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# Copyright (C) 2012-2014 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Database factory."""
from __future__ import absolute_import, print_function, unicode_literals
__metaclass__ = type
__all__ = [
'DatabaseFactory',
'DatabaseTemporaryFactory',
'DatabaseTestingFactory',
]
import os
import types
from flufl.lock import Lock
from zope.component import getAdapter
from zope.interface import implementer
from zope.interface.verify import verifyObject
from mailman.config import config
from mailman.interfaces.database import (
IDatabase, IDatabaseFactory, ITemporaryDatabase)
from mailman.utilities.modules import call_name
@implementer(IDatabaseFactory)
class DatabaseFactory:
"""Create a new database."""
@staticmethod
def create():
"""See `IDatabaseFactory`."""
with Lock(os.path.join(config.LOCK_DIR, 'dbcreate.lck')):
database_class = config.database['class']
database = call_name(database_class)
verifyObject(IDatabase, database)
database.initialize()
database.load_migrations()
database.commit()
return database
def _reset(self):
"""See `IDatabase`."""
from mailman.database.model import ModelMeta
self.store.rollback()
self._pre_reset(self.store)
ModelMeta._reset(self.store)
self._post_reset(self.store)
self.store.commit()
@implementer(IDatabaseFactory)
class DatabaseTestingFactory:
"""Create a new database for testing."""
@staticmethod
def create():
"""See `IDatabaseFactory`."""
database_class = config.database['class']
database = call_name(database_class)
verifyObject(IDatabase, database)
database.initialize()
database.load_migrations()
database.commit()
# Make _reset() a bound method of the database instance.
database._reset = types.MethodType(_reset, database)
return database
@implementer(IDatabaseFactory)
class DatabaseTemporaryFactory:
"""Create a temporary database for some of the migration tests."""
@staticmethod
def create():
"""See `IDatabaseFactory`."""
database_class_name = config.database['class']
database = call_name(database_class_name)
verifyObject(IDatabase, database)
adapted_database = getAdapter(
database, ITemporaryDatabase, database.TAG)
return adapted_database
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