mirror of
https://github.com/EvolutionAPI/adk-python.git
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337 lines
10 KiB
Python
337 lines
10 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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import logging
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import re
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import time
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from typing import Any
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from typing import Optional
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from dateutil import parser
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from google import genai
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from typing_extensions import override
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from ..events.event import Event
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from ..events.event_actions import EventActions
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from . import _session_util
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from .base_session_service import BaseSessionService
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from .base_session_service import GetSessionConfig
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from .base_session_service import ListSessionsResponse
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from .session import Session
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isoparse = parser.isoparse
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logger = logging.getLogger('google_adk.' + __name__)
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class VertexAiSessionService(BaseSessionService):
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"""Connects to the managed Vertex AI Session Service."""
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def __init__(
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self,
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project: str = None,
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location: str = None,
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):
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self.project = project
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self.location = location
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client = genai.Client(vertexai=True, project=project, location=location)
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self.api_client = client._api_client
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@override
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async def create_session(
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self,
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*,
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app_name: str,
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user_id: str,
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state: Optional[dict[str, Any]] = None,
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session_id: Optional[str] = None,
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) -> Session:
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if session_id:
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raise ValueError(
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'User-provided Session id is not supported for'
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' VertexAISessionService.'
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)
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reasoning_engine_id = _parse_reasoning_engine_id(app_name)
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session_json_dict = {'user_id': user_id}
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if state:
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session_json_dict['session_state'] = state
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api_response = self.api_client.request(
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http_method='POST',
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path=f'reasoningEngines/{reasoning_engine_id}/sessions',
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request_dict=session_json_dict,
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)
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logger.info(f'Create Session response {api_response}')
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session_id = api_response['name'].split('/')[-3]
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operation_id = api_response['name'].split('/')[-1]
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max_retry_attempt = 5
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while max_retry_attempt >= 0:
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lro_response = self.api_client.request(
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http_method='GET',
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path=f'operations/{operation_id}',
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request_dict={},
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)
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if lro_response.get('done', None):
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break
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time.sleep(1)
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max_retry_attempt -= 1
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# Get session resource
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get_session_api_response = self.api_client.request(
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http_method='GET',
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path=f'reasoningEngines/{reasoning_engine_id}/sessions/{session_id}',
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request_dict={},
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)
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update_timestamp = isoparse(
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get_session_api_response['updateTime']
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).timestamp()
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session = Session(
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app_name=str(app_name),
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user_id=str(user_id),
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id=str(session_id),
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state=get_session_api_response.get('sessionState', {}),
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last_update_time=update_timestamp,
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)
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return session
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@override
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async def get_session(
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self,
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*,
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app_name: str,
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user_id: str,
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session_id: str,
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config: Optional[GetSessionConfig] = None,
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) -> Optional[Session]:
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reasoning_engine_id = _parse_reasoning_engine_id(app_name)
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# Get session resource
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get_session_api_response = self.api_client.request(
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http_method='GET',
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path=f'reasoningEngines/{reasoning_engine_id}/sessions/{session_id}',
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request_dict={},
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)
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session_id = get_session_api_response['name'].split('/')[-1]
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update_timestamp = isoparse(
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get_session_api_response['updateTime']
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).timestamp()
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session = Session(
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app_name=str(app_name),
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user_id=str(user_id),
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id=str(session_id),
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state=get_session_api_response.get('sessionState', {}),
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last_update_time=update_timestamp,
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)
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list_events_api_response = self.api_client.request(
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http_method='GET',
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path=f'reasoningEngines/{reasoning_engine_id}/sessions/{session_id}/events',
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request_dict={},
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)
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# Handles empty response case
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if list_events_api_response.get('httpHeaders', None):
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return session
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session.events = [
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_from_api_event(event)
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for event in list_events_api_response['sessionEvents']
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]
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session.events = [
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event for event in session.events if event.timestamp <= update_timestamp
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]
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session.events.sort(key=lambda event: event.timestamp)
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if config:
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if config.num_recent_events:
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session.events = session.events[-config.num_recent_events :]
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elif config.after_timestamp:
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i = len(session.events) - 1
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while i >= 0:
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if session.events[i].timestamp < config.after_timestamp:
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break
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i -= 1
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if i >= 0:
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session.events = session.events[i:]
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return session
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@override
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async def list_sessions(
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self, *, app_name: str, user_id: str
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) -> ListSessionsResponse:
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reasoning_engine_id = _parse_reasoning_engine_id(app_name)
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api_response = self.api_client.request(
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http_method='GET',
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path=f'reasoningEngines/{reasoning_engine_id}/sessions?filter=user_id={user_id}',
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request_dict={},
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)
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# Handles empty response case
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if api_response.get('httpHeaders', None):
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return ListSessionsResponse()
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sessions = []
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for api_session in api_response['sessions']:
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session = Session(
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app_name=app_name,
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user_id=user_id,
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id=api_session['name'].split('/')[-1],
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state={},
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last_update_time=isoparse(api_session['updateTime']).timestamp(),
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)
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sessions.append(session)
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return ListSessionsResponse(sessions=sessions)
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async def delete_session(
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self, *, app_name: str, user_id: str, session_id: str
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) -> None:
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reasoning_engine_id = _parse_reasoning_engine_id(app_name)
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self.api_client.request(
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http_method='DELETE',
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path=f'reasoningEngines/{reasoning_engine_id}/sessions/{session_id}',
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request_dict={},
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)
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@override
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async def append_event(self, session: Session, event: Event) -> Event:
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# Update the in-memory session.
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await super().append_event(session=session, event=event)
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reasoning_engine_id = _parse_reasoning_engine_id(session.app_name)
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self.api_client.request(
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http_method='POST',
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path=f'reasoningEngines/{reasoning_engine_id}/sessions/{session.id}:appendEvent',
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request_dict=_convert_event_to_json(event),
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)
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return event
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def _convert_event_to_json(event: Event):
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metadata_json = {
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'partial': event.partial,
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'turn_complete': event.turn_complete,
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'interrupted': event.interrupted,
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'branch': event.branch,
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'long_running_tool_ids': (
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list(event.long_running_tool_ids)
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if event.long_running_tool_ids
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else None
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),
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}
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if event.grounding_metadata:
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metadata_json['grounding_metadata'] = event.grounding_metadata.model_dump(
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exclude_none=True
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)
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event_json = {
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'author': event.author,
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'invocation_id': event.invocation_id,
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'timestamp': {
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'seconds': int(event.timestamp),
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'nanos': int(
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(event.timestamp - int(event.timestamp)) * 1_000_000_000
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),
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},
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'error_code': event.error_code,
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'error_message': event.error_message,
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'event_metadata': metadata_json,
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}
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if event.actions:
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actions_json = {
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'skip_summarization': event.actions.skip_summarization,
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'state_delta': event.actions.state_delta,
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'artifact_delta': event.actions.artifact_delta,
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'transfer_agent': event.actions.transfer_to_agent,
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'escalate': event.actions.escalate,
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'requested_auth_configs': event.actions.requested_auth_configs,
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}
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event_json['actions'] = actions_json
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if event.content:
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event_json['content'] = _session_util.encode_content(event.content)
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if event.error_code:
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event_json['error_code'] = event.error_code
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if event.error_message:
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event_json['error_message'] = event.error_message
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return event_json
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def _from_api_event(api_event: dict) -> Event:
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event_actions = EventActions()
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if api_event.get('actions', None):
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event_actions = EventActions(
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skip_summarization=api_event['actions'].get('skipSummarization', None),
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state_delta=api_event['actions'].get('stateDelta', {}),
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artifact_delta=api_event['actions'].get('artifactDelta', {}),
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transfer_to_agent=api_event['actions'].get('transferAgent', None),
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escalate=api_event['actions'].get('escalate', None),
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requested_auth_configs=api_event['actions'].get(
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'requestedAuthConfigs', {}
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),
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)
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event = Event(
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id=api_event['name'].split('/')[-1],
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invocation_id=api_event['invocationId'],
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author=api_event['author'],
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actions=event_actions,
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content=_session_util.decode_content(api_event.get('content', None)),
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timestamp=isoparse(api_event['timestamp']).timestamp(),
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error_code=api_event.get('errorCode', None),
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error_message=api_event.get('errorMessage', None),
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)
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if api_event.get('eventMetadata', None):
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long_running_tool_ids_list = api_event['eventMetadata'].get(
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'longRunningToolIds', None
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)
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event.partial = api_event['eventMetadata'].get('partial', None)
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event.turn_complete = api_event['eventMetadata'].get('turnComplete', None)
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event.interrupted = api_event['eventMetadata'].get('interrupted', None)
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event.branch = api_event['eventMetadata'].get('branch', None)
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event.grounding_metadata = api_event['eventMetadata'].get(
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'groundingMetadata', None
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)
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event.long_running_tool_ids = (
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set(long_running_tool_ids_list) if long_running_tool_ids_list else None
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)
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return event
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def _parse_reasoning_engine_id(app_name: str):
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if app_name.isdigit():
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return app_name
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pattern = r'^projects/([a-zA-Z0-9-_]+)/locations/([a-zA-Z0-9-_]+)/reasoningEngines/(\d+)$'
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match = re.fullmatch(pattern, app_name)
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if not bool(match):
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raise ValueError(
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f'App name {app_name} is not valid. It should either be the full'
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' ReasoningEngine resource name, or the reasoning engine id.'
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)
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return match.groups()[-1]
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