func (m *mdnsRegistry) ListServices() ([]*registry.Service, error) {
p := mdns.DefaultParams("_services")
p.Timeout = m.opts.Timeout
entryCh := make(chan *mdns.ServiceEntry, 10)
p.Entries = entryCh
exit := make(chan bool)
defer close(exit)
serviceMap := make(map[string]bool)
var services []*registry.Service
go func() {
for {
select {
case e := <-entryCh:
if e.TTL == 0 {
continue
}
name := strings.TrimSuffix(e.Name, "."+p.Service+"."+p.Domain+".")
if !serviceMap[name] {
serviceMap[name] = true
services = append(services, ®istry.Service{Name: name})
}
case <-exit:
return
}
}
}()
if err := mdns.Query(p); err != nil {
return nil, err
}
return services, nil
}
func (m *mdnsRegistry) GetService(service string) ([]*registry.Service, error) {
p := mdns.DefaultParams(service)
p.Timeout = m.opts.Timeout
entryCh := make(chan *mdns.ServiceEntry, 10)
p.Entries = entryCh
exit := make(chan bool)
defer close(exit)
serviceMap := make(map[string]*registry.Service)
go func() {
for {
select {
case e := <-entryCh:
// list record so skip
if p.Service == "_services" {
continue
}
if e.TTL == 0 {
continue
}
txt, err := decode(e.InfoFields)
if err != nil {
continue
}
if txt.Service != service {
continue
}
s, ok := serviceMap[txt.Version]
if !ok {
s = ®istry.Service{
Name: txt.Service,
Version: txt.Version,
Endpoints: txt.Endpoints,
}
}
s.Nodes = append(s.Nodes, ®istry.Node{
Id: strings.TrimSuffix(e.Name, "."+p.Service+"."+p.Domain+"."),
Address: e.AddrV4.String(),
Port: e.Port,
Metadata: txt.Metadata,
})
serviceMap[txt.Version] = s
case <-exit:
return
}
}
}()
if err := mdns.Query(p); err != nil {
return nil, err
}
// create list and return
var services []*registry.Service
for _, service := range serviceMap {
services = append(services, service)
}
return services, nil
}