array( 'default_host' => '127.0.0.1', 'default_port' => 11211, 'default_weight' => 1 ) ); // ------------------------------------------------------------------------ /** * Fetch from cache * * @param mixed unique key id * @return mixed data on success/false on failure */ public function get($id) { $data = $this->_memcached->get($id); return (is_array($data)) ? $data[0] : FALSE; } // ------------------------------------------------------------------------ /** * Save * * @param string unique identifier * @param mixed data being cached * @param int time to live * @return boolean true on success, false on failure */ public function save($id, $data, $ttl = 60) { return $this->_memcached->set($id, array($data, time(), $ttl), $ttl); } // ------------------------------------------------------------------------ /** * Delete from Cache * * @param mixed key to be deleted. * @return boolean true on success, false on failure */ public function delete($id) { return $this->_memcached->delete($id); } // ------------------------------------------------------------------------ /** * Clean the Cache * * @return boolean false on failure/true on success */ public function clean() { return $this->_memcached->flush(); } // ------------------------------------------------------------------------ /** * Cache Info * * @param null type not supported in memcached * @return mixed array on success, false on failure */ public function cache_info($type = NULL) { return $this->_memcached->getStats(); } // ------------------------------------------------------------------------ /** * Get Cache Metadata * * @param mixed key to get cache metadata on * @return mixed FALSE on failure, array on success. */ public function get_metadata($id) { $stored = $this->_memcached->get($id); if (count($stored) !== 3) { return FALSE; } list($data, $time, $ttl) = $stored; return array( 'expire' => $time + $ttl, 'mtime' => $time, 'data' => $data ); } // ------------------------------------------------------------------------ /** * Setup memcached. */ private function _setup_memcached() { // Try to load memcached server info from the config file. $CI =& get_instance(); if ($CI->config->load('memcached', TRUE, TRUE)) { if (is_array($CI->config->config['memcached'])) { $this->_memcache_conf = NULL; foreach ($CI->config->config['memcached'] as $name => $conf) { $this->_memcache_conf[$name] = $conf; } } } if (class_exists('Memcached')) { $this->_memcached = new Memcached(); } else if (class_exists('Memcache')) { $this->_memcached = new Memcache(); } else { log_message('error', 'Failed to create object for Memcached Cache; extension not loaded?'); return FALSE; } foreach ($this->_memcache_conf as $name => $cache_server) { if ( ! array_key_exists('hostname', $cache_server)) { $cache_server['hostname'] = $this->_default_options['default_host']; } if ( ! array_key_exists('port', $cache_server)) { $cache_server['port'] = $this->_default_options['default_port']; } if ( ! array_key_exists('weight', $cache_server)) { $cache_server['weight'] = $this->_default_options['default_weight']; } if (get_class($this->_memcached) == 'Memcache') { // Third parameter is persistance and defaults to TRUE. $this->_memcached->addServer( $cache_server['hostname'], $cache_server['port'], TRUE, $cache_server['weight'] ); } else { $this->_memcached->addServer( $cache_server['hostname'], $cache_server['port'], $cache_server['weight'] ); } } return TRUE; } // ------------------------------------------------------------------------ /** * Is supported * * Returns FALSE if memcached is not supported on the system. * If it is, we setup the memcached object & return TRUE */ public function is_supported() { if ( ! extension_loaded('memcached') && ! extension_loaded('memcache')) { log_message('error', 'The Memcached Extension must be loaded to use Memcached Cache.'); return FALSE; } return $this->_setup_memcached(); } // ------------------------------------------------------------------------ } // End Class /* End of file Cache_memcached.php */ /* Location: ./system/libraries/Cache/drivers/Cache_memcached.php */