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migrate.go
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migrate.go
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package mig002
import (
"bytes"
"fmt"
"os"
dsc2 "github.com/aserto-dev/go-directory/aserto/directory/common/v2"
"github.com/aserto-dev/go-directory/pkg/pb"
"github.com/aserto-dev/go-edge-ds/pkg/bdb"
"github.com/aserto-dev/go-edge-ds/pkg/bdb/migrate/mig"
"github.com/aserto-dev/go-edge-ds/pkg/ds"
"github.com/rs/zerolog"
"github.com/Masterminds/semver"
"github.com/pkg/errors"
bolt "go.etcd.io/bbolt"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/structpb"
)
const (
Version string = "0.0.2"
)
var (
ObjectTypesNamePath = []string{"object_types_name"}
RelationTypesNamePath = []string{"relation_types_name"}
PermissionsNamePath = []string{"permissions_name"}
ObjectsKeyPath = []string{"objects_key"}
)
func MigrationVersion() *semver.Version {
migVersion, _ := semver.NewVersion(Version)
return migVersion
}
type modelType interface {
*dsc2.ObjectType | *dsc2.RelationType | *dsc2.Permission
proto.Message
GetName() string
}
type objectType interface {
*dsc2.Object
proto.Message
GetType() string
GetKey() string
GetProperties() *structpb.Struct
}
type relationType interface {
*dsc2.Relation
proto.Message
GetSubject() *dsc2.ObjectIdentifier
GetRelation() string
GetObject() *dsc2.ObjectIdentifier
}
var fnMap = []func(*zerolog.Logger, *bolt.DB, *bolt.DB) error{
mig.DeleteBucket(bdb.ObjectTypesPath),
mig.DeleteBucket(ObjectTypesNamePath),
mig.CreateBucket(bdb.ObjectTypesPath),
updateModelTypes(bdb.ObjectTypesPath, &dsc2.ObjectType{}),
mig.DeleteBucket(bdb.RelationTypesPath),
mig.DeleteBucket(RelationTypesNamePath),
mig.CreateBucket(bdb.RelationTypesPath),
updateModelTypes(bdb.RelationTypesPath, &dsc2.RelationType{}),
mig.DeleteBucket(bdb.PermissionsPath),
mig.DeleteBucket(PermissionsNamePath),
mig.CreateBucket(bdb.PermissionsPath),
updateModelTypes(bdb.PermissionsPath, &dsc2.Permission{}),
mig.DeleteBucket(bdb.ObjectsPath),
mig.DeleteBucket(ObjectsKeyPath),
mig.CreateBucket(bdb.ObjectsPath),
updateObjects(bdb.ObjectsPath, &dsc2.Object{}),
mig.DeleteBucket(bdb.RelationsObjPath),
mig.DeleteBucket(bdb.RelationsSubPath),
mig.CreateBucket(bdb.RelationsObjPath),
mig.CreateBucket(bdb.RelationsSubPath),
updateRelations(bdb.RelationsObjPath, &dsc2.Relation{}, ds.ObjectToSubject),
updateRelations(bdb.RelationsSubPath, &dsc2.Relation{}, ds.SubjectToObject),
}
func Migrate(log *zerolog.Logger, roDB, rwDB *bolt.DB) error {
log.Info().Str("version", Version).Msg("StartMigration")
for _, fn := range fnMap {
if err := fn(log, roDB, rwDB); err != nil {
return err
}
}
log.Info().Str("version", Version).Msg("FinishedMigration")
return nil
}
// updateModelTypes, read values from read-only backup, write to new bucket.
func updateModelTypes[T modelType](path bdb.Path, v T) func(*zerolog.Logger, *bolt.DB, *bolt.DB) error {
return func(log *zerolog.Logger, roDB *bolt.DB, rwDB *bolt.DB) error {
log.Info().Str("version", Version).Msg("UpdateModelTypes")
if err := roDB.View(func(rtx *bolt.Tx) error {
wtx, err := rwDB.Begin(true)
if err != nil {
return err
}
defer func() { _ = wtx.Rollback() }()
b, err := mig.SetBucket(rtx, path)
if err != nil {
return err
}
c := b.Cursor()
for key, value := c.First(); key != nil; key, value = c.Next() {
if err := pb.BufToProto(bytes.NewReader(value), any(v).(proto.Message)); err != nil {
return err
}
buf := new(bytes.Buffer)
if err := pb.ProtoToBuf(buf, v); err != nil {
return err
}
if err := mig.SetKey(wtx, path, keyModelType(v), buf.Bytes()); err != nil {
return err
}
}
return wtx.Commit()
}); err != nil {
return err
}
return nil
}
}
func keyModelType[T modelType](v T) []byte {
var i interface{} = v
switch msg := i.(type) {
case *dsc2.ObjectType:
return []byte(msg.GetName())
case *dsc2.Permission:
return []byte(msg.GetName())
case *dsc2.RelationType:
return []byte(msg.GetObjectType() + ds.TypeIDSeparator + msg.GetName())
}
return []byte{}
}
// updateObjects, read values from read-only backup, write to new bucket.
func updateObjects[T objectType](path bdb.Path, v T) func(*zerolog.Logger, *bolt.DB, *bolt.DB) error {
return func(log *zerolog.Logger, roDB *bolt.DB, rwDB *bolt.DB) error {
log.Info().Str("version", Version).Msg("UpdateObjects")
if err := roDB.View(func(rtx *bolt.Tx) error {
wtx, err := rwDB.Begin(true)
if err != nil {
return err
}
defer func() { _ = wtx.Rollback() }()
b, err := mig.SetBucket(rtx, path)
if err != nil {
return err
}
c := b.Cursor()
for key, value := c.First(); key != nil; key, value = c.Next() {
if err := pb.BufToProto(bytes.NewReader(value), any(v).(proto.Message)); err != nil {
return err
}
buf := new(bytes.Buffer)
if err := pb.ProtoToBuf(buf, v); err != nil {
return err
}
newKey := v.GetType() + ds.TypeIDSeparator + v.GetKey()
if err := mig.SetKey(wtx, path, []byte(newKey), buf.Bytes()); err != nil {
return err
}
}
return wtx.Commit()
}); err != nil {
return err
}
return nil
}
}
// updateRelations, read values from read-only backup, write to new bucket.
func updateRelations[T relationType](path bdb.Path, v T, d ds.Direction) func(*zerolog.Logger, *bolt.DB, *bolt.DB) error {
return func(log *zerolog.Logger, roDB *bolt.DB, rwDB *bolt.DB) error {
log.Info().Str("version", Version).Msg("UpdateRelations")
if err := roDB.View(func(rtx *bolt.Tx) error {
wtx, err := rwDB.Begin(true)
if err != nil {
return err
}
defer func() { _ = wtx.Rollback() }()
b, err := mig.SetBucket(rtx, path)
if err != nil {
return err
}
c := b.Cursor()
for key, value := c.First(); key != nil; key, value = c.Next() {
if err := pb.BufToProto(bytes.NewReader(value), any(v).(proto.Message)); err != nil {
return err
}
buf := new(bytes.Buffer)
if err := pb.ProtoToBuf(buf, v); err != nil {
return err
}
if v.GetObject().GetKey() == "" || v.GetSubject().GetKey() == "" {
return errors.Wrapf(os.ErrInvalid, "relation does not contain key values")
}
newKey := relKey(v, d)
if err := mig.SetKey(wtx, path, []byte(newKey), buf.Bytes()); err != nil {
return err
}
}
return wtx.Commit()
}); err != nil {
return err
}
return nil
}
}
// relKey, generates the new relation key using the object type and key instead of object id.
func relKey[T relationType](v T, d ds.Direction) string {
switch d {
// obj_type : obj_id | relation | sub_type : sub_id
// when subject_relation is added this will become
// obj_type : obj_id | relation | sub_type : sub_id (# sub_rel)
case ds.ObjectToSubject:
return fmt.Sprintf("%s:%s|%s|%s:%s",
v.GetObject().GetType(),
v.GetObject().GetKey(),
v.GetRelation(),
v.GetSubject().GetType(),
v.GetSubject().GetKey(),
)
// sub_type : sub_id | relation | obj_type : obj_id
// when subject_relation is added this will become
// sub_type : sub_id (# sub_rel) | relation | obj_type : obj_id
case ds.SubjectToObject:
return fmt.Sprintf("%s:%s|%s|%s:%s",
v.GetSubject().GetType(),
v.GetSubject().GetKey(),
v.GetRelation(),
v.GetObject().GetType(),
v.GetObject().GetKey(),
)
default:
return ""
}
}