CLI: Support getting metadata from metadataCenter

dubbogo-cli/README.md

@@ -60,6 +60,26 @@ dubbogo-cli supports the following capabilities
 
   - View Istio's registration information [ in development ]
 
+
+- View dubbo-go application metadata center information
+
+  - View the metadata information on Zookeeper
+    ```bash
+    $ dubbogo-cli show --mc zookeeper --h 127.0.0.1:2181
+      interface: grpc.health.v1.Health
+      methods: [Watch Check]
+      interface: grpc.reflection.v1alpha.ServerReflection
+      methods: [ServerReflectionInfo]
+      interface: org.apache.dubbo.metadata.MetadataService
+      methods: [GetServiceDefinition GetServiceDefinitionByServiceKey UnsubscribeURL getMetadataInfo PublishServiceDefinition GetMetadataServiceURL GetSubscribedURLs RefreshMetadata GetExportedServiceURLs getExportedURLs ServiceName SetMetadataServiceURL SubscribeURL UnexportURL Version ExportURL]
+      interface: com.apache.dubbo.sample.basic.IGreeter
+      methods: [SayHello SayHelloStream]
+    ```
+
+  - View the metadata information on Nacos [ in development ]
+
+  - View Istio's metadata information [ in development ]
+
 - Debug Dubbo protocol application
 
 - Debug Triple protocol application

dubbogo-cli/README_CN.md

@@ -64,6 +64,26 @@ dubbogo-cli 支持以下能力
 
   - 查看 Istio 的注册信息【功能开发中】
 
+- 查看 dubbo-go 元数据中心信息
+
+    - 查看 Zookeeper 上面的元数据信息, 获取接口及方法列表
+
+      ```bash
+      $ dubbogo-cli show --mc zookeeper --h 127.0.0.1:2181
+        interface: grpc.health.v1.Health
+        methods: [Watch Check]
+        interface: grpc.reflection.v1alpha.ServerReflection
+        methods: [ServerReflectionInfo]
+        interface: org.apache.dubbo.metadata.MetadataService
+        methods: [GetServiceDefinition GetServiceDefinitionByServiceKey UnsubscribeURL getMetadataInfo PublishServiceDefinition GetMetadataServiceURL GetSubscribedURLs RefreshMetadata GetExportedServiceURLs getExportedURLs ServiceName SetMetadataServiceURL SubscribeURL UnexportURL Version ExportURL]
+        interface: com.apache.dubbo.sample.basic.IGreeter
+        methods: [SayHello SayHelloStream]
+      ```
+
+    - 查看 Nacos 上面的元数据信息 【功能开发中】
+
+    - 查看 Istio 的元数据信息【功能开发中】
+
 - 调试 Dubbo 协议接口
 
 - 调试 Triple 协议接口

dubbogo-cli/cmd/show.go

@@ -41,30 +41,68 @@ var showCmd = &cobra.Command{
 
 func init() {
 	rootCmd.AddCommand(showCmd)
-	showCmd.Flags().String("r", "r", "")
+	showCmd.Flags().String("r", "", "")
+	showCmd.Flags().String("mc", "", "Get Metadata in MetadataCenter")
 	showCmd.Flags().String("h", "h", "")
+
 }
 
 func show(cmd *cobra.Command, _ []string) {
+	var (
+		methodsMap map[string][]string
+		err error
+	)
+
 	registry, err := cmd.Flags().GetString("r")
 	if err != nil {
 		panic(err)
 	}
-	host, err := cmd.Flags().GetString("h")
+
+	metadataCenter, err := cmd.Flags().GetString("mc")
 	if err != nil {
 		panic(err)
 	}
-	fact, ok := metadata.GetFactory(registry)
-	if !ok {
-		log.Print("registry not support")
-		return
-	}
-	methodsMap, err := fact("dubbogo-cli", []string{host}).ShowChildren()
+
+	host, err := cmd.Flags().GetString("h")
 	if err != nil {
 		panic(err)
 	}
-	for k, v := range methodsMap {
-		fmt.Printf("interface: %s\n", k)
-		fmt.Printf("methods: %v\n", v)
+
+	if registry != "" {
+		registryFactory, ok := metadata.GetFactory(registry)
+		if !ok {
+			log.Print("registry not support")
+			return
+		}
+		methodsMap, err = registryFactory("dubbogo-cli", []string{host}).ShowRegistryCenterChildren()
+		if err != nil {
+			panic(err)
+		}
+		fmt.Printf("======================\n")
+		fmt.Printf("Registry:\n")
+		for k, v := range methodsMap {
+			fmt.Printf("interface: %s\n", k)
+			fmt.Printf("methods: %v\n", v)
+		}
+		fmt.Printf("======================\n")
+	}
+
+	if metadataCenter != "" {
+		metadataCenterFactory, ok := metadata.GetFactory(metadataCenter)
+		if !ok {
+			log.Print("metadataCenter not support")
+			return
+		}
+		methodsMap, err = metadataCenterFactory("dubbogo-cli", []string{host}).ShowMetadataCenterChildren()
+		if err != nil {
+			panic(err)
+		}
+		fmt.Printf("======================\n")
+		fmt.Printf("MetadataCenter:\n")
+		for k, v := range methodsMap {
+			fmt.Printf("interface: %s\n", k)
+			fmt.Printf("methods: %v\n", v)
+		}
+		fmt.Printf("======================\n")
 	}
 }

dubbogo-cli/metadata/metadata.go

@@ -23,7 +23,8 @@ import (
 
 // MetaData meta data from registration center
 type MetaData interface {
-	ShowChildren() (map[string][]string, error)
+	ShowRegistryCenterChildren() (map[string][]string, error)
+	ShowMetadataCenterChildren() (map[string][]string, error)
 }
 
 // Factory metaData factory function

dubbogo-cli/metadata/zookeeper/zookeeper.go

@@ -18,6 +18,7 @@
 package zookeeper
 
 import (
+	"encoding/json"
 	"fmt"
 	"log"
 	"time"
@@ -30,6 +31,7 @@ import (
 import (
 	"dubbo.apache.org/dubbo-go/v3/common"
 	"dubbo.apache.org/dubbo-go/v3/dubbogo-cli/metadata"
+	"dubbo.apache.org/dubbo-go/v3/metadata/definition"
 )
 
 func init() {
@@ -69,7 +71,7 @@ func (z *ZookeeperMetadataReport) GetChildren(path string) ([]string, error) {
 }
 
 // ShowChildren shou children list
-func (z *ZookeeperMetadataReport) ShowChildren() (map[string][]string, error) {
+func (z *ZookeeperMetadataReport) ShowRegistryCenterChildren() (map[string][]string, error) {
 	methodsMap := map[string][]string{}
 	inters, err := z.GetChildren("")
 	if err != nil {
@@ -104,3 +106,51 @@ func (z *ZookeeperMetadataReport) ShowChildren() (map[string][]string, error) {
 	}
 	return methodsMap, nil
 }
+
+func (z *ZookeeperMetadataReport) ShowMetadataCenterChildren() (map[string][]string, error) {
+	methodsMap := map[string][]string{}
+	inters, err := z.GetChildren("metadata")
+	if err != nil {
+		return nil, err
+	}
+	for _, inter := range inters {
+		path := "metadata/" + inter
+		var methods []string
+		z.searchMetadataProvider(path, &methods)
+
+		if _, ok := methodsMap[inter]; !ok && len(methods) != 0 {
+			methodsMap[inter] = make([]string, 0)
+		}
+		for _, method := range methods {
+			methodsMap[inter] = append(methodsMap[inter], method)
+		}
+	}
+	return methodsMap, nil
+}
+
+func (z *ZookeeperMetadataReport) searchMetadataProvider(path string, methods *[]string) {
+	interChildren, err := z.GetChildren(path)
+	if err != nil {
+		return
+	}
+	for _, interChild := range interChildren {
+		if interChild == "provider" {
+			content , _, err := z.client.GetContent("/" + "dubbo" + "/" + path + "/" + interChild)
+			if err != nil {
+				fmt.Printf("Zookeeper Get Content Error: %v\n", err)
+				return
+			}
+
+			var serviceDefinition definition.FullServiceDefinition
+			err = json.Unmarshal(content, &serviceDefinition)
+			if err != nil {
+				fmt.Printf("Json Unmarshal fail: %v\n", err)
+			}
+			for _, method := range serviceDefinition.Methods {
+				*methods = append(*methods, method.Name)
+			}
+		} else {
+			z.searchMetadataProvider(path + "/" + interChild, methods)
+		}
+	}
+}