106 lines
3.6 KiB
Python
106 lines
3.6 KiB
Python
# Copyright (c) 2013 Rackspace, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo.config import cfg
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from stevedore import driver
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from marconi.common.cache import cache as oslo_cache
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from marconi.common import decorators
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from marconi.common import exceptions
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from marconi.openstack.common import log
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from marconi.queues.storage import pipeline
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from marconi.queues.storage import sharding
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from marconi.queues.storage import utils as storage_utils
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from marconi.queues import transport # NOQA
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LOG = log.getLogger(__name__)
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_GENERAL_OPTIONS = [
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cfg.BoolOpt('sharding', default=False,
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help='Enable sharding across multiple storage backends'),
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cfg.BoolOpt('admin_mode', default=False,
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help='Activate endpoints to manage shard registry.'),
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]
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_DRIVER_OPTIONS = [
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cfg.StrOpt('transport', default='wsgi',
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help='Transport driver to use'),
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cfg.StrOpt('storage', default='sqlite',
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help='Storage driver to use'),
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]
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_DRIVER_GROUP = 'queues:drivers'
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class Bootstrap(object):
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"""Defines the Marconi bootstrapper.
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The bootstrap loads up drivers per a given configuration, and
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manages their lifetimes.
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"""
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def __init__(self, conf):
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self.conf = conf
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self.conf.register_opts(_GENERAL_OPTIONS)
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self.conf.register_opts(_DRIVER_OPTIONS, group=_DRIVER_GROUP)
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self.driver_conf = self.conf[_DRIVER_GROUP]
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log.setup('marconi')
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mode = 'admin' if conf.admin_mode else 'public'
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self._transport_type = 'marconi.queues.{0}.transport'.format(mode)
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@decorators.lazy_property(write=False)
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def storage(self):
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LOG.debug(_(u'Loading storage driver'))
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if self.conf.sharding:
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LOG.debug(_(u'Storage sharding enabled'))
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storage_driver = sharding.DataDriver(self.conf)
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else:
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storage_driver = storage_utils.load_storage_driver(self.conf)
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LOG.debug(_(u'Loading storage pipeline'))
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return pipeline.DataDriver(self.conf, storage_driver)
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@decorators.lazy_property(write=False)
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def cache(self):
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LOG.debug(_(u'Loading Proxy Cache Driver'))
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try:
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mgr = oslo_cache.get_cache(self.conf)
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return mgr
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except RuntimeError as exc:
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LOG.exception(exc)
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raise exceptions.InvalidDriver(exc)
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@decorators.lazy_property(write=False)
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def transport(self):
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transport_name = self.driver_conf.transport
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LOG.debug(_(u'Loading transport driver: %s'), transport_name)
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try:
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mgr = driver.DriverManager(self._transport_type,
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transport_name,
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invoke_on_load=True,
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invoke_args=[self.conf,
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self.storage,
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self.cache])
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return mgr.driver
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except RuntimeError as exc:
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LOG.exception(exc)
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raise exceptions.InvalidDriver(exc)
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def run(self):
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self.transport.listen()
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