frostfs-node/pkg/local_object_storage/writecache/writecachebbolt/get.go
Alejandro Lopez 5b7e4a51b7 [#481] Update frostfs-sdk-go and error pointer receivers
Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>
2023-08-09 10:26:53 +00:00

102 lines
3 KiB
Go

package writecachebbolt
import (
"context"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/writecache"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
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()
obj, err := c.getInternal(ctx, saddr, addr)
return obj, metaerr.Wrap(err)
}
func (c *cache) getInternal(ctx context.Context, saddr string, addr oid.Address) (*objectSDK.Object, error) {
found := false
storageType := writecache.StorageTypeUndefined
startedAt := time.Now()
defer func() {
c.metrics.Get(time.Since(startedAt), found, storageType)
}()
value, err := Get(c.db, []byte(saddr))
if err == nil {
obj := objectSDK.New()
found = true
storageType = writecache.StorageTypeDB
return obj, obj.Unmarshal(value)
}
res, err := c.fsTree.Get(ctx, common.GetPrm{Address: addr})
if err != nil {
return nil, logicerr.Wrap(new(apistatus.ObjectNotFound))
}
found = true
storageType = writecache.StorageTypeFSTree
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) {
saddr := addr.EncodeToString()
ctx, span := tracing.StartSpanFromContext(ctx, "writecache.Head",
trace.WithAttributes(
attribute.String("address", saddr),
))
defer span.End()
obj, err := c.getInternal(ctx, saddr, addr)
if err != nil {
return nil, metaerr.Wrap(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(new(apistatus.ObjectNotFound))
}
value = slice.Copy(value)
return nil
})
return value, metaerr.Wrap(err)
}