syntax = "proto3"; option java_multiple_files = true; package org.apache.dubbo.sample.tri; // The request message containing the user's name. message GreeterRequest{ string name = 1; } // The response message containing the greetings message GreeterReply { string message = 1; } service Greeter{ // unary rpc greet(GreeterRequest) returns (GreeterReply); }