refine config_client listen config (nacos-group#644)

Author: binbin0325

clients/config_client/config_client.go

@@ -402,71 +402,61 @@ func (client *ConfigClient) startInternal() {
 }
 
 func (client *ConfigClient) executeConfigListen() {
-	listenCachesMap := make(map[int][]cacheData, 16)
-	needAllSync := time.Since(client.lastAllSyncTime) >= constant.ALL_SYNC_INTERNAL
-	for _, v := range client.cacheMap.Items() {
-		cache, ok := v.(cacheData)
+	var (
+		needAllSync    = time.Since(client.lastAllSyncTime) >= constant.ALL_SYNC_INTERNAL
+		hasChangedKeys = false
+	)
+
+	listenTaskMap := client.buildListenTask(needAllSync)
+	if len(listenTaskMap) == 0 {
+		return
+	}
+
+	for taskId, caches := range listenTaskMap {
+		request := buildConfigBatchListenRequest(caches)
+		rpcClient := client.configProxy.createRpcClient(client.ctx, fmt.Sprintf("%d", taskId), client)
+		iResponse, err := client.configProxy.requestProxy(rpcClient, request, 3000)
+		if err != nil {
+			logger.Warnf("ConfigBatchListenRequest failure, err:%v", err)
+			continue
+		}
+		if iResponse == nil {
+			logger.Warnf("ConfigBatchListenRequest failure, response is nil")
+			continue
+		}
+		if !iResponse.IsSuccess() {
+			logger.Warnf("ConfigBatchListenRequest failure, error code:%d", iResponse.GetErrorCode())
+			continue
+		}
+		response, ok := iResponse.(*rpc_response.ConfigChangeBatchListenResponse)
 		if !ok {
 			continue
 		}
 
-		if cache.isSyncWithServer {
-			if cache.md5 != cache.cacheDataListener.lastMd5 {
-				cache.executeListener()
-			}
-			if !needAllSync {
-				continue
+		if len(response.ChangedConfigs) > 0 {
+			hasChangedKeys = true
+		}
+		changeKeys := make(map[string]struct{}, len(response.ChangedConfigs))
+		for _, v := range response.ChangedConfigs {
+			changeKey := util.GetConfigCacheKey(v.DataId, v.Group, v.Tenant)
+			changeKeys[changeKey] = struct{}{}
+			if value, ok := client.cacheMap.Get(changeKey); ok {
+				cData := value.(cacheData)
+				client.refreshContentAndCheck(cData, !cData.isInitializing)
 			}
 		}
 
-		cacheDatas := listenCachesMap[cache.taskId]
-		cacheDatas = append(cacheDatas, cache)
-		listenCachesMap[cache.taskId] = cacheDatas
-	}
-	hasChangedKeys := false
-	if len(listenCachesMap) > 0 {
-		for taskId, listenCaches := range listenCachesMap {
-			request := buildConfigBatchListenRequest(listenCaches)
-			rpcClient := client.configProxy.createRpcClient(client.ctx, fmt.Sprintf("%d", taskId), client)
-			iResponse, err := client.configProxy.requestProxy(rpcClient, request, 3000)
-			if err != nil {
-				logger.Warnf("ConfigBatchListenRequest failure,err:%+v", err)
-				continue
-			}
-			if iResponse == nil {
-				logger.Warnf("ConfigBatchListenRequest failure, response is nil")
+		for _, v := range caches {
+			changeKey := util.GetConfigCacheKey(v.dataId, v.group, v.tenant)
+			if _, ok := changeKeys[changeKey]; !ok {
+				v.isSyncWithServer = true
+				client.cacheMap.Set(changeKey, v)
 				continue
 			}
-			if !iResponse.IsSuccess() {
-				logger.Warnf("ConfigBatchListenRequest failure, error code:%+v", iResponse.GetErrorCode())
-				continue
-			}
-			changeKeys := make(map[string]struct{})
-			if response, ok := iResponse.(*rpc_response.ConfigChangeBatchListenResponse); ok {
-				if len(response.ChangedConfigs) > 0 {
-					hasChangedKeys = true
-					for _, v := range response.ChangedConfigs {
-						changeKey := util.GetConfigCacheKey(v.DataId, v.Group, v.Tenant)
-						changeKeys[changeKey] = struct{}{}
-						if cache, ok := client.cacheMap.Get(changeKey); !ok {
-							continue
-						} else {
-							cacheData := cache.(cacheData)
-							client.refreshContentAndCheck(cacheData, !cacheData.isInitializing)
-						}
-					}
-				}
-
-				for _, v := range listenCaches {
-					changeKey := util.GetConfigCacheKey(v.dataId, v.group, v.tenant)
-					if _, ok := changeKeys[changeKey]; !ok {
-						v.isSyncWithServer = true
-						continue
-					}
-					v.isInitializing = true
-				}
-			}
+			v.isInitializing = true
+			client.cacheMap.Set(changeKey, v)
 		}
+
 	}
 	if needAllSync {
 		client.lastAllSyncTime = time.Now()
@@ -509,6 +499,28 @@ func (client *ConfigClient) refreshContentAndCheck(cacheData cacheData, notify b
 	}
 }
 
+func (client *ConfigClient) buildListenTask(needAllSync bool) map[int][]cacheData {
+	listenTaskMap := make(map[int][]cacheData, 8)
+
+	for _, v := range client.cacheMap.Items() {
+		data, ok := v.(cacheData)
+		if !ok {
+			continue
+		}
+
+		if data.isSyncWithServer {
+			if data.md5 != data.cacheDataListener.lastMd5 {
+				data.executeListener()
+			}
+			if !needAllSync {
+				continue
+			}
+		}
+		listenTaskMap[data.taskId] = append(listenTaskMap[data.taskId], data)
+	}
+	return listenTaskMap
+}
+
 func (client *ConfigClient) asyncNotifyListenConfig() {
 	go func() {
 		client.listenExecute <- struct{}{}