feat: 同一会话消息排队顺序处理，不同会话互不影响

app/agent/__init__.py

@@ -2,7 +2,8 @@ import asyncio
 import traceback
 import uuid
 from time import strftime
-from typing import Callable, Dict, List
+from dataclasses import dataclass
+from typing import Callable, Dict, List, Optional
 
 from langchain.agents import create_agent
 from langchain.agents.middleware import (
@@ -321,13 +322,32 @@ class MoviePilotAgent:
         logger.info(f"MoviePilot智能体已清理: session_id={self.session_id}")
 
 
+@dataclass
+class _MessageTask:
+    """
+    待处理的消息任务
+    """
+
+    session_id: str
+    user_id: str
+    message: str
+    channel: Optional[str] = None
+    source: Optional[str] = None
+    username: Optional[str] = None
+
+
 class AgentManager:
     """
     AI智能体管理器
+    同一会话的消息按顺序排队处理，不同会话之间互不影响。
     """
 
     def __init__(self):
         self.active_agents: Dict[str, MoviePilotAgent] = {}
+        # 每个会话的消息队列
+        self._session_queues: Dict[str, asyncio.Queue] = {}
+        # 每个会话的worker任务
+        self._session_workers: Dict[str, asyncio.Task] = {}
 
     @staticmethod
     async def initialize():
@@ -341,6 +361,17 @@ class AgentManager:
         关闭管理器
         """
         await memory_manager.close()
+        # 取消所有会话worker
+        for task in self._session_workers.values():
+            task.cancel()
+        # 等待所有worker结束
+        for session_id, task in self._session_workers.items():
+            try:
+                await task
+            except asyncio.CancelledError:
+                pass
+        self._session_workers.clear()
+        self._session_queues.clear()
         for agent in self.active_agents.values():
             await agent.cleanup()
         self.active_agents.clear()
@@ -355,36 +386,133 @@ class AgentManager:
         username: str = None,
     ) -> str:
         """
-        处理用户消息
+        处理用户消息：将消息放入会话队列，按顺序依次处理。
+        同一会话的消息排队等待，不同会话之间互不影响。
         """
+        task = _MessageTask(
+            session_id=session_id,
+            user_id=user_id,
+            message=message,
+            channel=channel,
+            source=source,
+            username=username,
+        )
+
+        # 获取或创建会话队列
+        if session_id not in self._session_queues:
+            self._session_queues[session_id] = asyncio.Queue()
+
+        queue = self._session_queues[session_id]
+        queue_size = queue.qsize()
+
+        # 如果队列中已有等待的消息，通知用户消息已排队
+        if queue_size > 0 or (
+            session_id in self._session_workers
+            and not self._session_workers[session_id].done()
+        ):
+            logger.info(
+                f"会话 {session_id} 有任务正在处理，消息已排队等待 "
+                f"(队列中待处理: {queue_size} 条)"
+            )
+
+        # 放入队列
+        await queue.put(task)
+
+        # 确保该会话有一个worker在运行
+        if (
+            session_id not in self._session_workers
+            or self._session_workers[session_id].done()
+        ):
+            self._session_workers[session_id] = asyncio.create_task(
+                self._session_worker(session_id)
+            )
+
+        return ""
+
+    async def _session_worker(self, session_id: str):
+        """
+        会话消息处理worker：从队列中逐条取出消息并处理。
+        处理完当前消息后才会处理下一条，确保同一会话的消息顺序执行。
+        """
+        queue = self._session_queues.get(session_id)
+        if not queue:
+            return
+
+        try:
+            while True:
+                try:
+                    # 等待消息，超时后自动退出worker
+                    task = await asyncio.wait_for(queue.get(), timeout=60.0)
+                except asyncio.TimeoutError:
+                    # 队列空闲超时，退出worker
+                    logger.debug(f"会话 {session_id} 的消息队列空闲，worker退出")
+                    break
+
+                try:
+                    await self._process_message_internal(task)
+                except Exception as e:
+                    logger.error(f"处理会话 {session_id} 的消息失败: {e}")
+                finally:
+                    queue.task_done()
+
+        except asyncio.CancelledError:
+            logger.info(f"会话 {session_id} 的worker被取消")
+        finally:
+            # 清理已完成的worker记录
+            self._session_workers.pop(session_id, None)
+            # 如果队列为空，清理队列
+            if (
+                session_id in self._session_queues
+                and self._session_queues[session_id].empty()
+            ):
+                self._session_queues.pop(session_id, None)
+
+    async def _process_message_internal(self, task: _MessageTask):
+        """
+        实际处理单条消息
+        """
+        session_id = task.session_id
         if session_id not in self.active_agents:
             logger.info(
-                f"创建新的AI智能体实例，session_id: {session_id}, user_id: {user_id}"
+                f"创建新的AI智能体实例，session_id: {session_id}, user_id: {task.user_id}"
             )
             agent = MoviePilotAgent(
                 session_id=session_id,
-                user_id=user_id,
-                channel=channel,
-                source=source,
-                username=username,
+                user_id=task.user_id,
+                channel=task.channel,
+                source=task.source,
+                username=task.username,
             )
             self.active_agents[session_id] = agent
         else:
             agent = self.active_agents[session_id]
-            agent.user_id = user_id
-            if channel:
-                agent.channel = channel
-            if source:
-                agent.source = source
-            if username:
-                agent.username = username
+            agent.user_id = task.user_id
+            if task.channel:
+                agent.channel = task.channel
+            if task.source:
+                agent.source = task.source
+            if task.username:
+                agent.username = task.username
 
-        return await agent.process(message)
+        return await agent.process(task.message)
 
     async def clear_session(self, session_id: str, user_id: str):
         """
         清空会话
         """
+        # 取消该会话的worker
+        if session_id in self._session_workers:
+            self._session_workers[session_id].cancel()
+            try:
+                await self._session_workers[session_id]
+            except asyncio.CancelledError:
+                pass
+            self._session_workers.pop(session_id, None)
+
+        # 清理队列
+        self._session_queues.pop(session_id, None)
+
+        # 清理agent
         if session_id in self.active_agents:
             agent = self.active_agents[session_id]
             await agent.cleanup()
@@ -429,6 +557,17 @@ class AgentManager:
                 username=settings.SUPERUSER,
             )
 
+            # 等待消息队列处理完成
+            if session_id in self._session_queues:
+                await self._session_queues[session_id].join()
+
+            # 等待worker结束
+            if session_id in self._session_workers:
+                try:
+                    await self._session_workers[session_id]
+                except asyncio.CancelledError:
+                    pass
+
             logger.info("智能体心跳唤醒：任务检查完成")
 
             # 心跳会话用完即弃，清理资源