/**
* Refreshes channel users data.
*
* @return null
*/
public function refreshChannelUsersData()
{
$this->channelUsersDAO->deleteOlderByLastActivityTime(self::USERS_PRESENCE_TIME_FRAME);
$this->channelUsersDAO->updateActiveForOlderByLastActivityTime(false, self::USERS_ACTIVITY_TIME_FRAME);
}