ZendServer.php

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<?php
#require_once 'Zend/Cache/Backend/Interface.php';

#require_once 'Zend/Cache/Backend.php';


abstract class Zend_Cache_Backend_ZendServer extends Zend_Cache_Backend implements Zend_Cache_Backend_Interface
{
    protected $_options = array(
        'namespace' => 'zendframework'
    );

    abstract protected function _store($data, $id, $timeToLive);

    abstract protected function _fetch($id);

    abstract protected function _unset($id);

    abstract protected function _clear();

    public function load($id, $doNotTestCacheValidity = false)
    {
        $tmp = $this->_fetch($id);
        if ($tmp !== null) {
            return $tmp;
        }
        return false;
    }

    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;
    }

    private function _expireTime($lifetime)
    {
        if ($lifetime === null) {
            return 9999999999;
        }
        return time() + $lifetime;
    }

    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);
    }

    public function remove($id)
    {
        $result1 = $this->_unset($id);
        $result2 = $this->_unset('internal-metadatas---' . $id);

        return $result1 && $result2;
    }

    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;
        }
    }
}