117 lines
3.3 KiB
Python
117 lines
3.3 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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块处理器基类模块
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提供所有块处理器的基类和注册功能
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"""
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from abc import ABC, abstractmethod
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from typing import Dict, List, Any, Optional, Type, Callable
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import json
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import logging
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# 获取日志记录器
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logger = logging.getLogger(__name__)
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# 块处理器注册表
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_block_handlers = {}
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class BlockHandler(ABC):
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"""
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块处理器抽象基类
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所有具体的块处理器都应该继承这个类
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"""
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@abstractmethod
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async def execute(
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self,
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block: Dict[str, Any],
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input_params: Dict[str, Any],
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context: Any # TaskContext类型，避免循环导入
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) -> Dict[str, Any]:
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"""
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执行块
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Args:
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block: 块定义
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input_params: 解析后的输入参数
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context: 任务上下文
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Returns:
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Dict[str, Any]: 执行结果，必须包含success字段
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"""
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pass
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async def _record_task_log(
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self,
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block: Dict[str, Any],
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result: Dict[str, Any],
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context: Any # TaskContext类型，避免循环导入
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) -> None:
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"""
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记录任务日志
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Args:
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block: 块定义
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result: 执行结果
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context: 任务上下文
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"""
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from sqlalchemy import insert
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from data.models.tasklog import VWEDTaskLog
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from data.session import get_async_session
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import uuid
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from datetime import datetime
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try:
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# 创建任务日志记录
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task_log_id = str(uuid.uuid4())
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# 自定义JSON序列化器，处理datetime对象和bytes对象
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def json_serializer(obj):
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if isinstance(obj, datetime):
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return obj.isoformat()
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if isinstance(obj, bytes):
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return obj.decode('utf-8', errors='backslashreplace')
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raise TypeError(f"Object of type {type(obj)} is not JSON serializable")
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async with get_async_session() as session:
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stmt = insert(VWEDTaskLog).values(
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id=task_log_id,
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level=1 if result.get("success", False) else 3, # 1: 信息, 3: 错误
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message=json.dumps(result, ensure_ascii=False, default=json_serializer),
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task_block_id=block.get("name", "unknown"),
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task_id=context.task_def_id,
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task_record_id=context.task_record_id
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)
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await session.execute(stmt)
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await session.commit()
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except Exception as e:
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logger.error(f"记录任务日志失败: {str(e)}")
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# 注册装饰器
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def register_handler(block_type: str):
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"""
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注册块处理器的装饰器
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Args:
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block_type: 块类型
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"""
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def decorator(cls):
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_block_handlers[block_type] = cls()
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return cls
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return decorator
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# 获取块处理器
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def get_block_handler(block_type: str) -> Optional[BlockHandler]:
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"""
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获取块处理器
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Args:
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block_type: 块类型
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Returns:
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Optional[BlockHandler]: 对应的块处理器，如果不存在则返回None
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"""
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return _block_handlers.get(block_type) |