init DubboCloudRegistry when subscribe or unsubscribe

spring-cloud-alibaba-examples/spring-cloud-alibaba-dubbo-examples/spring-cloud-dubbo-client-sample/pom.xml

@@ -10,7 +10,6 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>com.alibaba.cloud</groupId>
     <artifactId>spring-cloud-dubbo-client-sample</artifactId>
     <name>Spring Cloud Dubbo Client Sample</name>
 

spring-cloud-alibaba-examples/spring-cloud-alibaba-dubbo-examples/spring-cloud-dubbo-client-sample/src/main/resources/bootstrap.yaml

@@ -12,7 +12,11 @@ spring:
     allow-bean-definition-overriding: true
   cloud:
     nacos:
-      username: nacos
-      password: nacos
       discovery:
-        server-addr: 127.0.0.1:8848
+        username: nacos
+        password: nacos
+        server-addr: 127.0.0.1:8848
+        namespace: public
+
+server:
+  port: 8080

spring-cloud-alibaba-examples/spring-cloud-alibaba-dubbo-examples/spring-cloud-dubbo-server-sample/src/main/resources/bootstrap.yaml

@@ -1,4 +1,6 @@
 dubbo:
+  cloud:
+    subscribed-services: ${spring.application.name}
   scan:
     base-packages: com.alibaba.cloud.dubbo.bootstrap
   protocol: