/
group_key.go
62 lines (53 loc) · 1.47 KB
/
group_key.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
// Copyright 2021 MatrixOrigin.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"bytes"
"fmt"
"sort"
"github.com/fagongzi/util/format"
"github.com/matrixorigin/matrixcube/components/prophet/pb/metapb"
)
// EncodeGroupKey encode group key
func EncodeGroupKey(group uint64, rules []metapb.ScheduleGroupRule, labels []metapb.Pair) string {
var buf bytes.Buffer
buf.Write(format.Uint64ToBytes(group))
if len(rules) == 0 {
return buf.String()
}
sort.Slice(rules, func(i, j int) bool {
return rules[i].ID < rules[j].ID
})
labelMap := make(map[string]string)
for _, label := range labels {
labelMap[label.Key] = label.Value
}
for _, r := range rules {
buf.WriteByte(0)
if v, ok := labelMap[r.GroupByLabel]; ok {
buf.WriteString(v)
}
}
return buf.String()
}
// DecodeGroupKey decode group key, returns group id
func DecodeGroupKey(key string) uint64 {
if key == "" {
return 0
}
v := []byte(key)
if len(v) < 8 {
panic(fmt.Sprintf("invalid group key: %+v", v))
}
return format.MustBytesToUint64(v[:8])
}