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authorcyfraeviolae <cyfraeviolae>2024-04-03 03:10:44 -0400
committercyfraeviolae <cyfraeviolae>2024-04-03 03:10:44 -0400
commit6d7ba58f880be618ade07f8ea080fe8c4bf8a896 (patch)
treeb1c931051ffcebd2bd9d61d98d6233ffa289bbce /venv/lib/python3.11/site-packages/sqlalchemy/log.py
parent4f884c9abc32990b4061a1bb6997b4b37e58ea0b (diff)
venv
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+# log.py
+# Copyright (C) 2006-2024 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+# Includes alterations by Vinay Sajip vinay_sajip@yahoo.co.uk
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+"""Logging control and utilities.
+
+Control of logging for SA can be performed from the regular python logging
+module. The regular dotted module namespace is used, starting at
+'sqlalchemy'. For class-level logging, the class name is appended.
+
+The "echo" keyword parameter, available on SQLA :class:`_engine.Engine`
+and :class:`_pool.Pool` objects, corresponds to a logger specific to that
+instance only.
+
+"""
+from __future__ import annotations
+
+import logging
+import sys
+from typing import Any
+from typing import Optional
+from typing import overload
+from typing import Set
+from typing import Type
+from typing import TypeVar
+from typing import Union
+
+from .util import py311
+from .util import py38
+from .util.typing import Literal
+
+
+if py38:
+ STACKLEVEL = True
+ # needed as of py3.11.0b1
+ # #8019
+ STACKLEVEL_OFFSET = 2 if py311 else 1
+else:
+ STACKLEVEL = False
+ STACKLEVEL_OFFSET = 0
+
+_IT = TypeVar("_IT", bound="Identified")
+
+_EchoFlagType = Union[None, bool, Literal["debug"]]
+
+# set initial level to WARN. This so that
+# log statements don't occur in the absence of explicit
+# logging being enabled for 'sqlalchemy'.
+rootlogger = logging.getLogger("sqlalchemy")
+if rootlogger.level == logging.NOTSET:
+ rootlogger.setLevel(logging.WARN)
+
+
+def _add_default_handler(logger: logging.Logger) -> None:
+ handler = logging.StreamHandler(sys.stdout)
+ handler.setFormatter(
+ logging.Formatter("%(asctime)s %(levelname)s %(name)s %(message)s")
+ )
+ logger.addHandler(handler)
+
+
+_logged_classes: Set[Type[Identified]] = set()
+
+
+def _qual_logger_name_for_cls(cls: Type[Identified]) -> str:
+ return (
+ getattr(cls, "_sqla_logger_namespace", None)
+ or cls.__module__ + "." + cls.__name__
+ )
+
+
+def class_logger(cls: Type[_IT]) -> Type[_IT]:
+ logger = logging.getLogger(_qual_logger_name_for_cls(cls))
+ cls._should_log_debug = lambda self: logger.isEnabledFor( # type: ignore[method-assign] # noqa: E501
+ logging.DEBUG
+ )
+ cls._should_log_info = lambda self: logger.isEnabledFor( # type: ignore[method-assign] # noqa: E501
+ logging.INFO
+ )
+ cls.logger = logger
+ _logged_classes.add(cls)
+ return cls
+
+
+_IdentifiedLoggerType = Union[logging.Logger, "InstanceLogger"]
+
+
+class Identified:
+ __slots__ = ()
+
+ logging_name: Optional[str] = None
+
+ logger: _IdentifiedLoggerType
+
+ _echo: _EchoFlagType
+
+ def _should_log_debug(self) -> bool:
+ return self.logger.isEnabledFor(logging.DEBUG)
+
+ def _should_log_info(self) -> bool:
+ return self.logger.isEnabledFor(logging.INFO)
+
+
+class InstanceLogger:
+ """A logger adapter (wrapper) for :class:`.Identified` subclasses.
+
+ This allows multiple instances (e.g. Engine or Pool instances)
+ to share a logger, but have its verbosity controlled on a
+ per-instance basis.
+
+ The basic functionality is to return a logging level
+ which is based on an instance's echo setting.
+
+ Default implementation is:
+
+ 'debug' -> logging.DEBUG
+ True -> logging.INFO
+ False -> Effective level of underlying logger (
+ logging.WARNING by default)
+ None -> same as False
+ """
+
+ # Map echo settings to logger levels
+ _echo_map = {
+ None: logging.NOTSET,
+ False: logging.NOTSET,
+ True: logging.INFO,
+ "debug": logging.DEBUG,
+ }
+
+ _echo: _EchoFlagType
+
+ __slots__ = ("echo", "logger")
+
+ def __init__(self, echo: _EchoFlagType, name: str):
+ self.echo = echo
+ self.logger = logging.getLogger(name)
+
+ # if echo flag is enabled and no handlers,
+ # add a handler to the list
+ if self._echo_map[echo] <= logging.INFO and not self.logger.handlers:
+ _add_default_handler(self.logger)
+
+ #
+ # Boilerplate convenience methods
+ #
+ def debug(self, msg: str, *args: Any, **kwargs: Any) -> None:
+ """Delegate a debug call to the underlying logger."""
+
+ self.log(logging.DEBUG, msg, *args, **kwargs)
+
+ def info(self, msg: str, *args: Any, **kwargs: Any) -> None:
+ """Delegate an info call to the underlying logger."""
+
+ self.log(logging.INFO, msg, *args, **kwargs)
+
+ def warning(self, msg: str, *args: Any, **kwargs: Any) -> None:
+ """Delegate a warning call to the underlying logger."""
+
+ self.log(logging.WARNING, msg, *args, **kwargs)
+
+ warn = warning
+
+ def error(self, msg: str, *args: Any, **kwargs: Any) -> None:
+ """
+ Delegate an error call to the underlying logger.
+ """
+ self.log(logging.ERROR, msg, *args, **kwargs)
+
+ def exception(self, msg: str, *args: Any, **kwargs: Any) -> None:
+ """Delegate an exception call to the underlying logger."""
+
+ kwargs["exc_info"] = 1
+ self.log(logging.ERROR, msg, *args, **kwargs)
+
+ def critical(self, msg: str, *args: Any, **kwargs: Any) -> None:
+ """Delegate a critical call to the underlying logger."""
+
+ self.log(logging.CRITICAL, msg, *args, **kwargs)
+
+ def log(self, level: int, msg: str, *args: Any, **kwargs: Any) -> None:
+ """Delegate a log call to the underlying logger.
+
+ The level here is determined by the echo
+ flag as well as that of the underlying logger, and
+ logger._log() is called directly.
+
+ """
+
+ # inline the logic from isEnabledFor(),
+ # getEffectiveLevel(), to avoid overhead.
+
+ if self.logger.manager.disable >= level:
+ return
+
+ selected_level = self._echo_map[self.echo]
+ if selected_level == logging.NOTSET:
+ selected_level = self.logger.getEffectiveLevel()
+
+ if level >= selected_level:
+ if STACKLEVEL:
+ kwargs["stacklevel"] = (
+ kwargs.get("stacklevel", 1) + STACKLEVEL_OFFSET
+ )
+
+ self.logger._log(level, msg, args, **kwargs)
+
+ def isEnabledFor(self, level: int) -> bool:
+ """Is this logger enabled for level 'level'?"""
+
+ if self.logger.manager.disable >= level:
+ return False
+ return level >= self.getEffectiveLevel()
+
+ def getEffectiveLevel(self) -> int:
+ """What's the effective level for this logger?"""
+
+ level = self._echo_map[self.echo]
+ if level == logging.NOTSET:
+ level = self.logger.getEffectiveLevel()
+ return level
+
+
+def instance_logger(
+ instance: Identified, echoflag: _EchoFlagType = None
+) -> None:
+ """create a logger for an instance that implements :class:`.Identified`."""
+
+ if instance.logging_name:
+ name = "%s.%s" % (
+ _qual_logger_name_for_cls(instance.__class__),
+ instance.logging_name,
+ )
+ else:
+ name = _qual_logger_name_for_cls(instance.__class__)
+
+ instance._echo = echoflag # type: ignore
+
+ logger: Union[logging.Logger, InstanceLogger]
+
+ if echoflag in (False, None):
+ # if no echo setting or False, return a Logger directly,
+ # avoiding overhead of filtering
+ logger = logging.getLogger(name)
+ else:
+ # if a specified echo flag, return an EchoLogger,
+ # which checks the flag, overrides normal log
+ # levels by calling logger._log()
+ logger = InstanceLogger(echoflag, name)
+
+ instance.logger = logger # type: ignore
+
+
+class echo_property:
+ __doc__ = """\
+ When ``True``, enable log output for this element.
+
+ This has the effect of setting the Python logging level for the namespace
+ of this element's class and object reference. A value of boolean ``True``
+ indicates that the loglevel ``logging.INFO`` will be set for the logger,
+ whereas the string value ``debug`` will set the loglevel to
+ ``logging.DEBUG``.
+ """
+
+ @overload
+ def __get__(
+ self, instance: Literal[None], owner: Type[Identified]
+ ) -> echo_property: ...
+
+ @overload
+ def __get__(
+ self, instance: Identified, owner: Type[Identified]
+ ) -> _EchoFlagType: ...
+
+ def __get__(
+ self, instance: Optional[Identified], owner: Type[Identified]
+ ) -> Union[echo_property, _EchoFlagType]:
+ if instance is None:
+ return self
+ else:
+ return instance._echo
+
+ def __set__(self, instance: Identified, value: _EchoFlagType) -> None:
+ instance_logger(instance, echoflag=value)