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<?php
/**
* Object caching using XCache.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Cache
*/
/**
* Wrapper for XCache object caching functions; identical interface
* to the APC wrapper
*
* @ingroup Cache
*/
class XCacheBagOStuff extends BagOStuff {
/**
* Get a value from the XCache object cache
*
* @param string $key cache key
* @param $casToken mixed: cas token
* @return mixed
*/
public function get( $key, &$casToken = null ) {
$val = xcache_get( $key );
if ( is_string( $val ) ) {
if ( $this->isInteger( $val ) ) {
$val = intval( $val );
} else {
$val = unserialize( $val );
}
} elseif ( is_null( $val ) ) {
return false;
}
return $val;
}
/**
* Store a value in the XCache object cache
*
* @param string $key cache key
* @param $value Mixed: object to store
* @param int $expire expiration time
* @return bool
*/
public function set( $key, $value, $expire = 0 ) {
if ( !$this->isInteger( $value ) ) {
$value = serialize( $value );
}
xcache_set( $key, $value, $expire );
return true;
}
/**
* @param $casToken mixed
* @param $key string
* @param $value mixed
* @param $exptime int
* @return bool
*/
public function cas( $casToken, $key, $value, $exptime = 0 ) {
// Can't find any documentation on xcache cas
throw new MWException( "CAS is not implemented in " . __CLASS__ );
}
/**
* Remove a value from the XCache object cache
*
* @param string $key cache key
* @param int $time not used in this implementation
* @return bool
*/
public function delete( $key, $time = 0 ) {
xcache_unset( $key );
return true;
}
/**
* Merge an item.
* XCache does not seem to support any way of performing CAS - this however will
* provide a way to perform CAS-like functionality.
*
* @param $key string
* @param $callback closure Callback method to be executed
* @param int $exptime Either an interval in seconds or a unix timestamp for expiry
* @param int $attempts The amount of times to attempt a merge in case of failure
* @return bool success
*/
public function merge( $key, closure $callback, $exptime = 0, $attempts = 10 ) {
return $this->mergeViaLock( $key, $callback, $exptime, $attempts );
}
public function incr( $key, $value = 1 ) {
return xcache_inc( $key, $value );
}
public function decr( $key, $value = 1 ) {
return xcache_dec( $key, $value );
}
}
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