I don't know why you usse this class to save session handler... but if you
use php with apache you can configure in php.ini session.save_handler to web
server save in memcached the sessionid.
regards.
2008/2/29, Mickael Gentil <[EMAIL PROTECTED]>:
>
> Hi all,
>
> In first, I'm not familiar with the memcache object.
>
> I had to develop a memcache object wich must work with our actual sessions
> files (and not database session).
>
> I used the init handler session and his callback functions.
>
> But in the architecture of the web site in our production environment, we
> have 2 web server with memcache installed (on both) behind a load balancer.
> And the cached session must be accessible on both of them.
>
> This is my class :
>
> class MemcacheSession {
>
> /********************************************
> * CONSTANTS *
> * ******************************************/
>
> const DEFAULT_HOST = "127.0.0.1";
> const DEFAULT_PORT = 11211;
> const DEFAULT_COMPRESSION = MEMCACHE_COMPRESSED;
>
> /*******************************************
> * PRIVATE VARS *
> * ******************************************/
>
> private $servers;
> private $memcache;
>
> /*******************************************
> * PUBLIC VARS *
> * ******************************************/
>
> public $lifeTime;
>
> /*******************************************
> * SINGLETON *
> * ******************************************/
>
> private static $instance = null;
>
> public static function getInstance() {
> if (empty(self::$instance)) {
> self::$instance = new MemcacheSession();
> }
> return self::$instance;
> }
>
> /*******************************************
> * CONSTRUCTOR *
> * ******************************************/
>
> private function __construct() {
> $this->memcache = new Memcache;
> $this->servers = array();
> }
>
> /*******************************************
> * PUBLIC METHODS *
> * ******************************************/
>
> public function start() {
>
> $this->initSaveHandler();
>
> if(empty($this->servers)){
> $this->servers[] = array(self::DEFAULT_HOST=>self::DEFAULT_PORT);
> }
> for ($i = 0, $n = count($this->servers); $i < $n; ++$i){
> $this->memcache->addServer(key($this->servers[$i]),
> current($this->servers[$i]));
> }
> }
>
> public function addServer(array $server){
> $this->servers[] = array($server[0]=>$server[1]);
> }
>
> public function addMultipleServer(array $server){
> for ($i = 0, $n = count($server); $i < $n; ++$i){
> $this->servers[] = $server[$i];
> }
> }
>
> /*******************************************
> * PRIVATE METHODS *
> * ******************************************/
>
> private function initSaveHandler(){
> session_set_save_handler(array(&$this,"sessionOpenCb"),
> array(&$this,"sessionCloseCb"),
> array(&$this,"sessionReadCb"),
> array(&$this,"sessionWriteCb"),
> array(&$this,"sessionDestroyCb"),
> array(&$this,"sessionGcCb"));
> }
>
> /*******************************************
> * CALLBACK METHODS *
> * ******************************************/
>
> public function sessionOpenCb($savePath, $sessName) {
> return $this->lifeTime = get_cfg_var("session.gc_maxlifetime");
> }
>
> public function sessionCloseCb() {
> return $this->sessionGcCb(ini_get('session.gc_maxlifetime'));
> }
>
> public function sessionReadCb($sessID) {
> return $this->memcache->get($sessID);
> }
>
> public function sessionWriteCb($sessID,$sessData) {
> return $this->memcache->set($sessID, $sessData,
> self::DEFAULT_COMPRESSION, $this->lifeTime) or false;
> }
>
> public function sessionDestroyCb($sessID) {
> return $this->memcache->delete($sessID);
> }
>
> public function sessionGcCb($sessMaxLifeTime) {}
>
> }
>
> And his implementation :
>
> $memcacheSess = MemcacheSession::getInstance();
> $memcacheSess->addServer(array('192.168.0.1','11211'));
> $memcacheSess->addServer(array('192.168.0.2','11211'));
> $memcacheSess->start();
>
> session_start();
>
> And after we use the standard procedure of $_SESSION object.
>
> In the memcache log (on both servers) i can see some
> get/set/stored/deleted events.
>
> But the session is not accessible on the both server and i can't access to
> my information where the session is not write by the $_SESSION object.
>
> Someone can help me on this particular problem ?
>
> Thanks a lot.
>
> Mickaël.
>
>
