add comments, code refactor

pkg/uuid/uuid_container.go

@@ -5,14 +5,17 @@ import (
 	"github.com/mayswind/lab/pkg/settings"
 )
 
+// UuidContainer contains the current uuid generator
 type UuidContainer struct {
 	Current UuidGenerator
 }
 
+// Initialize a uuid container singleton instance
 var (
 	Container = &UuidContainer{}
 )
 
+// InitializeUuidGenerator initialized the current uuid generator according to the config
 func InitializeUuidGenerator(config *settings.Config) error {
 	if config.UuidGeneratorType == settings.UUID_GENERATOR_TYPE_INTERNAL {
 		generator, err := NewInternalUuidGenerator(config)
@@ -24,6 +27,7 @@ func InitializeUuidGenerator(config *settings.Config) error {
 	return errs.ErrInvalidUuidMode
 }
 
+// GenerateUuid returns a new uuid by the current uuid generator
 func (u *UuidContainer) GenerateUuid(uuidType UuidType) int64 {
 	return u.Current.GenerateUuid(uuidType)
 }