* Preserve TTL in objectcache incr() method for APC, XCache and DBA.
Do not serialize numeric values, since it breaks the counters.
* Also gave some DBABagOStuff functions explicit visibility.
Change-Id: I13856832f418c843afc8e42a6d77686331f6cb41
With sharding, failover and consistent hashing. Only supports the
extension (phpredis), since the pure PHP library Predis had about a
billion files and it made my eyes hurt.
Change-Id: I90fb4a41d15265b9c22f8e32ecd1d956f89f3ce8
* Made getMulti() only return keys for items that exists.
* Made add() return false if the item already exist.
* Made replace() return false it the item does not already exist.
Change-Id: Idb9d9843ace0c81f71abfc22b90e30eb33d7579d
* Fixed the check for igbinary presence. It's not enough for the
extension to be loaded, the memcached extension also needs to be
compiled with --enable-memcached-igbinary.
* When delete() is attempted on a key that doesn't exist, return true,
as in the other BagOStuff implementations.
Change-Id: I298952f4a9925d860fa5673f632d073b1f20aa47
* Do queries in batches of 100 rows instead of all at once. Note that if there are a lot of objects with the exact same expiry time, it might take multiple runs of the script to delete them all.
* Progress meter.
* Fixed unintentional shortcut evaluation in MultiWriteBagOStuff::doWrite(). It would have caused writes to be skipped on the second cache if the first cache failed, now writes should be attempted on all caches.
* 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
