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key.go
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key.go
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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package vppnode
import (
"strconv"
"strings"
)
// Keyword defines the keyword identifying VppNode data.
const Keyword = "vppnode"
// KeyPrefix is a key prefix used in DB to store instances of VppNode,
// one for every node in the cluster.
const KeyPrefix = "allocatedIDs/"
// Key returns the key under which VppNode data for a node with the given ID
// should be stored in the data-store.
func Key(id uint32) string {
return KeyPrefix + strconv.FormatUint(uint64(id), 10)
}
// ParseKey parses node ID from key identifying VppNode data.
// Returns 0 if parsing fails (invalid node ID).
func ParseKey(key string) (id uint32) {
if strings.HasPrefix(key, KeyPrefix) {
nodeID, err := strconv.Atoi(strings.TrimPrefix(key, KeyPrefix))
if err == nil {
return uint32(nodeID)
}
}
return 0
}