package writecache import ( "context" "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/pkg/tracing" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr" apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status" objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object" oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id" "github.com/nspcc-dev/neo-go/pkg/util/slice" "go.etcd.io/bbolt" "go.opentelemetry.io/otel/attribute" "go.opentelemetry.io/otel/trace" ) // Get returns object from write-cache. // // Returns an error of type apistatus.ObjectNotFound if the requested object is missing in write-cache. func (c *cache) Get(ctx context.Context, addr oid.Address) (*objectSDK.Object, error) { saddr := addr.EncodeToString() ctx, span := tracing.StartSpanFromContext(ctx, "writecache.Get", trace.WithAttributes( attribute.String("address", saddr), )) defer span.End() value, err := Get(c.db, []byte(saddr)) if err == nil { obj := objectSDK.New() c.flushed.Get(saddr) return obj, obj.Unmarshal(value) } res, err := c.fsTree.Get(ctx, common.GetPrm{Address: addr}) if err != nil { return nil, logicerr.Wrap(apistatus.ObjectNotFound{}) } c.flushed.Get(saddr) return res.Object, nil } // Head returns object header from write-cache. // // Returns an error of type apistatus.ObjectNotFound if the requested object is missing in write-cache. func (c *cache) Head(ctx context.Context, addr oid.Address) (*objectSDK.Object, error) { ctx, span := tracing.StartSpanFromContext(ctx, "writecache.Head", trace.WithAttributes( attribute.String("address", addr.EncodeToString()), )) defer span.End() obj, err := c.Get(ctx, addr) if err != nil { return nil, err } return obj.CutPayload(), nil } // Get fetches object from the underlying database. // Key should be a stringified address. // // Returns an error of type apistatus.ObjectNotFound if the requested object is missing in db. func Get(db *bbolt.DB, key []byte) ([]byte, error) { var value []byte err := db.View(func(tx *bbolt.Tx) error { b := tx.Bucket(defaultBucket) if b == nil { return ErrNoDefaultBucket } value = b.Get(key) if value == nil { return logicerr.Wrap(apistatus.ObjectNotFound{}) } value = slice.Copy(value) return nil }) return value, err }