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# Copyright 2017 Huawei Technologies Co.,LTD.
# All Rights Reserved.
#
# 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.
"""Base classes for storage engines."""
import abc
from oslo_config import cfg
from oslo_db import api as db_api
import six
_BACKEND_MAPPING = {'sqlalchemy': 'cyborg.db.sqlalchemy.api'}
IMPL = db_api.DBAPI.from_config(cfg.CONF,
backend_mapping=_BACKEND_MAPPING,
lazy=True)
def get_instance():
"""Return a DB API instance."""
return IMPL
@six.add_metaclass(abc.ABCMeta)
class Connection(object):
"""Base class for storage system connections."""
@abc.abstractmethod
def __init__(self):
"""Constructor."""
# accelerator
@abc.abstractmethod
def accelerator_create(self, context, values):
"""Create a new accelerator."""
@abc.abstractmethod
def accelerator_get(self, context, uuid):
"""Get requested accelerator."""
@abc.abstractmethod
def accelerator_list(self, context, limit, marker, sort_key, sort_dir, project_only):
"""Get requested list accelerators."""
@abc.abstractmethod
def accelerator_update(self, context, uuid, values):
"""Update an accelerator."""
@abc.abstractmethod
def accelerator_destory(self, context, uuid):
"""Delete an accelerator."""
#ports
@abc.abstractmethod
def port_create(self, context, values):
"""Create a new port."""
@abc.abstractmethod
def port_get(self, context, uuid):
"""Get requested port."""
@abc.abstractmethod
def port_list(self, context, limit, marker, sort_key, sort_dir):
"""Get requested list ports."""
@abc.abstractmethod
def port_update(self, context, uuid, values):
"""Update a port."""
@abc.abstractmethod
def port_destory(self, context, uuid):
"""Delete a port."""
#deployable
@abc.abstractmethod
def deployable_create(self, context, values):
"""Create a new deployable."""
@abc.abstractmethod
def deployable_get(self, context, uuid):
"""Get requested deployable."""
@abc.abstractmethod
def deployable_get_by_host(self, context, host):
"""Get requested deployable by host."""
@abc.abstractmethod
def deployable_list(self, context):
"""Get requested list of deployables."""
@abc.abstractmethod
def deployable_update(self, context, uuid, values):
"""Update a deployable."""
@abc.abstractmethod
def deployable_delete(self, context, uuid):
"""Delete a deployable."""
@abc.abstractmethod
def deployable_get_by_filters(self, context,
filters, sort_key='created_at',
sort_dir='desc', limit=None,
marker=None, columns_to_join=None):
"""Get requested deployable by filter."""
#attribute table
@abc.abstractmethod
def attribute_create(self, context, key, value):
"""Create a new attribute."""
@abc.abstractmethod
def attribute_get(self, context, uuid):
"""Get requested attribute."""
@abc.abstractmethod
def attribute_update(self, context, uuid, key, value):
"""Update an attribute's key value pair."""
@abc.abstractmethod
def attribute_delete(self, context, uuid):
"""Delete an attribute."""
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