88 lines
2.9 KiB
Python
88 lines
2.9 KiB
Python
import inspect
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import time
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from abc import ABC, abstractmethod
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from typing import TYPE_CHECKING, TypeVar
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from langgraph.errors import GraphInterrupt
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from loguru import logger
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from pydantic import ValidationError
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if TYPE_CHECKING:
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from app.config import Settings
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from app.exceptions import AppError, ImportProcessError
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from app.processor.progress import node_progress
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T = TypeVar("T")
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class BaseNode(ABC):
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name: str = "base_node"
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def __init__(self, config: "Settings | None" = None):
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"""保存显式配置；全局配置在节点实际使用时才加载。"""
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self._config = config
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self.logger = logger.bind(node=self.name)
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@property
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def config(self) -> "Settings":
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if self._config is None:
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from app.config import settings
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self._config = settings
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return self._config
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def __call__(self, state: T) -> T:
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"""执行节点，统一记录日志、耗时并保留业务异常类型"""
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if inspect.iscoroutinefunction(self.process):
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return self._acall(state)
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start_time = time.perf_counter()
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self.logger.info("节点开始")
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try:
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with node_progress(self.name, state):
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result = self.process(state)
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except GraphInterrupt:
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raise
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except (AppError, ValidationError):
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self.logger.error("节点执行失败")
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raise
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except Exception as e:
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self.logger.error("节点执行失败")
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raise ImportProcessError(str(e), node_name=self.name) from e
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else:
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self.logger.info("节点完成")
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return result
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finally:
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self.logger.info(f"节点耗时 {time.perf_counter() - start_time:.3f} 秒")
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@abstractmethod
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def process(self, state: T) -> T:
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"""子类实现节点核心逻辑，返回状态更新"""
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async def _acall(self, state: T) -> T:
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"""异步节点等待执行完成后再记录结果和耗时"""
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start_time = time.perf_counter()
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self.logger.info("节点开始")
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try:
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with node_progress(self.name, state):
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result = await self.process(state)
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except GraphInterrupt:
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raise
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except (AppError, ValidationError):
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self.logger.error("节点执行失败")
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raise
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except Exception as error:
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self.logger.error("节点执行失败")
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raise ImportProcessError(str(error), node_name=self.name) from error
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else:
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self.logger.info("节点完成")
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return result
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finally:
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self.logger.info(f"节点耗时 {time.perf_counter() - start_time:.3f} 秒")
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def log_step(self, step_name: str, message: str = ""):
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"""记录步骤日志。"""
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log_msg = f"[{step_name}]"
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if message:
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log_msg += f" {message}"
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self.logger.info(log_msg)
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