[#220] blobstor: Add blobovnicza tree structure to BlobStor

Add blobovnicza instance to BlobStor structure. Create blobovnicza tree in
BlobStor constructor. Implement Open/Init/Close methods.

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

pkg/local_object_storage/blobstor/blobstor.go

@@ -13,6 +13,8 @@ import (
 // BlobStor represents NeoFS local BLOB storage.
 type BlobStor struct {
 	*cfg
+
+	blobovniczas *blobovniczas
 }
 
 // Option represents BlobStor's constructor option.
@@ -79,7 +81,8 @@ func New(opts ...Option) *BlobStor {
 	}
 
 	return &BlobStor{
-		cfg: c,
+		cfg:          c,
+		blobovniczas: newBlobovniczaTree(c),
 	}
 }
 

pkg/local_object_storage/blobstor/control.go

@@ -0,0 +1,24 @@
+package blobstor
+
+// Open opens BlobStor.
+func (b *BlobStor) Open() error {
+	b.log.Debug("opening...")
+
+	return nil
+}
+
+// Init initializes internal data structures and system resources.
+//
+// If BlobStor is already initialized, then no action is taken.
+func (b *BlobStor) Init() error {
+	b.log.Debug("initializing...")
+
+	return b.blobovniczas.init()
+}
+
+// Close releases all internal resources of BlobStor.
+func (b *BlobStor) Close() error {
+	b.log.Debug("closing...")
+
+	return b.blobovniczas.close()
+}