8dee8df12b
Previously, an exception was not caught in one of invocations (create_network) of _ensure_default_security_group. Move exception handling inside that method so it never fails with such exception. Change-Id: Ibb0597d4db187c856f9ac1d9700701e0165c3c73 Closes-Bug: #1419723
60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
# Copyright 2011 VMware, Inc.
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# All Rights Reserved.
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#
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# 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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import contextlib
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from oslo_config import cfg
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from oslo_db.sqlalchemy import session
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from sqlalchemy import exc
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_FACADE = None
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MAX_RETRIES = 10
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def _create_facade_lazily():
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global _FACADE
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if _FACADE is None:
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_FACADE = session.EngineFacade.from_config(cfg.CONF, sqlite_fk=True)
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return _FACADE
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def get_engine():
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"""Helper method to grab engine."""
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facade = _create_facade_lazily()
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return facade.get_engine()
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def get_session(autocommit=True, expire_on_commit=False):
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"""Helper method to grab session."""
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facade = _create_facade_lazily()
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return facade.get_session(autocommit=autocommit,
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expire_on_commit=expire_on_commit)
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@contextlib.contextmanager
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def autonested_transaction(sess):
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"""This is a convenience method to not bother with 'nested' parameter."""
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try:
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session_context = sess.begin_nested()
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except exc.InvalidRequestError:
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session_context = sess.begin(subtransactions=True)
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finally:
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with session_context as tx:
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yield tx
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