adk-python/src/google/adk/artifacts/base_artifact_service.py
hangfei 9827820143 Agent Development Kit(ADK)
An easy-to-use and powerful framework to build AI agents.
2025-04-08 17:25:47 +00:00

129 lines
3.4 KiB
Python

# Copyright 2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Abstract base class for artifact services."""
from abc import ABC
from abc import abstractmethod
from typing import Optional
from google.genai import types
class BaseArtifactService(ABC):
"""Abstract base class for artifact services."""
@abstractmethod
def save_artifact(
self,
*,
app_name: str,
user_id: str,
session_id: str,
filename: str,
artifact: types.Part,
) -> int:
"""Saves an artifact to the artifact service storage.
The artifact is a file identified by the app name, user ID, session ID, and
filename. After saving the artifact, a revision ID is returned to identify
the artifact version.
Args:
app_name: The app name.
user_id: The user ID.
session_id: The session ID.
filename: The filename of the artifact.
artifact: The artifact to save.
Returns:
The revision ID. The first version of the artifact has a revision ID of 0.
This is incremented by 1 after each successful save.
"""
@abstractmethod
def load_artifact(
self,
*,
app_name: str,
user_id: str,
session_id: str,
filename: str,
version: Optional[int] = None,
) -> Optional[types.Part]:
"""Gets an artifact from the artifact service storage.
The artifact is a file identified by the app name, user ID, session ID, and
filename.
Args:
app_name: The app name.
user_id: The user ID.
session_id: The session ID.
filename: The filename of the artifact.
version: The version of the artifact. If None, the latest version will be
returned.
Returns:
The artifact or None if not found.
"""
pass
@abstractmethod
def list_artifact_keys(
self, *, app_name: str, user_id: str, session_id: str
) -> list[str]:
"""Lists all the artifact filenames within a session.
Args:
app_name: The name of the application.
user_id: The ID of the user.
session_id: The ID of the session.
Returns:
A list of all artifact filenames within a session.
"""
pass
@abstractmethod
def delete_artifact(
self, *, app_name: str, user_id: str, session_id: str, filename: str
) -> None:
"""Deletes an artifact.
Args:
app_name: The name of the application.
user_id: The ID of the user.
session_id: The ID of the session.
filename: The name of the artifact file.
"""
pass
@abstractmethod
def list_versions(
self, *, app_name: str, user_id: str, session_id: str, filename: str
) -> list[int]:
"""Lists all versions of an artifact.
Args:
app_name: The name of the application.
user_id: The ID of the user.
session_id: The ID of the session.
filename: The name of the artifact file.
Returns:
A list of all available versions of the artifact.
"""
pass