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doctrine2/lib/Doctrine/Cache/Apc.php

109 lines
3.5 KiB
PHP

<?php
/*
* $Id$
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.org>.
*/
/**
* Doctrine_Cache_Apc
*
* @package Doctrine
* @subpackage Cache
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.com
* @since 1.0
* @version $Revision$
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Cache_Apc extends Doctrine_Cache_Driver
{
/**
* constructor
*
* @param array $options associative array of cache driver options
*/
public function __construct($options = array())
{
if ( ! extension_loaded('apc')) {
throw new Doctrine_Cache_Exception('The apc extension must be loaded for using this backend !');
}
parent::__construct($options);
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* Note : return value is always "string" (unserialization is done by the core not by the backend)
*
* @param string $id cache id
* @param boolean $testCacheValidity if set to false, the cache validity won't be tested
* @return string cached datas (or false)
*/
public function fetch($id, $testCacheValidity = true)
{
$tmp = apc_fetch($id);
if (is_array($tmp)) {
return $tmp[0];
}
return false;
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id cache id
* @return mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function contains($id)
{
$tmp = apc_fetch($id);
if (is_array($tmp)) {
return $tmp[1];
}
return false;
}
/**
* Save some string datas into a cache record
*
* Note : $data is always saved as a string
*
* @param string $data data to cache
* @param string $id cache id
* @param int $lifeTime if != false, set a specific lifetime for this cache record (null => infinite lifeTime)
* @return boolean true if no problem
*/
public function save($id, $data, $lifeTime = false)
{
$lifeTime = $this->getLifeTime($lifeTime);
return (bool) apc_store($id, array($data, time()), $lifeTime);
}
/**
* Remove a cache record
*
* @param string $id cache id
* @return boolean true if no problem
*/
public function delete($id)
{
return apc_delete($id);
}
}