Docserver: Persist stat cache for versioned file systems

chrome/common/extensions/docs/server2/subversion_file_system.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import posixpath
 import traceback
 import xml.dom.minidom as xml
 from xml.parsers.expat import ExpatError
 
 from appengine_url_fetcher import AppEngineUrlFetcher
@@ skipping 183 matching lines @@
         raise FileSystemError('Failed to find version of dir %s' % directory)
       if path == '' or path.endswith('/'):
         return stat_info
       if filename not in stat_info.child_versions:
         raise FileNotFoundError(
             '%s from %s was not in child versions for Stat' % (filename, path))
       return StatInfo(stat_info.child_versions[filename])
 
     return Future(callback=resolve)
 
-  def GetIdentity(self):
+  def GetStableIdentity(self):
     # NOTE: no revision here, since it would mess up the caching of reads. It
     # probably doesn't matter since all the caching classes will use the result
     # of Stat to decide whether to re-read - and Stat has a ceiling of the
     # revision - so when the revision changes, so might Stat. That is enough.
     return '@'.join((self.__class__.__name__, StringIdentity(self._svn_path)))