* Introduced a common base class for the two memcached clients, called
MemcachedBagOStuff.
* Moved the expiry time normalisation from MemcachedClient.php to
MemcachedBagOStuff since libmemcached needs the same workaround.
Change-Id: I507d4ec5a7fd863ae64a94f2c453981f9f03746c
When enabling memcached debug logs ($wgMemCachedDebug), they are
unconditionally sent to the main $wgDebugLogFile. This patch make it
possible to sent thoses specific log to an alternate file by setting
$wgDebugLogGroups['memcached']
Change-Id: I85d8ab92471ce3c31f8168dae83fe91e95e18dce
This reverts the SpecialCachedPage and formatDuration sagas, with some collateral damage here and there. All of these revisions are tagged with 'gerritmigration' and will be resubmitted into Gerrit after the Gerrit switchover. See also http://lists.wikimedia.org/pipermail/wikitech-l/2012-March/059124.html
PHP fatal error in /usr/local/apache/common-local/php-1.18/includes/objectcache/MemcachedPhpBagOStuff.php line 91:
Call to undefined method MemCachedClientforWiki::lock()
* Moved the global functions to GlobalFunctions.php, where they are now just convenience wrappers. Made them return non-references. Updated callers (none found in extensions).
* Added an advanced configuration method, $wgObjectCaches, which allows a lot more detail in the object cache configuration than $wgMainCacheType.
* Made all object cache classes derive from BagOStuff.
* Split the MWMemcached class into a generic client class and a MediaWiki-specific wrapper class. The wrapper class presents a simple BagOStuff interface to calling code, hiding memcached client internals, and will simplify the task of supporting the PECL extension.
* Added some extra constructor parameters to MWMemcached, configurable via $wgObjectCaches.
* Removed the *_multi() methods from BagOStuff, my grepping indicates that they are not used.
* Rewrote FakeMemCachedClient as a BagOStuff subclass, called EmptyBagOStuff.
* Added an optional "server" parameter to SQLBagOStuff. This allows the server holding the objectcache table to be different from the server holding the core DB.
* Added MultiWriteBagOStuff: a cache class which writes to multiple locations, and reads from them in a defined fallback sequence. This can be used to extend the cache space by adding disk-backed storage to existing in-memory caches.
* Made MWMemcached::get() return false on failure instead of null, to match the BagOStuff documentation and the other BagOStuff subclasses. Anything that was relying on it returning null would have already been broken with SqlBagOStuff.
* Fixed a bug in the memcached client causing keys with spaces or line breaks in them to break the memcached protocol, injecting arbitrary commands or parameters. Since the PECL client apparently also has this flaw, I implemented the fix in the wrapper class.
* Renamed BagOStuff::set_debug() to setDebug(), since we aren't emulating the memcached client anymore
* Fixed spelling error in MWMemcached: persistant -> persistent
