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편집 파일: instrumentation.cpython-37.pyc
B ��4]8 � @ s d Z ddlZddlmZ ddlmZ ddlmZ ddlmZ ddlm Z dd lm Z dd l mZ dd l mZ dd l mZ dd l mZ ddl mZ dZdd� ZegZG dd� de�Ze� e _Zee _G dd� de�ZG dd� de�Zdd� Zdd� Z d d � Z dS ) a� Extensible class instrumentation. The :mod:`sqlalchemy.ext.instrumentation` package provides for alternate systems of class instrumentation within the ORM. Class instrumentation refers to how the ORM places attributes on the class which maintain data and track changes to that data, as well as event hooks installed on the class. .. note:: The extension package is provided for the benefit of integration with other object management packages, which already perform their own instrumentation. It is not intended for general use. For examples of how the instrumentation extension is used, see the example :ref:`examples_instrumentation`. � N� )�util)� attributes)�base)� collections)�exc)�instrumentation)�_default_dict_getter)�_default_manager_getter)�_default_state_getter)� ClassManager)�InstrumentationFactoryZ __sa_instrumentation_manager__c C s t | td�S )z;Find user-specified instrumentation management for a class.N)�getattr�INSTRUMENTATION_MANAGER)�cls� r �Q/opt/alt/python37/lib64/python3.7/site-packages/sqlalchemy/ext/instrumentation.py�%find_native_user_instrumentation_hook; s r c st e Zd ZdZe�� Ze�� Ze�� ZdZ dd� Z dd� Z dd� Z d d � Z � fd d �Zd d� Zdd� Zdd� Z� ZS )� ExtendedInstrumentationRegistryz�Extends :class:`.InstrumentationFactory` with additional bookkeeping, to accommodate multiple types of class managers. Fc C s: x4t D ](}||�}|d k r| �||�}||fS qW dS d S )N)NN)�instrumentation_finders�_extended_class_manager)�self�class_�finder�factory�managerr r r �_locate_extended_factory] s z8ExtendedInstrumentationRegistry._locate_extended_factoryc C s0 | � |��|g�}|r,td|jt|�f ��d S )NzRmultiple instrumentation implementations specified in %s inheritance hierarchy: %r)�!_collect_management_factories_for� difference� TypeError�__name__�list)r r r Zexisting_factoriesr r r �_check_conflictsf s z0ExtendedInstrumentationRegistry._check_conflictsc C sd ||�}t |t�s t||�}|tkr6| js6d| _t� |�� | j|< |�� | j|< |� � | j |< |S )NT) � isinstancer � _ClassInstrumentationAdapter� _extended� _install_instrumented_lookups�manager_getter�_manager_finders� state_getter�_state_finders� dict_getter� _dict_finders)r r r r r r r r q s z7ExtendedInstrumentationRegistry._extended_class_managerc C sz t �|�}t� }xZ|D ]R}| �|�}|dk r:|�|j� qx"tD ]}||�}|dk r@P q@W d}|�|� qW |�d� |S )ac Return a collection of factories in play or specified for a hierarchy. Traverses the entire inheritance graph of a cls and returns a collection of instrumentation factories for those classes. Factories are extracted from active ClassManagers, if available, otherwise instrumentation_finders is consulted. N)r Zclass_hierarchy�set�manager_of_class�addr r �discard)r r Z hierarchyZ factories�memberr r r r r r r � s zAExtendedInstrumentationRegistry._collect_management_factories_forc s6 || j kr"| j |= | j|= | j|= tt| ��|� d S )N)r( r* r, �superr � unregister)r r )� __class__r r r3 � s z*ExtendedInstrumentationRegistry.unregisterc C s@ |d kr d S y| j �|t�}W n tk r2 d S X ||�S d S )N)r( �getr r )r r r r r r r. � s z0ExtendedInstrumentationRegistry.manager_of_classc C s$ |d krt d��| j�|jt�|�S )Nz None has no persistent state.)�AttributeErrorr* r5 r4 r )r �instancer r r �state_of� s z(ExtendedInstrumentationRegistry.state_ofc C s$ |d krt d��| j�|jt�|�S )Nz None has no persistent state.)r6 r, r5 r4 r )r r7 r r r �dict_of� s z'ExtendedInstrumentationRegistry.dict_of)r � __module__� __qualname__�__doc__�weakref�WeakKeyDictionaryr( r* r, r% r r" r r r3 r. r8 r9 � __classcell__r r )r4 r r Q s r c @ s� e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Zd d � Zd d � Zd d!� Zd"d#� Zd$S )%�InstrumentationManageraW User-defined class instrumentation extension. :class:`.InstrumentationManager` can be subclassed in order to change how class instrumentation proceeds. This class exists for the purposes of integration with other object management frameworks which would like to entirely modify the instrumentation methodology of the ORM, and is not intended for regular usage. For interception of class instrumentation events, see :class:`.InstrumentationEvents`. The API for this class should be considered as semi-stable, and may change slightly with new releases. c C s d S )Nr )r r r r r �__init__� s z InstrumentationManager.__init__c C s t |d|� d S )N�_default_class_manager)�setattr)r r r r r r �manage� s z InstrumentationManager.managec C s t |d� d S )NrB )�delattr)r r r r r r �dispose� s z InstrumentationManager.disposec C s dd� }|S )Nc S s | j S )N)rB )r r r r r5 � s z2InstrumentationManager.manager_getter.<locals>.getr )r r r5 r r r r' � s z%InstrumentationManager.manager_getterc C s d S )Nr )r r �key�instr r r �instrument_attribute� s z+InstrumentationManager.instrument_attributec C s d S )Nr )r r rG rH r r r �post_configure_attribute� s z/InstrumentationManager.post_configure_attributec C s t |||� d S )N)rC )r r rG rH r r r �install_descriptor� s z)InstrumentationManager.install_descriptorc C s t ||� d S )N)rE )r r rG r r r �uninstall_descriptor� s z+InstrumentationManager.uninstall_descriptorc C s t |||� d S )N)rC )r r rG �implementationr r r �install_member� s z%InstrumentationManager.install_memberc C s t ||� d S )N)rE )r r rG r r r �uninstall_member� s z'InstrumentationManager.uninstall_memberc C s t �|�S )N)r Zprepare_instrumentation)r r rG �collection_classr r r �instrument_collection_class� s z2InstrumentationManager.instrument_collection_classc C s |j S )N)�__dict__)r r r7 r r r �get_instance_dict� s z(InstrumentationManager.get_instance_dictc C s d S )Nr )r r r7 r r r �initialize_instance_dict s z/InstrumentationManager.initialize_instance_dictc C s t |d|� d S )N�_default_state)rC )r r r7 �stater r r � install_state s z$InstrumentationManager.install_statec C s t |d� d S )NrU )rE )r r r7 r r r � remove_state s z#InstrumentationManager.remove_statec C s dd� S )Nc S s t | d�S )NrU )r )r7 r r r �<lambda> � z5InstrumentationManager.state_getter.<locals>.<lambda>r )r r r r r r) s z#InstrumentationManager.state_getterc s � �fdd�S )Nc s �� � | �S )N)rS )rH )r r r r rY rZ z4InstrumentationManager.dict_getter.<locals>.<lambda>r )r r r )r r r r+ s z"InstrumentationManager.dict_getterN)r r: r; r< rA rD rF r' rI rJ rK rL rN rO rQ rS rT rW rX r) r+ r r r r r@ � s$ r@ c s� e Zd ZdZdd� Zdd� Zdd� Zdd � Zd*d d �Z� fd d�Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zd+d d �Zd d � Zd,d d!�Zd"d#� Zd$d%� Zd&d'� Zd(d)� Z� ZS )-r$ z?Adapts a user-defined InstrumentationManager to a ClassManager.c C s2 || _ | j �|�| _| j �|�| _t�| |� d S )N)�_adaptedr) � _get_stater+ � _get_dictr rA )r r �overrider r r rA s z%_ClassInstrumentationAdapter.__init__c C s | j �| j| � d S )N)r[ rD r )r r r r rD s z#_ClassInstrumentationAdapter.managec C s | j �| j� d S )N)r[ rF r )r r r r rF s z$_ClassInstrumentationAdapter.disposec C s | j �| j�S )N)r[ r' r )r r r r r' s z+_ClassInstrumentationAdapter.manager_getterFc C s* t �| |||� |s&| j�| j||� d S )N)r rI r[ r )r rG rH Z propagatedr r r rI # s z1_ClassInstrumentationAdapter.instrument_attributec s* t t| ��|� | j�| j|| | � d S )N)r2 r$ rJ r[ r )r rG )r4 r r rJ ( s z5_ClassInstrumentationAdapter.post_configure_attributec C s | j �| j||� d S )N)r[ rK r )r rG rH r r r rK , s z/_ClassInstrumentationAdapter.install_descriptorc C s | j �| j|� d S )N)r[ rL r )r rG r r r rL / s z1_ClassInstrumentationAdapter.uninstall_descriptorc C s | j �| j||� d S )N)r[ rN r )r rG rM r r r rN 2 s z+_ClassInstrumentationAdapter.install_memberc C s | j �| j|� d S )N)r[ rO r )r rG r r r rO 5 s z-_ClassInstrumentationAdapter.uninstall_memberc C s | j �| j||�S )N)r[ rQ r )r rG rP r r r rQ 8 s z8_ClassInstrumentationAdapter.instrument_collection_classc C s2 t | jdd �}|r ||||�S t�| |||�S d S )N�initialize_collection)r r[ r r_ )r rG rV r Zdelegater r r r_ = s z2_ClassInstrumentationAdapter.initialize_collectionNc C s | j �| j �}| �||� |S )N)r �__new__�setup_instance)r rV r7 r r r � new_instanceF s z)_ClassInstrumentationAdapter.new_instancec C s | � |�rdS | �|�S dS )z�Install a default InstanceState if none is present. A private convenience method used by the __init__ decorator. FN)� has_statera )r r7 r r r �_new_state_if_noneK s z/_ClassInstrumentationAdapter._new_state_if_nonec C s: | j �| j|� |d kr$| �|| �}| j �| j||� |S )N)r[ rT r Z_state_constructorrW )r r7 rV r r r ra U s z+_ClassInstrumentationAdapter.setup_instancec C s | j �| j|� d S )N)r[ rX r )r r7 r r r �teardown_instance_ s z._ClassInstrumentationAdapter.teardown_instancec C s. y| � |� W n tjk r$ dS X dS d S )NFT)r\ �orm_excZNO_STATE)r r7 r r r rc b s z&_ClassInstrumentationAdapter.has_statec C s | j S )N)r\ )r r r r r) j s z)_ClassInstrumentationAdapter.state_getterc C s | j S )N)r] )r r r r r+ m s z(_ClassInstrumentationAdapter.dict_getter)F)N)N)r r: r; r< rA rD rF r' rI rJ rK rL rN rO rQ r_ rb rd ra re rc r) r+ r? r r )r4 r r$ s( r$ c C s t ttjtjtjd�� dS )a� Replace global class/object management functions with ExtendedInstrumentationRegistry implementations, which allow multiple types of class managers to be present, at the cost of performance. This function is called only by ExtendedInstrumentationRegistry and unit tests specific to this behavior. The _reinstall_default_lookups() function can be called after this one to re-establish the default functions. )�instance_state� instance_dictr. N)�_install_lookups�dict�_instrumentation_factoryr8 r9 r. r r r r r& q s r& c C s t ttttd�� dt_dS )zRestore simplified lookups.)rg rh r. FN)ri rj r r r rk r% r r r r �_reinstall_default_lookups� s rl c C sR | d a | d a| d at t_ t_ t_ t t_ t_t_t t_ t_t_d S )Nrg rh r. )rg rh r. �orm_baser �orm_instrumentation)Zlookupsr r r ri � s ri ) r< r= � r Zormr r rm r r rf r rn Zorm.instrumentationr r r r r r r r r rk �objectr@ r$ r& rl ri r r r r �<module> s. o La