private function computeFingerPrint($name, Channel $channel, Exchange $exchange)
    {
        return sha1($channel->getIdentity() . $exchange->getName() . $name);
    }
private function computeFingerPrint($name, Channel $channel, Exchange $exchange)
    {
        return sha1($channel->getIdentity() . $exchange->getName() . $name);
    }
@param string   $name
@param Channel  $channel
@param Exchange $exchange

@return string