PHP Memcached类代码示例

    public function validate()
    {/*{{{*/
        $debugger = new Debugger();
        $memcacheTime = $msg = '';
        foreach ($this->hosts as $memcache)
        {
            $start = $debugger->getTimeStamp();
            $m = new Memcached;
            $m->addServer($memcache['host'], $memcache['port']);
			$m->set('monitortest', 'haha', 10);
			$res = $m->get('monitortest');
            $end = $debugger->getTimeStamp();
            $diff = $debugger->timeDiff($start, $end);
            $key = $memcache['host'].':'.$memcache['port'];
            if (false == $res || 'haha' != $res)
            {
                $msg .= $key.'memcacheʧЧ,';
            }
            if ($this->maxConnectTime < $diff)
            {
                $msg .= $key.'Á¬½Ó'.substr($diff, 0, 6).'ms,';
            }
            $memcacheTime .= "$diff ";
        }
        error_log(date('Y-m-d H:i:s').' '.rtrim($memcacheTime)."\n", 3, '/tmp/memcache_time.log');
        if ($msg)
        {
            error_log(date('Y-m-d H:i:s').' '.$msg."\n", 3, '/tmp/memcache.log');
        }
        return $msg;
    }/*}}}*/

 public static function getMemcachedInstance($storageEngineConfig = null)
 {
     $serverIp = '';
     $serverPort = '';
     if (!is_null($storageEngineConfig)) {
         $serverIp = $storageEngineConfig['ip'];
         $serverPort = $storageEngineConfig['port'];
     } else {
         $registry = \Litpi\Registry::getInstance();
         $conf = $registry->get('conf');
         $serverIp = $conf['memcached'][0]['ip'];
         $serverPort = $conf['memcached'][0]['port'];
     }
     $output = null;
     try {
         $memcached = null;
         if (class_exists('Memcached', false)) {
             $memcached = new \Memcached();
             $memcached->addServer($serverIp, $serverPort);
         } else {
             //Wrapper memcache in Windows
             $memcached = new \Litpi\Memcached();
             $memcached->addServer($serverIp, $serverPort);
         }
         $output = $memcached;
     } catch (\Exception $e) {
         //Can not connect to Memcache Server
         echo 'Can not connect to Memcache Server';
     }
     return $output;
 }

 public function register(Application $app)
 {
     $app->setParameter('cache', ['namespace' => null, 'type' => 'array']);
     $app->singleton('cache', function () use($app) {
         $cache = null;
         $type = $app->getParameter('cache.type', 'array');
         if ($type == 'array') {
             $cache = new ArrayCache();
         } elseif ($type == 'apc') {
             $cache = new ApcCache();
         } elseif ($type == 'xcache') {
             $cache = new XcacheCache();
         } elseif ($type == 'memcache') {
             $cache = new MemcacheCache();
             $memcache = new \Memcache();
             $memcache->addserver($app->getParameter('cache.memcached.host', '127.0.0.1'), $app->getParameter('cache.memcached.port', 11211));
             $cache->setMemcache($memcache);
         } elseif ($type == 'memcached') {
             $cache = new MemcachedCache();
             $memcached = new \Memcached();
             $memcached->addServer($app->getParameter('cache.memcached.host', '127.0.0.1'), $app->getParameter('cache.memcached.port', 11211));
             $cache->setMemcached($memcached);
         }
         $cache->setNamespace($app->getParameter('cache.namespace'));
         return $cache;
     });
 }

 public function handler()
 {
     if (!empty($this->storage)) {
         $handler = $this->handler;
     } else {
         $config = $this->_getConfig()->read();
         $handlerName = $config['handler'];
         $handlerConfig = isset($config['config']) ? $config['config'] : array();
         switch ($handlerName) {
             case 'memcache':
                 if (!isset($handlerConfig['host']) || !isset($handlerConfig['port'])) {
                     throw new RuntimeException('You must specify memcache host and port in handler config in "' . self::CONFIG_FILE . '"');
                 }
                 $memcache = new \Memcache();
                 $memcache->addServer($handlerConfig['host'], (int) $handlerConfig['port']);
                 $handler = new MemcacheSessionHandler($memcache);
                 break;
             case 'memcached':
                 if (!isset($handlerConfig['host']) || !isset($handlerConfig['port'])) {
                     throw new RuntimeException('You must specify memcache host and port in handler config in "' . self::CONFIG_FILE . '"');
                 }
                 $memcached = new \Memcached();
                 $memcached->addServer($handlerConfig['host'], (int) $handlerConfig['port']);
                 $handler = new MemcachedSessionHandler($memcached);
                 break;
             case 'native':
             default:
                 $handler = new NativeSessionHandler();
         }
     }
     return $handler;
 }

 private function skipIfMemcacheIsNotRunning(\Memcached $client)
 {
     $memcacheAddress = self::MEMCACHED_HOST . ':' . self::MEMCACHED_PORT;
     if (!isset($client->getStats()[$memcacheAddress])) {
         $this->markTestSkipped('You need a running memcached to run the integration tests!');
     }
 }

function check_login()
{
    global $db, $mem;
    if (defined('MEM') && MEM == True) {
        $mem = new Memcached('moyoj');
        $mem->setOption(Memcached::OPT_LIBKETAMA_COMPATIBLE, true);
        if (!count($mem->getServerList())) {
            $mem->addServer(MEM_HOST, MEM_PORT);
        }
    }
    $db = new DB();
    $db->init(DB_HOST, DB_USER, DB_PASS, DB_NAME);
    $db->connect();
    $admin_info = mo_read_cache('mo-admin-' . $_SESSION['aid']);
    if (!$admin_info) {
        $sql = 'SELECT `id`, `username`, `password`, `nickname`, `role` FROM `mo_admin` WHERE `id` = ? AND `role` > 0';
        $db->prepare($sql);
        $db->bind('i', $_SESSION['aid']);
        $result = $db->execute();
        if (!$result || $result[0]['password'] != $_SESSION['admin_password']) {
            unset($_SESSION['aid']);
            header("Location: login.php");
            exit(0);
        }
        mo_write_cache('mo-admin-' . $_SESSION['aid'], $result[0]);
    }
    $mo_settings = array();
    mo_load_settings();
    if (!isset($active)) {
        $active = '';
    }
}

 /**
  * 通过加锁机制在cache失效时并发时只透传一个请求到后端子系统
  * @param $method string 方法名
  * @param $params array  参数列表
  * @param $key    string 缓存key
  */
 public static function cacheStrategyOnce($method, $params, $key, $expire = 100)
 {
     // 做法相似，只是需要把概率判断的算法换成使用锁保证高并发请求时严格只有一个请求透传到后端系统
     $csfKey = self::getCSTKey($key, 1);
     $lockKey = self::getCSTLockKey($key, 1);
     $memcached = new Memcached();
     $memcached->addServer('127.0.0.1', 11211);
     $value = $memcached->get($csfKey);
     if (!empty($value) && !empty($value['data']) && !empty($value['doubleExpire'])) {
         $doubleExpire = $value['doubleExpire'];
         if (time() <= $doubleExpire - $expire) {
             // cache还在[start, start + expire]时间内仍有效，无需请求后端
             return $value['data'];
         }
         $isLock = $memcached->get($lockKey);
         if (!empty($lockKey)) {
             // 有锁,表示当前已有请求到后端去读取最新数据并更新cache；
             return $value['data'];
         }
     }
     // cache已过期或者无锁，到后台实时请求并更新cache
     $ret = $memcached->set($lockKey, 1, 1);
     $data = self::$method($params);
     if (isset($data['resultCode']) && $data['resultCode'] == 0) {
         unset($data['resultCode']);
         $doubleExpire = time() + 2 * $expire;
         $value = array('data' => $data, 'doubleExpire' => $doubleExpire);
         $ret = $memcached->set($csfKey, $value, $doubleExpire);
     }
     $ret = $memcached->delete($lockKey, 1);
     return $data;
 }

/**
 * Safe update json in Memcached storage
 * @param Memcached $Memcached
 * @param string $key
 * @param array $array
 * @throws Exception
 */
function updateJsonInMemcached(\Memcached $Memcached, $key, array $array)
{
    // Create new Lock instance
    $Lock = new MemcachedLock($Memcached, 'Lock_' . $key, MemcachedLock::FLAG_CATCH_EXCEPTIONS);
    // Acquire lock for 2 sec.
    // If lock has acquired in another thread then we will wait 3 second,
    // until another thread release the lock. Otherwise it throws a exception.
    if (!$Lock->acquire(2, 3)) {
        throw new Exception('Can\'t get a Lock');
    }
    // Get value from storage
    $json = $Memcached->get($key);
    if (!$json) {
        $jsonArray = [];
    } else {
        $jsonArray = json_decode($json, true);
    }
    // Some operations with json
    $jsonArray = array_merge($jsonArray, $array);
    $json = json_encode($jsonArray);
    // Update key in storage
    $Memcached->set($key, $json);
    // Release the lock
    // After $lock->release() another waiting thread (Lock) will be able to update json in storage
    $Lock->release();
}

 public function __call($method, $args)
 {
     if ($this->driver === null) {
         switch (config()->cache_driver()) {
             case 'memcached':
                 $memcached = new \Memcached();
                 $memcached->addServer(config()->cache_host(), 11211);
                 $this->driver = new \Doctrine\Common\Cache\MemcachedCache();
                 $this->driver->setMemcached($memcached);
                 break;
             case 'apc':
                 $this->driver = new \Doctrine\Common\Cache\ApcCache();
                 break;
         }
     }
     switch ($method) {
         case 'set':
             // $this->driver->delete($args[0]);
             $this->driver->save($args[0], json_encode($args[1]));
             break;
         case 'get':
             return json_decode($this->driver->fetch($args[0]));
             break;
     }
 }

 private function __construct()
 {
     if (defined('MEMCACHE_SERVERS')) {
         try {
             // create a new persistent client
             $m = new Memcached("memcached_pool");
             $m->setOption(Memcached::OPT_BINARY_PROTOCOL, TRUE);
             // some nicer default options
             $m->setOption(Memcached::OPT_NO_BLOCK, TRUE);
             $m->setOption(Memcached::OPT_AUTO_EJECT_HOSTS, TRUE);
             $m->setOption(Memcached::OPT_CONNECT_TIMEOUT, 2000);
             $m->setOption(Memcached::OPT_POLL_TIMEOUT, 2000);
             $m->setOption(Memcached::OPT_RETRY_TIMEOUT, 2);
             // setup authentication
             if (defined('MEMCACHE_USERNAME') && defined('MEMCACHE_PASSWORD')) {
                 $m->setSaslAuthData(MEMCACHE_USERNAME, MEMCACHE_PASSWORD);
             }
             // We use a consistent connection to memcached, so only add in the
             // servers first time through otherwise we end up duplicating our
             // connections to the server.
             if (!$m->getServerList()) {
                 // parse server config
                 $servers = explode(",", MEMCACHE_SERVERS);
                 foreach ($servers as $s) {
                     $parts = explode(":", $s);
                     $m->addServer($parts[0], $parts[1]);
                 }
             }
         } catch (Exception $e) {
             $this->objCache = false;
         }
     } else {
         $this->objCache = false;
     }
 }

 public function testCheck_RequestRate_MemcachedCollector()
 {
     $detector = new Detector();
     $status = new \stdClass();
     $status->ok = null;
     $detector->setKey('someKey')->declareProcessor('requestRate', function (RequestRateProcessor $processor, Detector $detector) {
         /* @var $processor \Sokil\FraudDetector\Processor\RequestRateProcessor */
         $processor->setCollector($detector->createCollector('memcached', 'requestRate', 5, 1, function ($collector) {
             /* @var $collector \Sokil\FraudDetector\Collector\MemcachedCollector */
             $memcached = new \Memcached();
             $memcached->addServer('127.0.0.1', 11211);
             $collector->setMemcached($memcached);
         }));
     })->onCheckPassed(function () use($status) {
         $status->ok = true;
     })->onCheckFailed(function () use($status) {
         $status->ok = false;
     });
     for ($i = 0; $i < 5; $i++) {
         $detector->check();
         $this->assertTrue($status->ok);
     }
     $detector->check();
     $this->assertFalse($status->ok);
     usleep(2000000.0);
     $detector->check();
     $this->assertTrue($status->ok);
 }

 /**
  * @return \Memcached
  */
 protected function getMemcached()
 {
     $Memcached = new \Memcached();
     $Memcached->addServers($this->getTestServers());
     $Memcached->flush();
     return $Memcached;
 }

 protected function init()
 {
     $this->config['host'] = $this->config['host'] ?: 'localhost';
     $this->config['port'] = $this->config['port'] ?: 11211;
     $this->store = new Memcached();
     $this->store->addServer($this->config['host'], $this->config['port'], 100);
 }

 public function process()
 {
     $id = $this->get('id');
     $state = (string) $this->get('state');
     if (!$this->is_moderator()) {
         throw new ErrorApi(ErrorApi::INSUFFICIENT_RIGHTS);
     }
     if (empty($id) || empty($state)) {
         throw new ErrorApi(ErrorApi::MISSING_INPUT);
     }
     $state = Meta::parse($state);
     if (empty($state)) {
         throw new ErrorApi(ErrorApi::INCORRECT_INPUT);
     }
     $this->db->update('art', array('sortdate' => $this->db->unix_to_date()), $id);
     $this->remove_meta(Meta::ART, $id, Meta::STATE, Meta::STATE_APPROVED);
     $this->remove_meta(Meta::ART, $id, Meta::STATE, Meta::STATE_UNAPPROVED);
     $this->remove_meta(Meta::ART, $id, Meta::STATE, Meta::STATE_DISAPPROVED);
     $this->remove_meta(Meta::ART, $id, Meta::STATE, Meta::STATE_DELETED);
     $this->add_meta(Meta::ART, $id, Meta::STATE, $state);
     $cache = new \Memcached("access_checker");
     $cache->addServer("localhost", 11211);
     $cache->delete('is_pic_safe_' . $this->db->get_field('art', 'md5', $id));
     $this->set_success(true);
 }

 public function populate()
 {
     $m = new Memcached();
     $m->addServer('localhost', 11211);
     $m->set('int', 99);
     return $m->get('int');
 }