style(metadata): fix format issue && revert some changes

Author: xianingawa-wq

metadata/mapping/metadata/service_name_mapping.go

@@ -92,10 +92,10 @@ func (d *ServiceNameMapping) Get(url *common.URL, listener mapping.MappingListen
 	serviceInterface := url.GetParam(constant.InterfaceKey, "")
 	metadataReports := metadata.GetMetadataReports()
 	if len(metadataReports) == 0 {
-          return nil, perrors.New("can not get mapping in remote cause no metadata report instance found")
-    }
-    var result *gxset.HashSet
-    var errs []error	
+		return nil, perrors.New("can not get mapping in remote cause no metadata report instance found")
+	}
+	var result *gxset.HashSet
+	var errs []error
 	for i, metadataReport := range metadataReports {
 		var reportListener mapping.MappingListener
 		if i == 0 {
@@ -104,7 +104,7 @@ func (d *ServiceNameMapping) Get(url *common.URL, listener mapping.MappingListen
 		set, err := metadataReport.GetServiceAppMapping(serviceInterface, DefaultGroup, reportListener)
 		if err != nil {
 			errs = append(errs, err)
-			continue;
+			continue
 		}
 		if result == nil {
 			result = set
@@ -127,7 +127,7 @@ func (d *ServiceNameMapping) Get(url *common.URL, listener mapping.MappingListen
 func (d *ServiceNameMapping) Remove(url *common.URL) error {
 	serviceInterface := url.GetParam(constant.InterfaceKey, "")
 	metadataReports := metadata.GetMetadataReports()
-	if metadataReports == nil || len(metadataReports) == 0 {
+	if len(metadataReports) == 0 {
 		return perrors.New("can not remove mapping in remote cause no metadata report instance found")
 	}
 	var errs []error

metadata/report_instance.go

@@ -91,9 +91,9 @@ func GetMetadataReportByRegistry(registry string) report.MetadataReport {
 		return r
 	}
 	if r, ok := instances[constant.DefaultKey]; ok {
-        logger.Infof("[Metadata] no metadata report bound to registryId=%s, falling back to default", registry)
-        return r
-      }
+		logger.Infof("[Metadata] no metadata report bound to registryId=%s, falling back to default", registry)
+		return r
+	}
 	logger.Warnf("[Metadata] no metadata report found for registryId=%s", registry)
 	return nil
 }