관리-도구
편집 파일: characteristics.cpython-38.pyc
U -?�f� � @ s� d dl mZ d dlZd dlZd dlmZ d dlmZ ejr^ddlmZ ddl m Z ddl m Z G d d � d ej �Z G d d � d e �ZG d d� de �ZdS )� )� annotationsN)�Any)�ClassVar� )� Connection)�DBAPIConnection)�Dialectc @ s� e Zd ZU dZdZdZded< ejdddd �d d ��Z ejddd dd �dd��Z dddd dd�dd�Z ejddd d �dd��Z dddd d�dd�Z dS )�ConnectionCharacteristica� An abstract base for an object that can set, get and reset a per-connection characteristic, typically one that gets reset when the connection is returned to the connection pool. transaction isolation is the canonical example, and the ``IsolationLevelCharacteristic`` implementation provides this for the ``DefaultDialect``. The ``ConnectionCharacteristic`` class should call upon the ``Dialect`` for the implementation of each method. The object exists strictly to serve as a dialect visitor that can be placed into the ``DefaultDialect.connection_characteristics`` dictionary where it will take effect for calls to :meth:`_engine.Connection.execution_options` and related APIs. .. versionadded:: 1.4 � F�ClassVar[bool]� transactionalr r �None��dialect� dbapi_conn�returnc C s dS )zNReset the characteristic on the DBAPI connection to its default value.Nr ��selfr r r r �Q/opt/hc_python/lib64/python3.8/site-packages/sqlalchemy/engine/characteristics.py�reset_characteristic, s z-ConnectionCharacteristic.reset_characteristicr �r r �valuer c C s dS )z<set characteristic on the DBAPI connection to a given value.Nr �r r r r r r r �set_characteristic3 s z+ConnectionCharacteristic.set_characteristicr �r �connr r r c C s | � |||� dS )z�set characteristic on the :class:`_engine.Connection` to a given value. .. versionadded:: 2.0.30 - added to support elements that are local to the :class:`_engine.Connection` itself. N)r �r r r r r r r r � set_connection_characteristic9 s z6ConnectionCharacteristic.set_connection_characteristicc C s dS )zXGiven a DBAPI connection, get the current value of the characteristic. Nr r r r r �get_characteristicI s z+ConnectionCharacteristic.get_characteristic�r r r r c C s | � ||�S )z�Given a :class:`_engine.Connection`, get the current value of the characteristic. .. versionadded:: 2.0.30 - added to support elements that are local to the :class:`_engine.Connection` itself. )r �r r r r r r r � get_connection_characteristicR s z6ConnectionCharacteristic.get_connection_characteristicN)�__name__� __module__� __qualname__�__doc__� __slots__r �__annotations__�abc�abstractmethodr r r r r! r r r r r s r c @ sV e Zd ZU dZdZded< dddd�d d �Zddd dd �d d�Zddd d�dd�ZdS )� IsolationLevelCharacteristicz0Manage the isolation level on a DBAPI connectionTr r r r r r c C s |� |� d S �N)Zreset_isolation_levelr r r r r d s z1IsolationLevelCharacteristic.reset_characteristicr r c C s |� ||� d S r+ )Z _assert_and_set_isolation_levelr r r r r i s z/IsolationLevelCharacteristic.set_characteristicc C s |� |�S r+ )Zget_isolation_levelr r r r r n s z/IsolationLevelCharacteristic.get_characteristicN) r" r# r$ r% r r' r r r r r r r r* _ s r* c @ s� e Zd ZU dZdZded< dddd�d d �Zddd dd �d d�Zdddd dd�dd�Zddd d�dd�Z dddd d�dd�Z dS )�LoggingTokenCharacteristiczgManage the 'logging_token' option of a :class:`_engine.Connection`. .. versionadded:: 2.0.30 Fr r r r r r c C s d S r+ r r r r r r } s z/LoggingTokenCharacteristic.reset_characteristicr r c C s t � �d S r+ ��NotImplementedErrorr r r r r � s z-LoggingTokenCharacteristic.set_characteristicr r c s � r� fdd�|_ n|` d S )Nc s d� | f S )Nz[%s] %sr )�msg�r r r �<lambda>� � zJLoggingTokenCharacteristic.set_connection_characteristic.<locals>.<lambda>)Z_message_formatterr r r0 r r � s z8LoggingTokenCharacteristic.set_connection_characteristicc C s t � �d S r+ r- r r r r r � s z-LoggingTokenCharacteristic.get_characteristicr c C s |j �dd �S )NZ logging_token)Z_execution_options�getr r r r r! � s z8LoggingTokenCharacteristic.get_connection_characteristicN) r" r# r$ r% r r' r r r r r! r r r r r, t s r, )� __future__r r( �typingr r � TYPE_CHECKING�baser Z interfacesr r �ABCr r* r, r r r r �<module> s K