fix: apollo unable to get and watch to the properties file

contrib/config/apollo/apollo.go

@@ -4,6 +4,7 @@ import (
 	"strings"
 
 	"github.com/go-kratos/kratos/v2/config"
+	"github.com/go-kratos/kratos/v2/encoding"
 	"github.com/go-kratos/kratos/v2/log"
 
 	"github.com/apolloconfig/agollo/v4"
@@ -108,10 +109,9 @@ func NewSource(opts ...Option) config.Source {
 
 func format(ns string) string {
 	arr := strings.Split(ns, ".")
-	if len(arr) <= 1 {
+	if len(arr) <= 1 || arr[len(arr)-1] == "properties" {
 		return "json"
 	}
-
 	return arr[len(arr)-1]
 }
 
@@ -120,18 +120,40 @@ func (e *apollo) load() []*config.KeyValue {
 	namespaces := strings.Split(e.opt.namespace, ",")
 
 	for _, ns := range namespaces {
-		value, err := e.client.GetConfigCache(ns).Get("content")
+		if strings.Contains(ns, ".") && !strings.Contains(ns, "properties") &&
+			(format(ns) == "yaml" || format(ns) == "yaml" || format(ns) == "json") {
+			value, err := e.client.GetConfigCache(ns).Get("content")
+			if err != nil {
+				log.Errorf("apollo get config failed，err:%v", err)
+				continue
+			}
+			// serialize the namespace content KeyValue into bytes.
+			kv = append(kv, &config.KeyValue{
+				Key:    ns,
+				Value:  []byte(value.(string)),
+				Format: format(ns),
+			})
+			continue
+		}
+		next := map[string]interface{}{}
+		e.client.GetConfigCache(ns).Range(func(key, value interface{}) bool {
+			// all values are out properties format
+			resolve(genKey(ns, key.(string)), value, next)
+			return true
+		})
+		f := format(ns)
+		codec := encoding.GetCodec(f)
+		val, err := codec.Marshal(next)
 		if err != nil {
-			log.Warnw("apollo get config failed", "err", err)
+			log.Warnf("apollo could not handle namespace %s: %v", ns, err)
+			continue
 		}
-		// serialize the namespace content KeyValue into bytes.
 		kv = append(kv, &config.KeyValue{
 			Key:    ns,
-			Value:  []byte(value.(string)),
+			Value:  val,
-			Format: format(ns),
+			Format: f,
 		})
 	}
-
 	return kv
 }
 
@@ -146,3 +168,54 @@ func (e *apollo) Watch() (config.Watcher, error) {
 	}
 	return w, nil
 }
+
+// resolve convert kv pair into one map[string]interface{} by split key into different
+// map level. such as: app.name = "application" => map[app][name] = "application"
+func resolve(key string, value interface{}, target map[string]interface{}) {
+	// expand key "aaa.bbb" into map[aaa]map[bbb]interface{}
+	keys := strings.Split(key, ".")
+	last := len(keys) - 1
+	cursor := target
+
+	for i, k := range keys {
+		if i == last {
+			cursor[k] = value
+			break
+		}
+
+		// not the last key, be deeper
+		v, ok := cursor[k]
+		if !ok {
+			// create a new map
+			deeper := make(map[string]interface{})
+			cursor[k] = deeper
+			cursor = deeper
+			continue
+		}
+
+		// current exists, then check existing value type, if it's not map
+		// that means duplicate keys, and at least one is not map instance.
+		if cursor, ok = v.(map[string]interface{}); !ok {
+			log.Warnf("duplicate key: %v\n", strings.Join(keys[:i+1], "."))
+			break
+		}
+	}
+}
+
+// genKey got the key of config.KeyValue pair.
+// eg: namespace.ext with subKey got namespace.subKey
+func genKey(ns, sub string) string {
+	arr := strings.Split(ns, ".")
+	if len(arr) < 1 {
+		return sub
+	}
+
+	if len(arr) == 1 {
+		if ns == "" {
+			return sub
+		}
+		return ns + "." + sub
+	}
+
+	return strings.Join(arr[:len(arr)-1], ".") + "." + sub
+}

contrib/config/apollo/parser.go

@@ -13,7 +13,7 @@ func (parser jsonExtParser) Parse(configContent interface{}) (map[string]interfa
 
 type yamlExtParser struct{}
 
-func (parser yamlExtParser) Parse(configContent interface{}) (out map[string]interface{}, err error) {
+func (parser yamlExtParser) Parse(configContent interface{}) (map[string]interface{}, error) {
 	return map[string]interface{}{"content": configContent}, nil
 }
 

contrib/config/apollo/watcher.go

@@ -2,6 +2,8 @@ package apollo
 
 import (
 	"context"
+	"github.com/go-kratos/kratos/v2/encoding"
+	"strings"
 
 	"github.com/go-kratos/kratos/v2/config"
 	"github.com/go-kratos/kratos/v2/log"
@@ -23,14 +25,38 @@ type customChangeListener struct {
 
 func (c *customChangeListener) onChange(namespace string, changes map[string]*storage.ConfigChange) []*config.KeyValue {
 	kv := make([]*config.KeyValue, 0, 2)
-	value, err := c.apollo.client.GetConfigCache(namespace).Get("content")
+	if strings.Contains(namespace, ".") && !strings.Contains(namespace, "properties") &&
+		(format(namespace) == "yaml" || format(namespace) == "yaml" || format(namespace) == "json") {
+		value, err := c.apollo.client.GetConfigCache(namespace).Get("content")
+		if err != nil {
+			log.Warnw("apollo get config failed", "err", err)
+		}
+		kv = append(kv, &config.KeyValue{
+			Key:    namespace,
+			Value:  []byte(value.(string)),
+			Format: format(namespace),
+		})
+
+		return kv
+	}
+
+	next := make(map[string]interface{})
+
+	for key, change := range changes {
+		resolve(genKey(namespace, key), change.NewValue, next)
+	}
+
+	f := format(namespace)
+	codec := encoding.GetCodec(f)
+	val, err := codec.Marshal(next)
 	if err != nil {
-		log.Warnw("apollo get config failed", "err", err)
+		log.Warnf("apollo could not handle namespace %s: %v", namespace, err)
+		return nil
 	}
 	kv = append(kv, &config.KeyValue{
 		Key:    namespace,
-		Value:  []byte(value.(string)),
+		Value:  val,
-		Format: format(namespace),
+		Format: f,
 	})
 
 	return kv