mirror of
https://github.com/bytedance/deer-flow.git
synced 2026-05-20 15:11:09 +00:00
AochenShen99
93 lines
3.2 KiB
Python
93 lines
3.2 KiB
Python
"""Utilities for invoking async tools from synchronous agent paths."""
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import asyncio
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import atexit
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import concurrent.futures
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import contextvars
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import functools
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import logging
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from collections.abc import Callable
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from typing import Any, get_type_hints
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from langchain_core.runnables import RunnableConfig
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logger = logging.getLogger(__name__)
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# Shared thread pool for sync tool invocation in async environments.
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_SYNC_TOOL_EXECUTOR = concurrent.futures.ThreadPoolExecutor(max_workers=10, thread_name_prefix="tool-sync")
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atexit.register(lambda: _SYNC_TOOL_EXECUTOR.shutdown(wait=False))
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def _get_runnable_config_param(func: Callable[..., Any]) -> str | None:
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"""Return the coroutine parameter that expects LangChain RunnableConfig."""
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if isinstance(func, functools.partial):
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func = func.func
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try:
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type_hints = get_type_hints(func)
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except Exception:
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return None
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for name, type_ in type_hints.items():
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if type_ is RunnableConfig:
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return name
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return None
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def make_sync_tool_wrapper(coro: Callable[..., Any], tool_name: str) -> Callable[..., Any]:
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"""Build a synchronous wrapper for an asynchronous tool coroutine.
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Args:
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coro: Async callable backing a LangChain tool.
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tool_name: Tool name used in error logs.
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Returns:
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A sync callable suitable for ``BaseTool.func``.
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Notes:
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If ``coro`` declares a ``RunnableConfig`` parameter, this wrapper
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exposes ``config: RunnableConfig`` so LangChain can inject runtime
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config and then forwards it to the coroutine's detected config
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parameter. This covers DeerFlow's current config-sensitive tools, such
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as ``invoke_acp_agent``.
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This wrapper intentionally does not synthesize a dynamic function
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signature. A future async tool with a normal user-facing argument named
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``config`` and a separate ``RunnableConfig`` parameter named something
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else, such as ``run_config``, may collide with LangChain's injected
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``config`` argument. Rename that user-facing field or extend this
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helper before using that signature.
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"""
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config_param = _get_runnable_config_param(coro)
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def run_coroutine(*args: Any, **kwargs: Any) -> Any:
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try:
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loop = asyncio.get_running_loop()
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except RuntimeError:
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loop = None
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try:
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if loop is not None and loop.is_running():
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context = contextvars.copy_context()
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future = _SYNC_TOOL_EXECUTOR.submit(context.run, lambda: asyncio.run(coro(*args, **kwargs)))
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return future.result()
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return asyncio.run(coro(*args, **kwargs))
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except Exception as e:
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logger.error("Error invoking tool %r via sync wrapper: %s", tool_name, e, exc_info=True)
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raise
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if config_param:
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def sync_wrapper(*args: Any, config: RunnableConfig = None, **kwargs: Any) -> Any:
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if config is not None or config_param not in kwargs:
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kwargs[config_param] = config
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return run_coroutine(*args, **kwargs)
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return sync_wrapper
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def sync_wrapper(*args: Any, **kwargs: Any) -> Any:
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return run_coroutine(*args, **kwargs)
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return sync_wrapper
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