zaqar/marconi/queues/bootstrap.py

71 lines
2.3 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.
from stevedore import driver
from marconi.common import config
from marconi.common import decorators
from marconi.common import exceptions
from marconi.openstack.common import log
from marconi.queues import transport # NOQA
PROJECT_CFG = config.project('marconi', 'marconi-queues')
CFG = config.namespace('queues:drivers').from_options(
transport='wsgi',
storage='sqlite')
LOG = log.getLogger(__name__)
class Bootstrap(object):
"""Defines the Marconi bootstrapper.
The bootstrap loads up drivers per a given configuration, and
manages their lifetimes.
"""
def __init__(self, config_file=None, cli_args=None):
PROJECT_CFG.load(filename=config_file, args=cli_args)
log.setup('marconi')
@decorators.lazy_property(write=False)
def storage(self):
LOG.debug(_(u'Loading Storage Driver'))
try:
mgr = driver.DriverManager('marconi.queues.storage',
CFG.storage,
invoke_on_load=True)
return mgr.driver
except RuntimeError as exc:
LOG.exception(exc)
raise exceptions.InvalidDriver(exc)
@decorators.lazy_property(write=False)
def transport(self):
LOG.debug(_(u'Loading Transport Driver'))
try:
mgr = driver.DriverManager('marconi.queues.transport',
CFG.transport,
invoke_on_load=True,
invoke_args=[self.storage])
return mgr.driver
except RuntimeError as exc:
LOG.exception(exc)
raise exceptions.InvalidDriver(exc)
def run(self):
self.transport.listen()