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https://github.com/EvolutionAPI/adk-python.git
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27ce65ff50
--21736067f9by Alankrit Verma <alankrit386@gmail.com>: feat(llm_flows): support async before/after tool callbacks Previously, callbacks were treated as purely synchronous, so passing an async coroutine caused “was never awaited” errors and Pydantic serialization failures. Now we detect awaitable return values from before_tool_callback and after_tool_callback, and `await` them if necessary. Fixes: #380 --08ac9a117eby Alankrit Verma <alankrit386@gmail.com>: Refactor function callback handling and update type signatures - Simplify variable names in `functions.py`: always use `function_response` and `altered_function_response` - Update LlmAgent callback type aliases to support async: - Import `Awaitable` - Change `BeforeToolCallback` and `AfterToolCallback` signatures to return `Awaitable[Optional[dict]]` - Ensure `after_tool_callback` uses `await` when necessary --fcbf57466eby Alankrit Verma <alankrit386@gmail.com>: refactor: update callback type signatures to support sync and async responses COPYBARA_INTEGRATE_REVIEW=https://github.com/google/adk-python/pull/434 from AlankritVerma01:support-async-tool-callbacks926b0ef1a6PiperOrigin-RevId: 753005846
110 lines
3.2 KiB
Python
110 lines
3.2 KiB
Python
# Copyright 2025 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import Any, Dict, Optional
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import pytest
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from google.adk.agents import Agent
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from google.adk.tools.function_tool import FunctionTool
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from google.adk.tools.tool_context import ToolContext
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from google.adk.flows.llm_flows.functions import handle_function_calls_async
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from google.adk.events.event import Event
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from google.genai import types
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from ... import utils
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class AsyncBeforeToolCallback:
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def __init__(self, mock_response: Dict[str, Any]):
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self.mock_response = mock_response
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async def __call__(
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self,
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tool: FunctionTool,
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args: Dict[str, Any],
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tool_context: ToolContext,
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) -> Optional[Dict[str, Any]]:
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return self.mock_response
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class AsyncAfterToolCallback:
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def __init__(self, mock_response: Dict[str, Any]):
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self.mock_response = mock_response
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async def __call__(
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self,
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tool: FunctionTool,
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args: Dict[str, Any],
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tool_context: ToolContext,
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tool_response: Dict[str, Any],
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) -> Optional[Dict[str, Any]]:
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return self.mock_response
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async def invoke_tool_with_callbacks(
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before_cb=None, after_cb=None
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) -> Optional[Event]:
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def simple_fn(**kwargs) -> Dict[str, Any]:
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return {"initial": "response"}
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tool = FunctionTool(simple_fn)
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model = utils.MockModel.create(responses=[])
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agent = Agent(
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name="agent",
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model=model,
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tools=[tool],
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before_tool_callback=before_cb,
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after_tool_callback=after_cb,
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)
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invocation_context = utils.create_invocation_context(
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agent=agent, user_content=""
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)
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# Build function call event
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function_call = types.FunctionCall(name=tool.name, args={})
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content = types.Content(parts=[types.Part(function_call=function_call)])
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event = Event(
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invocation_id=invocation_context.invocation_id,
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author=agent.name,
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content=content,
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)
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tools_dict = {tool.name: tool}
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return await handle_function_calls_async(
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invocation_context,
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event,
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tools_dict,
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)
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@pytest.mark.asyncio
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async def test_async_before_tool_callback():
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mock_resp = {"test": "before_tool_callback"}
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before_cb = AsyncBeforeToolCallback(mock_resp)
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result_event = await invoke_tool_with_callbacks(before_cb=before_cb)
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assert result_event is not None
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part = result_event.content.parts[0]
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assert part.function_response.response == mock_resp
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@pytest.mark.asyncio
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async def test_async_after_tool_callback():
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mock_resp = {"test": "after_tool_callback"}
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after_cb = AsyncAfterToolCallback(mock_resp)
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result_event = await invoke_tool_with_callbacks(after_cb=after_cb)
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assert result_event is not None
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part = result_event.content.parts[0]
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assert part.function_response.response == mock_resp
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