From: Aaron Schulz <aschulz@wikimedia.org>
Date: Thu, 13 Aug 2015 22:54:44 +0000 (-0700)
Subject: Added a tombstone comment to WANObjectCache
X-Git-Tag: 1.31.0-rc.0~10353^2
X-Git-Url: https://git.cyclocoop.org/%7B%24www_url%7Dadmin/compta/exercices/bilan.php?a=commitdiff_plain;h=72c493a3e42fbb88c35bd34380bf778c7bb5f404;p=lhc%2Fweb%2Fwiklou.git

Added a tombstone comment to WANObjectCache

Change-Id: Ia8c2fc4d4bbb741a6cd7aaa6f3ae433e65743b29
---

diff --git a/includes/libs/objectcache/WANObjectCache.php b/includes/libs/objectcache/WANObjectCache.php
index e8837b330b..2d54681465 100644
--- a/includes/libs/objectcache/WANObjectCache.php
+++ b/includes/libs/objectcache/WANObjectCache.php
@@ -258,7 +258,9 @@ class WANObjectCache {
 	 *
 	 * This instantiates a hold-off period where the key cannot be
 	 * written to avoid race conditions where dependent keys get updated
-	 * with a stale value (e.g. from a DB slave).
+	 * with a stale value (e.g. from a DB slave). This is implemented by
+	 * storing a special "tombstone" value at the cache key that this
+	 * class recognizes; get() calls will return false for the key.
 	 *
 	 * This should only be called when the underlying data (being cached)
 	 * changes in a significant way. If called twice on the same key, then