Docserver: Properly implement the Cron logic for ContentProvider and TemplateDataSource so that the…

chrome/common/extensions/docs/server2/future.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 sys
 
 _no_value = object()
 
 
+def Collect(futures):
+  '''Creates a Future which returns a list of results from each Future in
+  |future|.

[Yoyo Zhou, 2014/02/04 21:42:13]

futures

[not at google - send to devlin, 2014/02/04 21:57:13]

Done.

+  '''
+  return Future(delegate=Gettable(lambda: [f.Get() for f in futures]))
+
+
 class Gettable(object):
   '''Allows a Future to accept a callable as a delegate. Wraps |f| in a .Get
   interface required by Future.
   '''
   def __init__(self, f, *args):
     self._g = lambda: f(*args)
   def Get(self):
     return self._g()
 
 
@@ skipping 19 matching lines @@
     try:
       self._value = self._delegate.Get()
       return self._value
     except:
       self._exc_info = sys.exc_info()
       self._Raise()
 
   def _Raise(self):
     exc_info = self._exc_info
     raise exc_info[0], exc_info[1], exc_info[2]