frostfs-node/pkg/local_object_storage/blobstor/get_range.go

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package blobstor
import (
"context"
"encoding/hex"
"strconv"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
// GetRange reads object payload data from b.
// If the descriptor is present, only one sub-storage is tried,
// Otherwise, each sub-storage is tried in order.
func (b *BlobStor) GetRange(ctx context.Context, prm common.GetRangePrm) (res common.GetRangeRes, err error) {
startedAt := time.Now()
defer func() {
b.metrics.GetRange(time.Since(startedAt), len(res.Data), err == nil, prm.StorageID != nil)
}()
ctx, span := tracing.StartSpanFromContext(ctx, "BlobStor.GetRange",
trace.WithAttributes(
attribute.String("address", prm.Address.EncodeToString()),
attribute.String("storage_id", hex.EncodeToString(prm.StorageID)),
attribute.String("offset", strconv.FormatUint(prm.Range.GetOffset(), 10)),
attribute.String("length", strconv.FormatUint(prm.Range.GetLength(), 10)),
))
defer span.End()
b.modeMtx.RLock()
defer b.modeMtx.RUnlock()
if prm.StorageID == nil {
for i := range b.storage {
res, err = b.storage[i].Storage.GetRange(ctx, prm)
if err == nil || !client.IsErrObjectNotFound(err) {
return res, err
}
}
return common.GetRangeRes{}, logicerr.Wrap(new(apistatus.ObjectNotFound))
}
if len(prm.StorageID) == 0 {
res, err = b.storage[len(b.storage)-1].Storage.GetRange(ctx, prm)
} else {
res, err = b.storage[0].Storage.GetRange(ctx, prm)
}
return res, err
}