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<?php
/**
* Per-process memory cache for storing items.
*
* 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
*/
/**
* Class for process caching individual properties of expiring items
*
* When the key for an entire item is deleted, all properties for it are deleted
*
* @ingroup Cache
* @deprecated Since 1.32 Use MapCacheLRU instead
*/
class ProcessCacheLRU {
/** @var MapCacheLRU */
protected $cache;
/**
* @param int $maxKeys Maximum number of entries allowed (min 1).
* @throws UnexpectedValueException When $maxCacheKeys is not an int or =< 0.
*/
public function __construct( $maxKeys ) {
$this->cache = new MapCacheLRU( $maxKeys );
}
/**
* Set a property field for a cache entry.
* This will prune the cache if it gets too large based on LRU.
* If the item is already set, it will be pushed to the top of the cache.
*
* @param string $key
* @param string $prop
* @param mixed $value
* @return void
*/
public function set( $key, $prop, $value ) {
$this->cache->setField( $key, $prop, $value );
}
/**
* Check if a property field exists for a cache entry.
*
* @param string $key
* @param string $prop
* @param float $maxAge Ignore items older than this many seconds (since 1.21)
* @return bool
*/
public function has( $key, $prop, $maxAge = 0.0 ) {
return $this->cache->hasField( $key, $prop, $maxAge );
}
/**
* Get a property field for a cache entry.
* This returns null if the property is not set.
* If the item is already set, it will be pushed to the top of the cache.
*
* @param string $key
* @param string $prop
* @return mixed
*/
public function get( $key, $prop ) {
return $this->cache->getField( $key, $prop );
}
/**
* Clear one or several cache entries, or all cache entries.
*
* @param string|array|null $keys
* @return void
*/
public function clear( $keys = null ) {
$this->cache->clear( $keys );
}
/**
* Resize the maximum number of cache entries, removing older entries as needed
*
* @param int $maxKeys
* @return void
* @throws UnexpectedValueException
*/
public function resize( $maxKeys ) {
$this->cache->setMaxSize( $maxKeys );
}
/**
* Get cache size
* @return int
*/
public function getSize() {
return $this->cache->getMaxSize();
}
}
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