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# Copyright 2011 OpenStack Foundation
# 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.
import contextlib
from oslo_db.sqlalchemy import enginefacade
from oslo_log import log as logging
from sqlalchemy import MetaData
from trove.common import cfg
from trove.common.i18n import _
from trove.db.sqlalchemy import mappers
_FACADE = None
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
def configure_db(models_mapper=None):
facade = _create_facade()
if models_mapper:
models_mapper.map(facade)
else:
from trove.backup import models as backup_models
from trove.cluster import models as cluster_models
from trove.conductor import models as conductor_models
from trove.configuration import models as configurations_models
from trove.datastore import models as datastores_models
from trove.dns import models as dns_models
from trove.extensions.common import models as common_models
from trove.extensions.security_group import models as secgrp_models
from trove.guestagent import models as agent_models
from trove.instance import models as base_models
from trove.module import models as module_models
from trove.quota import models as quota_models
model_modules = [
base_models,
datastores_models,
dns_models,
common_models,
agent_models,
quota_models,
backup_models,
secgrp_models,
configurations_models,
conductor_models,
cluster_models,
module_models
]
models = {}
for module in model_modules:
models.update(module.persisted_models())
mappers.map(get_engine(), models)
def _create_facade():
global _FACADE
if _FACADE is None:
ctx = enginefacade.transaction_context()
_FACADE = ctx.writer
return _FACADE
def _check_facade():
if _FACADE is None:
LOG.exception("***The Database has not been setup!!!***")
raise RuntimeError(
_("***The Database has not been setup!!!***"))
def get_facade():
_check_facade()
return _FACADE
def get_engine():
_create_facade()
return _FACADE.get_engine()
def get_session(**kwargs):
facade = _create_facade()
sessionmaker = facade.get_sessionmaker()
return sessionmaker(**kwargs)
def raw_query(model, **kwargs):
return get_session(**kwargs).query(model)
def clean_db():
engine = get_engine()
meta = MetaData()
meta.bind = engine
meta.reflect(bind=engine)
with contextlib.closing(engine.connect()) as con:
trans = con.begin()
for table in reversed(meta.sorted_tables):
if table.name != "migrate_version":
con.execute(table.delete())
trans.commit()
def drop_db():
_create_facade()
engine = get_engine()
meta = MetaData()
meta.bind = engine
meta.reflect()
meta.drop_all()
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