Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(829)

Unified Diff: chrome/common/extensions/docs/server2/caching_file_system.py

Issue 14856006: Docserver: achieve online vs offline (cron vs instance) behaviour at the object (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: . Created 7 years, 8 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
Index: chrome/common/extensions/docs/server2/caching_file_system.py
diff --git a/chrome/common/extensions/docs/server2/caching_file_system.py b/chrome/common/extensions/docs/server2/caching_file_system.py
index aa5e93ad3af321142bcb2d2dee341d47adfed103..758514a43520453bbaf5c94011d4a7d4fa2d5d10 100644
--- a/chrome/common/extensions/docs/server2/caching_file_system.py
+++ b/chrome/common/extensions/docs/server2/caching_file_system.py
@@ -5,6 +5,8 @@
from file_system import FileSystem, StatInfo, FileNotFoundError
from future import Future
+from object_store_creator import ObjectStoreCreator
+
class _AsyncUncachedFuture(object):
def __init__(self,
uncached_read_futures,
@@ -32,28 +34,24 @@ class CachingFileSystem(FileSystem):
'''FileSystem which implements a caching layer on top of |file_system|. It's
smart, using Stat() to decided whether to skip Read()ing from |file_system|,
and only Stat()ing directories never files.
-
- Specify |use_existing_values| to continue using whatever has been cached in
- the object stores. By default, the data in the stores is assumed to be stale
- (althought consistent). Using existing values is useful for live instances
- that don't want to touch the file system; not using them is good for the
- cron jobs, where we want to refresh the data.
'''
- def __init__(self,
- file_system,
- object_store_creator_factory,
- use_existing_values=False):
+ def __init__(self, file_system, object_store_creator_factory):
self._file_system = file_system
- def create_object_store(category):
+ def create_object_store(category, start_configuration=None):
return (object_store_creator_factory.Create(CachingFileSystem)
.Create(category='%s/%s' % (file_system.GetName(), category),
- # By Stat()ing from scratch we'll end up not using the
- # existing values, but also not doing unnecessary Read()s if
- # the files haven't changed from last time.
- start_empty=(not use_existing_values and category == 'stat')))
+ start_configuration=start_configuration))
+ # Use the existing start configuation.
self._stat_object_store = create_object_store('stat')
- self._read_object_store = create_object_store('read')
- self._read_binary_object_store = create_object_store('read-binary')
+ # Force START_POPULATED for the read stores since if Stat is empty we're
+ # effectively starting empty - but won't be doing unnecessary Read()s if
+ # the files haven't changed from last time.
+ self._read_object_store = create_object_store(
+ 'read',
+ start_configuration=ObjectStoreCreator.START_POPULATED)
+ self._read_binary_object_store = create_object_store(
+ 'read-binary',
+ start_configuration=ObjectStoreCreator.START_POPULATED)
def Stat(self, path):
'''Stats the directory given, or if a file is given, stats the file's parent

Powered by Google App Engine
This is Rietveld 408576698