Distributed Services with Go

Define Your Domain Types as Protocol Buffers

In the previous chapter, we defined our Record type in Go as this struct:

LetsGo/internal/server/log.go

type Record struct {
        Value  []byte `json:"value"`
        Offset uint64 `json:"offset"`
}

To turn that into a protobuf message we need to convert the Go code into protobuf syntax.

The convention for Go projects is to put your protobuf in an api directory. So run mkdir -p api/v1 to create your directories, then create a file called log.proto in the v1 directory and put this code in it:

StructureDataWithProtobuf/api/v1/log.proto

syntax = "proto3";

package log.v1;

option go_package = "github.com/travisjeffery/api/log_v1";

message Record {
  bytes value = 1;
  uint64 ...