数据库操作说明
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# system_management/scheduler/task_scheduler.py
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import importlib
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import time
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from datetime import datetime, timedelta
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from typing import Dict, List, Optional
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from storage.mysql_agent import MySQLAgent
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from pathlib import Path
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# 使用您的日志系统
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from utils.logger import CrossPlatformLog
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log = CrossPlatformLog.get_logger("TaskScheduler")
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class TaskScheduler:
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def __init__(self, db_config: Optional[Dict] = None):
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"""
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初始化任务调度器
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Args:
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db_config (Optional[Dict]): 可选的数据库配置，默认使用MySQLAgent默认配置
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"""
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self.db = MySQLAgent(db_config or {}) # 使用您提供的MySQLAgent
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self._init_task_table()
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log.info("TaskScheduler initialized")
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def _init_task_table(self):
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"""确保任务表存在并包含必要字段"""
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if not self.db.table_exists("main_task"):
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log.info("Creating main_task table")
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create_sql = """
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CREATE TABLE main_task (
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task_id INT AUTO_INCREMENT PRIMARY KEY,
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task_name VARCHAR(100) NOT NULL,
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module_path VARCHAR(255) NOT NULL COMMENT '例如data_collection.spiders.weibo_spider',
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frequency_type ENUM('minute','hourly','daily','weekly','monthly') NOT NULL,
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frequency_value INT DEFAULT NULL COMMENT '间隔数值',
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last_run_time DATETIME DEFAULT NULL,
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next_run_time DATETIME DEFAULT NULL,
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last_run_status VARCHAR(20) DEFAULT NULL,
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is_active TINYINT(1) DEFAULT 1,
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is_running TINYINT(1) DEFAULT 0,
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run_count INT DEFAULT 0,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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INDEX idx_next_run (next_run_time),
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INDEX idx_active (is_active)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
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"""
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self.db.execute_sql(create_sql)
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log.success("main_task table created")
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def run_pending_tasks(self) -> Dict[str, int]:
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"""
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执行所有到期的活跃任务
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Returns:
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Dict[str, int]: 包含执行结果的字典 {
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'total': 总任务数,
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'success': 成功数,
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'failed': 失败数
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}
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"""
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result = {'total': 0, 'success': 0, 'failed': 0}
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try:
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# 使用您提供的query_to_df方法获取任务
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tasks_df = self.db.query_to_df(
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"SELECT * FROM main_task "
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"WHERE is_active = 1 AND next_run_time <= %s "
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"ORDER BY next_run_time",
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params=(datetime.now(),)
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)
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result['total'] = len(tasks_df)
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if tasks_df.empty:
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log.debug("No pending tasks found")
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return result
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for _, task in tasks_df.iterrows():
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task_id = task['task_id']
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log.bind(task_id=task_id).info(
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f"Starting task {task['task_name']}"
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)
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# 标记任务为执行中
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self._update_task_status(
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task_id,
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{'is_running': 1, 'last_run_time': datetime.now()}
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)
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try:
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self._execute_single_task(task)
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self._update_task_status(
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task_id,
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{
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'last_run_status': 'success',
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'is_running': 0,
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'run_count': task['run_count'] + 1,
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'next_run_time': self._calculate_next_run(
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task['frequency_type'],
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task['frequency_value']
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)
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}
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)
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result['success'] += 1
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log.bind(task_id=task_id).success("Task completed")
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except Exception as e:
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log.bind(task_id=task_id).error(
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f"Task failed: {str(e)}",
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exc_info=True
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)
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self._update_task_status(
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task_id,
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{
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'last_run_status': 'failed',
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'is_running': 0,
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'next_run_time': self._calculate_next_run(
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task['frequency_type'],
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task['frequency_value'],
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retry=True
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)
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}
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)
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result['failed'] += 1
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log.info(
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"Scheduler cycle completed",
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total_tasks=result['total'],
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success=result['success'],
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failed=result['failed']
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)
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return result
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except Exception as e:
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log.critical(
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"Scheduler main loop failed",
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exc_info=True
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)
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raise
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def _execute_single_task(self, task: Dict) -> None:
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"""执行单个任务模块"""
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start_time = time.time()
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task_log = log.bind(
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task_id=task['task_id'],
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module=task['module_path']
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)
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try:
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module = importlib.import_module(task['module_path'])
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if not hasattr(module, 'main'):
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raise ImportError(f"Module has no main() function")
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# 执行任务
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task_log.debug("Task execution started")
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module.main()
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elapsed = time.time() - start_time
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task_log.info(
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f"Task completed in {elapsed:.2f}s",
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duration=elapsed
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)
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except Exception as e:
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task_log.error(
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"Task execution failed",
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exc_info=True
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)
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raise
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def _update_task_status(self, task_id: int, updates: Dict) -> None:
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"""更新任务状态"""
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set_clause = ", ".join([f"{k}=%s" for k in updates.keys()])
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sql = f"UPDATE main_task SET {set_clause} WHERE task_id=%s"
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params = list(updates.values()) + [task_id]
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try:
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affected = self.db.execute_sql(sql, params=params)
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if affected != 1:
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log.warning(
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"Unexpected row count in update",
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task_id=task_id,
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expected=1,
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affected=affected
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)
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except Exception as e:
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log.error(
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"Failed to update task status",
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task_id=task_id,
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exc_info=True
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)
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raise
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def _calculate_next_run(self, freq_type: str, freq_value: Optional[int] = None,
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retry: bool = False) -> datetime:
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"""
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计算下次执行时间（带重试逻辑）
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"""
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base_time = datetime.now()
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if retry:
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# 失败后15分钟重试
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log.debug("Calculating retry time")
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return base_time + timedelta(minutes=15)
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if freq_type == 'minute':
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delta = timedelta(minutes=freq_value or 1)
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elif freq_type == 'hourly':
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delta = timedelta(hours=freq_value or 1)
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elif freq_type == 'daily':
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delta = timedelta(days=freq_value or 1)
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elif freq_type == 'weekly':
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delta = timedelta(weeks=freq_value or 1)
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elif freq_type == 'monthly':
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# 处理月末日期特殊情况
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next_month = (base_time.replace(day=1) + timedelta(days=32)).replace(day=1)
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last_day = (next_month - timedelta(days=1)).day
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day = min(base_time.day, last_day)
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return base_time.replace(day=1, month=next_month.month, day=day)
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else:
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raise ValueError(f"Unknown frequency type: {freq_type}")
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return base_time + delta
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def add_task(self, task_name: str, module_path: str, frequency_type: str,
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frequency_value: Optional[int] = None) -> int:
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"""
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添加新任务到调度系统
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"""
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sql = """
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INSERT INTO main_task
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(task_name, module_path, frequency_type, frequency_value, next_run_time)
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VALUES (%s, %s, %s, %s, %s)
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"""
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next_run = self._calculate_next_run(frequency_type, frequency_value)
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params = (task_name, module_path, frequency_type, frequency_value, next_run)
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try:
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self.db.execute_sql(sql, params=params)
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task_id = self.db.query_to_df("SELECT LAST_INSERT_ID() AS id").iloc[0]['id']
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log.info(
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"New task added",
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task_id=task_id,
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task_name=task_name,
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next_run=next_run
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)
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return task_id
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except Exception as e:
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log.error(
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"Failed to add new task",
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task_name=task_name,
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exc_info=True
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)
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raise
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def get_task_status(self, active_only: bool = True) -> pd.DataFrame:
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"""
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获取任务状态
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"""
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where = "WHERE is_active = 1" if active_only else ""
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log.debug("Fetching task status", active_only=active_only)
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return self.db.query_to_df(
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f"""
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SELECT
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task_id, task_name, module_path,
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frequency_type, frequency_value,
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last_run_time, next_run_time,
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last_run_status, run_count,
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is_active, is_running
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FROM main_task
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{where}
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ORDER BY next_run_time
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"""
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)
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