diff --git a/f9/src/app.rs b/f9/src/app.rs
index 22b0627..edeb90c 100644
--- a/f9/src/app.rs
+++ b/f9/src/app.rs
@@ -2,26 +2,23 @@ use std::rc::{Rc, Weak};
 use std::cell::RefCell;
 use std::time::Duration;
 use tokio::runtime::Runtime;
-use actix_web::{dev::ServerHandle,
-                rt,
-                web,
-                get,
-                web::Data,
-                HttpRequest,
-                HttpResponse,
-                HttpServer,
-                Responder};
-use actix_web::App as WebApp;
-use std::{sync::mpsc, thread};
-use std::sync::{Arc, Mutex, Condvar};
-use std::collections::HashMap;
+use actix_web::{
+    dev::ServerHandle,
+    rt,
+    web,
+    App as WebApp,
+    web::Data,
+    HttpRequest,
+    HttpResponse,
+    HttpServer,
+    Responder};
+use std::sync::{Arc, Mutex};
+//use std::collections::HashMap;
 use std::any::Any;
 
 use r9_macro::SharedFromSelf;
 use r9_macro_derive::SharedFromSelf;
 
-pub type HttpRequestCb = Rc::<dyn FnMut (HttpRequest)>;
-
 pub trait UserApp {
     fn get_pkg_name(&self) -> String;
     fn init(&mut self);
@@ -65,7 +62,7 @@ struct HttpContext {
 }
 
 async fn index(data: Data<Arc::<AppState>>, req: HttpRequest) -> impl Responder {
-    println!("http.thread.id {:?}", thread::current().id());
+    println!("http.thread.id {:?}", std::thread::current().id());
     let context = Arc::new(
         Mutex::new(HttpContext{
             id: 0,
@@ -89,7 +86,7 @@ async fn index(data: Data<Arc::<AppState>>, req: HttpRequest) -> impl Responder
 }
 
 async fn run_app(port: u16, app_state: Arc::<AppState>,
-                 tx: mpsc::Sender<ServerHandle>) -> std::io::Result<()> {
+                 tx: std::sync::mpsc::Sender<ServerHandle>) -> std::io::Result<()> {
     let server = HttpServer::new(move || {
         WebApp::new()
             .data(app_state.clone())
@@ -141,7 +138,7 @@ impl App {
     }
 
     pub fn init(&mut self, user_app: Rc::<RefCell::<dyn UserApp>>) {
-        println!("main.thread.id {:?}", thread::current().id());
+        println!("main.thread.id {:?}", std::thread::current().id());
         self.user_app = Some(user_app);
         self.tokio_rt.enter();
         self.init_http_server();
@@ -213,7 +210,7 @@ impl App {
 
     fn dispatch_immsg(&mut self) {
         {
-            self.im_mutex.lock();
+            let _ = self.im_mutex.lock();
             if !self.im_msgs.borrow().empty() {
                 r9::ListHead::replace_init(&self.im_msgs, &self.im_work_msgs);
             }
@@ -252,11 +249,11 @@ impl App {
     }
 
     fn init_http_server(&mut self) {
-        let (tx, _) = mpsc::channel();
+        let (tx, _) = std::sync::mpsc::channel();
 
         let port = self.user_app.as_ref().unwrap().borrow().get_http_listen_port() as u16;
         let app_state = self.webapp_state.clone();
-        thread::spawn(move || {
+        std::thread::spawn(move || {
             let server_future = run_app(port, app_state, tx);
             rt::System::new().block_on(server_future)
         });