refactor(ratio): replace maps with RWMap for improved concurrency handling

common/topup-ratio.go

@@ -2,29 +2,37 @@ package common
 
 import (
 	"encoding/json"
+	"sync"
 )
 
-var TopupGroupRatio = map[string]float64{
+var topupGroupRatio = map[string]float64{
 	"default": 1,
 	"vip":     1,
 	"svip":    1,
 }
+var topupGroupRatioMutex sync.RWMutex
 
 func TopupGroupRatio2JSONString() string {
-	jsonBytes, err := json.Marshal(TopupGroupRatio)
+	topupGroupRatioMutex.RLock()
+	defer topupGroupRatioMutex.RUnlock()
+	jsonBytes, err := json.Marshal(topupGroupRatio)
 	if err != nil {
-		SysError("error marshalling model ratio: " + err.Error())
+		SysError("error marshalling topup group ratio: " + err.Error())
 	}
 	return string(jsonBytes)
 }
 
 func UpdateTopupGroupRatioByJSONString(jsonStr string) error {
-	TopupGroupRatio = make(map[string]float64)
-	return json.Unmarshal([]byte(jsonStr), &TopupGroupRatio)
+	topupGroupRatioMutex.Lock()
+	defer topupGroupRatioMutex.Unlock()
+	topupGroupRatio = make(map[string]float64)
+	return json.Unmarshal([]byte(jsonStr), &topupGroupRatio)
 }
 
 func GetTopupGroupRatio(name string) float64 {
-	ratio, ok := TopupGroupRatio[name]
+	topupGroupRatioMutex.RLock()
+	defer topupGroupRatioMutex.RUnlock()
+	ratio, ok := topupGroupRatio[name]
 	if !ok {
 		SysError("topup group ratio not found: " + name)
 		return 1