Sushil Kumar
843bb0cd53
This patchset helps reducing the ignored pep8 errors. Fixed some ignored hacking rules, as listed follows: - E111 indentation is not a multiple of four - E122 continuation line missing indentation or outdented - E123 closing bracket does not match indentation of opening bracket's line - E128 continuation line under-indented for visual indent - E251 unexpected spaces around keyword / parameter equals - E265 block comment should start with '# ' - E713 test for membership should be 'not in' - H105 Don't use author tags - H306 imports not in alphabetical order Change-Id: Iadf2af4f6ec90420153ad63b5a41650392ef2cbd
116 lines
3.5 KiB
Python
116 lines
3.5 KiB
Python
# Copyright 2010-2011 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import optparse
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from trove.common import cfg
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from trove.common import utils
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CONF = cfg.CONF
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db_api_opt = CONF.db_api_implementation
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def get_db_api():
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return utils.import_module(db_api_opt)
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class Query(object):
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"""Mimics sqlalchemy query object.
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This class allows us to store query conditions and use them with
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bulk updates and deletes just like sqlalchemy query object.
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Using this class makes the models independent of sqlalchemy
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"""
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def __init__(self, model, query_func, **conditions):
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self._query_func = query_func
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self._model = model
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self._conditions = conditions
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self.db_api = get_db_api()
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def all(self):
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return self.db_api.list(self._query_func, self._model,
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**self._conditions)
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def count(self):
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return self.db_api.count(self._query_func, self._model,
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**self._conditions)
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def first(self):
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return self.db_api.first(self._query_func, self._model,
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**self._conditions)
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def join(self, *args):
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return self.db_api.join(self._query_func, self._model, *args)
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def __iter__(self):
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return iter(self.all())
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def update(self, **values):
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self.db_api.update_all(self._query_func, self._model, self._conditions,
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values)
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def delete(self):
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self.db_api.delete_all(self._query_func, self._model,
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**self._conditions)
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def limit(self, limit=200, marker=None, marker_column=None):
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return self.db_api.find_all_by_limit(
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self._query_func,
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self._model,
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self._conditions,
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limit=limit,
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marker=marker,
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marker_column=marker_column)
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def paginated_collection(self, limit=200, marker=None, marker_column=None):
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collection = self.limit(int(limit) + 1, marker, marker_column)
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if len(collection) > int(limit):
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return (collection[0:-1], collection[-2]['id'])
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return (collection, None)
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class Queryable(object):
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def __getattr__(self, item):
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return lambda model, **conditions: Query(
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model, query_func=getattr(get_db_api(), item), **conditions)
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db_query = Queryable()
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def add_options(parser):
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"""Adds any configuration options that the db layer might have.
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:param parser: An optparse.OptionParser object
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:retval None
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"""
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help_text = ("The following configuration options are specific to the "
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"Trove database.")
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group = optparse.OptionGroup(
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parser,
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"Registry Database Options",
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help_text)
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group.add_option(
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'--sql-connection',
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metavar="CONNECTION",
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default=None,
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help="A valid SQLAlchemy connection string for the "
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"registry database. Default: %(default)s.")
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parser.add_option_group(group)
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