[#176] localstore: Implement shard methods via Metabase and BlobStor

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/local_object_storage/metabase/exists.go

@@ -0,0 +1,21 @@
+package meta
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/pkg/errors"
+)
+
+// Exists checks if object is presented in metabase.
+func (db *DB) Exists(addr *object.Address) (bool, error) {
+	// FIXME: temp solution, avoid direct Get usage
+	_, err := db.Get(addr)
+	if err != nil {
+		if errors.Is(err, errNotFound) {
+			return false, nil
+		}
+
+		return false, err
+	}
+
+	return true, nil
+}

pkg/local_object_storage/shard/delete.go

@@ -2,6 +2,9 @@ package shard
 
 import (
 	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
 )
 
 // DeletePrm groups the parameters of Delete operation.
@@ -31,7 +34,19 @@ func (s *Shard) Delete(prm *DeletePrm) (*DeleteRes, error) {
 	s.mtx.Lock()
 	defer s.mtx.Unlock()
 
-	// FIXME: implement me
+	// mark object to delete in metabase
+	if err := s.metaBase.Delete(prm.addr); err != nil {
+		s.log.Warn("could not mark object to delete in metabase",
+			zap.String("error", err.Error()),
+		)
+	}
+
+	if _, err := s.blobStor.Delete(
+		new(blobstor.DeletePrm).
+			WithAddress(prm.addr),
+	); err != nil {
+		return nil, errors.Wrap(err, "could not remove object from BLOB storage")
+	}
 
 	return nil, nil
 }

pkg/local_object_storage/shard/get.go

@@ -5,6 +5,7 @@ import (
 
 	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
 )
 
 // GetPrm groups the parameters of Get operation.
@@ -73,7 +74,47 @@ func (s *Shard) Get(prm *GetPrm) (*GetRes, error) {
 	s.mtx.RLock()
 	defer s.mtx.RUnlock()
 
-	// FIXME: implement me
+	if prm.ln < 0 {
+		// try to read from WriteCache
+		// TODO: implement
 
-	return nil, nil
+		res, err := s.blobStor.Get(
+			new(blobstor.GetPrm).
+				WithAddress(prm.addr),
+		)
+		if err != nil {
+			if errors.Is(err, blobstor.ErrObjectNotFound) {
+				err = ErrObjectNotFound
+			}
+
+			return nil, err
+		}
+
+		return &GetRes{
+			obj: res.Object(),
+		}, nil
+	}
+
+	// try to read from WriteCache
+	// TODO: implement
+
+	res, err := s.blobStor.GetRange(
+		new(blobstor.GetRangePrm).
+			WithAddress(prm.addr).
+			WithPayloadRange(prm.off, uint64(prm.ln)),
+	)
+	if err != nil {
+		if errors.Is(err, blobstor.ErrObjectNotFound) {
+			err = ErrObjectNotFound
+		}
+
+		return nil, err
+	}
+
+	obj := object.NewRaw()
+	obj.SetPayload(res.RangeData())
+
+	return &GetRes{
+		obj: obj.Object(),
+	}, nil
 }

pkg/local_object_storage/shard/put.go

@@ -2,6 +2,8 @@ package shard
 
 import (
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	"github.com/pkg/errors"
 )
 
 // PutPrm groups the parameters of Put operation.
@@ -29,7 +31,31 @@ func (s *Shard) Put(prm *PutPrm) (*PutRes, error) {
 	s.mtx.Lock()
 	defer s.mtx.Unlock()
 
-	// FIXME: implement me
+	// check object existence
+	ex, err := s.metaBase.Exists(prm.obj.Address())
+	if err != nil {
+		return nil, errors.Wrap(err, "could not check object existence")
+	} else if ex {
+		return nil, nil
+	}
+
+	// try to put to WriteCache
+	// TODO: implement
+
+	// put to BlobStor
+	if _, err := s.blobStor.Put(
+		new(blobstor.PutPrm).
+			WithObject(prm.obj),
+	); err != nil {
+		return nil, errors.Wrap(err, "could not put object to BLOB storage")
+	}
+
+	// put to metabase
+	if err := s.metaBase.Put(prm.obj); err != nil {
+		// may we need to handle this case in a special way
+		// since the object has been successfully written to BlobStor
+		return nil, errors.Wrap(err, "could not put object to metabase")
+	}
 
 	return nil, nil
 }

pkg/local_object_storage/shard/select.go

@@ -2,6 +2,7 @@ package shard
 
 import (
 	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/pkg/errors"
 )
 
 // SelectPrm groups the parameters of Select operation.
@@ -36,7 +37,12 @@ func (s *Shard) Select(prm *SelectPrm) (*SelectRes, error) {
 	s.mtx.RLock()
 	defer s.mtx.RUnlock()
 
-	// FIXME: implement me
+	addrList, err := s.metaBase.Select(prm.filters)
-
+	if err != nil {
-	return nil, nil
+		return nil, errors.Wrap(err, "could not select objects from metabase")
+	}
+
+	return &SelectRes{
+		addrList: addrList,
+	}, nil
 }

pkg/local_object_storage/shard/shard.go

@@ -2,6 +2,10 @@ package shard
 
 import (
 	"sync"
+
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
+	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
+	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
 )
 
 // Shard represents single shard of NeoFS Local Storage Engine.
@@ -11,6 +15,10 @@ type Shard struct {
 	mtx *sync.RWMutex
 
 	weight WeightValues
+
+	blobStor *blobstor.BlobStor
+
+	metaBase *meta.DB
 }
 
 // Option represents Shard's constructor option.
@@ -18,6 +26,12 @@ type Option func(*cfg)
 
 type cfg struct {
 	id *ID
+
+	blobOpts []blobstor.Option
+
+	metaOpts []meta.Option
+
+	log *logger.Logger
 }
 
 func defaultCfg() *cfg {
@@ -35,6 +49,8 @@ func New(opts ...Option) *Shard {
 	return &Shard{
 		cfg:      c,
 		mtx:      new(sync.RWMutex),
+		blobStor: blobstor.New(c.blobOpts...),
+		metaBase: meta.NewDB(c.metaOpts...),
 	}
 }
 
@@ -44,3 +60,24 @@ func WithID(id *ID) Option {
 		c.id = id
 	}
 }
+
+// WithBlobStorOptions returns option to set internal BlobStor options.
+func WithBlobStorOptions(opts []blobstor.Option) Option {
+	return func(c *cfg) {
+		c.blobOpts = opts
+	}
+}
+
+// WithMetaBaseOptions returns option to set internal metabase options.
+func WithMetaBaseOptions(opts []meta.Option) Option {
+	return func(c *cfg) {
+		c.metaOpts = opts
+	}
+}
+
+// WithLogger returns option to set Shard's logger.
+func WithLogger(l *logger.Logger) Option {
+	return func(c *cfg) {
+		c.log = l
+	}
+}