60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
"""
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完成事件节点模块
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负责发送完成事件，包含token使用情况和耗时信息
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"""
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from typing import Any, Dict
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# 本地模块
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from ...main_graph.state import MainGraphState
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from ...utils.logging import log_state_change
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from ...logger import info, warning
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from langchain_core.runnables.config import RunnableConfig
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async def finalize_node(state: MainGraphState, config: RunnableConfig) -> Dict[str, Any]:
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"""
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完成事件节点 - 发送完成事件，包含token使用情况和耗时信息
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Args:
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state: 当前对话状态
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config: 运行时配置
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Returns:
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更新后的状态（包含 final_result）
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"""
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log_state_change("finalize", state, "进入")
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# 确保 final_result 被传递出去
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result = {
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"final_result": state.final_result,
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"success": state.success,
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"current_phase": "done"
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}
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try:
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# 获取流式写入器并发送完成事件
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from backend.app.main_graph.config import get_stream_writer
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writer = get_stream_writer()
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# 只在 writer 存在且不是 noop 时才发送
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if writer and hasattr(writer, '__call__'):
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try:
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writer({
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"type": "custom",
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"data": {
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"type": "done",
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"token_usage": state.last_token_usage,
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"elapsed_time": state.last_elapsed_time,
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"final_result": state.final_result
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}
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})
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info("🏁 [完成事件] 已发送完成事件")
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except Exception as e:
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warning(f"⚠️ [完成事件] 发送完成事件失败 (非致命): {e}")
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except Exception as e:
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warning(f"⚠️ [完成事件] 处理失败 (非致命): {e}")
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log_state_change("finalize", state, "离开")
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return result |