zaqar/marconi/storage/sqlite/driver.py

61 lines
1.6 KiB
Python

# Copyright (c) 2013 Rackspace, 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.
import sqlite3
from marconi.common import config
from marconi import storage
from marconi.storage.sqlite import controllers
cfg = config.namespace('drivers:storage:sqlite').from_options(
database=':memory:')
class Driver(storage.DriverBase):
def __init__(self):
self.__path = cfg.database
self.__conn = sqlite3.connect(self.__path)
self.__db = self.__conn.cursor()
self._run('''PRAGMA foreign_keys = ON''')
def _run(self, sql, *args):
return self.__db.execute(sql, args)
def _run_multiple(self, sql, it):
self.__db.executemany(sql, it)
def _get(self, sql, *args):
return self._run(sql, *args).fetchone()
def __enter__(self):
self._run('begin immediate')
def __exit__(self, exc_type, exc_value, traceback):
self.__conn.commit()
@property
def queue_controller(self):
return controllers.Queue(self)
@property
def message_controller(self):
return controllers.Message(self)
@property
def claim_controller(self):
return None