OP#792 initial commit after fork

internal/grid/errors.go

@@ -0,0 +1,43 @@
+// Copyright (c) 2015-2023 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package grid
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	// ErrUnknownHandler is returned when an unknown handler is requested.
+	ErrUnknownHandler = errors.New("unknown mux handler")
+
+	// ErrHandlerAlreadyExists is returned when a handler is already registered.
+	ErrHandlerAlreadyExists = errors.New("mux handler already exists")
+
+	// ErrIncorrectSequence is returned when an out-of-sequence item is received.
+	ErrIncorrectSequence = errors.New("out-of-sequence item received")
+)
+
+// ErrResponse is a remote error response.
+type ErrResponse struct {
+	msg string
+}
+
+func (e ErrResponse) Error() string {
+	return fmt.Sprintf("remote: %s", e.msg)
+}