升级流程引擎配置文件版本

vendor/go.mongodb.org/mongo-driver/mongo/description/topology_kind.go

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+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package description
+
+// TopologyKind represents a specific topology configuration.
+type TopologyKind uint32
+
+// These constants are the available topology configurations.
+const (
+	Single                TopologyKind = 1
+	ReplicaSet            TopologyKind = 2
+	ReplicaSetNoPrimary   TopologyKind = 4 + ReplicaSet
+	ReplicaSetWithPrimary TopologyKind = 8 + ReplicaSet
+	Sharded               TopologyKind = 256
+	LoadBalanced          TopologyKind = 512
+)
+
+// String implements the fmt.Stringer interface.
+func (kind TopologyKind) String() string {
+	switch kind {
+	case Single:
+		return "Single"
+	case ReplicaSet:
+		return "ReplicaSet"
+	case ReplicaSetNoPrimary:
+		return "ReplicaSetNoPrimary"
+	case ReplicaSetWithPrimary:
+		return "ReplicaSetWithPrimary"
+	case Sharded:
+		return "Sharded"
+	case LoadBalanced:
+		return "LoadBalanced"
+	}
+
+	return "Unknown"
+}