| # |
| # Copyright 2017 the original author or authors. |
| # |
| # 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. |
| # |
| |
| """ |
| Class to hold revisions, latest revision, etc., for a config node, used |
| for the active committed revisions or revisions part of a transaction. |
| """ |
| |
| from collections import OrderedDict |
| from weakref import WeakValueDictionary |
| |
| |
| class ConfigBranch(object): |
| |
| __slots__ = ( |
| '_node', # ref to node |
| '_txid', # txid for this branch (None for the committed branch) |
| '_origin', # _latest at time of branching on default branch |
| '_revs', # dict of rev-hash to ref of ConfigRevision |
| '_latest', # ref to latest committed ConfigRevision |
| '__weakref__' |
| ) |
| |
| def __init__(self, node, txid=None, origin=None, auto_prune=True): |
| self._node = node |
| self._txid = txid |
| self._origin = origin |
| self._revs = WeakValueDictionary() if auto_prune else OrderedDict() |
| self._latest = origin |
| |
| def __getitem__(self, hash): |
| return self._revs[hash] |
| |
| @property |
| def latest(self): |
| return self._latest |
| |
| @property |
| def origin(self): |
| return self._origin |