syntax = "proto3"; option java_multiple_files = true; option java_package = "org.apache.skywalking.apm.network.proto"; import "KeyWithIntegerValue.proto"; //register service for ApplicationCode, this service is called when service starts. service ApplicationRegisterService { rpc applicationCodeRegister (Application) returns (ApplicationMapping) { } } message Application { string applicationCode = 1; } message ApplicationMapping { KeyWithIntegerValue application = 1; }