Docserver: Persist stat cache for versioned file systems

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

Index: chrome/common/extensions/docs/server2/refresh_servlet.py
diff --git a/chrome/common/extensions/docs/server2/refresh_servlet.py b/chrome/common/extensions/docs/server2/refresh_servlet.py
index eb8c0642a7a67ccf66f876cd8f9d379da6115f47..87c6e06ac4d5aed792dcaef95eb08acd2c474b1c 100644
--- a/chrome/common/extensions/docs/server2/refresh_servlet.py
+++ b/chrome/common/extensions/docs/server2/refresh_servlet.py
@@ -26,6 +26,21 @@ from timer import Timer, TimerClosure
 _log = CustomLogger('refresh')
 
 
+
+class _InstanceMasterCommitUpdater(object):
+  def __init__(self, commit):
+    self._commit = commit
+
+  def Refresh(self, path):
+    if self._commit is None:
+      raise ValueError('Refusing to set instance master without a commit ID')
+    creator = ObjectStoreCreator(start_empty=False)
+    store = creator.Create(str, category='commits')

[not at google - send to devlin, 2014/10/20 21:06:58]

Ok - I see why you use str. Maybe you should pull this "master commit thing"
into its own class (or at least own file) which does its own caching.

[Ken Rockot(use gerrit already), 2014/10/22 03:19:54]

Done.

+    store.SetMulti({ 'master': self._commit })
+    return Future(callback=lambda: None)
+
+
+
 class RefreshServlet(Servlet):
   '''Servlet which refreshes a single data source.
   '''
@@ -92,6 +107,8 @@ class RefreshServlet(Servlet):
         data_source = server_instance.platform_bundle
       elif source_name == 'content_providers':
         data_source = server_instance.content_providers
+      elif source_name == 'instance_master':
+        data_source = _InstanceMasterCommitUpdater(commit)
       else:
         data_source = CreateDataSource(source_name, server_instance)