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Side by Side Diff: chrome/common/extensions/docs/server2/object_store.py

Issue 14218004: Devserver: only populate data during cron jobs, meaning all data from instances (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: PTAL Created 7 years, 8 months ago
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1 # Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be 2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file. 3 # found in the LICENSE file.
4 4
5 from appengine_wrappers import CACHE_TIMEOUT
6 from future import Future 5 from future import Future
7 6
8 class _SingleGetFuture(object): 7 class _SingleGetFuture(object):
9 def __init__(self, multi_get, key): 8 def __init__(self, multi_get, key):
10 self._future = multi_get 9 self._future = multi_get
11 self._key = key 10 self._key = key
12 11
13 def Get(self): 12 def Get(self):
14 return self._future.Get().get(self._key) 13 return self._future.Get().get(self._key)
15 14
16 class ObjectStore(object): 15 class ObjectStore(object):
17 """A class for caching picklable objects. 16 '''A class for caching picklable objects.
18 """ 17 '''
19 def Set(self, key, value, time=CACHE_TIMEOUT): 18 def Get(self, key):
20 """Sets key -> value in the object store, with the specified timeout. 19 '''Gets a |Future| with the value of |key| in the object store, or None
21 """ 20 if |key| is not in the object store.
22 self.SetMulti({ key: value }, time=time) 21 '''
22 return Future(delegate=_SingleGetFuture(self.GetMulti([key]), key))
23 23
24 def SetMulti(self, mapping, time=CACHE_TIMEOUT): 24 def GetMulti(self, keys):
25 """Sets the mapping of keys to values in the object store with the specified 25 '''Gets a |Future| with values mapped to |keys| from the object store, with
26 timeout. 26 any keys not in the object store omitted.
27 """ 27 '''
28 raise NotImplementedError() 28 raise NotImplementedError()
29 29
30 def Get(self, key, time=CACHE_TIMEOUT): 30 def Set(self, key, value):
31 """Gets a |Future| with the value of |key| in the object store, or None 31 '''Sets key -> value in the object store.
32 if |key| is not in the object store. 32 '''
33 """ 33 self.SetMulti({ key: value })
34 return Future(delegate=_SingleGetFuture(self.GetMulti([key], time=time),
35 key))
36 34
37 def GetMulti(self, keys, time=CACHE_TIMEOUT): 35 def SetMulti(self, items):
38 """Gets a |Future| with values mapped to |keys| from the object store, with 36 '''Atomically sets the mapping of keys to values in the object store.
39 any keys not in the object store mapped to None. 37 '''
40 """
41 raise NotImplementedError() 38 raise NotImplementedError()
42 39
43 def Delete(self, key): 40 def Del(self, key):
44 """Deletes a key from the object store. 41 '''Deletes a key from the object store.
45 """ 42 '''
43 self.DelMulti([key])
44
45 def DelMulti(self, keys):
46 '''Deletes |keys| from the object store.
47 '''
46 raise NotImplementedError() 48 raise NotImplementedError()
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