Redis for TinyBrick Lightspeed - cache server model

cache-server-model

<?php
class TinyBrick_LightSpeed_Model_Server_Redis {
	protected $_server;
	protected $_enabled 		= false;
	
	public function getServer() {
		if (!$this->_server) {
			require_once($_SERVER['DOCUMENT_ROOT'] . '/lib/Credis/Client.php');
			require_once($_SERVER['DOCUMENT_ROOT'] . '/lib/Zend/Cache/Backend.php');
			require_once($_SERVER['DOCUMENT_ROOT'] . '/lib/Zend/Cache/Backend/Interface.php');
			require_once($_SERVER['DOCUMENT_ROOT'] . '/lib/Zend/Cache/Backend/ExtendedInterface.php');
			require_once($_SERVER['DOCUMENT_ROOT'] . '/app/code/core/Zend/Cache/Backend/Redis.php');
			$options = array();
			$options['server'] = (string)Mage::getConfig()->getNode('lightspeed/cache/backend_options/server');
			$options['port'] = (int)Mage::getConfig()->getNode('lightspeed/cache/backend_options/port');
			$options['database'] = (int)Mage::getConfig()->getNode('lightspeed/cache/backend_options/database');
			$options['timeout'] = (int)Mage::getConfig()->getNode('lightspeed/cache/backend_options/timeout');
			$options['force_standalone'] = (int)Mage::getConfig()->getNode('lightspeed/cache/backend_options/force_standalone');
			$options['automatic_cleaning_factor'] = (int)Mage::getConfig()->getNode('lightspeed/cache/backend_options/automatic_cleaning_factor');
			$this->_enabled = true;
			$this->_server = new Zend_Cache_Backend_Redis($options);
		}
		return $this->_server;
	}
	
	public function save($key, $data, $expires=0, array $tags=array()) {
		$server = $this->getServer();
		if ($server && $this->_enabled) {
			$server->save(serialize($data), $key, $tags, $expires);
		}
	}
	
	public function cleanByTag($tag) {
		if ($this->_server) {
			$this->_server->_removeByMatchingTags($tag);
		}
	}
	
	public function clean($tags=array()) {
		if ($this->_server) {
			if (count($tags) && !in_array('LIGHTSPEED', $tags)) {
				$this->_server->_removeByMatchingTags($tags);
			}
			else {
				$this->_server->clean(Zend_Cache::CLEANING_MODE_ALL, $tags);
			}
		}
	}
}