89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
# Copyright (c) 2017 OpenStack Foundation
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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 oslo_log import log as logging
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import six
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import six.moves.urllib.parse as urlparse
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from stevedore import enabled
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from sahara import conductor as cond
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from sahara import exceptions as ex
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from sahara.i18n import _
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from sahara.i18n import _LI
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conductor = cond.API
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class DataSourceManager(object):
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def __init__(self):
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self.data_sources = {}
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self._load_data_sources()
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def _load_data_sources(self):
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config_ds = CONF.data_source_types
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extension_manager = enabled.EnabledExtensionManager(
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check_func=lambda ext: ext.name in config_ds,
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namespace='sahara.data_source.types',
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invoke_on_load=True
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)
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for ext in extension_manager.extensions:
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if ext.name in self.data_sources:
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raise ex.ConfigurationError(
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_("Data source with name '%s' already exists.") %
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ext.name)
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ext.obj.name = ext.name
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self.data_sources[ext.name] = ext.obj
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LOG.info(_LI("Data source name {ds_name} loaded {entry_point}")
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.format(ds_name=ext.name,
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entry_point=ext.entry_point_target))
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if len(self.data_sources) < len(config_ds):
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loaded_ds = set(six.iterkeys(self.data_sources))
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requested_ds = set(config_ds)
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raise ex.ConfigurationError(
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_("Data sources couldn't be loaded: %s") %
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", ".join(requested_ds - loaded_ds))
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def get_data_sources(self):
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config_ds = CONF.data_source_types
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return [self.get_data_source(name).name for name in config_ds]
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def get_data_source(self, name):
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res = self.data_sources.get(name)
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if res is None:
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raise ex.InvalidDataException(_("Invalid data source"))
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return res
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def get_data_source_by_url(self, url):
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url = urlparse.urlparse(url)
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if not url.scheme:
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raise ex.InvalidDataException(_("Data source url must have a"
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" scheme"))
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return self.get_data_source(url.scheme)
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DATA_SOURCES = None
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def setup_data_sources():
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global DATA_SOURCES
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DATA_SOURCES = DataSourceManager()
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