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OpenStack Study: session.py**** CubicPower OpenStack Study **** def _create_facade_lazily(): global _FACADE if _FACADE is None: _FACADE = db_session.EngineFacade(CONF.baremetal.sql_connection, **dict(CONF.database.iteritems())) return _FACADE
**** CubicPower OpenStack Study **** def get_session(autocommit=True, expire_on_commit=False): """Return a SQLAlchemy session.""" facade = _create_facade_lazily() return facade.get_session(autocommit=autocommit, expire_on_commit=expire_on_commit)
**** CubicPower OpenStack Study **** def get_engine(): """Return a SQLAlchemy engine.""" facade = _create_facade_lazily() return facade.get_engine()
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