Docserver: Make the hand-written Cron methods run first rather than last, since

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

 # Copyright 2013 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 json
 
 from data_source import DataSource
 import features_utility
+from future import Gettable, Future
 from manifest_features import ConvertDottedKeysToNested
 from third_party.json_schema_compiler.json_parse import Parse
 
 def _ListifyAndSortDocs(features, app_name):
   '''Convert a |feautres| dictionary, and all 'children' dictionaries, into
   lists recursively. Sort lists first by 'level' then by name.
   '''
   def sort_key(item):
     '''Key function to sort items primarily by level (according to index into
     levels) then subsort by name.
@@ skipping 79 matching lines @@
 
 class ManifestDataSource(DataSource):
   '''Provides access to the properties in manifest features.
   '''
   def __init__(self, server_instance, _):
     self._features_bundle = server_instance.features_bundle
     self._object_store = server_instance.object_store_creator.Create(
         ManifestDataSource)
 
   def _CreateManifestData(self):
-    def for_templates(manifest_features, platform):
-      return _AddLevelAnnotations(
-          _ListifyAndSortDocs(
-              ConvertDottedKeysToNested(
-                  features_utility.Filtered(manifest_features, platform)),
-              app_name=platform.capitalize()))
-    manifest_features = self._features_bundle.GetManifestFeatures()
-    return {
-      'apps': for_templates(manifest_features, 'apps'),
-      'extensions': for_templates(manifest_features, 'extensions')
-    }
+    future_manifest_features = self._features_bundle.GetManifestFeatures()
+    def resolve():
+      manifest_features = future_manifest_features.Get()
+      def for_templates(manifest_features, platform):
+        return _AddLevelAnnotations(_ListifyAndSortDocs(
+            ConvertDottedKeysToNested(
+                features_utility.Filtered(manifest_features, platform)),
+            app_name=platform.capitalize()))
+      return {
+        'apps': for_templates(manifest_features, 'apps'),
+        'extensions': for_templates(manifest_features, 'extensions')
+      }
+    return Future(delegate=Gettable(resolve))
 
-  def _GetCachedManifestData(self, force_update=False):
+  def _GetCachedManifestData(self):
     data = self._object_store.Get('manifest_data').Get()
-    if data is None or force_update:
-      data = self._CreateManifestData()
+    if data is None:
+      data = self._CreateManifestData().Get()
       self._object_store.Set('manifest_data', data)
     return data
 
   def Cron(self):
-    self._GetCachedManifestData(force_update=True)
+    return self._CreateManifestData()
 
   def get(self, key):
     return self._GetCachedManifestData().get(key)