90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
# Copyright 2015, Ericsson AB
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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 abc
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import six
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from oslo_config import cfg
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from oslo_db import api as db_api
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_BACKEND_MAPPING = {'sqlalchemy': 'gluon.db.sqlalchemy.api'}
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IMPL = db_api.DBAPI.from_config(cfg.CONF, backend_mapping=_BACKEND_MAPPING,
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lazy=True)
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def get_instance():
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"""Return a DB API instance."""
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return IMPL
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def get_models():
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return IMPL.models
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@six.add_metaclass(abc.ABCMeta)
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class Connection(object):
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@abc.abstractmethod
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def __init__(self):
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"""Constructor."""
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@abc.abstractmethod
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def create(self, model, values):
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"""Create a new gluon object from model.
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:param model: Class of the object which should be created
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:param values: A dict containing several items used to identify
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and track the port, and several dicts which are passed
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into the Drivers when managing this port. For example:
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::
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{
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'uuid': utils.generate_uuid(),
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'result': 'pass'
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}
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:returns: A port.
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"""
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@abc.abstractmethod
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def get_list(self, model, columns=None, filters=None, limit=None,
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marker=None, sort_key=None, sort_dir=None,
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failed=None, period=None):
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"""Get specific columns for matching model.
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Return a list of the specified columns for all tess that match the
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specified filters.
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:param model: Class of the object which should be listed
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:param columns: List of column names to return.
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Defaults to 'id' column when columns == None.
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:param filters: Filters to apply. Defaults to None.
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:param limit: Maximum number of tests to return.
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:param marker: the last item of the previous page; we return the next
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result set.
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:param sort_key: Attribute by which results should be sorted.
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:param sort_dir: direction in which results should be sorted.
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(asc, desc)
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:returns: A list of tuples of the specified columns.
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"""
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@abc.abstractmethod
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def get_by_uuid(self, model, uuid):
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"""Return an object of model.
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:param uuid: The uuid of a object.
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:returns: an object of model.
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"""
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