forked from TrueCloudLab/frostfs-node
128 lines
3.7 KiB
Go
128 lines
3.7 KiB
Go
package blobovniczatree
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import (
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"context"
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"encoding/hex"
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"fmt"
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"time"
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"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobovnicza"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
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tracingPkg "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/tracing"
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"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
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apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/trace"
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"go.uber.org/zap"
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)
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// Get reads object from blobovnicza tree.
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//
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// If blobocvnicza ID is specified, only this blobovnicza is processed.
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// Otherwise, all Blobovniczas are processed descending weight.
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func (b *Blobovniczas) Get(ctx context.Context, prm common.GetPrm) (res common.GetRes, err error) {
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var (
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startedAt = time.Now()
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success = false
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size = 0
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)
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defer func() {
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b.metrics.Get(time.Since(startedAt), size, success, prm.StorageID != nil)
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}()
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ctx, span := tracing.StartSpanFromContext(ctx, "Blobovniczas.Get",
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trace.WithAttributes(
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attribute.String("path", b.rootPath),
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attribute.String("address", prm.Address.EncodeToString()),
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attribute.String("storage_id", hex.EncodeToString(prm.StorageID)),
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attribute.Bool("raw", prm.Raw),
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))
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defer span.End()
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var bPrm blobovnicza.GetPrm
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bPrm.SetAddress(prm.Address)
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if prm.StorageID != nil {
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id := NewIDFromBytes(prm.StorageID)
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shBlz := b.getBlobovnicza(ctx, id.Path())
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blz, err := shBlz.Open(ctx)
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if err != nil {
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return res, err
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}
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defer shBlz.Close()
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res, err = b.getObject(ctx, blz, bPrm)
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if err == nil {
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success = true
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size = len(res.RawData)
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}
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return res, err
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}
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err = b.iterateSortedDBPaths(ctx, prm.Address, func(p string) (bool, error) {
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res, err = b.getObjectFromLevel(ctx, bPrm, p)
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if err != nil {
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if !client.IsErrObjectNotFound(err) {
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b.log.Debug(ctx, logs.BlobovniczatreeCouldNotGetObjectFromLevel,
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zap.String("level", p),
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zap.String("error", err.Error()),
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zap.String("trace_id", tracingPkg.GetTraceID(ctx)),
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)
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}
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}
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// abort iterator if found, otherwise process all Blobovniczas
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return err == nil, nil
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})
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if err == nil && res.Object == nil {
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// not found in any blobovnicza
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return res, logicerr.Wrap(new(apistatus.ObjectNotFound))
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}
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success = true
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size = len(res.RawData)
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return
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}
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// tries to read object from particular blobovnicza.
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//
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// returns error if object could not be read from any blobovnicza of the same level.
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func (b *Blobovniczas) getObjectFromLevel(ctx context.Context, prm blobovnicza.GetPrm, blzPath string) (common.GetRes, error) {
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// open blobovnicza (cached inside)
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shBlz := b.getBlobovnicza(ctx, blzPath)
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blz, err := shBlz.Open(ctx)
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if err != nil {
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return common.GetRes{}, err
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}
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defer shBlz.Close()
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return b.getObject(ctx, blz, prm)
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}
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// reads object from blobovnicza and returns GetSmallRes.
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func (b *Blobovniczas) getObject(ctx context.Context, blz *blobovnicza.Blobovnicza, prm blobovnicza.GetPrm) (common.GetRes, error) {
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res, err := blz.Get(ctx, prm)
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if err != nil {
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return common.GetRes{}, err
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}
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// decompress the data
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data, err := b.compression.Decompress(res.Object())
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if err != nil {
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return common.GetRes{}, fmt.Errorf("could not decompress object data: %w", err)
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}
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// unmarshal the object
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obj := objectSDK.New()
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if err := obj.Unmarshal(data); err != nil {
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return common.GetRes{}, fmt.Errorf("could not unmarshal the object: %w", err)
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}
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return common.GetRes{Object: obj, RawData: data}, nil
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}
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