alternate-foo.go

package fooservice

import (
	"github.com/segmentio/ksuid"

  idgen "github.com/lusis/foobar/idgen"
	pb "github.com/lusis/foobar/pb"
	storer "github.com/lusis/foobar/storer"
)

// FooService implements the pb.FooService
type FooService struct {
	pb.UnimplementedFooServiceServer
	store  storer.FooEntriesStorer
	idFunc idgen.IDFunc
}


// New ...
func New(store storer.FooEntriesStorer) (*FooService, error) {
	return &FooService{
		store:  store,
		idFunc: idgen.DefaultIDFunc,
	}, nil
}

alternate-idgen.go

package idgen

type IDFunc func() string

func DefaultIDFunc() string {
  return ksuid.New().String()
}

foo.go

package fooservice

import (
	"github.com/segmentio/ksuid"

	pb "github.com/lusis/foobar/pb"
	storer "github.com/lusis/foobar/storer"
)

// FooService implements the pb.FooService
type FooService struct {
	pb.UnimplementedFooServiceServer
	store  storer.FooEntriesStorer
	idFunc func() string
}

func defaultIDFunc() string {
	return ksuid.New().String()
}

// New ...
func New(store storer.FooEntriesStorer) (*FooService, error) {
	return &FooService{
		store:  store,
		idFunc: defaultIDFunc,
	}, nil
}