/
watcher.go
53 lines (45 loc) · 979 Bytes
/
watcher.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
package memory
import (
"errors"
"github.com/micro/go-micro/v3/registry"
)
type Watcher struct {
id string
wo registry.WatchOptions
res chan *registry.Result
exit chan bool
}
func (m *Watcher) Next() (*registry.Result, error) {
for {
select {
case r := <-m.res:
if r.Service == nil {
continue
}
if len(m.wo.Service) > 0 && m.wo.Service != r.Service.Name {
continue
}
// extract domain from service metadata
var domain string
if r.Service.Metadata != nil && len(r.Service.Metadata["domain"]) > 0 {
domain = r.Service.Metadata["domain"]
} else {
domain = registry.DefaultDomain
}
// only send the event if watching the wildcard or this specific domain
if m.wo.Domain == registry.WildcardDomain || m.wo.Domain == domain {
return r, nil
}
case <-m.exit:
return nil, errors.New("watcher stopped")
}
}
}
func (m *Watcher) Stop() {
select {
case <-m.exit:
return
default:
close(m.exit)
}
}