refactor: code optimisation

env/server/server.go

@@ -43,7 +43,7 @@ type Info struct {
 	nextTryConnTime int64
 }
 
-//GetServersLen 获取服务器数组
+// GetServersLen 获取服务器数组
 func GetServers(configIp string) map[string]*config.ServerInfo {
 	serverLock.Lock()
 	defer serverLock.Unlock()
@@ -53,7 +53,7 @@ func GetServers(configIp string) map[string]*config.ServerInfo {
 	return ipMap[configIp].serverMap
 }
 
-//GetServersLen 获取服务器数组长度
+// GetServersLen 获取服务器数组长度
 func GetServersLen(configIp string) int {
 	serverLock.Lock()
 	defer serverLock.Unlock()
@@ -72,7 +72,7 @@ func SetServers(configIp string, serverMap map[string]*config.ServerInfo) {
 	}
 }
 
-//SetDownNode 设置失效节点
+// SetDownNode 设置失效节点
 func SetDownNode(configService string, serverHost string) {
 	serverLock.Lock()
 	defer serverLock.Unlock()
@@ -99,15 +99,15 @@ func SetDownNode(configService string, serverHost string) {
 
 	for k, server := range s.serverMap {
 		// if some node has down then select next node
-		if strings.Index(k, serverHost) > -1 {
+		if strings.Contains(k, serverHost) {
 			server.IsDown = true
 		}
 	}
 }
 
-//IsConnectDirectly is connect by ip directly
-//false : yes
-//true : no
+// IsConnectDirectly is connect by ip directly
+// false : yes
+// true : no
 func IsConnectDirectly(configIp string) bool {
 	serverLock.Lock()
 	defer serverLock.Unlock()
@@ -122,7 +122,7 @@ func IsConnectDirectly(configIp string) bool {
 	return false
 }
 
-//SetNextTryConnTime if this connect is fail will set this time
+// SetNextTryConnTime if this connect is fail will set this time
 func SetNextTryConnTime(configIp string, nextPeriod int64) {
 	serverLock.Lock()
 	defer serverLock.Unlock()

extension/file_test.go

@@ -22,19 +22,18 @@ import (
 
 	"github.com/apolloconfig/agollo/v4/env/config"
 
-	"github.com/apolloconfig/agollo/v4/env/file"
 	. "github.com/tevid/gohamcrest"
 )
 
 type TestFileHandler struct {
 }
 
-//WriteConfigFile 写入配置文件
+// WriteConfigFile 写入配置文件
 func (r *TestFileHandler) WriteConfigFile(config *config.ApolloConfig, configPath string) error {
 	return nil
 }
 
-//GetConfigFile 获得配置文件路径
+// GetConfigFile 获得配置文件路径
 func (r *TestFileHandler) GetConfigFile(configDir string, appID string, namespace string) string {
 	return ""
 }
@@ -48,6 +47,5 @@ func TestSetFileHandler(t *testing.T) {
 
 	fileHandler := GetFileHandler()
 
-	b := fileHandler.(file.FileHandler)
-	Assert(t, b, NotNilVal())
+	Assert(t, fileHandler, NotNilVal())
 }

storage/event_dispatch.go

@@ -46,7 +46,7 @@ type Listener interface {
 	Event(event *Event)
 }
 
-//Dispatcher is the observer
+// Dispatcher is the observer
 type Dispatcher struct {
 	listeners map[string][]Listener
 }
@@ -90,10 +90,7 @@ func (d *Dispatcher) RegisterListener(listenerObject Listener, keys ...string) e
 
 func invalidKey(key string) bool {
 	_, err := regexp.Compile(key)
-	if err != nil {
-		return true
-	}
-	return false
+	return err != nil
 }
 
 // UnRegisterListener 用于为某些key注释Listener
@@ -123,7 +120,7 @@ func (d *Dispatcher) UnRegisterListener(listenerObj Listener, keys ...string) er
 	return nil
 }
 
-//OnChange 实现Apollo的ChangeEvent处理
+// OnChange 实现Apollo的ChangeEvent处理
 func (d *Dispatcher) OnChange(changeEvent *ChangeEvent) {
 	if changeEvent == nil {
 		return

storage/repository.go

@@ -508,7 +508,7 @@ func (c *Cache) UpdateApolloConfigCache(configurations map[string]interface{}, e
 		c.waitInit.Done()
 	}(config)
 
-	if (configurations == nil || len(configurations) == 0) && config.cache.EntryCount() == 0 {
+	if (len(configurations) == 0) && config.cache.EntryCount() == 0 {
 		return nil
 	}
 
@@ -521,27 +521,25 @@ func (c *Cache) UpdateApolloConfigCache(configurations map[string]interface{}, e
 
 	changes := make(map[string]*ConfigChange)
 
-	if configurations != nil {
-		// update new
-		// keys
-		for key, value := range configurations {
-			// key state insert or update
-			// insert
-			if !mp[key] {
-				changes[key] = createAddConfigChange(value)
-			} else {
-				// update
-				oldValue, _ := config.cache.Get(key)
-				if !reflect.DeepEqual(oldValue, value) {
-					changes[key] = createModifyConfigChange(oldValue, value)
-				}
+	// update new
+	// keys
+	for key, value := range configurations {
+		// key state insert or update
+		// insert
+		if !mp[key] {
+			changes[key] = createAddConfigChange(value)
+		} else {
+			// update
+			oldValue, _ := config.cache.Get(key)
+			if !reflect.DeepEqual(oldValue, value) {
+				changes[key] = createModifyConfigChange(oldValue, value)
 			}
+		}
 
-			if err := config.cache.Set(key, value, expireTime); err != nil {
-				log.Errorf("set key %s to cache error %s", key, err)
-			}
-			delete(mp, key)
+		if err := config.cache.Set(key, value, expireTime); err != nil {
+			log.Errorf("set key %s to cache error %s", key, err)
 		}
+		delete(mp, key)
 	}
 
 	// remove del keys