mirror of
https://github.com/EvolutionAPI/adk-python.git
synced 2025-07-15 19:52:55 -06:00
305 lines
9.0 KiB
Python
305 lines
9.0 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 copy
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import logging
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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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import uuid
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from typing_extensions import override
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from ..events.event import Event
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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 ListEventsResponse
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from .base_session_service import ListSessionsResponse
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from .session import Session
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from .state import State
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logger = logging.getLogger(__name__)
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class InMemorySessionService(BaseSessionService):
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"""An in-memory implementation of the session service."""
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def __init__(self):
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# A map from app name to a map from user ID to a map from session ID to
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# session.
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self.sessions: dict[str, dict[str, dict[str, Session]]] = {}
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# A map from app name to a map from user ID to a map from key to the value.
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self.user_state: dict[str, dict[str, dict[str, Any]]] = {}
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# A map from app name to a map from key to the value.
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self.app_state: dict[str, dict[str, Any]] = {}
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@override
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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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return self._create_session_impl(
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app_name=app_name,
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user_id=user_id,
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state=state,
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session_id=session_id,
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)
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def create_session_sync(
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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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logger.warning('Deprecated. Please migrate to the async method.')
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return self._create_session_impl(
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app_name=app_name,
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user_id=user_id,
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state=state,
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session_id=session_id,
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)
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def _create_session_impl(
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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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session_id = (
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session_id.strip()
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if session_id and session_id.strip()
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else str(uuid.uuid4())
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)
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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=session_id,
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state=state or {},
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last_update_time=time.time(),
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)
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if app_name not in self.sessions:
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self.sessions[app_name] = {}
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if user_id not in self.sessions[app_name]:
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self.sessions[app_name][user_id] = {}
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self.sessions[app_name][user_id][session_id] = session
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copied_session = copy.deepcopy(session)
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return self._merge_state(app_name, user_id, copied_session)
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@override
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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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) -> Session:
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return self._get_session_impl(
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app_name=app_name,
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user_id=user_id,
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session_id=session_id,
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config=config,
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)
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def get_session_sync(
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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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) -> Session:
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logger.warning('Deprecated. Please migrate to the async method.')
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return self._get_session_impl(
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app_name=app_name,
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user_id=user_id,
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session_id=session_id,
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config=config,
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)
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def _get_session_impl(
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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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) -> Session:
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if app_name not in self.sessions:
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return None
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if user_id not in self.sessions[app_name]:
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return None
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if session_id not in self.sessions[app_name][user_id]:
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return None
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session = self.sessions[app_name][user_id].get(session_id)
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copied_session = copy.deepcopy(session)
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if config:
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if config.num_recent_events:
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copied_session.events = copied_session.events[
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-config.num_recent_events :
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]
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if config.after_timestamp:
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i = len(copied_session.events) - 1
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while i >= 0:
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if copied_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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copied_session.events = copied_session.events[i + 1:]
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return self._merge_state(app_name, user_id, copied_session)
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def _merge_state(self, app_name: str, user_id: str, copied_session: Session):
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# Merge app state
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if app_name in self.app_state:
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for key in self.app_state[app_name].keys():
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copied_session.state[State.APP_PREFIX + key] = self.app_state[app_name][
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key
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]
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if (
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app_name not in self.user_state
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or user_id not in self.user_state[app_name]
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):
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return copied_session
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# Merge session state with user state.
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for key in self.user_state[app_name][user_id].keys():
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copied_session.state[State.USER_PREFIX + key] = self.user_state[app_name][
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user_id
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][key]
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return copied_session
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@override
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def list_sessions(
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self, *, app_name: str, user_id: str
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) -> ListSessionsResponse:
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return self._list_sessions_impl(app_name=app_name, user_id=user_id)
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def list_sessions_sync(
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self, *, app_name: str, user_id: str
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) -> ListSessionsResponse:
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logger.warning('Deprecated. Please migrate to the async method.')
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return self._list_sessions_impl(app_name=app_name, user_id=user_id)
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def _list_sessions_impl(
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self, *, app_name: str, user_id: str
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) -> ListSessionsResponse:
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empty_response = ListSessionsResponse()
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if app_name not in self.sessions:
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return empty_response
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if user_id not in self.sessions[app_name]:
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return empty_response
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sessions_without_events = []
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for session in self.sessions[app_name][user_id].values():
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copied_session = copy.deepcopy(session)
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copied_session.events = []
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copied_session.state = {}
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sessions_without_events.append(copied_session)
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return ListSessionsResponse(sessions=sessions_without_events)
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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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self._delete_session_impl(
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app_name=app_name, user_id=user_id, session_id=session_id
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)
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def delete_session_sync(
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self, *, app_name: str, user_id: str, session_id: str
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) -> None:
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logger.warning('Deprecated. Please migrate to the async method.')
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self._delete_session_impl(
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app_name=app_name, user_id=user_id, session_id=session_id
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)
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def _delete_session_impl(
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self, *, app_name: str, user_id: str, session_id: str
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) -> None:
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if (
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self._get_session_impl(
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app_name=app_name, user_id=user_id, session_id=session_id
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)
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is None
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):
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return None
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self.sessions[app_name][user_id].pop(session_id)
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@override
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def append_event(self, session: Session, event: Event) -> Event:
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return self._append_event_impl(session=session, event=event)
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def append_event_sync(self, session: Session, event: Event) -> Event:
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logger.warning('Deprecated. Please migrate to the async method.')
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return self._append_event_impl(session=session, event=event)
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def _append_event_impl(self, session: Session, event: Event) -> Event:
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# Update the in-memory session.
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super().append_event(session=session, event=event)
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session.last_update_time = event.timestamp
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# Update the storage session
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app_name = session.app_name
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user_id = session.user_id
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session_id = session.id
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if app_name not in self.sessions:
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return event
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if user_id not in self.sessions[app_name]:
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return event
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if session_id not in self.sessions[app_name][user_id]:
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return event
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if event.actions and event.actions.state_delta:
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for key in event.actions.state_delta:
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if key.startswith(State.APP_PREFIX):
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self.app_state.setdefault(app_name, {})[
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key.removeprefix(State.APP_PREFIX)
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] = event.actions.state_delta[key]
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if key.startswith(State.USER_PREFIX):
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self.user_state.setdefault(app_name, {}).setdefault(user_id, {})[
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key.removeprefix(State.USER_PREFIX)
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] = event.actions.state_delta[key]
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storage_session = self.sessions[app_name][user_id].get(session_id)
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super().append_event(session=storage_session, event=event)
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storage_session.last_update_time = event.timestamp
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return event
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@override
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def list_events(
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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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) -> ListEventsResponse:
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raise NotImplementedError()
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