1 # Copyright 2013 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
5 from appengine_wrappers import db
6 from datastore_models import PersistentObjectStoreItem
7 from environment import IsDevServer
8 from future import All, Future
9 from object_store import ObjectStore
12 class PersistentObjectStore(ObjectStore):
13 '''Stores data persistently using the AppEngine Datastore API.
15 def __init__(self, namespace):
16 self._namespace = namespace
18 def SetMulti(self, mapping):
20 PersistentObjectStoreItem.CreateItem(self._namespace, key, value))
21 for key, value in mapping.iteritems()]
22 # If running the dev server, the futures don't complete until the server is
23 # *quitting*. This is annoying. Flush now.
25 [rpc.wait() for rpc in rpcs]
26 return All(Future(callback=lambda: rpc.get_result()) for rpc in rpcs)
28 def GetMulti(self, keys):
31 PersistentObjectStoreItem.CreateKey(self._namespace, k)))
34 return dict((key, future.get_result().GetValue())
35 for key, future in db_futures.iteritems()
36 if future.get_result() is not None)
37 return Future(callback=resolve)
39 def DelMulti(self, keys):
42 futures.append(db.delete_async(
43 PersistentObjectStoreItem.CreateKey(self._namespace, key)))
44 # If running the dev server, the futures don't complete until the server is
45 # *quitting*. This is annoying. Flush now.
47 [future.wait() for future in futures]