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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/
/** @see Zend_Cache_Backend_Interface */
/** @see Zend_Cache_Backend */
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Cache_Backend_ZendServer extends Zend_Cache_Backend implements Zend_Cache_Backend_Interface
{
/**
* Available options
*
* =====> (string) namespace :
* Namespace to be used for chaching operations
*
* @var array available options
*/
protected $_options = array(
'namespace' => 'zendframework'
);
/**
* Store data
*
* @param mixed $data Object to store
* @param string $id Cache id
* @param int $timeToLive Time to live in seconds
* @throws Zend_Cache_Exception
*/
abstract protected function _store($data, $id, $timeToLive);
/**
* Fetch data
*
* @param string $id Cache id
* @throws Zend_Cache_Exception
*/
abstract protected function _fetch($id);
/**
* Unset data
*
* @param string $id Cache id
*/
abstract protected function _unset($id);
/**
* Clear cache
*/
abstract protected function _clear();
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* @param string $id cache id
* @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
* @return string cached datas (or false)
*/
public function load($id, $doNotTestCacheValidity = false)
{
$tmp = $this->_fetch($id);
if ($tmp !== null) {
return $tmp;
}
return false;
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id cache id
* @return mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
* @throws Zend_Cache_Exception
*/
public function test($id)
{
$tmp = $this->_fetch('internal-metadatas---' . $id);
if ($tmp !== false) {
if (!is_array($tmp) || !isset($tmp['mtime'])) {
Zend_Cache::throwException('Cache metadata for \'' . $id . '\' id is corrupted' );
}
return $tmp['mtime'];
}
return false;
}
/**
* Compute & return the expire time
*
* @return int expire time (unix timestamp)
*/
private function _expireTime($lifetime)
{
if ($lifetime === null) {
return 9999999999;
}
return time() + $lifetime;
}
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data datas to cache
* @param string $id cache id
* @param array $tags array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime if != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @return boolean true if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false)
{
$lifetime = $this->getLifetime($specificLifetime);
$metadatas = array(
'mtime' => time(),
'expire' => $this->_expireTime($lifetime),
);
if (count($tags) > 0) {
$this->_log('Zend_Cache_Backend_ZendServer::save() : tags are unsupported by the ZendServer backends');
}
return $this->_store($data, $id, $lifetime) &&
$this->_store($metadatas, 'internal-metadatas---' . $id, $lifetime);
}
/**
* Remove a cache record
*
* @param string $id cache id
* @return boolean true if no problem
*/
public function remove($id)
{
$result1 = $this->_unset($id);
$result2 = $this->_unset('internal-metadatas---' . $id);
return $result1 && $result2;
}
/**
* Clean some cache records
*
* Available modes are :
* 'all' (default) => remove all cache entries ($tags is not used)
* 'old' => unsupported
* 'matchingTag' => unsupported
* 'notMatchingTag' => unsupported
* 'matchingAnyTag' => unsupported
*
* @param string $mode clean mode
* @param array $tags array of tags
* @throws Zend_Cache_Exception
* @return boolean true if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
switch ($mode) {
case Zend_Cache::CLEANING_MODE_ALL:
$this->_clear();
return true;
break;
case Zend_Cache::CLEANING_MODE_OLD:
$this->_log("Zend_Cache_Backend_ZendServer::clean() : CLEANING_MODE_OLD is unsupported by the Zend Server backends.");
break;
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
$this->_clear();
$this->_log('Zend_Cache_Backend_ZendServer::clean() : tags are unsupported by the Zend Server backends.');
break;
default:
Zend_Cache::throwException('Invalid mode for clean() method');
break;
}
}
}
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