30a64c67c1
- Add PEP8 section to tox.ini - Add hacking to requirements to enforce OpenStack style requirements - Fix formatting issues flagged by flake8 check - Add copyright notices to all remaining files - Update .gitignore file Change-Id: I6f6f97ca1291000acee7e925826bf853b2cc8744
106 lines
3.3 KiB
Python
106 lines
3.3 KiB
Python
# Copyright (c) 2014 Dark Secret Software 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 ConfigParser
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import traceback
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import falcon
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import simport
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import v1_api
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import v2_api
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class NotImplemented(Exception):
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pass
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def _load_implementations(impl_map, versions, config, scratchpad):
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for version in versions:
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target = config.get('global', 'v%d_impl' % version)
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klass = simport.load(target)
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impl_map[version] = klass(config, scratchpad)
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def _initialize(enabled_versions, implementation_map):
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# The de facto set of supported versions.
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versions = {1: v1_api.Schema,
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2: v2_api.Schema}
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api = falcon.API()
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routes = []
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for version in enabled_versions:
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klass = versions[version]
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impl = implementation_map.get(version)
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if not impl:
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raise NotImplemented("No implementation available for Quincy"
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" version %d" % version)
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print("Version %d using %s" % (version, impl))
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routes.append(klass(version, api, impl))
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# TODO(sandy): We need to create the top-level /v1, ... /vN
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# resources here too.
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return api
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def _get_api(config_location=None):
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print("Using config_location=%s (None means default impl)"
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% config_location)
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# The default implementation is internal and works with
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# a fake/static set of data.
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local_config = ConfigParser.ConfigParser()
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local_config.add_section('global')
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local_config.set('global', 'v1_impl', 'quincy.v1_impl:Impl')
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local_config.set('global', 'v2_impl', 'quincy.v2_impl:Impl')
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# There may have been prior versions
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# but they could be deprecated and dropped.
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# Only the versions specified here define
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# the currently supported StackTach.v3 API.
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enabled_versions = [1] # [1, 2]
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if config_location:
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config = ConfigParser.ConfigParser()
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config.read(config_location)
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enabled_versions = [int(x) for x in
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config.get('global',
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'enabled_versions').split(',')]
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# Rather than every implementation duplicate resources, the
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# scratchpad is a shared storage area all the implementations
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# can use to share things (like pipeline drivers, etc).
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scratchpad = {}
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impl_map = {}
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_load_implementations(impl_map, enabled_versions, local_config,
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scratchpad)
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if config_location:
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# Overlay the impl_map with the implementations
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# specified in the config file.
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_load_implementations(impl_map, enabled_versions, config,
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scratchpad)
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return _initialize(enabled_versions, impl_map)
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def get_api(config_location=None):
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try:
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return _get_api(config_location)
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except Exception:
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print("Error getting API:", traceback.format_exc())
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return None
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