Tarantool filer store (#6669)

Co-authored-by: Marat Karimov <m.karimov@digitalms.ru>

weed/filer/tarantool/tarantool_store_kv.go

@@ -0,0 +1,95 @@
+//go:build tarantool
+// +build tarantool
+
+package tarantool
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+
+	"github.com/seaweedfs/seaweedfs/weed/filer"
+	"github.com/tarantool/go-tarantool/v2/crud"
+	"github.com/tarantool/go-tarantool/v2/pool"
+)
+
+const (
+	tarantoolKVSpaceName = "key_value"
+)
+
+func (store *TarantoolStore) KvPut(ctx context.Context, key []byte, value []byte) (err error) {
+
+	var operations = []crud.Operation{
+		{
+			Operator: crud.Insert,
+			Field:    "value",
+			Value:    string(value),
+		},
+	}
+
+	req := crud.MakeUpsertRequest(tarantoolKVSpaceName).
+		Tuple([]interface{}{string(key), nil, string(value)}).
+		Operations(operations)
+
+	ret := crud.Result{}
+	if err := store.pool.Do(req, pool.RW).GetTyped(&ret); err != nil {
+		return fmt.Errorf("kv put: %v", err)
+	}
+
+	return nil
+}
+
+func (store *TarantoolStore) KvGet(ctx context.Context, key []byte) (value []byte, err error) {
+
+	getOpts := crud.GetOpts{
+		Fields:        crud.MakeOptTuple([]interface{}{"value"}),
+		Mode:          crud.MakeOptString("read"),
+		PreferReplica: crud.MakeOptBool(true),
+		Balance:       crud.MakeOptBool(true),
+	}
+
+	req := crud.MakeGetRequest(tarantoolKVSpaceName).
+		Key(crud.Tuple([]interface{}{string(key)})).
+		Opts(getOpts)
+
+	resp := crud.Result{}
+
+	err = store.pool.Do(req, pool.PreferRO).GetTyped(&resp)
+	if err != nil {
+		return nil, err
+	}
+
+	results, ok := resp.Rows.([]interface{})
+	if !ok || len(results) != 1 {
+		return nil, filer.ErrKvNotFound
+	}
+
+	rows, ok := results[0].([]interface{})
+	if !ok || len(rows) != 1 {
+		return nil, filer.ErrKvNotFound
+	}
+
+	row, ok := rows[0].(string)
+	if !ok {
+		return nil, fmt.Errorf("Can't convert rows[0] field to string. Actual type: %v, value: %v", reflect.TypeOf(rows[0]), rows[0])
+	}
+
+	return []byte(row), nil
+}
+
+func (store *TarantoolStore) KvDelete(ctx context.Context, key []byte) (err error) {
+
+	delOpts := crud.DeleteOpts{
+		Noreturn: crud.MakeOptBool(true),
+	}
+
+	req := crud.MakeDeleteRequest(tarantoolKVSpaceName).
+		Key(crud.Tuple([]interface{}{string(key)})).
+		Opts(delOpts)
+
+	if _, err := store.pool.Do(req, pool.RW).Get(); err != nil {
+		return fmt.Errorf("kv delete: %v", err)
+	}
+
+	return nil
+}