Devserver: have a separate ObjectStore namespace (both memcache and datastore)

chrome/common/extensions/docs/server2/caching_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.
 
 from file_system import FileSystem, StatInfo, FileNotFoundError
 from future import Future
 
 class _AsyncUncachedFuture(object):
   def __init__(self,
                uncached,
@@ skipping 15 matching lines @@
     self._object_store.SetMulti(mapping)
     return self._current_result
 
 class CachingFileSystem(FileSystem):
   """FileSystem implementation which caches its results in an object store.
   """
   def __init__(self, file_system, object_store_creator_factory):
     self._file_system = file_system
     def create_object_store(category):
       return (object_store_creator_factory.Create(CachingFileSystem)
-          .Create(category='%s/%s' % (file_system.GetName(), category),
-                  version=file_system.GetVersion()))
+          .Create(category='%s/%s' % (file_system.GetName(), category)))
     self._stat_object_store = create_object_store('stat')
     self._read_object_store = create_object_store('read')
     self._read_binary_object_store = create_object_store('read-binary')
 
   def Stat(self, path, stats=None):
     """Stats the directory given, or if a file is given, stats the file's parent
     directory to get info about the file.
     """
     # TODO(kalman): store the whole stat info, not just the version.
     version = self._stat_object_store.Get(path).Get()
@@ skipping 48 matching lines @@
       result[path] = data
 
     if not uncached:
       return Future(value=result)
 
     return Future(delegate=_AsyncUncachedFuture(
         self._file_system.Read(uncached, binary=binary),
         result,
         self,
         read_object_store))