134 lines
2.9 KiB
Go
134 lines
2.9 KiB
Go
package registry
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import (
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"context"
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"encoding/binary"
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"errors"
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"fmt"
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"os"
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"time"
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"go.etcd.io/bbolt"
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)
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type ObjRegistry struct {
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ctx context.Context
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cancel context.CancelFunc
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boltDB *bbolt.DB
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}
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const (
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// Indicates that an object was created, but its data wasn't verified yet.
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statusCreated = "created"
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)
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// NewObjRegistry creates a new instance of object registry that stores information
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// about objects in the specified bolt database. As registry uses read-write
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// connection to the database, there may be only one instance of object registry
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// per database file at a time.
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func NewObjRegistry(ctx context.Context, dbFilePath string) *ObjRegistry {
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options := bbolt.Options{Timeout: 100 * time.Millisecond}
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boltDB, err := bbolt.Open(dbFilePath, os.ModePerm, &options)
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if err != nil {
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panic(err)
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}
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ctx, cancel := context.WithCancel(ctx)
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objRepository := &ObjRegistry{
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ctx: ctx,
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cancel: cancel,
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boltDB: boltDB,
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}
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return objRepository
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}
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func (o *ObjRegistry) AddObject(cid, oid, s3Bucket, s3Key, payloadHash string) error {
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return o.boltDB.Update(func(tx *bbolt.Tx) error {
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b, err := tx.CreateBucketIfNotExists([]byte(statusCreated))
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if err != nil {
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return err
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}
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id, err := b.NextSequence()
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if err != nil {
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return err
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}
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object := ObjectInfo{
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Id: id,
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CreatedAt: time.Now().UTC().Unix(),
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CID: cid,
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OID: oid,
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S3Bucket: s3Bucket,
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S3Key: s3Key,
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PayloadHash: payloadHash,
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Status: statusCreated,
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}
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objBytes, err := object.Marshal()
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if err != nil {
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return err
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}
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return b.Put(encodeId(id), objBytes)
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})
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}
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func (o *ObjRegistry) SetObjectStatus(id uint64, oldStatus, newStatus string) error {
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return o.boltDB.Update(func(tx *bbolt.Tx) error {
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oldB := tx.Bucket([]byte(oldStatus))
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if oldB == nil {
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return fmt.Errorf("bucket doesn't exist: '%s'", oldStatus)
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}
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key := encodeId(id)
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objBytes := oldB.Get(key)
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if objBytes == nil {
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return errors.New("object doesn't exist")
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}
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if err := oldB.Delete(key); err != nil {
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return fmt.Errorf("bucket.Delete: %w", err)
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}
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obj := new(ObjectInfo)
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if err := obj.Unmarshal(objBytes); err != nil {
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return err
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}
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obj.Status = newStatus
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objBytes, err := obj.Marshal()
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if err != nil {
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return err
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}
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newB, err := tx.CreateBucketIfNotExists([]byte(newStatus))
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if err != nil {
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return err
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}
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return newB.Put(encodeId(id), objBytes)
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})
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}
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func (o *ObjRegistry) DeleteObject(id uint64) error {
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return o.boltDB.Update(func(tx *bbolt.Tx) error {
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return tx.ForEach(func(_ []byte, b *bbolt.Bucket) error {
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return b.Delete(encodeId(id))
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})
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})
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}
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func (o *ObjRegistry) Close() error {
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o.cancel()
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return o.boltDB.Close()
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}
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func encodeId(id uint64) []byte {
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idBytes := make([]byte, 8)
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binary.BigEndian.PutUint64(idBytes, id)
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return idBytes
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}
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func decodeId(idBytes []byte) uint64 {
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return binary.BigEndian.Uint64(idBytes)
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}
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