42 lines
1.6 KiB
Python
42 lines
1.6 KiB
Python
# 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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from oslo_log import log as logging
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker, scoped_session
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from tatu import config
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from tatu.db.models import Base
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LOG = logging.getLogger(__name__)
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class SQLAlchemySessionManager(object):
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def __init__(self):
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LOG.info('Creating sqlalchemy engine {}'.format(config.CONF.tatu.sqlalchemy_engine))
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self.engine = create_engine(config.CONF.tatu.sqlalchemy_engine)
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self.engine.execute("CREATE DATABASE IF NOT EXISTS tatu;")
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self.engine.execute("USE tatu;")
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Base.metadata.create_all(self.engine)
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self.Session = scoped_session(sessionmaker(self.engine))
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def process_resource(self, req, resp, resource, params):
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# Create a scoped session for every request
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resource.session = self.Session()
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def process_response(self, req, resp, resource, req_succeeded):
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if hasattr(resource, 'session'):
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if not req_succeeded:
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resource.session.rollback()
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# Close the scoped session when the request ends
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self.Session.remove()
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