Method getConnection

/**
 * Create the Redis connection
 *
 * @return  \Redis|boolean  Redis connection object on success, boolean on failure
 *
 * @since   3.4
 * @note    As of 4.0 this method will throw a JCacheExceptionConnecting object on connection failure
 */
protected function getConnection()
{
    if (static::isSupported() == false) {
        return false;
    }
    $app = Factory::getApplication();
    $this->_persistent = $app->get('redis_persist', true);
    $server = array('host' => $app->get('redis_server_host', 'localhost'), 'port' => $app->get('redis_server_port', 6379), 'auth' => $app->get('redis_server_auth', null), 'db' => (int) $app->get('redis_server_db', null));
    // If you are trying to connect to a socket file, ignore the supplied port
    if ($server['host'][0] === '/') {
        $server['port'] = 0;
    }
    static::$_redis = new \Redis();
    try {
        if ($this->_persistent) {
            $connection = static::$_redis->pconnect($server['host'], $server['port']);
        } else {
            $connection = static::$_redis->connect($server['host'], $server['port']);
        }
    } catch (\RedisException $e) {
        $connection = false;
        Log::add($e->getMessage(), Log::DEBUG);
    }
    if ($connection == false) {
        static::$_redis = null;
        throw new CacheConnectingException('Redis connection failed', 500);
    }
    try {
        $auth = $server['auth'] ? static::$_redis->auth($server['auth']) : true;
    } catch (\RedisException $e) {
        $auth = false;
        Log::add($e->getMessage(), Log::DEBUG);
    }
    if ($auth === false) {
        static::$_redis = null;
        throw new CacheConnectingException('Redis authentication failed', 500);
    }
    $select = static::$_redis->select($server['db']);
    if ($select == false) {
        static::$_redis = null;
        throw new CacheConnectingException('Redis failed to select database', 500);
    }
    try {
        static::$_redis->ping();
    } catch (\RedisException $e) {
        static::$_redis = null;
        throw new CacheConnectingException('Redis ping failed', 500);
    }
    return static::$_redis;
}