/
resolver.go
68 lines (61 loc) · 1.53 KB
/
resolver.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
63
64
65
66
67
68
package docker
import (
"context"
"errors"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/client"
)
// idResolver provides ID to Name resolution.
type idResolver struct {
client client.APIClient
noResolve bool
cache map[string]string
}
// New creates a new IDResolver.
func newResolver(client client.APIClient, noResolve bool) *idResolver {
return &idResolver{
client: client,
noResolve: noResolve,
cache: make(map[string]string),
}
}
func (r *idResolver) get(ctx context.Context, t interface{}, id string) (string, error) {
switch t.(type) {
case swarm.Node:
node, _, err := r.client.NodeInspectWithRaw(ctx, id)
if err != nil {
return id, nil
}
if node.Spec.Annotations.Name != "" {
return node.Spec.Annotations.Name, nil
}
if node.Description.Hostname != "" {
return node.Description.Hostname, nil
}
return id, nil
case swarm.Service:
service, _, err := r.client.ServiceInspectWithRaw(ctx, id, types.ServiceInspectOptions{})
if err != nil {
return id, nil
}
return service.Spec.Annotations.Name, nil
default:
return "", errors.New("unsupported type")
}
}
// Resolve will attempt to resolve an ID to a Name by querying the manager.
func (r *idResolver) Resolve(ctx context.Context, t interface{}, id string) (string, error) {
if r.noResolve {
return id, nil
}
if name, ok := r.cache[id]; ok {
return name, nil
}
name, err := r.get(ctx, t, id)
if err != nil {
return "", err
}
r.cache[id] = name
return name, nil
}