protected function subscribeAtPubnub()
{
if (!$this->alive()) {
throw new Exception('Subscription is not alive');
}
$this->_pubnub = $this->_pubnubFactory->pubnub(array('publish_key' => 'convince-pubnub-its-okay', 'subscribe_key' => $this->_subscription['deliveryMode']['subscriberKey']));
$this->_pubnub->setSubscribeTimeout(self::SUBSCRIBE_TIMEOUT);
$this->_pubnub->subscribe($this->_subscription['deliveryMode']['address'], array($this, 'notify'), 0, false, array($this, 'pubnubTimeoutHandler'));
return $this;
}