Source code for google.appengine.api.rdbms_mysqldb

#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# 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.
#




"""Relational database API stub that uses the MySQLdb DB-API library.

Also see the rdbms module.
"""








import logging
import os

_POTENTIAL_SOCKET_LOCATIONS = (
    '/tmp/mysql.sock',
    '/var/run/mysqld/mysqld.sock',
    '/var/lib/mysql/mysql.sock',
    '/var/run/mysql/mysql.sock',
    '/var/mysql/mysql.sock',
    )


_connect_kwargs = {}



_OS_NAME = os.name


[docs]def SetConnectKwargs(**kwargs): """Sets the keyword args (host, user, etc) to pass to MySQLdb.connect().""" global _connect_kwargs _connect_kwargs = dict(kwargs)
[docs]def FindUnixSocket(): """Find the Unix socket for MySQL by scanning some known locations. Returns: If found, the path to the Unix socket, otherwise, None. """ for path in _POTENTIAL_SOCKET_LOCATIONS: if os.path.exists(path): return path
try: import google import MySQLdb from MySQLdb import * __import__('MySQLdb.constants', globals(), locals(), ['*']) except ImportError: def connect(instance=None, database=None): logging.error('The rdbms API (Google Cloud SQL) is not available because ' 'the MySQLdb library could not be loaded. Please see the SDK ' 'documentation for installation instructions.') raise NotImplementedError('Unable to find the MySQLdb library') else:
[docs] def connect(instance=None, database=None, **kwargs): merged_kwargs = _connect_kwargs.copy() if database: merged_kwargs['db'] = database merged_kwargs.update(kwargs) if 'password' in merged_kwargs: merged_kwargs['passwd'] = merged_kwargs.pop('password') host = merged_kwargs.get('host') if ((not host or host == 'localhost') and not merged_kwargs.get('unix_socket') and _OS_NAME == 'posix'): socket = FindUnixSocket() if socket: merged_kwargs['unix_socket'] = socket else: logging.warning( 'Unable to find MySQL socket file. Use --mysql_socket to ' 'specify its location manually.') logging.info('Connecting to MySQL with kwargs %r', merged_kwargs) try: return MySQLdb.connect(**merged_kwargs) except MySQLdb.Error: logging.critical( 'MySQL connection failed! Ensure that you have provided correct ' 'values for the --mysql_* flags when running dev_appserver.py') raise
[docs]def set_instance(instance): logging.info('set_instance() is a noop in dev_appserver.')

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