130 lines
4.6 KiB
Python
130 lines
4.6 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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import socket
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from oslo_log import log
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from osprofiler import opts as profiler_opts
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from osprofiler import profiler
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from stevedore import driver
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from zaqar.api import handler
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from zaqar.common import cache as oslo_cache
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from zaqar.common import consts
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from zaqar.common import decorators
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from zaqar.common import errors
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from zaqar.conf import drivers as driver_opts
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from zaqar.conf import opts as opts_tool
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from zaqar.storage import pipeline
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from zaqar.storage import pooling
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from zaqar.storage import utils as storage_utils
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from zaqar.transport import base
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from zaqar.transport.middleware import profile
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from zaqar.transport import validation
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LOG = log.getLogger(__name__)
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class Bootstrap(object):
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"""Defines the Zaqar 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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for group, opts in opts_tool.list_opts_by_group():
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self.conf.register_opts(opts, group=group)
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profiler_opts.set_defaults(self.conf)
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# TODO(wangxiyuan): Now the OSprofiler feature in Zaqar only support
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# wsgi. Websocket part will be added in the future.
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profile.setup(self.conf, 'Zaqar-server', socket.gethostname())
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self.driver_conf = self.conf[driver_opts.GROUP_NAME]
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@decorators.lazy_property(write=False)
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def api(self):
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LOG.debug(u'Loading API handler')
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validate = validation.Validator(self.conf)
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defaults = base.ResourceDefaults(self.conf)
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return handler.Handler(self.storage, self.control, validate, defaults)
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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.pooling:
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LOG.debug(u'Storage pooling enabled')
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storage_driver = pooling.DataDriver(self.conf, self.cache,
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self.control)
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if self.conf.profiler.enabled:
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storage_driver = profiler.trace_cls("pooling_data_"
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"driver")(storage_driver)
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else:
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storage_driver = storage_utils.load_storage_driver(
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self.conf, self.cache, control_driver=self.control)
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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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self.control)
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@decorators.lazy_property(write=False)
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def control(self):
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LOG.debug(u'Loading storage control driver')
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return storage_utils.load_storage_driver(self.conf, self.cache,
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control_mode=True)
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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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oslo_cache.register_config(self.conf)
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return oslo_cache.get_cache(self.conf)
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except RuntimeError as exc:
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LOG.exception('Error loading proxy cache.')
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raise errors.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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if transport_name == consts.TRANSPORT_WEBSOCKET:
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args = [self.conf, self.api, self.cache]
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else:
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args = [
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self.conf,
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self.storage,
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self.cache,
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self.control,
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]
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try:
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mgr = driver.DriverManager('zaqar.transport',
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transport_name,
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invoke_on_load=True,
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invoke_args=args)
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return mgr.driver
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except RuntimeError as exc:
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LOG.exception(u'Failed to load transport driver zaqar.transport.'
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u'%(driver)s with args %(args)s',
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{'driver': transport_name, 'args': args})
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raise errors.InvalidDriver(exc)
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def run(self):
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self.transport.listen()
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