protocol.getMessages().put("ack", message);
// call a server over a stateless protocol that has a one-way "ack"
GenericRequestor requestor =
new GenericRequestor(protocol, createTransceiver());
requestor.request("ack", new GenericData.Record(message.getRequest()));
// make the request again, to better test handshakes w/ differing protocols
requestor.request("ack", new GenericData.Record(message.getRequest()));
}