diff --git a/app.go b/app.go
index 9180f9d..0521ed4 100644
--- a/app.go
+++ b/app.go
@@ -9,6 +9,10 @@ import (
 	"q5"
 )
 
+type F5App interface {
+	GetPkgName() string
+}
+
 type UserApp interface {
 	GetPkgName() string
 	Init()
@@ -16,7 +20,7 @@ type UserApp interface {
 	UnInit()
 }
 
-type F5App struct {
+type app struct {
 	nodeId int
 	instanceId int
 	terminated bool
@@ -39,7 +43,7 @@ type F5App struct {
 	userApp UserApp
 }
 
-func (this *F5App) init(userApp UserApp) {
+func (this *app) init(userApp UserApp) {
 	this.userApp = userApp
 	this.nowTime = time.Now()
 	atomic.StoreInt64(&this.nowUnixNano, this.nowTime.UnixNano())
@@ -71,14 +75,14 @@ func (this *F5App) init(userApp UserApp) {
 	this.userApp.Init()
 }
 
-func (this *F5App) unInit() {
+func (this *app) unInit() {
 	this.chGoLoopTimerExit <- 1
 	_Timer.UnInit()
 	_Timer = nil
 	this.userApp.UnInit()
 }
 
-func (this *F5App) run() {
+func (this *app) run() {
 	for !this.terminated {
 		this.nowTime = time.Now()
 		atomic.StoreInt64(&this.nowUnixNano, this.nowTime.UnixNano())
@@ -96,32 +100,32 @@ func (this *F5App) run() {
 	}
 }
 
-func (this *F5App) NewUuid() int64 {
+func (this *app) NewUuid() int64 {
 	return 0
 }
 
-func (this *F5App) GetInstanceId() uint32 {
+func (this *app) GetInstanceId() uint32 {
 	return uint32(this.instanceId)
 }
 
-func (this *F5App) GetNodeId() uint32 {
+func (this *app) GetNodeId() uint32 {
 	return uint32(this.nodeId)
 }
 
-func (this *F5App) GetPkgName() string {
+func (this *app) GetPkgName() string {
 	return this.pkgName
 }
 
-func (this *F5App) SetPkgName(pkgName string) {
+func (this *app) SetPkgName(pkgName string) {
 	this.pkgName = pkgName
 }
 
-func (this *F5App) HasFlag(flag int32) bool {
+func (this *app) HasFlag(flag int32) bool {
 	_, ok := this.flags[flag]
 	return ok
 }
 
-func (this *F5App) AddIMMsg(msgId int16, params q5.Args) {
+func (this *app) AddIMMsg(msgId int16, params q5.Args) {
 	p := new(IMMsgNode)
 	p.msgId = msgId
 	p.params = params
@@ -139,11 +143,11 @@ func (this *F5App) AddIMMsg(msgId int16, params q5.Args) {
 	this.loopCond.Broadcast()
 }
 
-func (this *F5App) RegisterIMMsgHandle(msgId int16, handle func(int16,q5.Args)) {
+func (this *app) RegisterIMMsgHandle(msgId int16, handle func(int16,q5.Args)) {
 	this.imMsgHandlers[msgId] = handle
 }
 
-func (this *F5App) goLoopTimer() {
+func (this *app) goLoopTimer() {
 	var waitMs int64 = 1000 * 10
 	for {
 		select {
@@ -160,33 +164,33 @@ func (this *F5App) goLoopTimer() {
 	}
 }
 
-func (this *F5App) schedule() {
+func (this *app) schedule() {
 	this.chGoLoopWait <- Timer().GetIdleTime()
 	this.loopCond.L.Lock()
 	this.loopCond.Wait()
 	this.loopCond.L.Unlock()
 }
 
-func (this *F5App) NotifyLoopCond() {
+func (this *app) NotifyLoopCond() {
 	this.loopCond.Broadcast()
 }
 
-func (this *F5App) NowUnix() int64 {
+func (this *app) NowUnix() int64 {
 	return this.nowUnixNano / int64(time.Second)
 }
 
-func (this *F5App) NowUnixMilli() int64 {
+func (this *app) NowUnixMilli() int64 {
 	return this.nowUnixNano / int64(time.Millisecond)
 }
 
-func (this *F5App) NowUnixNano() int64 {
+func (this *app) NowUnixNano() int64 {
 	return this.nowUnixNano
 }
 
-func (this *F5App) outputRuningLog() {
+func (this *app) outputRuningLog() {
 }
 
-func (this *F5App) dispatchIMMsg() {
+func (this *app) dispatchIMMsg() {
 	this.imMsgMutex.Lock()
 	this.imWorkNode = this.imTopNode
 	this.imTopNode = nil
@@ -202,15 +206,15 @@ func (this *F5App) dispatchIMMsg() {
 	}
 }
 
-func (this *F5App) installTimer() {
+func (this *app) installTimer() {
 	Timer().SetInterval(1000 * 60,
 		func (ev int32, params *q5.Args) {
 			if ev == q5.TIMER_EXEC_EVENT {
 				SysLog().Info("max_run_delay:%d max_schedule_time:%d",
-					App().maxRunDelay,
-					App().maxScheduleTime)
-				App().maxRunDelay = 0
-				App().maxScheduleTime = 0
+					_app.maxRunDelay,
+					_app.maxScheduleTime)
+				_app.maxRunDelay = 0
+				_app.maxScheduleTime = 0
 			}
 		})
 }
diff --git a/global.go b/global.go
index 4c7bb3b..eeb42a7 100644
--- a/global.go
+++ b/global.go
@@ -2,7 +2,7 @@ package f5
 
 import "q5"
 
-var app *F5App
+var _app *app
 var _Timer *q5.XTimer
 var _SysLog *SysLog_
 var _TgLog *TGLog_
@@ -19,13 +19,13 @@ func TgLog() *TGLog_ {
 	return _TgLog
 }
 
-func App() *F5App {
-	return app
+func GetApp() F5App {
+	return _app
 }
 
 func Run(userApp UserApp) {
-	app = new(F5App)
-	app.init(userApp)
-	app.run()
-	app.unInit()
+	_app = new(app)
+	_app.init(userApp)
+	_app.run()
+	_app.unInit()
 }
diff --git a/syslog.go b/syslog.go
index fe9fae5..eaaf25a 100644
--- a/syslog.go
+++ b/syslog.go
@@ -125,7 +125,7 @@ func (this *SysLog_) goSaveToFile() {
 		this.botNode = nil
 		this.msgMutex.Unlock()
 		if workNode != nil {
-			logDir := fmt.Sprintf(SYS_LOG_ROOT, App().GetPkgName())
+			logDir := fmt.Sprintf(SYS_LOG_ROOT, GetApp().GetPkgName())
 			fileName := fmt.Sprintf(TGLOG_FILENAME, os.Getpid(), time.Now().Format("20060102"))
 			q5.ForceCreateDir(logDir)
 			if f, err := os.OpenFile(logDir + fileName, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0666); err == nil {