chore: fix clippy

src/main.rs

@@ -1,244 +1,44 @@
 #[macro_use] extern crate lazy_static;
 #[macro_use] extern crate rust_util;
 
+mod types;
+mod msg;
+mod slash_handles;
+
 use std::env;
 use std::io::Error as IoError;
 use std::collections::{HashMap, BTreeMap};
 use std::net::SocketAddr;
-use std::sync::{Arc, Mutex};
+use std::sync::Mutex;
-use futures_channel::mpsc::{unbounded, UnboundedSender};
+use futures_channel::mpsc::unbounded;
 use futures_util::{future, pin_mut, stream::TryStreamExt, StreamExt};
 use tokio::net::{TcpListener, TcpStream};
 use tungstenite::protocol::Message;
 use rust_util::XResult;
-use serde::{Deserialize, Serialize};
+use crate::types::{PeerMap, RoomMap, Tx};
-
+use crate::msg::{RoomMessageDown, RoomMessage, RoomMessageType, RoomMessageDownType};
-type Tx = UnboundedSender<Message>;
+use crate::slash_handles::{HandleContext, HandleTextMessage};
-type PeerMap = Arc<Mutex<HashMap<SocketAddr, Tx>>>;
+use crate::slash_handles::{HandleTextMessageExit, HandleTextMessageStatics};
-type RoomMap = Arc<Mutex<BTreeMap<String, BTreeMap<String, SocketAddr>>>>;
+use crate::slash_handles::{HandleTextMessagePass, HandleTextMessageRoom};
+use crate::slash_handles::{HandleTextMessageRooms, HandleTextMessageVersion};
 
 const NAME: &str = env!("CARGO_PKG_NAME");
 const VERSION: &str = env!("CARGO_PKG_VERSION");
 
-#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
-enum RoomMessageType {
-    #[serde(rename = "Enter")]
-    CreateOrEnter,
-    Exit,
-    Destroy,
-    ListPeers,
-    Broadcast,
-    Peer,
-}
-
-#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
-enum RoomMessageDownType {
-    PeerEnter,
-    PeerExit,
-    PeerList,
-    PeerMessage,
-    BroadcastMessage,
-    ReplyMessage,
-}
-
-impl Default for RoomMessageDownType {
-    fn default() -> Self {
-        Self::ReplyMessage
-    }
-}
-
-#[derive(Clone, Debug, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-struct RoomMessage {
-    r#type: RoomMessageType,
-    room_id: Option<String>,
-    client_id: Option<String>,
-    peer_id: Option<String>,
-    data: Option<String>,
-}
-
-#[derive(Clone, Debug, Default, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-struct RoomMessageDown {
-    r#type: RoomMessageDownType,
-    peer_id: Option<String>,
-    reply_code: Option<i32>,
-    reply_message: Option<String>,
-    data: Option<String>,
-}
-
-impl RoomMessageDown {
-    fn create_error_reply<S>(error_message: S) -> Self where S: Into<String> {
-        Self {
-            r#type: RoomMessageDownType::ReplyMessage,
-            reply_code: Some(500),
-            reply_message: Some(error_message.into()),
-            ..Default::default()
-        }
-    }
-    fn create_success_reply<S>(success_message: S) -> Self where S: Into<String> {
-        Self {
-            r#type: RoomMessageDownType::ReplyMessage,
-            reply_code: Some(200),
-            reply_message: Some(success_message.into()),
-            ..Default::default()
-        }
-    }
-    fn create_peer_enter<S>(peer_id: S) -> Self where S: Into<String> {
-        let peer_id = peer_id.into();
-        Self {
-            r#type: RoomMessageDownType::PeerEnter,
-            reply_code: Some(200),
-            reply_message: Some(format!("Peer {} entered", peer_id)),
-            peer_id: Some(peer_id),
-            ..Default::default()
-        }
-    }
-
-    fn send(&self, tx: &Tx) {
-        if let Ok(mm) = serde_json::to_string(self) {
-            tx.unbounded_send(Message::Text(mm)).ok();
-        }
-    }
-}
-
-#[derive(Debug, Clone)]
-struct HandleContext {
-    peer_map: PeerMap,
-    room_map: RoomMap,
-    admin_pass: Option<String>,
-    is_admin: bool,
-    room_id: Option<String>,
-    client_id: Option<String>,
-}
-
 lazy_static! {
     static ref TEXT_MESSAGE_HANDLES: Vec<Box<dyn HandleTextMessage>>= {
-        let mut handles:Vec<Box<dyn HandleTextMessage>> = vec![];
+        let handles:Vec<Box<dyn HandleTextMessage>> = vec![
-        handles.push(Box::new(HandleTextMessageExit));
+            Box::new(HandleTextMessageExit),
-        handles.push(Box::new(HandleTextMessageStatics));
+            Box::new(HandleTextMessageStatics),
-        handles.push(Box::new(HandleTextMessagePass));
+            Box::new(HandleTextMessagePass),
-        handles.push(Box::new(HandleTextMessageRooms));
+            Box::new(HandleTextMessageRooms),
-        handles.push(Box::new(HandleTextMessageRoom));
+            Box::new(HandleTextMessageRoom),
-        handles.push(Box::new(HandleTextMessageVersion));
+            Box::new(HandleTextMessageVersion),
+        ];
         handles
     };
 }
 
-trait HandleTextMessage: Sync {
-    fn is_matches(&self, handle_context: &mut HandleContext, tx: &Tx, addr: SocketAddr, msg: &str) -> bool;
-    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, addr: SocketAddr, msg: &str);
-}
-
-struct HandleTextMessageExit;
-impl HandleTextMessage for HandleTextMessageExit {
-    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
-        msg == "/exit"
-    }
-
-    fn handle(&self, _handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
-        tx.unbounded_send(Message::Close(None)).ok();
-    }
-}
-
-struct HandleTextMessageStatics;
-impl HandleTextMessage for HandleTextMessageStatics {
-    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
-        msg == "/statics"
-    }
-
-    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
-        tx.unbounded_send(Message::Text(
-            format!(
-                "room count: {}\npeer count: {}",
-                handle_context.room_map.lock().unwrap().len(),
-                handle_context.peer_map.lock().unwrap().len(),
-            )
-        )).ok();
-    }
-}
-
-struct HandleTextMessagePass;
-impl HandleTextMessage for HandleTextMessagePass {
-    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
-        msg.starts_with("/pass ")
-    }
-
-    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, msg: &str) {
-        let pass = &msg[6..];
-        if let Some(admin_pass) = &handle_context.admin_pass {
-            if admin_pass == pass {
-                handle_context.is_admin = true;
-                tx.unbounded_send(Message::Text("Admin password success".into())).ok();
-            } else {
-                tx.unbounded_send(Message::Text("Admin password error".into())).ok();
-            }
-        }
-    }
-}
-
-struct HandleTextMessageRooms;
-impl HandleTextMessage for HandleTextMessageRooms {
-    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
-        msg == "/rooms"
-    }
-
-    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
-        if !handle_context.is_admin {
-            RoomMessageDown::create_error_reply("Not admin").send(tx);
-            return;
-        }
-        let rooms = handle_context.room_map.lock().unwrap().keys().map(
-            |k| k.clone()
-        ).collect::<Vec<_>>().join("\n");
-        if rooms.is_empty() {
-            tx.unbounded_send(Message::Text("rooms: <empty>".into())).ok();
-        } else {
-            tx.unbounded_send(Message::Text(format!("rooms:\n{}", rooms))).ok();
-        }
-    }
-}
-
-struct HandleTextMessageRoom;
-impl HandleTextMessage for HandleTextMessageRoom {
-    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
-        msg.starts_with("/room ")
-    }
-
-    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, msg: &str) {
-        if !handle_context.is_admin {
-            RoomMessageDown::create_error_reply("Not admin").send(tx);
-            return;
-        }
-        let room_id = &msg[6..];
-        let room_map = handle_context.room_map.lock().unwrap();
-        let mut client_ids = vec![];
-        if let Some(client_map) = room_map.get(room_id) {
-            for peer_client_id in client_map.keys() {
-                client_ids.push(peer_client_id.clone());
-            }
-            tx.unbounded_send(Message::Text(format!("clients in room {}:\n{}", room_id, client_ids.join("\n")))).ok();
-        } else {
-            tx.unbounded_send(Message::Text(format!("room not found: {}", room_id))).ok();
-        }
-    }
-}
-
-struct HandleTextMessageVersion;
-impl HandleTextMessage for HandleTextMessageVersion {
-    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
-        msg == "/version"
-    }
-
-    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
-        if !handle_context.is_admin {
-            RoomMessageDown::create_error_reply("Not admin").send(tx);
-            return;
-        }
-        tx.unbounded_send(Message::Text(format!("{} - v{}", NAME, VERSION))).ok();
-    }
-}
-
 fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: SocketAddr, msg: String) {
     // process all registered handles
     if msg.starts_with('/') {
@@ -261,8 +61,9 @@ fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: Socket
         RoomMessageType::CreateOrEnter => {
             if let (Some(room_id), Some(client_id)) = (&handle_context.room_id, &handle_context.client_id) {
                 warning!("Client is already in room: {:?} - {:?}", room_id, client_id);
-                RoomMessageDown::create_error_reply("Client is already in room").send(&tx);
+                RoomMessageDown::create_error_reply("Client is already in room").send(tx);
-            } else {
+                return;
+            }
             if let (Some(msg_room_id), Some(msg_client_id)) = (room_message.room_id, room_message.client_id) {
                 let mut room_map = handle_context.room_map.lock().unwrap();
                 match room_map.get_mut(&msg_room_id) {
@@ -271,7 +72,7 @@ fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: Socket
                             Some(peer_addr) => {
                                 if peer_addr == &addr {
                                     information!("Duplicate enter to room: {:?} - {:?}", msg_room_id, msg_client_id);
-                                        RoomMessageDown::create_success_reply("Duplicate enter to room").send(&tx);
+                                    RoomMessageDown::create_success_reply("Duplicate enter to room").send(tx);
                                 } else {
                                     information!(
                                         "Replace client: {:?} - {:?}, from {:?} -> {:?}",
@@ -282,7 +83,7 @@ fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: Socket
                                         tx.unbounded_send(Message::Close(None)).ok();
                                     }
                                     client_map.insert(msg_client_id.clone(), addr);
-                                        RoomMessageDown::create_success_reply(client_replaced_message).send(&tx);
+                                    RoomMessageDown::create_success_reply(client_replaced_message).send(tx);
                                 }
                             },
                             None => {
@@ -299,7 +100,7 @@ fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: Socket
                                         }
                                     }
                                 }
-                                    RoomMessageDown::create_success_reply(format!("Client entered: {:?}", addr)).send(&tx);
+                                RoomMessageDown::create_success_reply(format!("Client entered: {:?}", addr)).send(tx);
                             },
                         }
                     },
@@ -308,14 +109,13 @@ fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: Socket
                         let mut client_map = BTreeMap::new();
                         client_map.insert(msg_client_id.clone(), addr);
                         room_map.insert(msg_room_id.clone(), client_map);
-                            RoomMessageDown::create_success_reply(format!("Client create room: {:?}", addr)).send(&tx);
+                        RoomMessageDown::create_success_reply(format!("Client create room: {:?}", addr)).send(tx);
                     },
                 }
                 handle_context.room_id = Some(msg_room_id);
                 handle_context.client_id = Some(msg_client_id);
             } else {
-                    RoomMessageDown::create_error_reply("Room id and client id must both assigned").send(&tx);
+                RoomMessageDown::create_error_reply("Room id and client id must both assigned").send(tx);
-                }
             }
         },
         RoomMessageType::Exit => {
@@ -355,7 +155,7 @@ fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: Socket
                 let client_map = room_map.get(room_id);
                 let mut client_ids = vec![];
                 if let Some(client_map) = client_map {
-                    for (client_id, _client_addr) in client_map {
+                    for client_id in client_map.keys() {
                         client_ids.push(client_id.clone());
                     }
                 }
@@ -425,11 +225,11 @@ fn handle_text_message(handle_context: &mut HandleContext, tx: &Tx, addr: Socket
                         if let Some(client_map) = client_map {
                             if let Some(peer_client_addr) = client_map.get(peer_id) {
                                 if let Some(peer_tx) = handle_context.peer_map.lock().unwrap().get(peer_client_addr) {
-                                    peer_tx.unbounded_send(Message::Text(mm.clone())).ok();
+                                    peer_tx.unbounded_send(Message::Text(mm)).ok();
                                 }
-                                RoomMessageDown::create_success_reply(format!("Message sent to: {}", peer_id)).send(&tx);
+                                RoomMessageDown::create_success_reply(format!("Message sent to: {}", peer_id)).send(tx);
                             } else {
-                                RoomMessageDown::create_error_reply(format!("Peer not found: {}", peer_id)).send(&tx);
+                                RoomMessageDown::create_error_reply(format!("Peer not found: {}", peer_id)).send(tx);
                             }
                         }
                     }
@@ -472,7 +272,7 @@ async fn inner_handle_connection(
             Message::Pong(_) => {},
             Message::Binary(_) => {
                 warning!("Ignore binary message from: {:?} - {:?}", handle_context.room_id, handle_context.client_id);
-                RoomMessageDown::create_error_reply("binary not supported").send(&tx);
+                RoomMessageDown::create_error_reply("Binary message not supported").send(&tx);
             },
             Message::Text(msg) => {
                 if !msg.is_empty() {
@@ -534,7 +334,7 @@ async fn main() -> Result<(), IoError> {
 
     // Create the event loop and TCP listener we'll accept connections on.
     let try_socket = TcpListener::bind(&listen_addr).await;
-    let listener = try_socket.expect(&format!("Failed to bind ok: {}", listen_addr));
+    let listener = try_socket.unwrap_or_else(|_| panic!("Failed to bind ok: {}", listen_addr));
     success!("Listening on: {}", listen_addr);
 
     // Let's spawn the handling of each connection in a separate task.

src/msg.rs

@@ -0,0 +1,85 @@
+use tungstenite::Message;
+use serde::{Deserialize, Serialize};
+use crate::types::Tx;
+
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
+pub enum RoomMessageType {
+    #[serde(rename = "Enter")]
+    CreateOrEnter,
+    Exit,
+    Destroy,
+    ListPeers,
+    Broadcast,
+    Peer,
+}
+
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
+pub enum RoomMessageDownType {
+    PeerEnter,
+    PeerExit,
+    PeerList,
+    PeerMessage,
+    BroadcastMessage,
+    ReplyMessage,
+}
+
+impl Default for RoomMessageDownType {
+    fn default() -> Self {
+        Self::ReplyMessage
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RoomMessage {
+    pub r#type: RoomMessageType,
+    pub room_id: Option<String>,
+    pub client_id: Option<String>,
+    pub peer_id: Option<String>,
+    pub data: Option<String>,
+}
+
+#[derive(Clone, Debug, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RoomMessageDown {
+    pub r#type: RoomMessageDownType,
+    pub peer_id: Option<String>,
+    pub reply_code: Option<i32>,
+    pub reply_message: Option<String>,
+    pub data: Option<String>,
+}
+
+impl RoomMessageDown {
+    pub fn create_error_reply<S>(error_message: S) -> Self where S: Into<String> {
+        Self {
+            r#type: RoomMessageDownType::ReplyMessage,
+            reply_code: Some(500),
+            reply_message: Some(error_message.into()),
+            ..Default::default()
+        }
+    }
+    pub fn create_success_reply<S>(success_message: S) -> Self where S: Into<String> {
+        Self {
+            r#type: RoomMessageDownType::ReplyMessage,
+            reply_code: Some(200),
+            reply_message: Some(success_message.into()),
+            ..Default::default()
+        }
+    }
+    pub fn create_peer_enter<S>(peer_id: S) -> Self where S: Into<String> {
+        let peer_id = peer_id.into();
+        Self {
+            r#type: RoomMessageDownType::PeerEnter,
+            reply_code: Some(200),
+            reply_message: Some(format!("Peer {} entered", peer_id)),
+            peer_id: Some(peer_id),
+            ..Default::default()
+        }
+    }
+
+    pub fn send(&self, tx: &Tx) {
+        if let Ok(mm) = serde_json::to_string(self) {
+            tx.unbounded_send(Message::Text(mm)).ok();
+        }
+    }
+}

src/slash_handles.rs

@@ -0,0 +1,127 @@
+use crate::types::{PeerMap, RoomMap, Tx};
+use std::net::SocketAddr;
+use tungstenite::Message;
+use crate::msg::RoomMessageDown;
+use crate::{NAME, VERSION};
+
+#[derive(Debug, Clone)]
+pub struct HandleContext {
+    pub peer_map: PeerMap,
+    pub room_map: RoomMap,
+    pub admin_pass: Option<String>,
+    pub is_admin: bool,
+    pub room_id: Option<String>,
+    pub client_id: Option<String>,
+}
+
+pub trait HandleTextMessage: Sync {
+    fn is_matches(&self, handle_context: &mut HandleContext, tx: &Tx, addr: SocketAddr, msg: &str) -> bool;
+    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, addr: SocketAddr, msg: &str);
+}
+
+pub struct HandleTextMessageExit;
+impl HandleTextMessage for HandleTextMessageExit {
+    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
+        msg == "/exit"
+    }
+
+    fn handle(&self, _handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
+        tx.unbounded_send(Message::Close(None)).ok();
+    }
+}
+
+pub struct HandleTextMessageStatics;
+impl HandleTextMessage for HandleTextMessageStatics {
+    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
+        msg == "/statics"
+    }
+
+    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
+        tx.unbounded_send(Message::Text(
+            format!(
+                "room count: {}\npeer count: {}",
+                handle_context.room_map.lock().unwrap().len(),
+                handle_context.peer_map.lock().unwrap().len(),
+            )
+        )).ok();
+    }
+}
+
+pub struct HandleTextMessagePass;
+impl HandleTextMessage for HandleTextMessagePass {
+    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
+        msg.starts_with("/pass ")
+    }
+
+    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, msg: &str) {
+        let pass = &msg[6..];
+        if let Some(admin_pass) = &handle_context.admin_pass {
+            if admin_pass == pass {
+                handle_context.is_admin = true;
+                tx.unbounded_send(Message::Text("Admin password success".into())).ok();
+            } else {
+                tx.unbounded_send(Message::Text("Admin password error".into())).ok();
+            }
+        }
+    }
+}
+
+pub struct HandleTextMessageRooms;
+impl HandleTextMessage for HandleTextMessageRooms {
+    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
+        msg == "/rooms"
+    }
+
+    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
+        if !handle_context.is_admin {
+            RoomMessageDown::create_error_reply("Not admin").send(tx);
+            return;
+        }
+        let rooms = handle_context.room_map.lock().unwrap().keys().cloned().collect::<Vec<_>>().join("\n");
+        if rooms.is_empty() {
+            tx.unbounded_send(Message::Text("rooms: <empty>".into())).ok();
+        } else {
+            tx.unbounded_send(Message::Text(format!("rooms:\n{}", rooms))).ok();
+        }
+    }
+}
+
+pub struct HandleTextMessageRoom;
+impl HandleTextMessage for HandleTextMessageRoom {
+    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
+        msg.starts_with("/room ")
+    }
+
+    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, msg: &str) {
+        if !handle_context.is_admin {
+            RoomMessageDown::create_error_reply("Not admin").send(tx);
+            return;
+        }
+        let room_id = &msg[6..];
+        let room_map = handle_context.room_map.lock().unwrap();
+        let mut client_ids = vec![];
+        if let Some(client_map) = room_map.get(room_id) {
+            for peer_client_id in client_map.keys() {
+                client_ids.push(peer_client_id.clone());
+            }
+            tx.unbounded_send(Message::Text(format!("clients in room {}:\n{}", room_id, client_ids.join("\n")))).ok();
+        } else {
+            tx.unbounded_send(Message::Text(format!("room not found: {}", room_id))).ok();
+        }
+    }
+}
+
+pub struct HandleTextMessageVersion;
+impl HandleTextMessage for HandleTextMessageVersion {
+    fn is_matches(&self, _handle_context: &mut HandleContext, _tx: &Tx, _addr: SocketAddr, msg: &str) -> bool {
+        msg == "/version"
+    }
+
+    fn handle(&self, handle_context: &mut HandleContext, tx: &Tx, _addr: SocketAddr, _msg: &str) {
+        if !handle_context.is_admin {
+            RoomMessageDown::create_error_reply("Not admin").send(tx);
+            return;
+        }
+        tx.unbounded_send(Message::Text(format!("{} - v{}", NAME, VERSION))).ok();
+    }
+}

src/types.rs

@@ -0,0 +1,9 @@
+use futures_channel::mpsc::UnboundedSender;
+use tungstenite::Message;
+use std::net::SocketAddr;
+use std::collections::{HashMap, BTreeMap};
+use std::sync::{Mutex, Arc};
+
+pub type Tx = UnboundedSender<Message>;
+pub type PeerMap = Arc<Mutex<HashMap<SocketAddr, Tx>>>;
+pub type RoomMap = Arc<Mutex<BTreeMap<String, BTreeMap<String, SocketAddr>>>>;