gf/example/trace/grpc_with_db/protocol/user/user.proto

// protoc --gofast_out=plugins=grpc:. protocol/user/*.proto -I/Users/john/Workspace/Go/GOPATH/src -I/Users/john/Workspace/Go/GOPATH/src/gitee.com/johng/katyusha/.examples/tracing
syntax = "proto3";

package user;

option go_package = "protobuf/user";

import "github.com/gogo/protobuf/gogoproto/gogo.proto";

// User service for tracing demo.
service User {
  rpc Insert(InsertReq) returns (InsertRes) {}
  rpc Query(QueryReq) returns (QueryRes) {}
  rpc Delete(DeleteReq) returns (DeleteRes) {}
}

message InsertReq {
  string Name = 1 [(gogoproto.moretags) = 'v:"required#Please input user name."'];
}

message InsertRes {
  int32 Id = 1;
}

message QueryReq {
  int32 Id = 1 [(gogoproto.moretags) = 'v:"min:1#User id is required for querying."'];
}

message QueryRes {
  int32  Id = 1;
  string Name = 2;
}

message DeleteReq {
  int32 Id = 1 [(gogoproto.moretags) = 'v:"min:1#User id is required for deleting."'];
}

message DeleteRes {}