blob: 48eb875074046133748416cd902d92234610ed43 [file] [log] [blame]
Scott Baker2c1c4822019-10-16 11:02:41 -07001// Copyright 2018 The etcd Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package balancer
16
17import (
18 "fmt"
19 "net/url"
20 "sort"
21 "sync/atomic"
22 "time"
23
24 "google.golang.org/grpc/balancer"
25 "google.golang.org/grpc/resolver"
26)
27
28func scToString(sc balancer.SubConn) string {
29 return fmt.Sprintf("%p", sc)
30}
31
32func scsToStrings(scs map[balancer.SubConn]resolver.Address) (ss []string) {
33 ss = make([]string, 0, len(scs))
34 for sc, a := range scs {
35 ss = append(ss, fmt.Sprintf("%s (%s)", a.Addr, scToString(sc)))
36 }
37 sort.Strings(ss)
38 return ss
39}
40
41func addrsToStrings(addrs []resolver.Address) (ss []string) {
42 ss = make([]string, len(addrs))
43 for i := range addrs {
44 ss[i] = addrs[i].Addr
45 }
46 sort.Strings(ss)
47 return ss
48}
49
50func epsToAddrs(eps ...string) (addrs []resolver.Address) {
51 addrs = make([]resolver.Address, 0, len(eps))
52 for _, ep := range eps {
53 u, err := url.Parse(ep)
54 if err != nil {
55 addrs = append(addrs, resolver.Address{Addr: ep, Type: resolver.Backend})
56 continue
57 }
58 addrs = append(addrs, resolver.Address{Addr: u.Host, Type: resolver.Backend})
59 }
60 return addrs
61}
62
63var genN = new(uint32)
64
65func genName() string {
66 now := time.Now().UnixNano()
67 return fmt.Sprintf("%X%X", now, atomic.AddUint32(genN, 1))
68}