687 lines
30 KiB
Python
687 lines
30 KiB
Python
"""
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异步会议服务 - 处理会议总结生成的异步任务
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采用FastAPI BackgroundTasks模式
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"""
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import uuid
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import time
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import os
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import re
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from datetime import datetime
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from typing import Optional, Dict, Any, List
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from pathlib import Path
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import redis
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from app.core.config import REDIS_CONFIG, TRANSCRIPTION_POLL_CONFIG, AUDIO_DIR
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from app.core.database import get_db_connection
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from app.services.async_transcription_service import AsyncTranscriptionService
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from app.services.llm_service import LLMService
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class AsyncMeetingService:
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"""异步会议服务类 - 处理会议相关的异步任务"""
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def __init__(self):
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# 确保redis客户端自动解码响应，代码更简洁
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if 'decode_responses' not in REDIS_CONFIG:
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REDIS_CONFIG['decode_responses'] = True
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self.redis_client = redis.Redis(**REDIS_CONFIG)
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self.llm_service = LLMService() # 复用现有的同步LLM服务
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def start_summary_generation(self, meeting_id: int, user_prompt: str = "", prompt_id: Optional[int] = None, model_code: Optional[str] = None) -> str:
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"""
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创建异步总结任务，任务的执行将由外部（如API层的BackgroundTasks）触发。
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Args:
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meeting_id: 会议ID
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user_prompt: 用户额外提示词
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prompt_id: 可选的提示词模版ID，如果不指定则使用默认模版
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model_code: 可选的LLM模型编码，如果不指定则使用默认模型
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Returns:
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str: 任务ID
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"""
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try:
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task_id = str(uuid.uuid4())
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# 在数据库中创建任务记录
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self._save_task_to_db(task_id, meeting_id, user_prompt, prompt_id)
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# 将任务详情存入Redis，用于快速查询状态
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current_time = datetime.now().isoformat()
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task_data = {
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'task_id': task_id,
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'meeting_id': str(meeting_id),
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'user_prompt': user_prompt,
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'prompt_id': str(prompt_id) if prompt_id else '',
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'model_code': model_code or '',
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'status': 'pending',
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'progress': '0',
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'created_at': current_time,
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'updated_at': current_time
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}
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self.redis_client.hset(f"llm_task:{task_id}", mapping=task_data)
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self.redis_client.expire(f"llm_task:{task_id}", 86400)
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return task_id
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except Exception as e:
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print(f"Error starting summary generation: {e}")
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raise e
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def _process_task(self, task_id: str):
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"""
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处理单个异步任务的函数，设计为由BackgroundTasks调用。
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"""
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print(f"Background task started for meeting summary task: {task_id}")
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try:
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# 从Redis获取任务数据
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task_data = self.redis_client.hgetall(f"llm_task:{task_id}")
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if not task_data:
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print(f"Error: Task {task_id} not found in Redis for processing.")
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return
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meeting_id = int(task_data['meeting_id'])
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user_prompt = task_data.get('user_prompt', '')
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prompt_id_str = task_data.get('prompt_id', '')
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prompt_id = int(prompt_id_str) if prompt_id_str and prompt_id_str != '' else None
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model_code = task_data.get('model_code', '') or None
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# 1. 更新状态为processing
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self._update_task_status_in_redis(task_id, 'processing', 10, message="任务已开始...")
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# 2. 获取会议转录内容
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self._update_task_status_in_redis(task_id, 'processing', 30, message="获取会议转录内容...")
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transcript_text = self._get_meeting_transcript(meeting_id)
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if not transcript_text:
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raise Exception("无法获取会议转录内容")
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# 3. 构建提示词
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self._update_task_status_in_redis(task_id, 'processing', 40, message="准备AI提示词...")
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full_prompt = self._build_prompt(meeting_id, transcript_text, user_prompt, prompt_id)
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# 4. 调用LLM API（支持指定模型）
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self._update_task_status_in_redis(task_id, 'processing', 50, message="AI正在分析会议内容...")
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if model_code:
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summary_content = self._call_llm_with_model(full_prompt, model_code)
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else:
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summary_content = self.llm_service._call_llm_api(full_prompt)
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if not summary_content:
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raise Exception("LLM API调用失败或返回空内容")
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# 5. 保存结果到主表
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self._update_task_status_in_redis(task_id, 'processing', 90, message="保存总结结果...")
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self._save_summary_to_db(meeting_id, summary_content, user_prompt, prompt_id)
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# 6. 导出MD文件到音频同目录
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self._update_task_status_in_redis(task_id, 'processing', 95, message="导出Markdown文件...")
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md_path = self._export_summary_md(meeting_id, summary_content)
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# 7. 任务完成，result保存MD文件路径
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self._update_task_in_db(task_id, 'completed', 100, result=md_path)
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self._update_task_status_in_redis(task_id, 'completed', 100, result=md_path)
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print(f"Task {task_id} completed successfully")
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except Exception as e:
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error_msg = str(e)
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print(f"Task {task_id} failed: {error_msg}")
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# 更新失败状态
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self._update_task_in_db(task_id, 'failed', 0, error_message=error_msg)
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self._update_task_status_in_redis(task_id, 'failed', 0, error_message=error_msg)
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def monitor_and_auto_summarize(
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self,
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meeting_id: int,
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transcription_task_id: str,
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prompt_id: Optional[int] = None,
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model_code: Optional[str] = None
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):
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"""
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监控转录任务，完成后自动生成总结
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此方法设计为由BackgroundTasks调用，在后台运行
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Args:
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meeting_id: 会议ID
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transcription_task_id: 转录任务ID
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prompt_id: 提示词模版ID（可选，如果不指定则使用默认模版）
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model_code: 总结模型编码（可选，如果不指定则使用默认模型）
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流程:
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1. 循环轮询转录任务状态
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2. 转录成功后自动启动总结任务
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3. 转录失败或超时则停止轮询并记录日志
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"""
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print(f"[Monitor] Started monitoring transcription task {transcription_task_id} for meeting {meeting_id}, prompt_id: {prompt_id}, model_code: {model_code}")
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# 获取配置参数
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poll_interval = TRANSCRIPTION_POLL_CONFIG['poll_interval']
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max_wait_time = TRANSCRIPTION_POLL_CONFIG['max_wait_time']
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max_polls = max_wait_time // poll_interval
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# 延迟导入以避免循环导入
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transcription_service = AsyncTranscriptionService()
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poll_count = 0
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try:
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while poll_count < max_polls:
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poll_count += 1
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elapsed_time = poll_count * poll_interval
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try:
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# 查询转录任务状态
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status_info = transcription_service.get_task_status(transcription_task_id)
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current_status = status_info.get('status', 'unknown')
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progress = status_info.get('progress', 0)
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print(f"[Monitor] Poll {poll_count}/{max_polls} - Status: {current_status}, Progress: {progress}%, Elapsed: {elapsed_time}s")
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# 检查转录是否完成
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if current_status == 'completed':
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print(f"[Monitor] Transcription completed successfully for meeting {meeting_id}")
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# 防止并发：检查是否已经有总结任务存在
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existing_task = self._get_existing_summary_task(meeting_id)
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if existing_task:
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print(f"[Monitor] Summary task already exists for meeting {meeting_id}, task_id: {existing_task}, skipping duplicate task creation")
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else:
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# 启动总结任务
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try:
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summary_task_id = self.start_summary_generation(
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meeting_id,
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user_prompt="",
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prompt_id=prompt_id,
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model_code=model_code
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)
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print(f"[Monitor] Summary task {summary_task_id} started for meeting {meeting_id}")
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# 在后台执行总结任务
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self._process_task(summary_task_id)
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except Exception as e:
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error_msg = f"Failed to start summary generation: {e}"
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print(f"[Monitor] {error_msg}")
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# 监控任务完成，退出循环
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break
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# 检查转录是否失败
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elif current_status == 'failed':
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error_msg = status_info.get('error_message', 'Unknown error')
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print(f"[Monitor] Transcription failed for meeting {meeting_id}: {error_msg}")
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# 转录失败，停止监控
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break
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# 转录还在进行中（pending/processing），继续等待
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elif current_status in ['pending', 'processing']:
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# 等待一段时间后继续轮询
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time.sleep(poll_interval)
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else:
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# 未知状态
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print(f"[Monitor] Unknown transcription status: {current_status}")
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time.sleep(poll_interval)
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except Exception as e:
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print(f"[Monitor] Error checking transcription status: {e}")
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# 出错后等待一段时间继续尝试
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time.sleep(poll_interval)
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# 检查是否超时
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if poll_count >= max_polls:
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print(f"[Monitor] Transcription monitoring timed out after {max_wait_time}s for meeting {meeting_id}")
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except Exception as e:
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print(f"[Monitor] Fatal error in monitor_and_auto_summarize: {e}")
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# --- 会议相关方法 ---
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def _call_llm_with_model(self, prompt: str, model_code: str) -> Optional[str]:
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"""使用指定模型编码调用LLM API"""
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import requests
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try:
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with get_db_connection() as connection:
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cursor = connection.cursor(dictionary=True)
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cursor.execute(
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"SELECT endpoint_url, api_key, llm_model_name, llm_timeout, llm_temperature, llm_top_p, llm_max_tokens FROM llm_model_config WHERE model_code = %s AND is_active = 1",
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(model_code,)
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)
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config = cursor.fetchone()
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if not config:
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print(f"模型 {model_code} 未找到或未激活，回退到默认模型")
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return self.llm_service._call_llm_api(prompt)
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endpoint_url = (config['endpoint_url'] or '').rstrip('/')
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if not endpoint_url.endswith('/chat/completions'):
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endpoint_url = f"{endpoint_url}/chat/completions"
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headers = {"Content-Type": "application/json"}
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if config['api_key']:
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headers["Authorization"] = f"Bearer {config['api_key']}"
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payload = {
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"model": config['llm_model_name'],
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"messages": [{"role": "user", "content": prompt}],
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"temperature": float(config.get('llm_temperature', 0.7)),
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"top_p": float(config.get('llm_top_p', 0.9)),
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"max_tokens": int(config.get('llm_max_tokens', 4096)),
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"stream": False,
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}
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response = requests.post(
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endpoint_url,
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headers=headers,
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json=payload,
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timeout=int(config.get('llm_timeout', 120)),
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)
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response.raise_for_status()
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return self.llm_service._extract_response_text(response.json())
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except Exception as e:
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print(f"使用模型 {model_code} 调用失败: {e}")
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return None
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def _export_summary_md(self, meeting_id: int, summary_content: str) -> Optional[str]:
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"""将总结内容导出为MD文件，保存到音频同目录，返回文件路径"""
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try:
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with get_db_connection() as connection:
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cursor = connection.cursor(dictionary=True)
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cursor.execute("SELECT title FROM meetings WHERE meeting_id = %s", (meeting_id,))
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meeting = cursor.fetchone()
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cursor.execute("SELECT file_path FROM audio_files WHERE meeting_id = %s LIMIT 1", (meeting_id,))
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audio = cursor.fetchone()
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title = meeting['title'] if meeting else f"meeting_{meeting_id}"
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# 始终以 AUDIO_DIR 为基准，避免数据库中的绝对路径指向不可写目录
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if audio and audio.get('file_path'):
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audio_path = Path(audio['file_path'])
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# 提取 meeting_id 层级的子目录（如 "226" 或 "226/sub"）
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try:
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rel = audio_path.relative_to(AUDIO_DIR)
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md_dir = AUDIO_DIR / rel.parent
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except ValueError:
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# file_path 不在 AUDIO_DIR 下（如 Docker 绝对路径），取最后一级目录名
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md_dir = AUDIO_DIR / audio_path.parent.name
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else:
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md_dir = AUDIO_DIR / str(meeting_id)
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md_dir.mkdir(parents=True, exist_ok=True)
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safe_title = "".join(c for c in title if c.isalnum() or c in (' ', '-', '_', '.')).strip()
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if not safe_title:
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safe_title = f"meeting_{meeting_id}"
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md_path = md_dir / f"{safe_title}_总结.md"
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md_path.write_text(summary_content, encoding='utf-8')
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md_path_str = str(md_path)
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print(f"总结MD文件已保存: {md_path_str}")
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return md_path_str
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except Exception as e:
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print(f"导出总结MD文件失败: {e}")
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return None
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def _get_meeting_transcript(self, meeting_id: int) -> str:
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"""从数据库获取会议转录内容"""
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try:
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with get_db_connection() as connection:
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cursor = connection.cursor()
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query = """
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SELECT speaker_tag, start_time_ms, end_time_ms, text_content
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FROM transcript_segments
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WHERE meeting_id = %s
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ORDER BY start_time_ms
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"""
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cursor.execute(query, (meeting_id,))
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segments = cursor.fetchall()
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if not segments:
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return ""
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# 组装转录文本
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transcript_lines = []
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for speaker_tag, start_time, end_time, text in segments:
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# 将毫秒转换为分:秒格式
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start_min = start_time // 60000
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start_sec = (start_time % 60000) // 1000
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transcript_lines.append(f"[{start_min:02d}:{start_sec:02d}] 说话人{speaker_tag}: {text}")
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return "\n".join(transcript_lines)
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except Exception as e:
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print(f"获取会议转录内容错误: {e}")
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return ""
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def _get_meeting_prompt_context(self, meeting_id: int) -> Dict[str, Any]:
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try:
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with get_db_connection() as connection:
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cursor = connection.cursor(dictionary=True)
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cursor.execute(
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"""
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SELECT m.title, m.meeting_time, u.caption AS creator_name
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FROM meetings m
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LEFT JOIN sys_users u ON m.user_id = u.user_id
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WHERE m.meeting_id = %s
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""",
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(meeting_id,)
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)
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meeting = cursor.fetchone()
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if not meeting:
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cursor.close()
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return {}
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meeting_time = meeting.get('meeting_time')
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meeting_time_text = ''
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if isinstance(meeting_time, datetime):
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meeting_time_text = meeting_time.strftime('%Y-%m-%d %H:%M:%S')
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elif meeting_time:
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meeting_time_text = str(meeting_time)
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cursor.execute(
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"""
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SELECT u.caption
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FROM attendees a
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JOIN sys_users u ON a.user_id = u.user_id
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WHERE a.meeting_id = %s
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ORDER BY u.caption ASC
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""",
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(meeting_id,)
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)
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attendee_rows = cursor.fetchall()
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attendee_names = [row.get('caption') for row in attendee_rows if row.get('caption')]
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attendee_text = '、'.join(attendee_names)
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cursor.close()
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return {
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'title': meeting.get('title') or '',
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'meeting_time': meeting_time_text,
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'meeting_time_value': meeting_time,
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'creator_name': meeting.get('creator_name') or '',
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'attendees': attendee_text
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}
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except Exception as e:
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print(f"获取会议提示词上下文错误: {e}")
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return {}
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def _format_meeting_time_value(self, meeting_time_value: Any, custom_format: Optional[str] = None) -> str:
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default_format = '%Y-%m-%d %H:%M:%S'
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if isinstance(meeting_time_value, datetime):
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try:
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return meeting_time_value.strftime(custom_format or default_format)
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except Exception:
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return meeting_time_value.strftime(default_format)
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if meeting_time_value:
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meeting_time_text = str(meeting_time_value)
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if custom_format:
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try:
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parsed_time = datetime.fromisoformat(meeting_time_text.replace('Z', '+00:00'))
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return parsed_time.strftime(custom_format)
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except Exception:
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return meeting_time_text
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return meeting_time_text
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return ''
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def _apply_prompt_variables(self, template: str, variables: Dict[str, Any]) -> str:
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if not template:
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return template
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rendered = re.sub(
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r"\{\{\s*meeting_time\s*:\s*([^{}]+?)\s*\}\}",
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lambda match: self._format_meeting_time_value(
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variables.get('meeting_time_value'),
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match.group(1).strip()
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),
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template
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)
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for key, value in variables.items():
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if key == 'meeting_time_value':
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continue
|
||
rendered = rendered.replace(f"{{{{{key}}}}}", value or '')
|
||
rendered = rendered.replace(f"{{{{ {key} }}}}", value or '')
|
||
return rendered
|
||
|
||
def _build_prompt(self, meeting_id: int, transcript_text: str, user_prompt: str, prompt_id: Optional[int] = None) -> str:
|
||
"""
|
||
构建完整的提示词
|
||
使用数据库中配置的MEETING_TASK提示词模板
|
||
|
||
Args:
|
||
meeting_id: 会议ID
|
||
transcript_text: 会议转录文本
|
||
user_prompt: 用户额外提示词
|
||
prompt_id: 可选的提示词模版ID，如果不指定则使用默认模版
|
||
"""
|
||
# 从数据库获取会议任务的提示词模板（支持指定prompt_id）
|
||
system_prompt = self.llm_service.get_task_prompt('MEETING_TASK', prompt_id=prompt_id)
|
||
meeting_context = self._get_meeting_prompt_context(meeting_id)
|
||
prompt_variables = {
|
||
'meeting_id': str(meeting_id),
|
||
'meeting_title': meeting_context.get('title', ''),
|
||
'meeting_time': meeting_context.get('meeting_time', ''),
|
||
'meeting_creator': meeting_context.get('creator_name', ''),
|
||
'meeting_attendees': meeting_context.get('attendees', ''),
|
||
'meeting_time_value': meeting_context.get('meeting_time_value')
|
||
}
|
||
system_prompt = self._apply_prompt_variables(system_prompt, prompt_variables)
|
||
rendered_user_prompt = self._apply_prompt_variables(user_prompt, prompt_variables) if user_prompt else ''
|
||
|
||
prompt = f"{system_prompt}\n\n"
|
||
|
||
if rendered_user_prompt:
|
||
prompt += f"用户额外要求：{rendered_user_prompt}\n\n"
|
||
|
||
prompt += f"会议转录内容：\n{transcript_text}\n\n请根据以上内容生成会议总结："
|
||
|
||
return prompt
|
||
|
||
def _save_summary_to_db(self, meeting_id: int, summary_content: str, user_prompt: str, prompt_id: Optional[int] = None) -> Optional[int]:
|
||
"""保存总结到数据库 - 更新meetings表的summary、user_prompt、prompt_id和updated_at字段"""
|
||
try:
|
||
with get_db_connection() as connection:
|
||
cursor = connection.cursor()
|
||
|
||
# 更新meetings表的summary、user_prompt、prompt_id和updated_at字段
|
||
update_query = """
|
||
UPDATE meetings
|
||
SET summary = %s, user_prompt = %s, prompt_id = %s, updated_at = NOW()
|
||
WHERE meeting_id = %s
|
||
"""
|
||
cursor.execute(update_query, (summary_content, user_prompt, prompt_id, meeting_id))
|
||
connection.commit()
|
||
|
||
print(f"成功保存会议总结到meetings表，meeting_id: {meeting_id}, prompt_id: {prompt_id}")
|
||
return meeting_id
|
||
|
||
except Exception as e:
|
||
print(f"保存总结到数据库错误: {e}")
|
||
return None
|
||
|
||
# --- 状态查询和数据库操作方法 ---
|
||
|
||
def get_task_status(self, task_id: str) -> Dict[str, Any]:
|
||
"""获取任务状态"""
|
||
try:
|
||
task_data = self.redis_client.hgetall(f"llm_task:{task_id}")
|
||
if not task_data:
|
||
task_data = self._get_task_from_db(task_id)
|
||
if not task_data:
|
||
return {'task_id': task_id, 'status': 'not_found', 'error_message': 'Task not found'}
|
||
|
||
return {
|
||
'task_id': task_id,
|
||
'status': task_data.get('status', 'unknown'),
|
||
'progress': int(task_data.get('progress', 0)),
|
||
'meeting_id': int(task_data.get('meeting_id', 0)),
|
||
'created_at': task_data.get('created_at'),
|
||
'updated_at': task_data.get('updated_at'),
|
||
'message': task_data.get('message'),
|
||
'result': task_data.get('result'),
|
||
'error_message': task_data.get('error_message')
|
||
}
|
||
except Exception as e:
|
||
print(f"Error getting task status: {e}")
|
||
return {'task_id': task_id, 'status': 'error', 'error_message': str(e)}
|
||
|
||
def get_meeting_llm_tasks(self, meeting_id: int) -> List[Dict[str, Any]]:
|
||
"""获取会议的所有LLM任务"""
|
||
try:
|
||
with get_db_connection() as connection:
|
||
cursor = connection.cursor(dictionary=True)
|
||
query = "SELECT task_id, status, progress, user_prompt, created_at, completed_at, error_message FROM llm_tasks WHERE meeting_id = %s ORDER BY created_at DESC"
|
||
cursor.execute(query, (meeting_id,))
|
||
tasks = cursor.fetchall()
|
||
for task in tasks:
|
||
if task.get('created_at'): task['created_at'] = task['created_at'].isoformat()
|
||
if task.get('completed_at'): task['completed_at'] = task['completed_at'].isoformat()
|
||
return tasks
|
||
except Exception as e:
|
||
print(f"Error getting meeting LLM tasks: {e}")
|
||
return []
|
||
|
||
def get_meeting_llm_status(self, meeting_id: int) -> Optional[Dict[str, Any]]:
|
||
"""
|
||
获取会议的最新LLM任务状态（与transcription对齐）
|
||
|
||
Args:
|
||
meeting_id: 会议ID
|
||
|
||
Returns:
|
||
Optional[Dict]: 任务状态信息，如果没有任务返回None
|
||
"""
|
||
try:
|
||
with get_db_connection() as connection:
|
||
cursor = connection.cursor(dictionary=True)
|
||
|
||
# 查询最新的LLM任务
|
||
query = """
|
||
SELECT task_id, status, progress, created_at, completed_at, error_message
|
||
FROM llm_tasks
|
||
WHERE meeting_id = %s
|
||
ORDER BY created_at DESC
|
||
LIMIT 1
|
||
"""
|
||
cursor.execute(query, (meeting_id,))
|
||
task_record = cursor.fetchone()
|
||
|
||
cursor.close()
|
||
|
||
if not task_record:
|
||
return None
|
||
|
||
# 如果任务还在进行中，获取最新状态
|
||
if task_record['status'] in ['pending', 'processing']:
|
||
try:
|
||
return self.get_task_status(task_record['task_id'])
|
||
except Exception as e:
|
||
print(f"Failed to get latest LLM task status for meeting {meeting_id}, returning DB status. Error: {e}")
|
||
|
||
return {
|
||
'task_id': task_record['task_id'],
|
||
'status': task_record['status'],
|
||
'progress': task_record['progress'] or 0,
|
||
'meeting_id': meeting_id,
|
||
'created_at': task_record['created_at'].isoformat() if task_record['created_at'] else None,
|
||
'completed_at': task_record['completed_at'].isoformat() if task_record['completed_at'] else None,
|
||
'error_message': task_record['error_message']
|
||
}
|
||
|
||
except Exception as e:
|
||
print(f"Error getting meeting LLM status: {e}")
|
||
return None
|
||
|
||
def _update_task_status_in_redis(self, task_id: str, status: str, progress: int, message: str = None, result: str = None, error_message: str = None):
|
||
"""更新Redis中的任务状态"""
|
||
try:
|
||
update_data = {
|
||
'status': status,
|
||
'progress': str(progress),
|
||
'updated_at': datetime.now().isoformat()
|
||
}
|
||
if message: update_data['message'] = message
|
||
if result: update_data['result'] = result
|
||
if error_message: update_data['error_message'] = error_message
|
||
self.redis_client.hset(f"llm_task:{task_id}", mapping=update_data)
|
||
except Exception as e:
|
||
print(f"Error updating task status in Redis: {e}")
|
||
|
||
def _save_task_to_db(self, task_id: str, meeting_id: int, user_prompt: str, prompt_id: Optional[int] = None):
|
||
"""保存任务到数据库
|
||
|
||
Args:
|
||
task_id: 任务ID
|
||
meeting_id: 会议ID
|
||
user_prompt: 用户额外提示词
|
||
prompt_id: 可选的提示词模版ID，如果为None则使用默认模版
|
||
"""
|
||
try:
|
||
with get_db_connection() as connection:
|
||
cursor = connection.cursor()
|
||
insert_query = "INSERT INTO llm_tasks (task_id, meeting_id, user_prompt, prompt_id, status, progress, created_at) VALUES (%s, %s, %s, %s, 'pending', 0, NOW())"
|
||
cursor.execute(insert_query, (task_id, meeting_id, user_prompt, prompt_id))
|
||
connection.commit()
|
||
print(f"[Meeting Service] Task saved successfully to database")
|
||
except Exception as e:
|
||
print(f"Error saving task to database: {e}")
|
||
raise
|
||
|
||
def _update_task_in_db(self, task_id: str, status: str, progress: int, result: str = None, error_message: str = None):
|
||
"""更新数据库中的任务状态"""
|
||
try:
|
||
with get_db_connection() as connection:
|
||
cursor = connection.cursor()
|
||
if status == 'completed':
|
||
query = "UPDATE llm_tasks SET status = %s, progress = %s, result = %s, error_message = NULL, completed_at = NOW() WHERE task_id = %s"
|
||
params = (status, progress, result, task_id)
|
||
else:
|
||
query = "UPDATE llm_tasks SET status = %s, progress = %s, error_message = %s WHERE task_id = %s"
|
||
params = (status, progress, error_message, task_id)
|
||
|
||
cursor.execute(query, params)
|
||
connection.commit()
|
||
except Exception as e:
|
||
print(f"Error updating task in database: {e}")
|
||
|
||
def _get_task_from_db(self, task_id: str) -> Optional[Dict[str, str]]:
|
||
"""从数据库获取任务信息"""
|
||
try:
|
||
with get_db_connection() as connection:
|
||
cursor = connection.cursor(dictionary=True)
|
||
query = "SELECT * FROM llm_tasks WHERE task_id = %s"
|
||
cursor.execute(query, (task_id,))
|
||
task = cursor.fetchone()
|
||
if task:
|
||
# 确保所有字段都是字符串，以匹配Redis的行为
|
||
return {k: v.isoformat() if isinstance(v, datetime) else str(v) for k, v in task.items()}
|
||
return None
|
||
except Exception as e:
|
||
print(f"Error getting task from database: {e}")
|
||
return None
|
||
|
||
def _get_existing_summary_task(self, meeting_id: int) -> Optional[str]:
|
||
"""
|
||
检查会议是否已经有总结任务（用于并发控制）
|
||
返回最新的pending或processing状态的任务ID，如果没有则返回None
|
||
"""
|
||
try:
|
||
with get_db_connection() as connection:
|
||
cursor = connection.cursor(dictionary=True)
|
||
query = """
|
||
SELECT task_id FROM llm_tasks
|
||
WHERE meeting_id = %s AND status IN ('pending', 'processing')
|
||
ORDER BY created_at DESC
|
||
LIMIT 1
|
||
"""
|
||
cursor.execute(query, (meeting_id,))
|
||
result = cursor.fetchone()
|
||
cursor.close()
|
||
|
||
if result:
|
||
return result['task_id']
|
||
return None
|
||
|
||
except Exception as e:
|
||
print(f"Error checking existing summary task: {e}")
|
||
return None
|
||
|
||
# 创建全局实例
|
||
async_meeting_service = AsyncMeetingService()
|