@Override
public String doEcho(String msg) throws Exception {
EchoRequestProto req = EchoRequestProto.newBuilder()
.setMessage(msg)
.build();
EchoResponseProto responseProto = proxy.echo(null, req);
return responseProto.getMessage();
}
};
} else if (opts.rpcEngine == WritableRpcEngine.class) {
final TestProtocol proxy = (TestProtocol)RPC.getProxy(