aodh/aodh/api/app.py

86 lines
2.6 KiB
Python

#
# Copyright 2012 New Dream Network, LLC (DreamHost)
# Copyright 2015-2016 Red Hat, 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 os
import uuid
from oslo_config import cfg
from oslo_log import log
from paste import deploy
import pecan
from aodh.api import hooks
from aodh.api import middleware
from aodh.i18n import _LI
from aodh import service
from aodh import storage
LOG = log.getLogger(__name__)
# NOTE(sileht): pastedeploy uses ConfigParser to handle
# global_conf, since python 3 ConfigParser doesn't
# allow to store object as config value, only strings are
# permit, so to be able to pass an object created before paste load
# the app, we store them into a global var. But the each loaded app
# store it's configuration in unique key to be concurrency safe.
global APPCONFIGS
APPCONFIGS = {}
def setup_app(root, conf):
app_hooks = [hooks.ConfigHook(conf),
hooks.DBHook(
storage.get_connection_from_config(conf)),
hooks.TranslationHook()]
return pecan.make_app(
root,
hooks=app_hooks,
wrap_app=middleware.ParsableErrorMiddleware,
guess_content_type_from_ext=False
)
def load_app(conf, appname="aodh+keystone"):
global APPCONFIGS
# Build the WSGI app
cfg_path = conf.api.paste_config
if not os.path.isabs(cfg_path):
cfg_path = conf.find_file(cfg_path)
if cfg_path is None or not os.path.exists(cfg_path):
raise cfg.ConfigFilesNotFoundError([conf.api.paste_config])
config = dict(conf=conf)
configkey = str(uuid.uuid4())
APPCONFIGS[configkey] = config
LOG.info(_LI("WSGI config used: %s"), cfg_path)
return deploy.loadapp("config:" + cfg_path,
name=appname,
global_conf={'configkey': configkey})
def app_factory(global_config, **local_conf):
global APPCONFIGS
appconfig = APPCONFIGS.get(global_config.get('configkey'))
return setup_app(root=local_conf.get('root'), **appconfig)
def build_wsgi_app(argv=None):
return load_app(service.prepare_service(argv=argv))