据URL的group属性创建zk节点的跟目录，group属性为dubbo,修改为/dubbo，赋值给ZookeeperRegistry类的成员变量root，通过zookeeperTransporter类的connect方法连接注册中心，参数为：
zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997

ZkclientZookeeperTransporter中

connect方法：
创建ZkclientZookeeperClient对象。

ZkclientZookeeperClient中：
ZkclientZookeeperClient构造方法：
将注册中心URL进行缓存，创建KeeperState.SyncConnected，获取url的中所有IP，192.168.10.232:2181,192.168.10.233:2181,192.168.10.234:2181
创建ZkClient节点，对客户端执行subscribeStateChanges方法。将client封装成ZkclientZookeeperClient类，将ZkclientZookeeperClient类封装成ZkclientZookeeperTransporter类，返回ZookeeperClient。
回到ZookeeperRegistry类中的ZookeeperRegistry构造方法。当前zk目录下节点存在dubbo，dubbo下存在节点com.alibaba.dubbo.demo.DemoService，com.alibaba.dubbo.demo.DemoService下有providers节点，

ZookeeperRegistry中
ZookeeperRegistry构造方法：
对返回的ZookeeperClient添加监听事件，存在AbstractZookeeperClient类中的stateListenersSet集合中，当状态为RECONNECTED（重新连接）时，执行recover方法，将该registry进行缓存于AbstractRegistryFactory类中的REGISTRIES中，key为zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService
返回RegistryProtocol类中的export方法，获取到已经与注册中心连接的Url，执行FailbackRegistry类中的register方法。

FailbackRegistry中
register方法：
参数URL：
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
将url参数进行缓存，执行doRegister方法，参数为该provider类的URL，执行ZookeeperRegistry类中的doRegister方法。

ZookeeperRegistry中
doRegister方法：
执行AbstractZookeeperClient类中的create方法。

AbstractZookeeperClient中
create方法：
将provider本地URL转换为类型文件路径的路径：
/dubbo/com.alibaba.dubbo.demo.DemoService/providers/dubbo%3A%2F%2F192.168.10.107%3A20880%2Fcom.alibaba.dubbo.demo.DemoService%3Fanyhost%3Dtrue%26application%3Ddemo-provider%26dubbo%3D2.0.0%26generic%3Dfalse%26interface%3Dcom.alibaba.dubbo.demo.DemoService%26loadbalance%3Droundrobin%26methods%3DsayHello%26owner%3Dwilliam%26pid%3D10000%26side%3Dprovider%26timestamp%3D1480988981014
判断是否是临时节点还是持久化节点，默认为持久化节点，递归执行ZkclientZookeeperClient类中的方法，调用原生zkClient的createPersistent方法，路径为/dubbo/com.alibaba.dubbo.demo.DemoService/providers，最底层目录为临时目录/dubbo/com.alibaba.dubbo.demo.DemoService/providers/dubbo%3A%2F%2F192.168.10.107%3A20880%2Fcom.alibaba.dubbo.demo.DemoService%3Fanyhost%3Dtrue%26application%3Ddemo-provider%26dubbo%3D2.0.0%26generic%3Dfalse%26interface%3Dcom.alibaba.dubbo.demo.DemoService%26loadbalance%3Droundrobin%26methods%3DsayHello%26owner%3Dwilliam%26pid%3D10000%26side%3Dprovider%26timestamp%3D1480988981014
返回RegistryProtocol类中的export方法。

RegistryProtocol中
export方法：
参数为
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
将URL替换为
provider://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&category=configurators&check=false&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
创建overrideSubscribeListener，向注册中心订阅Registry，进入FailbackRegistry类中的subscribe方法，将该服务提供者provider的overrideSubscribeListener进行缓存。

FailbackRegistry中
subscribe方法：
向服务器端发送订阅请求，参数为URL：
provider://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&category=configurators&check=false&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
以及该服务提供者provider的overrideSubscribeListener。执行ZookeeperRegistry类中的doSubscribe方法。

ZookeeperRegistry中
doSubscribe方法：
该服务提供者provider的URL添加进注册中心Listeners的列表中，在zk下创建节点/dubbo/com.alibaba.dubbo.demo.DemoService/configurators。执行notify方法，
参数为
provider://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&category=configurators&check=false&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
服务提供者provider的overrideSubscribeListener。进入AbstractRegistry类中notify方法中

AbstractRegistry中
notify方法：
将configurators节点下的所有url检出，执行该服务提供者下的overrideSubscribeListener。进入RegistryProtocol中的notify方法，覆盖已经有的服务地址。

回到RegistryProtocol中
export方法：
返回新的Exporter对象，过滤ProtocolListenerWrapper中的export方法。将最终的exporter导出
该对象包含：
com.alibaba.dubbo.registry.integration.RegistryProtocol@43f82e78
com.alibaba.dubbo.registry.integration.RegistryProtocol$ExporterChangeableWrapper@2a448449
com.alibaba.dubbo.registry.integration.RegistryProtocol$OverrideListener@753432a2
provider://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&category=configurators&check=false&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014
zookeeper://192.168.10.232:2181/com.alibaba.dubbo.registry.RegistryService?application=demo-provider&backup=192.168.10.233:2181,192.168.10.234:2181&dubbo=2.0.0&interface=com.alibaba.dubbo.registry.RegistryService&owner=william&pid=10000&timestamp=1480988471997

最终回到ServiceConfig类中，doExportUrlsFor1Protocol方法中，并将URL进行缓存。
dubbo://192.168.10.107:20880/com.alibaba.dubbo.demo.DemoService?anyhost=true&application=demo-provider&dubbo=2.0.0&generic=false&interface=com.alibaba.dubbo.demo.DemoService&loadbalance=roundrobin&methods=sayHello&owner=william&pid=10000&side=provider&timestamp=1480988981014

（原创）自己跟踪Dubbo源码之提供者创建

猜你喜欢