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# Copyright (C) 2010-2020 RhodeCode GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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"""
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SQLAlchemy Metadata and Session object
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"""
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from sqlalchemy.orm import declarative_base
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from sqlalchemy.orm import scoped_session, sessionmaker
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from sqlalchemy.orm import Session as SA_Session
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from rhodecode.lib.caching_query import ORMCache
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__all__ = [
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'Base', 'Session', 'SA_Session',
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'raw_query_executor',
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'bind_engine_to_session',
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'get_engine'
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]
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# scoped_session. Apply our custom CachingQuery class to it,
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# using a callable that will associate the dictionary
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# of regions with the Query.
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# to use cache use this in query
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# .options(FromCache("sqlalchemy_cache_type", "cachekey"))
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session_factory = sessionmaker(
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expire_on_commit=True,
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future=True
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)
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Session = scoped_session(session_factory)
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# The declarative Base
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Base = declarative_base()
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# pass empty regions, so we can fetch it on-demand inside ORMCache
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cache = ORMCache(regions={})
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cache.listen_on_session(Session)
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def raw_query_executor(engine=None):
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"""
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:param engine:
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:return:
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"""
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if not engine:
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engine = Session.bind
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session = SA_Session(engine)
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return session
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def get_engine():
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return Session.bind
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def bind_engine_to_session(engine):
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Session.remove()
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Session.configure(bind=engine)
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