尝试使用事件机制来实现多线程沟通+1

src/events.rs

-use crate::handles::online_users_update::send_online_users_resp;
+use crate::handles::online_users_update::{send_online_users_resp};
+use crate::typing::used_typed::Connection;
 use tokio::sync::mpsc;
+use std::collections::HashMap;
+use std::sync::Arc;
+use tokio::sync::RwLock;
+use futures::SinkExt;
+use lazy_static::lazy_static;
+use tungstenite::{Error, Message};
 
 // 假设的用户详细信息结构体
 #[derive(Debug)]
@@ -15,35 +22,69 @@ pub enum Event {
     UpdateOnlineUsers,
 }
 
+// 定义事件中心发送给客户端的消息类型
+#[derive(Debug)]
+pub enum ClientMessage {
+    CmdUpdateOnlineUsers,
+    SendMessage(String),
+}
+
+lazy_static! {
+    // 存储每个客户端的发送者，用于事件中心向客户端发送消息
+    pub static ref CLIENT_SENDERS: Arc<RwLock<HashMap<String, mpsc::Sender<ClientMessage>>>> =
+        Arc::new(RwLock::new(HashMap::new()));
+}
+
+// 注册客户端的发送者
+pub async fn register_client(_event_sender: mpsc::UnboundedSender<Event>, center_to_client_sender: mpsc::Sender<ClientMessage>) {
+    // 这里假设可以从某个地方获取到客户端的 from_id
+    let from_id = "dummy_id".to_string(); // 实际需要替换为真实的 from_id
+    let mut senders = CLIENT_SENDERS.write().await;
+    senders.insert(from_id, center_to_client_sender);
+}
+
 // 处理事件的任务
 pub async fn handle_events(mut receiver: mpsc::UnboundedReceiver<Event>) {
     while let Some(event) = receiver.recv().await {
         match event {
             Event::NewConnection(from_id) => {
                 println!("新连接: {}", from_id);
-                // 这里假设在其他地方有获取所有连接发送器的逻辑，暂时省略
-                // 实际应用中，需要实现向所有连接发送消息的功能
-                if let Err(e) = send_online_users_resp().await {
-                    println!(
-                        "在处理新用户id {} 之时广播，处理在线用户列表出错了：{:?}",
-                        &from_id, e
-                    );
-                }
+
             }
             Event::CloseConnection(from_id) => {
                 println!("关闭连接: {}", from_id);
-                if let Err(e) = send_online_users_resp().await {
-                    println!(
-                        "在处理新用户id {} 之时广播，处理在线用户列表出错了：{:?}",
-                        &from_id, e
-                    );
-                }
+
+                // 移除客户端的发送者
+                let mut senders = CLIENT_SENDERS.write().await;
+                senders.remove(&from_id);
             }
             Event::UpdateOnlineUsers => {
                 // 这里可以实现其他触发更新在线用户列表的逻辑
                 // 为简单起见，暂未详细实现
                 println!("更新在线用户列表事件触发");
+
+            }
+        }
+    }
+}
+
+// 向指定客户端发送消息
+async fn send_message_to_client(from_id: &str, message: String) -> Result<(), Error> {
+    let senders = CLIENT_SENDERS.read().await;
+    if let Some(sender) = senders.get(from_id) {
+        if let Err(e) = sender.send(ClientMessage::SendMessage(message)).await {
+            return Err(Error::Io(std::io::Error::new(std::io::ErrorKind::Other, e)));
+        }
     }
+    Ok(())
+}
+
+// 通知所有客户端线程发送 CmdUpdateOnlineUsers 消息
+async fn notify_all_clients_to_update_online_users() {
+    let senders = CLIENT_SENDERS.read().await;
+    for (_, sender) in senders.iter() {
+        if let Err(e) = sender.send(ClientMessage::CmdUpdateOnlineUsers).await {
+            println!("通知客户端更新在线用户列表失败: {:?}", e);
         }
     }
 }
\ No newline at end of file

src/handles/close_connection.rs

+use crate::events::Event;
 use crate::handles::online_users_update::send_online_users_resp;
 use crate::handles::redis::remove_this_connection;
-use crate::typing::used_typed::{ConnectionMap};
-use tokio::sync::RwLockWriteGuard;
+use tokio::sync::mpsc::UnboundedSender;
 
 pub async fn handle_connection_error(
     from_id: &str,
-    connections: &ConnectionMap,
+    event_sender: &UnboundedSender<Event>,
 ) {
     println!("开始处理用户id: {} 的连接错误", from_id);
-    // 从全局连接映射中移除该连接
-    let removed = {
-        let mut connections: RwLockWriteGuard<'_, _> = connections.write().await;
-        println!("清除之前的keys {:?}", connections.keys());
-        let result = connections.remove(from_id).is_some();
-        println!("清除之后的keys {:?}", connections.keys());
-        result
-    };
 
-    println!(
-        "是否成功从全局连接映射中移除用户id: {}，结果: {}",
-        from_id, removed
-    );
+    // 发送关闭连接事件
+    event_sender.send(Event::CloseConnection(from_id.to_string())).unwrap();
 
     // 从 Redis 中移除该用户的信息
-    if removed {
     if let Err(e) = remove_this_connection(from_id).await {
         println!("从 Redis 中移除用户信息时出错: {}", e);
     }
-    }
 
     // 准备更新用户链接
     if let Err(e) = send_online_users_resp().await {
-        println!("在处理新用户id {} 之时广播，处理在线用户列表出错了：{:?}", &from_id,e);
+        println!("在处理新用户id {} 之时广播，处理在线用户列表出错了：{:?}", from_id, e);
     } else {
-        println!("成功将用户id {} 退出广播至其余用户", &from_id);
+        println!("成功将用户id {} 退出广播至其余用户", from_id);
     }
 }
\ No newline at end of file

src/handles/online_users_update.rs

-use crate::client::{CONNECTIONS, ONLINE_USERS};
+use crate::client::ONLINE_USERS;
 use crate::utils::json_utils::get_current_timestamp;
-use futures::SinkExt;
 use serde::{Deserialize, Serialize};
-use tungstenite::{Error, Message};
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct OnlineUserMessage {
@@ -42,13 +40,14 @@ pub struct OnlineUsersMessage {
     pub time: u128,
 }
 
-
-pub async fn send_online_users_resp() -> Result<(), Error> {
+pub async fn send_online_users_resp() -> Result<Vec<(String, String)>, serde_json::Error> {
     let mut msg_data = Vec::new();
+    let mut user_ids = Vec::new();
+
     {
         let online_users = ONLINE_USERS.read().await;
         println!("当前所有用户数据信息 ONLINE_USERS: {:?}", online_users);
-        for (_, user_info_str) in online_users.iter() {
+        for (user_id, user_info_str) in online_users.iter() {
             let parts: Vec<&str> = user_info_str.split(',').collect();
             if parts.len() == 9 {
                 let user_msg = OnlineUserMessage {
@@ -63,14 +62,14 @@ pub async fn send_online_users_resp() -> Result<(), Error> {
                     from_name: parts[8].to_string(),
                 };
                 msg_data.push(user_msg);
+                user_ids.push(user_id.clone());
             }
         }
     }
 
-    let mut connections = CONNECTIONS.write().await;
-    println!("当前的connections的keys是 {:?}", connections.keys());
-    for (from_id, connection) in connections.iter_mut() {
-        let to_id = from_id.to_string();
+    let mut messages = Vec::new();
+    for user_id in user_ids {
+        let to_id = user_id.clone();
         let message = OnlineUsersMessage {
             msg_type: "CmdUpdateOnlineUsers".to_string(),
             from_id: "0".to_string(),
@@ -80,16 +79,9 @@ pub async fn send_online_users_resp() -> Result<(), Error> {
             time: get_current_timestamp(),
         };
 
-        let json_result = serde_json::to_string(&message);
-        if let Err(e) = json_result {
-            println!("序列化消息给用户 {} 失败: {}", from_id.to_string(), e);
-            continue;
+        let json = serde_json::to_string(&message)?;
+        messages.push((user_id, json));
     }
-        let json = json_result.unwrap();
 
-        if let Err(e) = connection.sender.send(Message::text(json)).await {
-            println!("发送消息给用户 {} 失败: {}", from_id.to_string(), e);
-        }
-    }
-    Ok(())
+    Ok(messages)
 }
\ No newline at end of file

src/main.rs

@@ -21,6 +21,11 @@ async fn main() {
     // 启动事件处理任务
     tokio::spawn(handle_events(event_receiver));
     while let Ok((stream, _)) = listener.accept().await {
-        tokio::spawn(handle_client(stream, event_sender.clone()));
+        let client_event_sender = event_sender.clone();
+        // 创建一个用于事件中心向客户端发送消息的通道
+        let (center_to_client_sender, center_to_client_receiver) = mpsc::channel(10);
+        tokio::spawn(handle_client(stream, &client_event_sender, center_to_client_receiver));
+        // 将客户端的发送者存储到事件中心，以便事件中心可以向客户端发送消息
+        events::register_client(client_event_sender, center_to_client_sender).await;
     }
 }
\ No newline at end of file

src/typing/used_typed.rs

-use std::collections::HashMap;
-use std::sync::{Arc, RwLock};
-use tokio::sync::RwLock as AsyncRwLock;
-use tokio::task::JoinHandle;
 use tokio_tungstenite::WebSocketStream;
 use tungstenite::Message;
 
@@ -11,6 +7,3 @@ pub struct Connection {
     pub(crate) sender: futures::stream::SplitSink<WebSocketStream<tokio::net::TcpStream>, Message>,
     pub(crate) receiver: futures::stream::SplitStream<WebSocketStream<tokio::net::TcpStream>>,
 }
\ No newline at end of file
-
-pub type ConnectionMap = Arc<AsyncRwLock<HashMap<String, Connection>>>;
-pub type TaskMap = Arc<RwLock<HashMap<String, JoinHandle<()>>>>;
\ No newline at end of file