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# Copyright 2022-2024 ETSI OSG/SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
Alberto Gonzalez Barneo
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#
# 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 logging, sqlalchemy, sqlalchemy_utils
from common.Settings import get_setting
LOGGER = logging.getLogger(__name__)
APP_NAME = 'tfs'
ECHO = False # true: dump SQL commands and transactions executed
CRDB_URI_TEMPLATE = 'cockroachdb://{:s}:{:s}@cockroachdb-public.{:s}.svc.cluster.local:{:s}/{:s}?sslmode={:s}'
class Engine:
@staticmethod
def get_engine() -> sqlalchemy.engine.Engine:
crdb_uri = get_setting('CRDB_URI', default=None)
if crdb_uri is None:
CRDB_NAMESPACE = get_setting('CRDB_NAMESPACE')
CRDB_SQL_PORT = get_setting('CRDB_SQL_PORT')
CRDB_DATABASE = get_setting('CRDB_DATABASE_APP')
CRDB_USERNAME = get_setting('CRDB_USERNAME')
CRDB_PASSWORD = get_setting('CRDB_PASSWORD')
CRDB_SSLMODE = get_setting('CRDB_SSLMODE')
crdb_uri = CRDB_URI_TEMPLATE.format(
CRDB_USERNAME, CRDB_PASSWORD, CRDB_NAMESPACE, CRDB_SQL_PORT, CRDB_DATABASE, CRDB_SSLMODE)
try:
engine = sqlalchemy.create_engine(
crdb_uri, connect_args={'application_name': APP_NAME}, echo=ECHO, future=True)
except: # pylint: disable=bare-except # pragma: no cover
LOGGER.exception('Failed to connect to database: {:s}'.format(str(crdb_uri)))
return None
return engine
@staticmethod
def create_database(engine : sqlalchemy.engine.Engine) -> None:
if not sqlalchemy_utils.database_exists(engine.url):
sqlalchemy_utils.create_database(engine.url)
@staticmethod
def drop_database(engine : sqlalchemy.engine.Engine) -> None:
if sqlalchemy_utils.database_exists(engine.url):
sqlalchemy_utils.drop_database(engine.url)