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104 lines
3.4 KiB
Python
104 lines
3.4 KiB
Python
import logging
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from abc import ABC
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from typing import Any, Callable, List, Optional, Union
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from sqlalchemy import URL
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from dbgpt.component import BaseComponent, ComponentType, SystemApp
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from dbgpt.storage.metadata import DatabaseManager
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logger = logging.getLogger(__name__)
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class BaseServe(BaseComponent, ABC):
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"""Base serve component for DB-GPT"""
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name = "dbgpt_serve_base"
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def __init__(
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self,
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system_app: SystemApp,
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api_prefix: str | List[str],
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api_tags: List[str],
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db_url_or_db: Union[str, URL, DatabaseManager] = None,
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try_create_tables: Optional[bool] = False,
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):
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self._system_app = system_app
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self._api_prefix = api_prefix
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self._api_tags = api_tags
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self._db_url_or_db = db_url_or_db
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self._try_create_tables = try_create_tables
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self._not_create_table = True
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self._app_has_initiated = False
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def create_or_get_db_manager(self) -> DatabaseManager:
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"""Create or get the database manager.
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This method must be called after the application is initialized
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Returns:
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DatabaseManager: The database manager
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"""
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from dbgpt.storage.metadata import Model, UnifiedDBManagerFactory, db
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# If you need to use the database, you can get the database manager here
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db_manager_factory: UnifiedDBManagerFactory = self._system_app.get_component(
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ComponentType.UNIFIED_METADATA_DB_MANAGER_FACTORY,
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UnifiedDBManagerFactory,
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default_component=None,
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)
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if db_manager_factory is not None and db_manager_factory.create():
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init_db = db_manager_factory.create()
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else:
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init_db = self._db_url_or_db or db
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init_db = DatabaseManager.build_from(init_db, base=Model)
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if self._try_create_tables and self._not_create_table:
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try:
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init_db.create_all()
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except Exception as e:
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logger.warning(f"Failed to create tables: {e}")
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finally:
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self._not_create_table = False
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return init_db
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@classmethod
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def get_current_serve(cls, system_app: SystemApp) -> Optional["BaseServe"]:
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"""Get the current serve component.
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None if the serve component is not exist.
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Args:
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system_app (SystemApp): The system app
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Returns:
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Optional[BaseServe]: The current serve component.
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"""
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return cls.get_instance(system_app, default_component=None)
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@classmethod
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def call_on_current_serve(
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cls,
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system_app: SystemApp,
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func: Callable[["BaseServe"], Optional[Any]],
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default_value: Optional[Any] = None,
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) -> Optional[Any]:
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"""Call the function on the current serve component.
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Return default_value if the serve component is not exist or the function return None.
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Args:
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system_app (SystemApp): The system app
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func (Callable[[BaseServe], Any]): The function to call
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default_value (Optional[Any], optional): The default value. Defaults to None.
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Returns:
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Optional[Any]: The result of the function
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"""
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serve = cls.get_current_serve(system_app)
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if not serve:
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return default_value
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result = func(serve)
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if not result:
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result = default_value
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return result
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